Studies using roentgen stereophotogrammetric analysis (RSA) have shown that the femoral components of cemented total hip replacements (THR) migrate distally relative to the bone, but it is not clear whether this occurs at the cement-implant or the cement-bone interface or within the cement mantle. Our aim was to determine where this migration occurred, since this has important implications for the way in which implants function and fail. Using RSA we compared for two years the migration of the tip of the stem with that of the cement restrictor for two different designs of
Objectives. To investigate psychosocial and biomedical outcomes following
total hip replacement (THR) and to identify predictors of recovery
from
The timing of total hip replacement (THR) in
patients with active tuberculosis (TB) of the hip is controversial, because
of the potential risk of reactivation of infection. There is little
information about the outcome of
Total hip replacement (THR) has been shown to
be a cost-effective procedure. However, it is not risk-free. Certain conditions,
such as diabetes mellitus, are thought to increase the risk of complications.
In this study we have evaluated the prevalence of diabetes mellitus
in patients undergoing
Total hip replacement (THR) after acetabular
fracture presents unique challenges to the orthopaedic surgeon.
The majority of patients can be treated with a standard
There is little in the literature on the level
of participation in sports which patients undertake after total
hip replacement (THR). Our aims in this study were to determine
first, the level of sporting activity, second, the predictive factors
for returning to sporting activity, and third, the correlation between
participation in sports and satisfaction after
United Kingdom National Institute for Health
and Clinical Excellence guidelines recommend the use of total hip replacement
(THR) for displaced intracapsular fractures of the femoral neck
in cognitively intact patients, who were independently mobile prior
to the injury. This study aimed to analyse the risk factors associated
with revision of the implant and mortality following
Pre-operative planning for total hip replacement
(THR) is challenging in hips with severe acetabular deformities, including
those with a hypoplastic acetabulum or severe defects and in the
presence of arthrodesis or ankylosis. We evaluated whether a Rapid
Prototype (RP) model, which is a life-sized reproduction based on
three-dimensional CT scans, can determine the feasibility of THR
and provide information about the size and position of the acetabular component
in severe acetabular deformities.
With greater numbers of younger patients undergoing
total hip replacement (THR), the effect of patient age on the diameter
of the femoral canal may become more relevant. This study aimed
to investigate the relationship between the diameter of the diaphysis
of the femoral canal with increasing age in a large number of patients
who underwent
We have used total hip replacement combined with cemented intramedullary nailing to treat a selected group of nine patients with pathological fractures of the proximal femur and impending fractures of the shaft due to metastases. One patient died from cardiopulmonary failure on the third postoperative day, but the others were able to walk within the first week after operation. Complications included one recurrent dislocation of the
Objectives. To define Patient Acceptable Symptom State (PASS) thresholds
for the Oxford hip score (OHS) and Oxford knee score (OKS) at mid-term
follow-up. Methods. In a prospective multicentre cohort study, OHS and OKS were collected
at a mean follow-up of three years (1.5 to 6.0), combined with a
numeric rating scale (NRS) for satisfaction and an external validation
question assessing the patient’s willingness to undergo surgery
again. A total of 550 patients underwent total hip replacement (THR)
and 367 underwent total knee replacement (TKR). Results. Receiver operating characteristic (ROC) curves identified a PASS
threshold of 42 for the OHS after
Although the Western Ontario and McMaster Universities
(WOMAC) osteoarthritis index was originally developed for the assessment
of non-operative treatment, it is commonly used to evaluate patients
undergoing either total hip (THR) or total knee replacement (TKR).
We assessed the importance of the 17 WOMAC function items from the perspective
of 1198 patients who underwent either
Patient expectations and their fulfilment are
an important factor in determining patient-reported outcome and satisfaction
of hip (THR) and knee replacement (TKR). The aim of this prospective
cohort study was to examine the expectations of patients undergoing
THR and TKR, and to identify differences in expectations, predictors
of high expectations and the relationship between the fulfilment
of expectations and patient-reported outcome measures. During the
study period, patients who underwent 346 THRs and 323 TKRs completed
an expectation questionnaire, Oxford score and Short-Form 12 (SF-12)
score pre-operatively. At one year post-operatively, the Oxford
score, SF-12, patient satisfaction and expectation fulfilment were
assessed. Univariable and multivariable analysis were performed.
Improvements in mobility and daytime pain were the most important
expectations in both groups. Expectation level did not differ between
THR and TKR. Poor Oxford score, younger age and male gender significantly
predicted high pre-operative expectations (p <
0.001). The level
of pre-operative expectation was not significantly associated with
the fulfilment of expectations or outcome.
The debate whether to use cemented or uncemented
components in primary total hip replacement (THR) has not yet been
considered with reference to the cost implications to the National
Health Service. We obtained the number of cemented and uncemented components
implanted in 2009 from the National Joint Registry for England and
Wales. The cost of each component was established. The initial financial
saving if all were cemented was then calculated. Subsequently the
five-year rates of revision for each type of component were reviewed
and the predicted number of revisions at five years for the actual
components used was compared with the predicted number of revisions
for a cemented
It has recently been reported that the transverse
acetabular ligament (TAL) is helpful in determining the position
of the acetabular component in total hip replacement (THR). In this
study we used a computer-assisted navigation system to determine
whether the TAL is useful as a landmark in
Autologous retransfusion and no-drainage are
both blood-saving measures in total hip replacement (THR). A new combined
intra- and post-operative autotransfusion filter system has been
developed especially for primary
It is accepted that resurfacing hip replacement
preserves the bone mineral density (BMD) of the femur better than total
hip replacement (THR). However, no studies have investigated any
possible difference on the acetabular side. Between April 2007 and March 2009, 39 patients were randomised
into two groups to receive either a resurfacing or a
Total hip replacement (THR) still is a rare intervention
in many African countries. In Burkina Faso it is not performed on
a regular basis. A visiting programme for
Objectives. The Oxford hip score (OHS) is a 12-item questionnaire designed
and developed to assess function and pain from the perspective of
patients who are undergoing total hip replacement (THR). The OHS
has been shown to be consistent, reliable, valid and sensitive to
clinical change following
We examined patient and surgical factors associated
with deep surgical site infection (SSI) following total hip replacement
(THR) in a large integrated healthcare system. A retrospective review
of a cohort of primary THRs performed between 2001 and 2009 was
conducted. Patient characteristics, surgical details, surgeon and
hospital volumes, and SSIs were identified using the Kaiser Permanente
Total Joint Replacement Registry (TJRR). Proportional-hazard regression
models were used to assess risk factors for SSI. The study cohort
consisted of 30 491 THRs, of which 17 474 (57%) were performed on
women. The mean age of the patients in the whole series was 65.5
years (13 to 97; . sd. 11.8) and the mean body mass index
was 29.3 kg/m. 2. (15 to 67; . sd. 5.9). The incidence
of SSI was 0.51% (155 of 30 491). Patient factors associated with
SSI included female gender, obesity, and American Society of Anesthesiologists
(ASA) score ≥ 3. Age, diagnosis, diabetes and race
were not associated with SSI. The only surgical factor associated
