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Bone & Joint Open
Vol. 6, Issue 3 | Pages 291 - 297
7 Mar 2025
Zambito K Kushchayeva Y Bush A Pisani P Kushchayeva S Peters M Birch N

Aims

Assessment of bone health is a multifaceted clinical process, incorporating biochemical and diagnostic tests that should be accurate and reproducible. Dual-energy X-ray absorptiometry (DXA) is the reference standard for evaluation of bone mineral density, but has known limitations. Alternatives include quantitative CT (q-CT), MRI, and peripheral quantitative ultrasound (QUS). Radiofrequency echographic multispectrometry (REMS) is a new generation of ultrasound technology used for the assessment of bone mineral density (BMD) at axial sites that is as accurate as quality-assured DXA scans. It also provides an assessment of the quality of bone architecture. This will be of direct value and significance to orthopaedic surgeons when planning surgical procedures, including fracture fixation and surgery of the hip and spine, since BMD alone is a poor predictor of fracture risk.

Methods

The various other fixed-site technologies such as high-resolution peripheral q-CT (HR-pQCT) and MRI offer no further significant prognostic advantages in terms of assessing bone structure and BMD to predict fracture risk. QUS was the only widely adopted non-fixed imaging option for bone health assessment, but it is not considered adequately accurate to provide a quantitative assessment of BMD or provide a prediction of fracture risk. In contrast, REMS has a robust evidence base that demonstrates its equivalence to DXA in determining BMD at axial sites. Fracture prediction using REMS, combining the output of fragility information and BMD, has been established as more accurate than when using BMD alone.


Bone & Joint Research
Vol. 13, Issue 11 | Pages 647 - 658
12 Nov 2024
Li K Zhang Q

Aims

The incidence of limb fractures in patients living with HIV (PLWH) is increasing. However, due to their immunodeficiency status, the operation and rehabilitation of these patients present unique challenges. Currently, it is urgent to establish a standardized perioperative rehabilitation plan based on the concept of enhanced recovery after surgery (ERAS). This study aimed to validate the effectiveness of ERAS in the perioperative period of PLWH with limb fractures.

Methods

A total of 120 PLWH with limb fractures, between January 2015 and December 2023, were included in this study. We established a multidisciplinary team to design and implement a standardized ERAS protocol. The demographic, surgical, clinical, and follow-up information of the patients were collected and analyzed retrospectively.


Orthopaedic Proceedings
Vol. 105-B, Issue SUPP_16 | Pages 46 - 46
17 Nov 2023
Young M Birch N
Full Access

Abstract. Objective. This study assesses the prevalence of major and minor discordance between hip and spine T scores using Radiofrequency Echographic Multi-spectrometry (REMS). REMS is a novel technology that uses ultrasound and radiofrequency analysis to measure bone density and bone fragility at the hip and lumbar spine. The objective was to compare the results with the existing literature on Dual-Energy X-ray Absorptiometry (DEXA) the current “gold standard” for bone densitometry. REMS and DEXA have been shown to have similar diagnostic accuracy, however, REMS has less human input when carrying out the scan, therefore the rates of discordance might be expected to be lower than for DEXA. Discordance poses a risk of misclassification of patients’ bone health status, causing diagnostic ambiguity and potentially sub-optimal management decisions. Reduction of discordance rates therefore has the potential to significantly improve treatment and patient outcomes. Methods. Results from 1,855 patients who underwent REMS investigations between 2018 and 2022 were available. Minor discordance is defined as a difference of one World Health Organisation (WHO) diagnostic classification (Normal / Osteopenia or Osteopenia / Osteoporosis). Major discordance is defined as a difference of two WHO diagnostic classifications (Normal / Osteoporosis). The results were compared with reported DEXA discordance rates. Results. 1,732 individuals had both hip and spine T scores available for analysis. There were 267 cases of discordance. No instances of major discordance were observed. The minor discordance rate was 15.4%. 6.5% of the REMS scans with minor discordance showed > 1.0 standard deviation (SD) difference between the T scores of the hip and spine. 19.4% had differences of between 0.6 SD and 1.0 SD while 73.9% had ≤ 0.5 SD or less. In 24.5% of the cases of REMS discordance the hip T scores were greater than the spine and in 75.5% of cases the spine T score was greater than the hip. Conclusions. The current analysis is the largest of its kind. It demonstrates that REMS has an overall lower rate of discordance than reported DEXA rates. Major discordance rates with DEXA range from 2–17%, but REMS avoids many of the positioning problems and post-processing errors inherent in DEXA scanning, which might account for the absence of major discordance. Rates of minor discordance in DEXA scans range between 38–51%. The REMS minor discordance rate being much lower than these rates suggests that it has the potential to enhance diagnostic accuracy considerably. Most REMS discordance results showed ≤ 0.5 SD variance between the T scores of the two sites, indicating close correlation in the bone densitometry analysis. Most studies of DEXA discordant results confirm that spinal T scores are more often higher than at the hip. The REMS results concur with this observation. Considering the comparable accuracy rates that have been shown between REMS and DEXA, with its much lower discordance rate, REMS can potentially improve current medical practice and enhance patient care. Declaration of Interest. (b) declare that there is no conflict of interest that could be perceived as prejudicing the impartiality of the research reported:I declare that there is no conflict of interest that could be perceived as prejudicing the impartiality of the research project


