Hip resurfacing has grown rapidly since its introduction in the United States, as an alternative to total hip replacement in the younger, active patient. Some studies have suggested a steep learning curve and a higher complication rate when compared to THR. Existing studies have originated from the pioneering surgeons, using a specific type of resurfacing implant. The purpose of this study was to look at the experience of a single, non-inventor surgeon with the adoption of hip resurfacing, using 3 different implants. M&M. All consecutive hip resurfacings performed by the senior surgeon between 2004 and 2008 were included, providing a minimum 2 year followup period. 3 different implant types were used; 2 of these were used as part of the clinical trials, and 1 was used after US FDA approval. A total of 560 hip resurfacings were eligible for the study based upon a minimum of 2 year followup. Results. Nine revisions were performed in this cohort (1.6%). 2 were femoral conversions to endoprostheses for femoral neck fracture; 3 additional femoral conversions were done for osteonecrosis of the femoral head. 1 acetabular revision only was performed for malposition. 2 revisions to THR of both the acetabular and femoral components were done for acetabular loosening and excessive metal production (edge loading). There was 1 revision for metal hypersensitivity. Overall, the K-M survival curve is 98.1% at 4 years. There was no difference with regard to survival from additional surgery with regard to the different implant types. Radiographic signs of failure were also documented. In this cohort, 3 femoral and 1 acetabular components were identified to be radiographically loose, giving a K-M survival from clinical and radiographic failure to be 96.8% at 4 years. Discussion. Hip resurfacing can be adopted successfully with a low rate of reoperation, by the use of careful patient selection. A single surgeon's experience with 3 different types of implants demonstrated no difference in clinical results between the devices

Introduction. Over the past 30 years multiple wars and embargos have reduced healthcare resources, infrastructure, and staff in Iraq. Subsequently, there are a lack of physiotherapists to provide rehabilitation after an anterior cruciate ligament reconstruction (ACLR). The implementation of home-based rehabilitation programmes may provide a potential solution to this problem. This study, set in in the Kurdistan region of Iraq, describes the epidemiology and outcomes of anterior cruciate ligament reconstruction (ACLR) followed by home-based rehabilitation alone. Methods. A cohort observational study of patients aged ≥ 16 years with an ACL rupture who underwent an ACLR under a single surgeon. This was performed arthroscopically using a hamstring autograft (2 portal technique). Patients completed a home-based rehabilitation programme of appropriate simplicity for the home setting. The programme consisted of stretching, range of motion and strengthening exercises based on criterion rehabilitation progressions. A full description of the programme is provided at: . https://ngmvcharity.co.uk/. . Demographics, mechanisms of injury, operative findings, and outcome data (Lysholm, Tegner Activity Scale (TAS), and revision rates) were collected from 2016 to 2021. Data were analysed using descriptive statistics. Results. The cohort consisted of 545 patients (547 knees), 99.6% were male with a mean age of 27.8 years (SD 6.18 years). The mean time from diagnosis to surgery was 40.6 months (SD 40.3). Despite data attrition Lysholm scores improved over the 15-month follow-up period, matched data showed the most improvement occurred within the first 2 months post-operatively. A peak score of 90 was observed at nine months. Post-operative TAS results showed an improvement in level of function but did not reach pre-injury levels by the final follow-up. At final follow-up, six (1.1%) patients required an ACLR revision. Conclusion. Patients who completed a home-based rehabilitation programme in Kurdistan had low revision rates and improved Lysholm scores 15 months post-operatively. To optimise resources, further research should investigate the efficacy of home-based rehabilitation for trauma and elective surgery in low- to middle-income countries and the developed world