with SSI was a bilateral procedure. Surgeon and hospital volumes,
use of antibiotic-laden cement, fixation method, laminar flow, body
exhaust suits, surgical approach and fellowship training were not
associated with risk of SSI. A comprehensive infection surveillance system, combined with
a TJRR, identified patient and surgical factors associated with
SSI. Obesity and chronic medical conditions should be addressed
prior to
Peri-articular soft-tissue masses or ‘pseudotumours’
can occur after large-diameter metal-on-metal (MoM) resurfacing
of the hip and conventional total hip replacement (THR). Our aim
was to assess the incidence of pseudotumour formation and to identify
risk factors for their formation in a prospective cohort study. A total of 119 patients who underwent 120 MoM THRs with large-diameter
femoral heads between January 2005 and November 2007 were included
in the study. Outcome scores, serum metal ion levels, radiographs
and CT scans were obtained. Patients with symptoms or an identified
pseudotumour were offered MRI and an ultrasound-guided biopsy. There were 108 patients (109 hips) eligible for evaluation by
CT scan at a mean follow-up of 3.6 years (2.5 to 4.5); 42 patients
(39%) were diagnosed with a pseudotumour. The hips of 13 patients
(12%) were revised to a polyethylene acetabular component with small-diameter
metal head. Patients with elevated serum metal ion levels had a
four times increased risk of developing a pseudotumour. This study shows a substantially higher incidence of pseudotumour
formation and subsequent revisions in patients with MoM THRs than
previously reported. Because most revision cases were identified
only after an intensive screening protocol, we recommend close monitoring
of patients with MoM
We studied the migration of 58 cemented Hinek femoral components for total hip replacement,using roentgen stereophotogrammetric analysis over four years. The implants migrated faster during the first year than subsequently, and the pattern of migration in the second period was very different. During the first year they subsided, tilted into varus and internally rotated. After this there was slow distal migration with no change in orientation. None of the prostheses has yet failed. The early migration is probably caused by resorption of bone damaged by surgical trauma or the heat generated by the polymerisation of bone cement. Later migration may be due to creep in the bone cement or the surrounding fibrous membrane. The prosthesis which we studied allows the preservation of some of the femoral neck, and comparison with published migration studies of the Charnley stem suggests that this decreases rotation and may help to prevent loosening.
In developmental dysplasia of the hip (DDH),
a bone defect is often observed superior to the acetabulum after
the reconstruction at the level of the true acetabulum during total
hip replacement (THR). However, the essential amount of uncemented
acetabular component coverage required for a satisfactory outcome
remains controversial. The purpose of this study was to assess the
stability and function of acetabular components with a lack of coverage >
30% (31% to 50%). A total of 760 DDH patients underwent
We report an unusual complication of late dislocation of a total hip replacement. The femoral stem had completely migrated from the shaft. The insertion of a new long-stem prosthesis was successful.
We report the ten-year results for three designs of stem in 240 total hip replacements, for which subsidence had been measured on plain radiographs at regular intervals. Accurate migration patterns could be determined by the method of Einzel-Bild-Roentgen-Analyse-femoral component analysis (EBRA-FCA) for 158 hips (66%). Of these, 108 stems (68%) remained stable throughout, and five (3%) started to migrate after a median of 54 months. Initial migration of at least 1 mm was seen in 45 stems (29%) during the first two years, but these then became stable. We revised 17 stems for aseptic loosening, and 12 for other reasons. Revision for aseptic loosening could be predicted by EBRA-FCA with a sensitivity of 69%, a specificity of 80%, and an accuracy of 79% by the use of a threshold of subsidence of 1.5 mm during the first two years. Similar observations over a five-year period allowed the long-term outcome to be predicted with an accuracy of 91%. We discuss the importance of four different patterns of subsidence and confirm that the early measurement of migration by a reasonably accurate method can help to predict long-term outcome. Such methods should be used to evaluate new and modified designs of prosthesis.
We report the theoretical basis of a method to measure axial migration of femoral components of total hip replacements (THR). The use of the top of the greater trochanter and a lateral point on the collar of the stem, allowing for variations of up to 10 degrees rotation of the femur in any direction between successive radiographs, gave a maximum error of 0.37 mm. At a more realistic 5 degrees rotational variation, the error was only 0.13 mm. These data were confirmed in an experimental study using digitisation of points and special software. We also showed that the centre of the femoral head, the stem tip, and the lesser trochanter provided less accurate landmarks. In a second study we digitised a series of radiographs of 51 Charnley and 57 Stanmore THRs; the mean migration rates were found to be identical. We then studied 46 successful stems with a minimum follow-up of eight years and 46 stems which had failed by aseptic loosening at different times. At two years, the successful stems had migrated by a mean of 1.45 +/- 0.68 mm, but the failed cases had a mean migration of 4.32 +/- 2.58 mm (p <
0.0001). Of the successful cases 76% had migrated less than 2 mm, while in the failed group 84% had migrated more than 2 mm. For any particular case migration of more than 2.6 mm at two years had only a 5% chance of continuing success and would therefore merit special follow-up. Only 24% of the eventually successful stems showed migration at the stem-cement interface, but this had happened in every failed stem. We conclude that it would be possible to evaluate a new cemented design of femoral stem over a two-year period by the use of our method and to compare its performance against the reported known standard of the Charnley and Stanmore designs.
The outcome after total hip replacement has improved
with the development of surgical techniques, better pain management
and the introduction of enhanced recovery pathways. These pathways
require a multidisciplinary team to manage pre-operative education,
multimodal pain control and accelerated rehabilitation. The current economic
climate and restricted budgets favour brief hospitalisation while
minimising costs. This has put considerable pressure on hospitals
to combine excellent results, early functional recovery and shorter
admissions. In this review we present an evidence-based summary of some common
interventions and methods, including pre-operative patient education,
pre-emptive analgesia, local infiltration analgesia, pre-operative
nutrition, the use of pulsed electromagnetic fields, peri-operative
rehabilitation, wound dressings, different surgical techniques, minimally
invasive surgery and fast-track joint replacement units. Cite this article:
Despite the worldwide usage of the cemented Contemporary
acetabular component (Stryker), no published data are available
regarding its use in patients aged <
50 years. We undertook a
mid- to long-term follow-up study, including all consecutive patients
aged
<
50 years who underwent a primary total hip replacement using
the Contemporary acetabular component with the Exeter cemented stem
between January 1999 and January 2006. There were 152 hips in 126
patients, 61 men and 65 women, mean age at surgery 37.6 years (16
to 49 yrs). One patient was lost to follow-up. Mean clinical follow-up of all implants was 7.6 years (0.9 to
12.0). All clinical questionnaire scores, including Harris hip score,
Oxford hip score and several visual analogue scales, were found
to have improved. The eight year survivorship of all acetabular
components for the endpoints revision for any reason or revision
for aseptic loosening was 94.4% (95% confidence interval (CI) 89.2
to 97.2) and 96.4% (95% CI 91.6 to 98.5), respectively. Radiological follow-up
was complete for 146 implants. The eight year survival for the endpoint
radiological loosening was 93.1% (95% CI 86.2 to 96.6). Three surviving
implants were considered radiologically loose but were asymptomatic.