Bone & Joint Research
Vol. 11, Issue 2 | Pages 91 - 101
1 Feb 2022
Munford MJ Stoddart JC Liddle AD Cobb JP Jeffers JRT

Aims

Unicompartmental and total knee arthroplasty (UKA and TKA) are successful treatments for osteoarthritis, but the solid metal implants disrupt the natural distribution of stress and strain which can lead to bone loss over time. This generates problems if the implant needs to be revised. This study investigates whether titanium lattice UKA and TKA implants can maintain natural load transfer in the proximal tibia.

Methods

In a cadaveric model, UKA and TKA procedures were performed on eight fresh-frozen knee specimens, using conventional (solid) and titanium lattice tibial implants. Stress at the bone-implant interfaces were measured and compared to the native knee.


Orthopaedic Proceedings
Vol. 103-B, Issue SUPP_4 | Pages 84 - 84
1 Mar 2021
Mobasheri A
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Sarcopenia is a progressive and generalized skeletal muscle disorder that involves loss of muscle mass and function. It is associated with increased adverse outcomes including falls, functional decline, frailty and mortality and affects 65% of people over the age of 65 more than half of people aged 80 and above. The factors that cause and worsen sarcopenia are categorised into two groups. The primary aetiological factor is ageing and the secondary factors include disease, physical inactivity, and poor nutrition. Sarcopenia is considered to be ‘primary' (or age-related) when no other specific cause is evident. However, a number of ‘secondary' factors may be present in addition to ageing. Sarcopenia can occur secondary to a systemic or inflammatory disease, including malignancy and organ failure. Physical inactivity is one of the major contributors to the development of sarcopenia, whether due to a sedentary lifestyle or to disease related immobility or disability. Furthermore, sarcopenia can develop as a result of inadequate protein consumption. Biomarkers are objective and quantifiable characteristics of physiological and pathophysiological processes. Biomarkers can be used to predict the development of sarcopenia in older susceptible adults and enable early interventions that can reduce the risk of physical disability, the co-morbidities associated with the loss of muscle mass and the poor health outcomes that result from sarcopenia. Non-invasive imaging technologies can be used as biomarkers to detect loss of skeletal muscle mass in sarcopenia include bone densitometry, computed tomography, ultrasound and magnetic resonance imaging. However, imaging requires sophisticated and expensive equipment that is not available in a resource poor setting. Therefore, markers of skeletal muscle strength and fitness and soluble biochemical markers in blood may be used as alternative biomarkers. Studies on sarcopenia have identified numerous soluble biochemical biomarkers. These biomarkers can be divided into two groups: “muscle-specific” and “non-muscle-specific” biomarkers. Since sarcopenia is associated with rapid skeletal muscle wasting, the skeletal muscle-specific isoform of troponin T may be considerate a useful biomarker of sarcopenia, since high troponin levels in blood are an expression of muscle wasting. Peptides derived from collagen type VI turnover may be potential biomarkers of sarcopenia. We have recently conducted a systematic review to summarize the data from recent mass-spectrometry based proteomic studies of the secretome of skeletal muscle cells in response to disease, exercise or metabolic stress in order to identify the proteins involved in muscle breakdown. Developing robust in vitro models for the study of sarcopenia using primary muscle cells is a high priority as is exploiting the in vitro models to understand catabolic and inflammatory processes and molecular mechanisms involved in sarcopenia. Co-cultures with adipose-derived and other cells may be used to screen for small molecules and biologicals capable of inhibiting the catabolic and inflammatory pathways involved in sarcopenia. This presentation reviews recent progress in this area and outlines opportunities for future research on sarcopenia