Introduction. Osteochondral lesions (OCLs) of the talus are a challenging and increasingly recognized problem in chronic ankle pain. Many novel techniques exist to attempt to treat this challenging entity. Difficulties associated with treating OCLs include lesion location, size, chronicity, and problems associated with potential graft harvest sites. Matrix associated stem cell transplantation (MAST) is one such treatment described for larger lesions >15mm2 or failed alternative therapies. This cohort study describes a medium-term review of the outcomes of talar lesions treated with MAST. Methods. A review of all patients treated with MAST by a single surgeon was conducted. Preoperative radiographs, MRIs and FAOS outcome questionnaire scores were conducted. Intraoperative classification was undertaken to correlate with imaging. Postoperative outcomes included FAOS scores, return to sport, revision surgery/failure of treatment and progression to arthritis/fusion surgery. Results. 58 MAST procedures in 57 patients were identified in this cohort. The mean follow up was 5 years. There were 20 females and37males, with a mean age of 37 years (SD 9.1). 22 patients had lateral OCLS were and 35 patients had medial OCLs. Of this cohort 32patients had previous surgery and 25 had this procedure as a primary event. 15 patients had one failed previous surgery, 9 patients had two, four patients had three previous surgeries and three patients had four previous surgeries. 12 patients had corrective or realignment procedures at the time of surgery. In terms of complications 3 patients of this cohort went on to have an ankle fusion and two of these had medial malleolar metal work taken out prior to this, 5 patients had additional procedures for arthrofibrotic debridements, 1 patient had a repeat MAST procedure, 1 additional patients had removal of medial malleolar osteotomy screws for pain at the osteotomy site, there were 2 wound complications one related to the ankle and one related to pain at the iliac crest donor site. Conclusion. MAST has demonstrated positive results in lesions which prove challenging to treat, even in a “ failed microfracture” cohort. RCT still lacking in field of orthobiologics for MAST. Longer term follow up required to evaluate durability

The treatment of massive rotator cuff tears remains controversial. There is lack of studies comparing patient-reported outcomes (PROM) of arthroscopic massive rotator cuff repairs (RCR) against large, medium and small RCRs. Our study aims to report the PROM for arthroscopic massive RCR versus non-massive RCR. Patients undergoing an arthroscopic RCR under a single surgeon over a 5-year period were included. Demographic data were recorded. Pre-operative Quick-DASH and Oxford Shoulder Score (OSS) were prospectively collected pre-operatively and at final review (mean of 18 months post-operatively). The scores were compared to a matched cohort of patients who had large, medium or small RCRs. A post-hoc power analysis confirmed 98% power was achieved. 82 patients were included in the study. 42 (51%) patients underwent massive RCR. The mean age of patients undergoing massive RCR was 59.7 and 55% (n=23) were female. 21% of massive RCRs had biceps augmentation. Quick-DASH improved significantly from a mean of 46.1 pre-operatively to 15.6 at final follow-up for massive RCRs (p<0.001). OSS improved significantly from a mean of 26.9 pre-operatively to 41.4 at final follow up for massive RCRs (p<0.001). There was no significant difference in the final Quick-DASH and OSS scores for massive and non-massive RCRs (p=0.35 and p=0.45 respectively). No revision surgery was required within the minimum one year follow up timescale. Arthroscopic massive rotator cuff repairs have no functional difference to non-massive rotator cuff repairs in the short term follow up period and should be considered in appropriate patient groups

There has been recent interest in the treatment of Dupuytren's disease by minimally invasive techniques such as needle fasciotomy and collagenase injection, but only few studies have reported the outcomes following open fasciotomy. This study attempts to address this gap, with a retrospective analysis of a large series of patients who underwent an open fasciotomy by a single surgeon over a five-year period. The aim of the study was to determine the requirement for re-operation in the cohort and to analyse the revisionary procedures performed. Theatre coding data was used to identify a consecutive series of patients who underwent open fasciotomy over a five-year period between 2000 and 2005. Within this group medical records were obtained for those patients who underwent a secondary procedure for recurrence. All procedures were carried out by a single surgeon in a regional hand unit using an unmodified open technique. A total of 1077 patients underwent open fasciotomy for Dupuytren's disease. Of these, 865 (80.3%) were male and 212 (19.7%) were female. The mean age at initial surgery was 64.4 years (range 21.7 to 93.7 years) for males and 68.3 (range 43.6 to 89.8 years) for females. Of the 1077 patients who underwent open fasciotomy, 143 patients (13.3%) subsequently underwent a second procedure for recurrence. The medical records were available for 97 patients. The median time to re-operation in this group of patients was 42.0 months (95% CI, 8.3 to 98.0 months). The most common revision procedure being dermofasciectomy (54.2%), followed by fasciectomy (32.6%) and re-do open fasciotomy (13.2%). Mean pre-operative total extension deficit was 88 degrees (range 30–180 degrees) with intra-operative correction to a mean of 9.5 degrees (range 0–45 degrees). There is no standard definition for recurrence after Dupuytren's surgery. We have looked at the rate of revision surgery after open fasciotomy, in a relatively fixed population serviced over a 5-year period by a single hand surgeon. A low re-operation rate has been identified, with good intra-operative correction achieved by secondary surgery

Aims

The purpose of this study was to develop a convolutional neural network (CNN) for fracture detection, classification, and identification of greater tuberosity displacement ≥ 1 cm, neck-shaft angle (NSA) ≤ 100°, shaft translation, and articular fracture involvement, on plain radiographs.