The presence of acetabular osteolysis (n = 17, 11.8%) and radiolucent
lines (n = 20, 13.9%) in the 144 surviving cups indicates a need
for continued observation in the second decade of follow-up in order
to observe their influence on long-term survival. The clinical and radiological data resulting in a ten-year survival
rate >
90% in young patients support the use of the Contemporary
acetabular component in this specific patient group. Cite this article:
Deficiency of the abductor mechanism is a well-recognised
cause of pain and limping after total hip replacement (THR). This
can be found incidentally at the time of surgery, or it may arise
as a result of damage to the superior gluteal nerve intra-operatively,
or after surgery owing to mechanical failure of the abductor muscle
repair or its detachment from the greater trochanter. The incidence
of abductor failure has been reported as high as 20% in some studies.
The management of this condition remains a dilemma for the treating
surgeon. We review the current state of knowledge concerning post-THR
abductor deficiency, including the aetiology, diagnosis and management,
and the outcomes of surgery for this condition. Cite this article:
To quantify and compare peri-acetabular bone mineral density
(BMD) between a monoblock acetabular component using a metal-on-metal
(MoM) bearing and a modular titanium shell with a polyethylene (PE)
insert. The secondary outcome was to measure patient-reported clinical
function. A total of 50 patients (25 per group) were randomised to MoM
or metal-on-polyethlene (MoP). There were 27 women (11 MoM) and
23 men (14 MoM) with a mean age of 61.6 years (47.7 to 73.2). Measurements
of peri-prosthetic acetabular and contralateral hip (covariate)
BMD were performed at baseline and at one and two years’ follow-up.
The Western Ontario and McMaster Universities osteoarthritis index
(WOMAC), University of California, Los Angeles (UCLA) activity score,
Harris hip score, and RAND-36 were also completed at these intervals.Objectives
Methods
We present our experience with a double-mobility
acetabular component in 155 consecutive revision total hip replacements
in 149 patients undertaken between 2005 and 2009, with particular
emphasis on the incidence of further dislocation. The mean age of
the patients was 77 years (42 to 89) with 59 males and 90 females.
In all, five patients died and seven were lost to follow-up. Indications
for revision were aseptic loosening in 113 hips, recurrent instability
in 29, peri-prosthetic fracture in 11 and sepsis in two. The mean
follow-up was 42 months (18 to 68). Three hips (2%) in three patients
dislocated within six weeks of surgery; one of these dislocated
again after one year. All three were managed successfully with closed
reduction. Two of the three dislocations occurred in patients who
had undergone revision for recurrent dislocation. All three were
found at revision to have abductor deficiency. There were no dislocations
in those revised for either aseptic loosening or sepsis. These results demonstrate a good mid-term outcome for this component.
In the 29 patients revised for instability, only two had a further
dislocation, both of which were managed by closed reduction.
We report the results at a mean of 24.3 years
(20 to 32) of 61 previously reported consecutive total hip replacements carried
out on 44 patients with severe congenital hip disease, performed
with reconstruction of the acetabulum with an impaction grafting
technique known as cotyloplasty. The mean age of the patients at
operation was 46.7 years (23 to 68) and all were women. The patients
were followed post-operatively for a mean of 24.3 years (20 to 32), using
the Merle d’Aubigné and Postel scoring system as modified by Charnley,
and with serial radiographs. At the time of the latest follow-up,
28 acetabular components had been revised because of aseptic loosening
at a mean of 15.9 years (6 to 26), and one at 40 days after surgery
because of repeated dislocations. The overall survival rate for aseptic
failure of the acetabular component at ten years was 93.1% (95%
confidence interval (CI) 86.5 to 96.7) when 53 hips were at risk,
and at 23 years was 56.1% (95% CI 49.4 to 62.8), when 22 hips remained
at risk. These long-term results are considered satisfactory for
the reconstruction of an acetabulum presenting with inadequate bone
stock and circumferential segmental defects. Cite this article:
We present the extended follow-up (≥ 20 years)
of a series of fully hydroxyapatite-coated femoral components used in
72 primary total hip replacements (THRs). Earlier results of this
cohort have been previously published. All procedures were performed
between 1986 and 1991. The series involved 45 women and 15 men with
12 bilateral procedures. Their mean age at the time of surgery was
60 years (46 to 80) and the mean duration of follow-up was 22.5
years (20 to 25). At final follow-up, the mean Merle d’Aubigné and
Postel hip scores were 5.5 (4.5 to 6), 3.8 (3.5 to 5) and 3.3 (3.0
to 5.0) for pain, mobility and function, respectively. Of the patients
92% were very satisfied at the time of final follow-up. There were seven revisions: six of the acetabular component for
aseptic loosening and one of both the stem and the acetabular component
for loosening due to deep infection. The survival of this prosthesis
at 22.5 years with revision for any reason as the endpoint was 91.7%
(95% confidence interval (CI) 84 to 99). Survival with aseptic loosening
of the stem as the endpoint was 100% (95% CI 90 to 100). This prosthesis provides pain relief in the long term. Survival
of this component is comparable to the best results for primary
THR with any means of fixation. Cite this article:
The practice of removing a well-fixed cementless
femoral component is associated with high morbidity. Ceramic bearing
couples are low wearing and their use minimises the risk of subsequent
further revision due to the production of wear debris. A total of
165 revision hip replacements were performed, in which a polyethylene-lined acetabular
component was revised to a new acetabular component with a ceramic
liner, while retaining the well-fixed femoral component. A titanium
sleeve was placed over the used femoral trunnion, to which a ceramic
head was added. There were 100 alumina and 65 Delta bearing couples
inserted. The mean Harris hip score improved significantly from 71.3 (9.0
to 100.0) pre-operatively to 91.0 (41.0 to 100.0) at a mean follow
up of 4.8 years (2.1 to 12.5) (p <
0.001). No patients reported
squeaking of the hip. There were two fractures of the ceramic head, both in alumina
bearings. No liners were seen to fracture. No fractures were observed
in components made of Delta ceramic. At 8.3 years post-operatively
the survival with any cause of failure as the endpoint was 96.6%
(95% confidence interval (CI) 85.7 to 99.3) for the acetabular component and
94.0% (95% CI 82.1 to 98.4) for the femoral component. The technique of revising the acetabular component in the presence
of a well-fixed femoral component with a ceramic head placed on
a titanium sleeve over the used trunnion is a useful adjunct in
revision hip practice. The use of Delta ceramic is recommended. Cite this article:
We performed a meta-analysis of modern total
joint replacement (TJR) to determine the post-operative mortality and
the cause of death using different thromboprophylactic regimens
as follows: 1) no routine chemothromboprophylaxis (NRC); 2) Potent
anticoagulation (PA) (unfractionated or low-molecular-weight heparin, ximelagatran,
fondaparinux or rivaroxaban); 3) Potent anticoagulation combined
(PAC) with regional anaesthesia and/or pneumatic compression devices
(PCDs); 4) Warfarin (W); 5) Warfarin combined (WAC) with regional anaesthesia
and/or PCD; and 6) Multimodal (MM) prophylaxis, including regional
anaesthesia, PCDs and aspirin in low-risk patients. Cause of death
was classified as autopsy proven, clinically certain or unknown.