Orthopaedic Proceedings
Vol. 102-B, Issue SUPP_11 | Pages 54 - 54
1 Dec 2020
Kacmaz IE Egeli E Basa CD Zhamilov V
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Proximal femur fractures are common in the elderly population. The aim of this study was to determine the relationship between fracture type and proximal femoral geometric parameters. We retrospectively studied the electronic medical records of 85 elderly patients over 60 years of age who were admitted to the orthopedic department with hip fractures between January 2016 and January 2018 in a training and research hospital in Turkey. Age, fracture site, gender, implant type and proximal femoral geometry parameters (neck shaft angle [NSA], center edge angle [CEA], femoral head diameter [FHD], femoral neck diameter [FND], femoral neck axial length [FNAL], hip axial length [HAL], and femoral shaft diameter [FSD]) were recorded. Patients with femoral neck fractures and femur intertrochanteric fractures were divided into two groups. The relationship between proximal femoral geometric parameters and fracture types was examined. SPSS 25.0 (IBM Corparation, Armonk, New York, United States) program was used to analyze the variables. Independent samples t test was used to compare the fracture types according to NSA, FHD, FND and FSD variables. A statistically significant difference was found in FSD (p=0,002) and age (p=0,019). FSD and age were found to be greater in intertrochanteric fractures than neck fractures. Gender, site, CEA, FNAL, HAL, NSA, FHD and FND parametres were not significantly different. In the literature, it is seen that different results have been reached in different studies. In a study conducted in the Chinese population, a significant difference was found between the two groups in NSA, CEA and FNAL measurements. In a study conducted in the Korean population, a significant difference was found only in NSA measurements. The FSD is generally associated with bone mineral densitometry in the literature and has been shown to be a risk factor for fracture formation. However, a study showing that there is a relationship between FSD and fracture type is not available in the literature. In this study; FSD was found to be higher in intertrochanteric fractures (p = 0.002). However, for the clinical significance of this difference, we think that larger patient series and biomechanical studies are needed


The Bone & Joint Journal
Vol. 101-B, Issue 11 | Pages 1416 - 1422
1 Nov 2019
Rohilla R Sharma PK Wadhwani J Rohilla S Beniwal R Singh R Devgan A

Aims

In this randomized study, we aimed to compare quality of regenerate in monolateral versus circular frame fixation in 30 patients with infected nonunion of tibia.

Patients and Methods

Both groups were comparable in demographic and injury characteristics. A phantom (aluminium step wedge of increasing thickness) was designed to compare the density of regenerate on radiographs. A CT scan was performed at three and six months postoperatively to assess regenerate density. A total of 30 patients (29 male, one female; mean age 32.54 years (18 to 60)) with an infected nonunion of a tibial fracture presenting to our tertiary institute between June 2011 and April 2016 were included in the study.