Deaths were grouped into cardiopulmonary excluding pulmonary embolism
(PE), PE, bleeding-related, gastrointestinal, central nervous system,
and others (miscellaneous). Meta-analysis based on fixed effects
or random effects models was used for pooling incidence data. In all, 70 studies were included (99 441 patients; 373 deaths).
The mortality was lowest in the MM (0.2%) and WC (0.2%) groups.
The most frequent cause of death was cardiopulmonary (47.9%), followed
by PE (25.4%) and bleeding (8.9%). The proportion of deaths due
to PE was not significantly affected by the thromboprophylaxis regimen (PA, 35.5%;
PAC, 28%; MM, 23.2%; and NRC, 16.3%). Fatal bleeding was higher
in groups relying on the use of anticoagulation (W, 33.8%; PA, 9.4%;
PAC, 10.8%) but the differences were not statistically significant. Our study demonstrated that the routine use of PA does not reduce
the overall mortality or the proportion of deaths due to PE.
Noise generation has been reported with ceramic-on-ceramic
articulations in total hip replacement (THR). This study evaluated
208 consecutive Delta Motion THRs at a mean follow-up of 21 months
(12 to 35). There were 141 women and 67 men with a mean age of 59
years (22 to 84). Patients were reviewed clinically and radiologically,
and the incidence of noise was determined using a newly described
assessment method. Noise production was examined against range of
movement, ligamentous laxity, patient-reported outcome scores, activity
level and orientation of the acetabular component. There were 143
silent hips (69%), 22 (11%) with noises other than squeaking, 17
(8%) with unreproducible squeaking and 26 (13%) with reproducible
squeaking. Hips with reproducible squeaking had a greater mean range
of movement (p <
0.001) and mean ligament laxity (p = 0.004), smaller
median head size (p = 0.01) and decreased mean acetabular component
inclination (p = 0.02) and anteversion angle (p = 0.02) compared
with the other groups. There was no relationship between squeaking
and age (p = 0.13), height (p = 0.263), weight (p = 0.333), body
mass index (p = 0.643), gender (p = 0.07) or patient outcome score
(p = 0.422). There were no revisions during follow-up. Despite the
surprisingly high incidence of squeaking, all patients remain satisfied
with their hip replacement. Cite this article:
Since the introduction of the National Institute
for Health and Care Excellence (NICE) guidelines on thromboprophylaxis
and the use of extended thromboprophylaxis with new oral agents,
there have been reports of complications arising as a result of
their use. We have looked at the incidence of wound complications
after the introduction of dabigatran for thromboprophylaxis in our
unit. We investigated the rate of venous thromboembolism and wound
leakage in 1728 patients undergoing primary joint replacement, both
before and after the introduction of dabigatran, and following its
subsequent withdrawal from our unit. We found that the use of dabigatran led to a significant increase
in post-operative wound leakage (20% with dabigatran, 5% with a
multimodal regimen; p <
0.001), which also resulted in an increased
duration of hospital stay. The rate of thromboembolism in patients
receiving dabigatran was higher (1.3%) than in those receiving the multimodal
thromboprophylaxis regimen, including low molecular weight heparin
as an inpatient and the extended use of aspirin (0.3%, p = 0.047).
We have ceased the use of dabigatran for thromboprophylaxis in these
patients. Cite this article:
We are currently facing an epidemic of periprosthetic
fractures around the hip. They may occur either during surgery or
post-operatively. Although the acetabulum may be involved, the femur
is most commonly affected. We are being presented with new, difficult
fracture patterns around cemented and cementless implants, and we
face the challenge of an elderly population who may have grossly
deficient bone and may struggle to rehabilitate after such injuries.
The correct surgical management of these fractures is challenging.
This article will review the current choices of implants and techniques
available to deal with periprosthetic fractures of the femur. Cite this article:
We undertook a randomised controlled trial to
compare bipolar hemiarthroplasty (HA) with a novel total hip replacement
(THR) comprising a polycarbonate–urethane (PCU) acetabular component
coupled with a large-diameter metal femoral head for the treatment
of displaced fractures of the femoral neck in elderly patients. Functional
outcome, assessed with the Harris hip score (HHS) at three months
and then annually after surgery, was the primary endpoint. Rates
of revision and complication were secondary endpoints. Based on a power analysis, 96 consecutive patients aged >
70
years were randomised to receive either HA (49) or a PCU-THR (47).