Orthopaedic Proceedings
Vol. 100-B, Issue SUPP_10 | Pages 20 - 20
1 Jun 2018
Springer B
Full Access

Periprosthetic fractures around the femur during and after total hip arthroplasty (THA) remain a common mode of failure. It is important therefore to recognise those factors that place patients at increased risk for development of this complication. Prevention of this complication, always trumps treatment. Risk factors can be stratified into: 1. Patient related factors; 2. Host bone and anatomical considerations; 3. Procedural related factors; and 4. Implant related factors. Patient Factors. There are several patient related factors that place patients at risk for development of a periprosthetic fracture during and after total hip arthroplasty. Metabolic bone disease, particularly osteoporosis increases the risk of periprosthetic fracture. In addition, patients that smoke, have long term steroid use or disuse, osteopenia due to inactivity should be identified. A metabolic bone work up and evaluation of bone mineralization with a bone densitometry test can be helpful in identifying and implementing treatment prior to THA. Pre-operative Host Bone and Anatomic Considerations. In addition to metabolic bone disease the “shape of the bone” should be taken into consideration as well. Dorr has described three different types of bone morphology (Dorr A, B, C), each with unique characteristics of size and shape. It is important to recognise that not one single cementless implant may fit all bone types. The importance of templating a THA prior to surgery cannot be overstated. Stem morphology must be appropriately matched to patient anatomy. Today, several types of cementless stem designs exist with differing shape and areas of fixation. It is important to understand via pre-operative templating which stem works best in what situation. Procedural Related Factors. There has been a resurgence in interest in the varying surgical approaches to THA. While the validity and benefits of each surgical approach remains a point of debate, each approach carries with it its own set of risks. Several studies have demonstrated increased risk of periprosthetic fractures during THA with the use of the direct anterior approach. Risk factors for increased risk of periprosthetic fracture may include obesity, bone quality and stem design. Implant Related Factors. As mentioned there are several varying cementless implant shapes and sizes that can be utilised. There is no question that cementless fixation remains the most common mode of fixation in THA. However, one must not forget the role of cemented fixation in THA. Published results on long term fixation with cemented stems are comparable if not exceeding those of press fit fixation. In addition, the literature is clear that cemented fixation in the elderly hip fracture patient population is associated with a lower risk of periprosthetic fracture and lower risk of revision. The indication and principles of cemented stem fixation in THA should not be forgotten


Bone & Joint Research
Vol. 7, Issue 1 | Pages 6 - 11
1 Jan 2018
Wong RMY Choy MHV Li MCM Leung K K-H. Chow S Cheung W Cheng JCY

Objectives

The treatment of osteoporotic fractures is a major challenge, and the enhancement of healing is critical as a major goal in modern fracture management. Most osteoporotic fractures occur at the metaphyseal bone region but few models exist and the healing is still poorly understood. A systematic review was conducted to identify and analyse the appropriateness of current osteoporotic metaphyseal fracture animal models.

Materials and Methods

A literature search was performed on the Pubmed, Embase, and Web of Science databases, and relevant articles were selected. A total of 19 studies were included. Information on the animal, induction of osteoporosis, fracture technique, site and fixation, healing results, and utility of the model were extracted.


Bone & Joint Research
Vol. 5, Issue 6 | Pages 269 - 275
1 Jun 2016
Ono Y Woodmass JM Nelson AA Boorman RS Thornton GM Lo IKY

Objectives

This study evaluated the mechanical performance, under low-load cyclic loading, of two different knotless suture anchor designs: sutures completely internal to the anchor body (SpeedScrew) and sutures external to the anchor body and adjacent to bone (MultiFIX P).

Methods

Using standard suture loops pulled in-line with the rotator cuff (approximately 60°), anchors were tested in cadaveric bone and foam blocks representing normal to osteopenic bone. Mechanical testing included preloading to 10 N and cyclic loading for 500 cycles from 10 N to 60 N at 60 mm/min. The parameters evaluated were initial displacement, cyclic displacement and number of cycles and load at 3 mm displacement relative to preload. Video recording throughout testing documented the predominant source of suture displacement and the distance of ‘suture cutting through bone’.


The Bone & Joint Journal
Vol. 97-B, Issue 10 | Pages 1358 - 1363
1 Oct 2015
Hooper N Snell D Hooper G Maxwell R Frampton C

This study reports on the first 150 consecutive Oxford cementless unicompartmental knee arthroplasties (UKA) performed in an independent centre (126 patients). All eligible patients had functional scores (Oxford knee score and high activity arthroplasty score) recorded pre-operatively and at two- and five-years of follow-up. Fluoroscopically aligned radiographs were taken at five years and analysed for any evidence of radiolucent lines (RLLs), subsidence or loosening. The mean age of the cohort was 63.6 years (39 to 86) with 81 (53.1%) males. Excellent functional scores were maintained at five years and there were no progressive RLLs demonstrated on radiographs. Two patients underwent revision to a total knee arthroplasty giving a revision rate of 0.23/100 (95% confidence interval 0.03 to 0.84) component years with overall component survivorship of 98.7% at five years. There were a further four patients who underwent further surgery on the same knee, two underwent bearing exchanges for dislocation and two underwent lateral UKAs for disease progression. This was a marked improvement from other UKAs reported in New Zealand Joint Registry data and supports the designing centre’s early results.

Cite this article: Bone Joint J 2015;97-B:1358–63.


The Bone & Joint Journal
Vol. 95-B, Issue 11 | Pages 1480 - 1483
1 Nov 2013
Hooper GJ Gilchrist N Maxwell R March R Heard A Frampton C

We studied the bone mineral density (BMD) and the bone mineral content (BMC) of the proximal tibia in patients with a well-functioning uncemented Oxford medial compartment arthroplasty using the Lunar iDXA bone densitometer. Our hypothesis was that there would be decreased BMD and BMC adjacent to the tibial base plate and increased BMD and BMC at the tip of the keel.

There were 79 consecutive patients (33 men, 46 women) with a mean age of 65 years (44 to 84) with a minimum two-year follow-up (mean 2.6 years (2.0 to 5.0)) after unilateral arthroplasty, who were scanned using a validated standard protocol where seven regions of interest (ROI) were examined and compared with the contralateral normal knee. All had well-functioning knees with a mean Oxford knee score of 43 (14 to 48) and mean Knee Society function score of 90 (20 to 100), showing a correlation with the increasing scores and higher BMC and BMD values in ROI 2 in the non-implanted knee relative to the implanted knee (p = 0.013 and p = 0.015, respectively).

The absolute and percentage changes in BMD and BMC were decreased in all ROIs in the implanted knee compared with the non-implanted knee, but this did not reach statistical significance. Bone loss was markedly less than reported losses with total knee replacement.

There was no significant association with side, although there was a tendency for the BMC to decrease with age in men. The BMC was less in the implanted side relative to the non-implanted side in men compared with women in ROI 2 (p = 0.027), ROI 3 (p = 0.049) and ROI 4 (p = 0.029).

The uncemented Oxford medial compartment arthroplasty appears to allow relative preservation of the BMC and BMD of the proximal tibia, suggesting that the implant acts more physiologically than total knee replacement. Peri-prosthetic bone loss is an important factor in assessing long-term implant stability and survival, and the results of this study are encouraging for the long-term outcome of this arthroplasty.

Cite this article: Bone Joint J 2013;95-B:1480–3.


The Bone & Joint Journal
Vol. 95-B, Issue 11 | Pages 1514 - 1520
1 Nov 2013
D’Agostino P Barbier O

The osteoinductive properties of demineralised bone matrix have been demonstrated in animal studies. However, its therapeutic efficacy has yet to be proven in humans. The clinical properties of AlloMatrix, an injectable calcium-based demineralised bone matrix allograft, were studied in a prospective randomised study of 50 patients with an isolated unstable distal radial fracture treated by reduction and Kirschner (K-) wire fixation. A total of 24 patients were randomised to the graft group (13 men and 11 women, mean age 42.3 years (20 to 62)) and 26 to the no graft group (8 men and 18 women, mean age 45.0 years (17 to 69)).