The mean follow-up was 30.1 months (23 to 50) and 28.6 months (22
to 52) for the HA and the PCU group, respectively. The HHS showed no statistically significant difference between
the groups at every follow-up. Higher pain was recorded in the PCU
group at one and two years’ follow-up
(p = 0.006 and p = 0.019, respectively). In the HA group no revision
was performed. In the PCU-THR group six patients underwent revision
and one patient is currently awaiting
re-operation. The three-year survival rate of the PCU-THR group
was 0.841 (95% confidence interval 0.680 to 0.926). Based on our findings we do not recommend the use of the PCU
acetabular component as part of the treatment of patients with fractures
of the femoral neck. Cite this article:
The accuracy and precision of two new methods of model-based
radiostereometric analysis (RSA) were hypothesised to be superior
to a plain radiograph method in the assessment of polyethylene (PE)
wear. A phantom device was constructed to simulate three-dimensional
(3D) PE wear. Images were obtained consecutively for each simulated
wear position for each modality. Three commercially available packages
were evaluated: model-based RSA using laser-scanned cup models (MB-RSA),
model-based RSA using computer-generated elementary geometrical
shape models (EGS-RSA), and PolyWare. Precision (95% repeatability
limits) and accuracy (Root Mean Square Errors) for two-dimensional
(2D) and 3D wear measurements were assessed.Objectives
Methods
A variety of radiological methods of measuring
version of the acetabular component after total hip replacement (THR)
have been described. The aim of this study was to evaluate the reliability
and validity of six methods (those of Lewinnek; Widmer; Hassan et
al; Ackland, Bourne and Uhthoff; Liaw et al; and Woo and Morrey)
that are currently in use. In 36 consecutive patients who underwent
THR, version of the acetabular component was measured by three independent
examiners on plain radiographs using these six methods and compared
with measurements using CT scans. The intra- and interobserver reliabilities
of each measurement were estimated. All measurements on both radiographs
and CT scans had excellent intra- and interobserver reliability
and the results from each of the six methods correlated well with
the CT measurements. However, measurements made using the methods
of Widmer and of Ackland, Bourne and Uhthoff were significantly
different from the CT measurements (both p <
0.001), whereas
measurements made using the remaining four methods were similar
to the CT measurements. With regard to reliability and convergent
validity, we recommend the use of the methods described by Lewinnek,
Hassan et al, Liaw et al and Woo and Morrey for measurement of version
of the acetabular component.
We determined the midterm survival, incidence
of peri-prosthetic fracture and the enhancement of the width of
the femur when combining struts and impacted bone allografts in
24 patients (25 hips) with severe femoral bone loss who underwent
revision hip surgery. The pre-operative diagnosis was aseptic loosening
in 16 hips, second-stage reconstruction in seven, peri-prosthetic
fracture in one and stem fracture in one hip. A total of 14 hips
presented with an Endoklinik grade 4 defect and 11 hips a grade
3 defect. The mean pre-operative Merle D’Aubigné and Postel score
was 5.5 points (1 to 8). The survivorship was 96% (95% confidence interval 72 to 98) at
a mean of 54.5 months (36 to 109). The mean functional score was
17.3 points (16 to 18). One patient in which the strut did not completely
bypass the femoral defect was further revised using a long cemented
stem due to peri-prosthetic fracture at six months post-operatively.
The mean subsidence of the stem was 1.6 mm (1 to 3). There was no
evidence of osteolysis, resorption or radiolucencies during follow-up
in any hip. Femoral width was enhanced by a mean of 41% (19% to
82%). A total of 24 hips had partial or complete bridging of the
strut allografts. This combined biological method was associated with a favourable
survivorship, a low incidence of peri-prosthetic fracture and enhancement
of the width of the femur in revision total hip replacement in patients
with severe proximal femoral bone loss.
Satisfactory primary wound healing following
total joint replacement is essential. Wound healing problems can
have devastating consequences for patients. Assessment of their healing
capacity is useful in predicting complications. Local factors that
influence wound healing include multiple previous incisions, extensive
scarring, lymphoedema, and poor vascular perfusion. Systemic factors
include diabetes mellitus, inflammatory arthropathy, renal or liver
disease, immune compromise, corticosteroid therapy, smoking, and
poor nutrition. Modifications in the surgical technique are necessary
in selected cases to minimise potential wound complications. Prompt
and systematic intervention is necessary to address any wound healing
problems to reduce the risks of infection and other potential complications. Cite this article:
The technique of femoral cement-in-cement revision
is well established, but there are no previous series reporting its
use on the acetabular side at the time of revision total hip replacement.
We describe the technique and report the outcome of 60 consecutive
acetabular cement-in-cement revisions in 59 patients at a mean follow-up
of 8.5 years (5 to 12). All had a radiologically and clinically
well-fixed acetabular cement mantle at the time of revision. During
the follow-up 29 patients died, but no hips were lost to follow-up.
The two most common indications for acetabular revision were recurrent
dislocation (46, 77%) and to complement femoral revision (12, 20%). Of the 60 hips, there were two cases of aseptic loosening of
the acetabular component (3.3%) requiring re-revision. No other
hip was clinically or radiologically loose (96.7%) at the latest
follow-up. One hip was re-revised for infection, four for recurrent
dislocation and one for disarticulation of a constrained component.
At five years the Kaplan-Meier survival rate was 100% for aseptic
loosening and 92.2% (95% CI 84.8 to 99.6), with revision for any cause
as the endpoint. These results support the use of cement-in-cement revision on
the acetabular side in appropriate cases. Theoretical advantages
include preservation of bone stock, reduced operating time, reduced
risk of complications and durable fixation.
We prospectively followed 191 consecutive collarless
polished tapered (CPT) femoral stems, implanted in 175 patients
who had a mean age at operation of 64.5 years (21 to 85). At a mean
follow-up of 15.9 years (14 to 17.5), 86 patients (95 hips) were
still alive. The fate of all original stems is known. The 16-year
survivorship with re-operation for any reason was 80.7% (95% confidence
interval 72 to 89.4). There was no loss to follow-up, with clinical
data available on all 95 hips and radiological assessment performed
on 90 hips (95%). At latest follow-up, the mean Harris hip score
was 78 (28 to 100) and the mean Oxford hip score was 36 (15 to 48).
Stems subsided within the cement mantle, with a mean subsidence
of 2.1 mm (0.4 to 19.2). Among the original cohort, only one stem
(0.5%) has been revised due to aseptic loosening. In total seven
stems were revised for any cause, of which four revisions were required
for infection following revision of the acetabular component. A
total of 21 patients (11%) required some sort of revision procedure;
all except three of these resulted from failure of the acetabular
component. Cemented acetabular components had a significantly lower
revision burden (three hips, 2.7%) than Harris Galante uncemented
components (17 hips, 21.8%) (p <
0.001). The CPT stem continues to provide excellent radiological and
clinical outcomes at 15 years following implantation. Its results
are consistent with other polished tapered stem designs.
We describe the results of 81 consecutive revision
total hip replacements with impaction grafting in 79 patients using
a collared polished chrome–cobalt stem, customised in length according
to the extent of distal bone loss. Our hypothesis was that the features
of this stem would reduce the rate of femoral fracture and subsidence
of the stem. The mean follow-up was 12 years (8 to 15). No intra-operative
fracture or significant subsidence occurred. Only one patient suffered
a post-operative diaphyseal fracture, which was associated with
a fall. All but one femur showed incorporation of the graft. No
revision for aseptic loosening was recorded. The rate of survival of the femoral component at 12 years, using
further femoral revision as the endpoint, was 100% (95% confidence
interval (CI) 95.9 to 100), and at nine years using re-operation
for any reason as the endpoint, was 94.6% (95% CI 92.0 to 97.2). These results suggest that a customised cemented polished stem
individually adapted to the extent of bone loss and with a collar
may reduce subsidence and the rate of fracture while maintaining
the durability of the fixation.