At one, three, six and nine weeks, and six and 12 months post-operatively, patients underwent radiological evaluation, assessments for range of movement, grip and pinch strength, and also completed the Disabilities of Arm, Shoulder and Hand questionnaire. At one and six weeks and one year post-operatively, bone mineral density evaluations of both wrists were performed.

No significant difference in wrist function and speed of recovery, rate of union, complications or bone mineral density was found between the two groups. The operating time was significantly higher in the graft group (p = 0.004). Radiologically, the reduction parameters remained similar in the two groups and all AlloMatrix extraosseous leakages disappeared after nine weeks.

This prospective randomised controlled trial did not demonstrate a beneficial effect of AlloMatrix demineralised bone matrix in the treatment of this category of distal radial fractures treated by K-wire fixation.

Cite this article: Bone Joint J 2013;95-B:1514–20.


Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_27 | Pages 29 - 29
1 Jul 2013
Harrison W Harrison D
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Total disc replacement (TDR) is the gold standard for lumbar degenerative disc disease in selected patient groups. Traditional TDR designs benefit from a wealth of literature and use a polyethylene inlay pseudo-disc between two metal endplates. There is scarce literature for novel monomodular implants that form an artificial construct of woven annulus and central nucleus, providing physiological motion preservation. The aim was to compare the evolving changes to radiological position between monomodular and traditional implants and assess the relationship of migration with bone densitometry. This retrospective series of consecutive patients undergoing TDR under a single surgeon recorded demographics, co-morbidities, previous surgery and clinical outcomes. Measurements of endplate subsidence, lordosis and spondylolisthesis taken from weight-bearing erect x-rays at 0, 3, 6 and 12 months. Radiological outcomes were compared against CT bone densitometry. 33 monomodular and 13 traditional implants. Mean age 40 years. All patients had degenerative disc disease. Monomodular and traditional implants were as likely to develop lordosis (p=0.32), endplate subsidence (p=0.78) or spondylolisthesis (p=0.98). Comparison between endplate subsidence and low bone densitometry were insignificant (p=0.47). Developing lordosis in the monomodular implant was related to low bone density; mean 134vs.184mg/cm. 3. (p=0.018). Three monomodular implants developed a posterior hinge after migrating into lordosis. One traditional implant dislocated, requiring emergency fusion. Radiological outcomes are comparable between traditional and monomodular implants. The larger endplate-footprint of the monomodular implant did reduce subsidence. Monomodular implants pivoting on a posterior hinge may fail early. Bone densitometry may identify patients who will drift into lordosis


Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_15 | Pages 55 - 55
1 Mar 2013
Di Giunta A Romano AM Susanna M Marcello Z
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Introduction. The following study start from an idea of the evaluation of the osteointegration in the bone cage of the Equinoxe Reverse shoulder prosthesis. The aim of the study is to assess the values of Bone Mineral Density (BMD) in periprosthetic areas, in patients undergoing shoulder arthroplasty with implants of the Equinoxe system by Excatech, Inc. To better understand the steps of osteointegration time of the bone cage with the glenoid. The objectives of the work are not only expanded to the value of osteointegration, but could also be useful for the evaluation of both mechanical and septic loosening of the stem of the glenoid. Materials and Methods. In the period from November 2011 to May 2012, 15 patients were evaluated. All patients were subjected to bone densitometry type of DXA within the first 15 days after surgery and at 3 months after surgery. The patients are all part of a homogeneous group for anatomical glenoid. Were excluded from the study all patients who were no significant alterations of the head and the glenoid. The acquisitions were performed with the patient in an oblique position, with limb in a neutral position, in order to obtain images in the coronal plane “true” of the joint. Were subsequently calculated values of BMD is around the stem with the 7 areas used by Gruen for the hip prosthesis and peripherally to the central peg using 3 areas, superiorly, medially and inferiorly to the same. Results. The values obtained showed a significant increase in the time of bone density peripherally to the central peg demonstrating a significant osteointegration. Being a prospective study these values will be integrated with new acquisition DXA to 6, 9, 12 months, 2, 3 and 5 years. Conclusions. Although preliminary, through our study it was possible to obtain the standard values of BMD in patients with prosthetic replacement has been successful. These BMD values represent a standard of reference for the physiological osseointegration; in the future must be evaluated for their variation in patients with prosthetic loosening and / or with infectious processes, in order to allow an early diagnosis of these diseases by studying DXA. Also in future studies BMD values obtained by us of the Equinoxe prosthesis can be compared with those obtained in other models of the shoulder prosthesis to detect any advantages or disadvantages in terms of osteointegration