We report a case of a male patient presenting
with bilateral painful but apparently well-positioned and -fixed
large-diameter metal-on-metal hip replacements four years post-operatively.
Multiple imaging modes revealed a thick-walled, cystic expansile
mass in communication with the hip joint (a pseudotumour). Implant
retrieval analysis and tissue culture eliminated high bearing wear
or infection as causes for the soft-tissue reaction, but noted marked corrosion
of the modular neck taper adaptor and corrosion products in the
tissues. Therefore, we believe corrosion products from the taper
caused by mismatch of the implant components led to pseudotumour
formation requiring revision.
The outcome of total knee replacement (TKR) using
components designed to increase the range of flexion is not fully
understood. The short- to mid-term risk of aseptic revision in high
flexion TKR was evaluated. The endpoint of the study was aseptic
revision and the following variables were investigated: implant
design (high flexion In a cohort of 64 000 TKRs, high flexion components were used
in 8035 (12.5%). The high flexion knees with tibial liners of thickness
>
14 mm had a density of revision of 1.45/100 years of observation,
compared with 0.37/100 in non-high flexion TKR with liners ≤ 14
mm thick. Relative to a standard fixed PS TKR, the NexGen (Zimmer,
Warsaw, Indiana) Gender Specific Female high flexion fixed PS TKR
had an increased risk of revision (hazard ratio (HR) 2.27 (95% confidence
interval (CI) 1.48 to 3.50)), an effect that was magnified when
a thicker tibial insert was used (HR 8.10 (95% CI 4.41 to 14.89)). Surgeons should be cautious when choosing high flexion TKRs,
particularly when thicker tibial liners might be required. Cite this article:
This study compared the primary stability of two commercially
available acetabular components from the same manufacturer, which
differ only in geometry; a hemispherical and a peripherally enhanced
design (peripheral self-locking (PSL)). The objective was to determine
whether altered geometry resulted in better primary stability. Acetabular components were seated with 0.8 mm to 2 mm interference
fits in reamed polyethylene bone substrate of two different densities
(0.22 g/cm3 and 0.45 g/cm3). The primary stability
of each component design was investigated by measuring the peak
failure load during uniaxial pull-out and tangential lever-out tests.Objective
Methods
Louis Pasteur once said that: “Fortune favours
the prepared mind.” As one of the great scientists who contributed
to the fight against infection, he emphasised the importance of
being prepared at all times to recognise infection and deal with
it. Despite the many scientific discoveries and technological advances,
such as the advent of antibiotics and the use of sterile techniques,
infection continues to be a problem that haunts orthopaedic surgeons
and inflicts suffering on patients. The medical community has implemented many practices with the
intention of preventing infection and treating it effectively when
it occurs. Although high-level evidence may support some of these
practices, many are based on little to no scientific foundation.
Thus, around the world, there is great variation in practices for
the prevention and management of periprosthetic joint infection. This paper summaries the instigation, conduct and findings of
a recent International Consensus Meeting on Surgical Site and Periprosthetic
Joint Infection. Cite this article:
An 81-year-old woman presented with a fracture
in the left femur. She had well-fixed bilateral hip replacements
and had received long-term bisphosphonate treatment. Prolonged bisphosphonate
use has been recently linked with atypical subtrochanteric and diaphyseal
femoral fractures. While the current definition of an atypical fracture
of the femur excludes peri-prosthetic fractures, this case suggests
that they do occur and should be considered in patients with severe
osteopenia. Union of the fracture followed cessation of bisphosphonates
and treatment with teriparatide. Thus, this case calls into question
whether prophylactic intramedullary nailing is sufficient alone
to treat early or completed atypical femoral fractures.
In order to compare the effect of oral apixaban
(a factor Xa inhibitor) with subcutaneous enoxaparin on major venous
thromboembolism and major and non-major clinically relevant bleeding
after total knee and hip replacement, we conducted a pooled analysis
of two previously reported double-blind randomised studies involving 8464
patients. One group received apixaban 2.5 mg twice daily (plus placebo
injection) starting 12 to 24 hours after operation, and the other
received enoxaparin subcutaneously once daily (and placebo tablets)
starting 12 hours (± 3) pre-operatively. Each regimen was continued
for 12 days ( Apixaban 2.5 mg twice daily is more effective than enoxaparin
40 mg once daily without increased bleeding.
Aims. Day-case knee and hip replacement, in which patients are discharged on the day of surgery, has been gaining popularity during the last two decades, and particularly since the COVID-19 pandemic. This systematic review presents the evidence comparing day-case to inpatient-stay surgery. Methods. A systematic literature search was performed of MEDLINE, Embase, and grey literature databases to include all studies which compare day-case with inpatient knee and hip replacement. Meta-analyses were performed where appropriate using a random effects model. The protocol was registered prospectively (PROSPERO CRD42023392811). Results. A total of 38 studies were included, with a total of 83,888 day-case procedures. The studies were predominantly from the USA and Canada, observational, and with a high risk of bias. Day-case patients were a mean of 2.08 years younger (95% CI 1.05 to 3.12), were more likely to be male (odds ratio (OR) 1.3 (95% CI 1.19 to 1.41)), and had a lower mean BMI and American Society of Anesthesiologists grades compared with inpatients. Overall, day-case surgery was associated with significantly lower odds of readmission (OR 0.83 (95% CI 0.73 to 0.96); p = 0.009), subsequent emergency department attendance (OR 0.62 (95% CI 0.48 to 0.79); p < 0.001), and complications (OR 0.7 (95% CI 0.55 to 0.89) p = 0.004), than inpatient surgery. There were no significant differences in the rates of reoperation or mortality. The overall rate of successful same-day discharge for day-case surgery was 85% (95% CI 81 to 88). Patient-reported outcome measures and cost-effectiveness were either equal or favoured day-case. Conclusion. Within the limitations of the literature, in particular the substantial risk of selection bias, the outcomes following day-case knee and hip replacement appear not to be inferior to those following an inpatient stay. The evidence is more robust for unicompartmental knee replacement (UKR) than for total knee replacement (TKR) or total hip replacement (THR). The rate of successful same-day discharge is highest in UKR, followed by TKR and comparatively lower in
Few studies have examined the order in which
a spinal osteotomy and total hip replacement (THR) are to be performed
for patients with ankylosing spondylitis. We have retrospectively
reviewed 28 consecutive patients with ankylosing spondylitis who
underwent both a spinal osteotomy and a
We investigated whether simultaneous bilateral sequential total hip replacement (THR) would increase the rate of mortality and complications compared with unilateral
We evaluated the short-term of 0 to 90 days and the longer term, up to 12.7 years, mortality for patients undergoing primary total hip replacement (THR) in Denmark in comparison to the general population. Through the Danish Hip Arthroplasty Registry we identified all primary THRs undertaken for osteoarthritis between 1 January 1995 and 31 December 2006. Each patient (n = 44 558) was matched at the time of surgery with three people from the general population (n = 133 674). We estimated mortality rates and mortality rate ratios with 95% confidence intervals for
Objectives. We aimed first to summarise minimal clinically important differences
(MCIDs) after total hip (THR) or knee replacement (TKR) in health-related
quality of life (HRQoL), measured using the Short-Form 36 (SF-36).