The Journal of Bone & Joint Surgery British Volume
Vol. 94-B, Issue 10 | Pages 1313 - 1320
1 Oct 2012
Middleton RG Shabani F Uzoigwe CE AS Moqsith M Venkatesan M

Osteoporosis is common and the health and financial cost of fragility fractures is considerable. The burden of cardiovascular disease has been reduced dramatically by identifying and targeting those most at risk. A similar approach is potentially possible in the context of fragility fractures. The World Health Organization created and endorsed the use of FRAX, a fracture risk assessment tool, which uses selected risk factors to calculate a quantitative, patient-specific, ten-year risk of sustaining a fragility fracture. Treatment can thus be based on this as well as on measured bone mineral density. It may also be used to determine at-risk individuals, who should undergo bone densitometry. FRAX has been incorporated into the national osteoporosis guidelines of countries in the Americas, Europe, the Far East and Australasia. The United Kingdom National Institute for Health and Clinical Excellence also advocates its use in their guidance on the assessment of the risk of fragility fracture, and it may become an important tool to combat the health challenges posed by fragility fractures


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXXVII | Pages 280 - 280
1 Sep 2012
Ravaglia F Leite M Barcellos T Cliquet Junior A
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Background. Though less common than in females, osteoporosis and osteoporosis-related fractures are not uncommon in males. Our primary objectives were (1) to compare the rates of osteoporosis and osteopenia in adult Brazilian males versus females, 55 years old and over and presenting for bone mineral densitometry (BMD); and (2) to compare males and females as to past osteoporosis screening and management. Methods. From our clinic population, we prospectively surveyed 343 males and 493 females, all at least 55 years of age, who had presented for BMD testing, to identify baseline demographic and clinical characteristics; risk factors for osteoporosis and osteoporotic fractures; overall osteoporosis and 10-year fracture risk; and evidence of prior assessment for and/or management/prevention of osteoporosis. Final osteoporosis risk was determined using the results of BMD testing and the FRAX® tool. Gender comparisons were performed using Pearson 2 analysis for nominal and ordinal variables, Student's t-tests for normally-distributed continuous variables, and Mann-Whitney U tests for non-normally-distributed continuous variables, with all tests 2-tailed and p=0.05 set as the threshold for statistical significance. Binary logistic regression was performed to identify predictors of prior hormonal treatment and BMD. Results. There were no differences in the rates of prior fracture, spinal fracture or long-bone fracture between the sexes, though women were more likely to have osteoporosis of the spine and femur, and had higher estimated risks of future osteoporotic fracture (all p < 0.001). Women also were significantly more likely to have received treatment for their osteoporosis (7.9 vs. 3.1%, p=0.004) and to have had prior BMD testing (80.7 vs. 16.2%, p < 0.001). Ten-year probabilities of hip fracture were 4.8% in males and 5.2% in females; and for a major osteoporotic fracture 5.6% and 24.3%., respectively (both p < 0.001). Age, gender and spinal osteoporosis predicted prior hormonal treatment; but gender was the only predictor of prior BMD, with males 95% less likely to have undergone prior testing than females. Conclusions. Despite similar past fracture rates, and lower but still appreciable future fracture risk, far fewer males than females had received prior screening or management of their osteoporosis


The Journal of Bone & Joint Surgery British Volume
Vol. 94-B, Issue 9 | Pages 1193 - 1201
1 Sep 2012
Hamilton HW Jamieson J