Secondly, we aimed to improve the precision of MCID estimates by
means of meta-analysis. Methods. We conducted a systematic review of English and non-English articles
using MEDLINE, the Cochrane Controlled Trials Register (1960–2011),
EMBASE (1991–2011), Web of Science, Academic Search Premier and
Science Direct. Bibliographies of included studies were searched
in order to find additional studies. Search terms included MCID
or minimal clinically important change,
Comparison of the safety and efficacy of bilateral simultaneous total hip replacement (THR) and that of staged bilateral
Intact abductors of the hip play a crucial role
in preventing limping and are known to be damaged through the direct lateral
approach. The extent of trauma to the abductors after revision total
hip replacement (THR) is unknown. The aim of this prospective study
was to compare the pre- and post-operative status of the gluteus
medius muscle after revision
We examined the one-year risk of symptomatic
venous thromboembolism (VTE) following primary total hip replacement
(THR) among Danish patients and a comparison cohort from the general
population. From the Danish Hip Arthroplasty Registry we identified
all primary THRs performed in Denmark between 1995 and 2010 (n =
85 965). In all, 97% of patients undergoing
Objectives. Electronic forms of data collection have gained interest in recent
years. In orthopaedics, little is known about patient preference
regarding pen-and-paper or electronic questionnaires. We aimed to
determine whether patients undergoing total hip (THR) or total knee
replacement (TKR) prefer pen-and-paper or electronic questionnaires
and to identify variables that predict preference for electronic
questionnaires. Methods. We asked patients who participated in a multi-centre cohort study
investigating improvement in health-related quality of life (HRQoL)
after
Dysplasia of the hip, hypotonia, osteopenia,
ligamentous laxity, and mental retardation increase the complexity
of performing and managing patients with Down syndrome who require
total hip replacement (THR). We identified 14 patients (six males,
eight females, 21 hips) with Down syndrome and degenerative disease
of the hip who underwent
Early total hip replacement (THR) for acetabular
fractures offers accelerated rehabilitation, but a high risk of heterotopic
ossification (HO) has been reported. The purpose of this study was
to evaluate the incidence of HO, its associated risk factors and
functional impact. A total of 40 patients with acetabular fractures
treated with a
The aim of this study was to perform a cost–utility
analysis of total hip (THR) and knee replacement (TKR). Arthritis is
a disabling condition that leads to long-term deterioration in quality
of life. Total joint replacement, despite being one of the greatest
advances in medicine of the modern era, has recently come under
scrutiny. The National Health Service (NHS) has competing demands,
and resource allocation is challenging in times of economic restraint. Patients
who underwent
The purpose of this study was to compare the
amount of acetabular bone removed during hip resurfacing (HR) and cementless
total hip replacement (THR), after controlling for the diameter
of the patient’s native femoral head. Based on a power analysis,
64 consecutive patients (68 hips) undergoing HR or
In this prospective study a total of 80 consecutive
Chinese patients with Crowe type I or II developmental dysplasia of
the hip were randomly assigned for hip resurfacing arthroplasty
(HRA) or total hip replacement (THR). Three patients assigned to HRA were converted to
Patients who have undergone total hip or knee replacement (THR and TKR, respectively) are at high risk of venous thromboembolism. We aimed to determine the time courses of both the incidence of venous thromboembolism and effective prophylaxis. Patients with elective primary
The aim of this study was to analyse the functional outcome after a displaced intracapsular fracture of the femoral neck in active patients aged over 70 years without osteoarthritis or rheumatoid arthritis of the hip, randomised to receive either a hemiarthroplasty or a total hip replacement (THR). We studied 252 patients of whom 47 (19%) were men, with a mean age of 81.1 years (70.2 to 95.6). They were randomly allocated to be treated with either a cemented hemiarthroplasty (137 patients) or cemented
The Oxford hip and knee scores (OHS and OKS)
are validated patient-reported outcome measures used in patients undergoing
total hip replacement (THR), hip resurfacing (HR), total knee replacement
(TKR) and unicompartmental knee replacement (UKR). We analysed the
absolute OHS and OKS and change in scores following
Our aim was to determine the success rate of repeated debridement and two-stage cementless revision arthroplasty according to the type of infected total hip replacement (THR). We enrolled 294 patients (294 hips) with an infected
The April 2012 Hip &
Pelvis Roundup. 360. looks at osteoporotic hip fractures, retrotrochanteric pain, fibrin adhesive and reattachment of articular cartilage, autologous bone marrow mononuclear cells and avascular necrosis, bearing surfaces, stability after
The purpose of this study was to evaluate whether concerns about the release of metal ions in metal-on-metal total hip replacements (THR) should be extended to patients with metal-bearing total disc replacements (TDR). Cobalt and chromium levels in whole blood and serum were measured in ten patients with a single-level TDR after a mean follow-up of 34.5 months (13 to 61) using inductively-coupled plasma mass spectrometry. These metal ion levels were compared with pre-operative control levels in 81 patients and with metal ion levels 12 months after metal-on-metal
This study compared the demographic, clinical and patient-reported outcomes after total hip replacement (THR) and Birmingham Hip Resurfacing (BHR) carried out by a single surgeon. Patients completed a questionnaire that included the WOMAC, SF-36 scores and comorbid medical conditions. Data were collected before operation and one year after. The outcome scores were adjusted for age, gender, comorbid conditions and, at one year, for the pre-operative scores. There were 214 patients with a
A total of 219 hips in 192 patients aged between
18 and 65 years were randomised to 28-mm metal-on-metal uncemented
total hip replacements (THRs, 107 hips) or hybrid hip resurfacing
(HR, 112 hips). At a mean follow-up of eight years (6.6 to 9.3)
there was no significant difference between the
In this retrospective study we evaluated the
proficiency of shelf autograft in the restoration of bone stock
as part of primary total hip replacement (THR) for hip dysplasia,
and in the results of revision arthroplasty after failure of the primary
arthroplasty. Of 146 dysplastic hips treated by
Cut-off values with highest sensitivity and specificity
for the synovial fluid white cell and differential count will facilitate
the accurate diagnosis of infection in total knee (TKR) and total
hip replacement (THR). All patients undergoing revision TKR or THR
for suspected prosthetic joint infection between 2009 and 2011 at