It is probable that both genetic and environmental factors play some part in the aetiology of most cases of degenerative hip disease. Geneticists have identified some single gene disorders of the hip, but have had difficulty in identifying the genetics of many of the common causes of degenerative hip disease. The heterogeneity of the phenotypes studied is part of the problem. A detailed classification of phenotypes is proposed. This study is based on careful documentation of 2003 consecutive total hip replacements performed by a single surgeon between 1972 and 2000. The concept that developmental problems may initiate degenerative hip disease is supported. The influences of gender, age and body mass index are outlined. Biomechanical explanations for some of the radiological appearances encountered are suggested. The body weight lever, which is larger than the abductor lever, causes the abductor power to be more important than body weight. The possibility that a deficiency in joint lubrication is a cause of degenerative hip disease is discussed. Identifying the phenotypes may help geneticists to identify genes responsible for degenerative hip disease, and eventually lead to a definitive classification.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XLIII | Pages 52 - 52
1 Sep 2012
Al-Maiyah M Rawlings D Chuter G Ramaskandhan J Siddique M
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Introduction. There is no published series described change in bone mineral density (BMD) after ankle replacement. We present the results of a prospective study examining the effect of total ankle replacement (TAR) upon local bone mineral density (BMD). Aim. To design a method and assess the effect of TAR loading on local ankle bones, by analysing the BMD of different area around ankle before and after Mobility TAR. Methods. 23 patients undergoing Mobility ankle arthroplasty for osteoarthritis had preoperative bone densitometry scans of the ankle, repeated at 1 and 2 years after surgery. BMD of 2 cm. 2. areas around ankle were measured. Pre- and postoperative data were compared. Results: Mean BMD within the lateral malleolus decreased significantly from 0.5g/cm. 2. to 0.42g/cm. 2. (17%, P > 0.01), at 1 & 2 years postoperatively. Mean BMD within medial malleolus decreased slightly from 0.67g/cm. 2. to 0.64 g/cm. 2. at the same period. However BMD at medial side metaphysic of tibia increased by 7%. There was little increase in BMD in tibia just proximal to implant and at talus. Discussion and Conclusion. Absence of stress shielding around distal tibia, just proximal to tibial component and talus indicates that ankle replacements implanted within the accepted limits for implant alignment, load distal tibia and talus. However, there was stress shielding over the lateral malleolus resulting in decreased BMD in lateral malleolus. Increase BMD at tibial metaphysis, proximal to medial malleolus indicates an increase in mechanical stress which may explain occasional postoperative stress fracture of medial malleolus or medial side ankle pain


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_III | Pages 17 - 17
1 Feb 2012
Hanusch B Fordham J Gregg P
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Introduction. The purpose of this study was to establish whether men and women with a fragility hip fracture were equally investigated and treated for osteoporosis. Methods. A retrospective review was carried out including 91 patients (48 females, 43 males) who were admitted with a fragility hip fracture between March 2003 and April 2004. Data about age, sex, investigations and medication were collected from the case notes, GP surgeries and the bone densitometry database. Investigations and treatment were compared with current guideline recommendations (SIGN 2003, NICE 2005). Data were analysed using SPSS Version 13.0. Results. According to the guidelines patients < 75 years of age should be investigated and patients > 75 years should be treated for osteoporosis. In our review 33% of women and only 8% of men < 75 years were investigated with a DEXA scan following their hip fracture (Fishers Exact Test, p = 0.32). In patients > 75 years 25% of women and only 6% of men were treated with bisphosphonates (Chi-square = 4.18, p < 0.05). There was also a statistically significant difference in overall treatment including bisphosphonates and calcium/vitamin D between the sexes (Chi-square = 6.81, p < 0.05). Conclusion. This study shows that there is clearly a need for improvement in secondary prevention of fragility fractures in both sexes, but men are significantly less likely to be investigated and treated than women. It is important to include recommendations for men in future guidelines and increase the awareness of male osteoporosis. This is of particular importance as men have a higher morbidity and mortality following hip fractures than women. Orthopaedic surgeons should therefore take on responsibility for these fracture patients and ensure that the process of secondary prevention is initiated