two hospitals were identified. A total of 75 patients were included
with a mean age of 70.3 years (38 to 89). Synovial fluid was aspirated
pre-operatively and peri-prosthetic tissue samples were taken intra-operatively
for histological and microbiological examination. Receiver operating characteristic (ROC) plots were constructed
for white cell and differential counts in aspirated fluid. The optimal
cut-off for TKR and
We report the mid- to long-term (mean 20.3 years, 10 to 32.5) results of the Chiari pelvic osteotomy in patients with pre- to advanced stage osteoarthritis in dysplastic hips. We followed 163 Japanese patients (173 hips) with a mean age at surgery of 20 years (9 to 54). Overall, 124 hips (72%) had satisfactory results, with Harris hip scores ≥ 80. Satisfactory results were seen in 105 of 134 hips with pre- or early osteoarthritis (78%) and 19 of 39 hips with advanced osteoarthritis (49%). A total of 15 hips (9%) underwent a total hip replacement (THR) with a mean interval between osteotomy and
Degenerative problems of the hip in patients
with childhood and adult onset neuromuscular disorders can be challenging
to treat. Many orthopaedic surgeons are reluctant to recommend total
hip replacement (THR) for patients with underlying neuromuscular
disorders due to the perceived increased risks of dislocation, implant loosening,
and lack of information about the functional outcomes and potential
benefits of these procedures in these patients. Modular femoral
components and alternative bearings which facilitate the use of
large femoral heads, constrained acetabular components and perhaps
more importantly, a better understanding about the complications
and outcomes of
Using the General Practice Research Database, we examined the temporal changes in the rates of primary total hip (THR) and total knee (TKR) replacement, the age at operation and the female-to-male ratio between 1991 and 2006 in the United Kingdom. We identified 27 113 patients with
Surgical interventions consisting of internal
fixation (IF) or total hip replacement (THR) are required to restore
patient mobility after hip fractures. Conventionally, this decision
was based solely upon the degree of fracture displacement. However,
in the last ten years, there has been a move to incorporate patient
characteristics into the decision making process. Research demonstrating
that joint replacement renders superior functional results when compared
with IF, in the treatment of displaced femoral neck fractures, has
swayed the pendulum in favour of
Between 1999 and 2005, 10 264 patients who had undergone total hip replacement (THR) for subcapital fracture of the hip were compared with 76 520 in whom
We prospectively assessed the efficacy of a ceramic-on-metal
(CoM) hip bearing with uncemented acetabular and femoral components
in which cobalt–chrome acetabular liners and alumina ceramic heads
were used. The cohort comprised 94 total hip replacements (THRs) in 83 patients
(38 women and 45 men) with a mean age of 58 years (42 to 70). Minimum
follow-up was two years. All patients had pre- and post-operative
assessment using the Western Ontario and McMaster Universities osteoarthritis
index (WOMAC), Oxford hip score and Short-Form 12 scores. All showed
a statistically significant improvement from three months post-operatively
onwards (all p <
0.001). After two years whole blood metal ion levels were measured and
chromosomal analysis was performed. The levels of all metal ions
were elevated except vanadium. Levels of chromium, cobalt, molybdenum
and titanium were significantly higher in patients who underwent
bilateral
We have evaluated the extent to which diabetes affects the revision rate following total hip replacement (THR). Through the Danish Hip Arthroplasty Registry we identified all patients undergoing a primary
There have been comparatively few studies of the incidence of osteolysis and the survival of hybrid and cementless total hip replacements (THRs) in patients younger than 50 years of age. We prospectively reviewed 78 patients (109 hips) with a hybrid
The popularity of cementless total hip replacement
(THR) has surpassed cemented
We analysed data from the Oxford hip and knee questionnaires collected by the New Zealand Joint Registry at six months and five years after joint replacement, to determine if there was any relationship between the scores and the risk of early revision. Logistic regression of the six-month scores indicated that for every one-unit decrease in the Oxford score, the risk of revision within two years increased by 9.7% for total hip replacement (THR), 9.9% for total knee replacement (TKR) and 12.0% for unicompartmental knee replacement (UKR). Our findings showed that 70% of the revisions within two years for TKR and 67% for
Muscle atrophy has been demonstrated in patients suffering from osteoarthritis of the hip, but little is known about muscular recovery after total hip replacement (THR). A total of 20 patients with unilateral osteoarthritis of the hip were assessed before, six months and two years after
We investigated the incidence of soft-tissue
lesions after small head metal-on-metal total hip replacement (MoM THR).
Between December 1993 and May 1999, 149 patients (195 hips) underwent
primary cementless MoM
Direct anterior approaches to the hip have gained
popularity as a minimally invasive method when performing primary
total hip replacement (THR). A retrospective review of a single
institution joint registry was performed in order to compare patient
outcomes after
Although patients with a history of venous thromboembolism
(VTE) who undergo lower limb joint replacement are thought to be
at high risk of further VTE, the actual rate of recurrence has not
been reported. The purpose of this study was to identify the recurrence rate
of VTE in patients who had undergone lower limb joint replacement,
and to compare it with that of patients who had undergone a joint
replacement without a history of VTE. . From a pool of 6646 arthroplasty procedures (3344 TKR, 2907
Data on early morbidity and complications after
revision total hip replacement (THR) are limited. The aim of this nationwide
study was to describe and quantify early morbidity after aseptic
revision
Total hip replacement (THR) is a very common
procedure undertaken in up to 285 000 Americans each year. Patient
satisfaction with
We compared the rate of revision for instability
after total hip replacement (THR) when lipped and non-lipped acetabular
liners were used. We hypothesised that the use of a lipped liner
in a modular uncemented acetabular component reduces the risk of
revision for instability after primary
Large femoral heads have become popular in total
hip replacement (THR) as a method of reducing the risk of dislocation.
However, if large heads are used in ceramic-on-ceramic
A total of 31 patients, (20 women, 11 men; mean
age 62.5 years old; 23 to 81), who underwent conversion of a Girdlestone
resection-arthroplasty (RA) to a total hip replacement (THR) were
compared with 93 patients, (60 women, 33 men; mean age 63.4 years
old; 20 to 89), who had revision