Aims

Ankle fracture fixation is commonly performed by junior trainees. Simulation training using cadavers may shorten the learning curve and result in a technically superior surgical performance.

Introduction. Aim of this study was to review a single surgeon series and analyse the results of hip reconstruction and compare them to an historical cohort. Methods and results. Retrospective review from a prospective database was undertaken of 113 CFD children since 1999. 31 of these patients had hip reconstruction with combined soft tissue and bony procedures akin to the Superhip. This cohort was compared to the results of the previous series using deformity planning methods on radiographic imaging, quantification of acetabular and femoral geometry, focussing upon the effects and results of hip reconstruction and lengthening. Compared to the previous series, this cohort achieved greater objective increases in length and significantly fewer complications involving the hip joint during the process.11 hips out of 45 (24.4%) that were treated in the previous cohort subluxed during lengthening. Since 1999 there were no subluxations with improved hip geometry. Primary difference between the cohorts was the recent group's preparatory hip surgery before the commencement of any lengthening even for borderline dysplasias. This had not been the case for all children in the previous cohort. This indicates a steep learning curve in the last 3 decades concerning the importance of primary hip reconstruction as a preparatory stage of treatment before lengthening in CFD with almost normalised acetabulae. Conclusion. Management of CFD needs detailed and methodical planning of soft tissue and bony deformities and better understanding has evolved over time to provide improved results and outcomes. Level of evidence. Therapeutic III

Limb reconstruction requires high levels of patient compliance and impacts heavily on social circumstances. The epidemiology and socioeconomic description of trauma patients has been well documented, however no study has assessed the epidemiology of limb reconstruction patients. The aim of this project is to describe patients attending Limb Reconstruction Services (LRS) in order to highlight and address the social implications of their care. All LRS cases under a single surgeon in a district general hospital were included from 2010 – 2016. Demographics, ASA grade, smoking status, mental health status and employment status were collated. Postcode was converted into an Index of Multiple Deprivation score using GeoConvert® software. Patient socioeconomic status was then ranked into national deprivation score quintiles (quintile 1 is most affluent, quintile 5 is most deprived). Deprivation scores were adjusted by census data and analysed with Student's T-test. The distance from the patient's residence to the hospital was generated through AA route planner®. Patient attendance at clinic and elective or emergency admissions was also assessed. Patient outcomes were not part of this research. There were 53 patients, of which 66% (n=35) were male, with a mean age of 45 years (range 21–89 years). Most patients were smokers (55%, n=29), 83% (n=42) were ASA 1 or 2 (there were no ASA 4 patients). The majority of indications were for acute trauma (49%), chronic complications of trauma (32%), congenital deformity (15%) and salvage fusion (4%). Mental health issues affected 23% (n=12) of cases and 57% of working-aged patients were unemployed. Mental health patients had a higher rate of trauma as an indication than the rest of the cohort (93% vs. 76%). Deprivation quintiles identified that LRS patients were more deprived (63% in quintiles 4 and 5 vs. 12% of 1 and 2), but this failed to reach statistical significance (p=0.9359). The mean distance from residence to hospital was 12 miles (range 0.35–105 miles, median 7 miles). The patients derived from a large region made up of 12 local authorities. There was a mean of 17 individual LRS clinic attendances per patient (range: 3–42). Cumulative distance travelled for each patient during LRS treatment was a mean of 495 miles (range 28 – 2008 miles). The total distance travelled for all 53 patients was over 26,000 miles. The results largely mirror the findings of trauma demographic and socioeconomic epidemiology, due to the majority of LRS indications being post-traumatic in this series. The high rates of unemployment and mental health problems may be a risk factor for requiring LRS management, or may be a product of the treatment. Clinicians may want to consider a social care strategy alongside their surgical strategy and fully utilise their broader MDT to address the social inequalities in these patients. This strategy should include a mental health assessment, smoking cessation therapy, sign-posted support for employment circumstances and a plan for travel to the hospital. The utilisation and cost of ambulance services was not possible with this methodology. Further work should prospectively assess the changes in housing circumstances, community healthcare needs and whether there was a return to employment and independent ambulation at the end of treatment

Scheuermann's kyphosis is a structural deformity of the thoracic or thoracolumbar spine, which can result in severe pain, neurological compromise and cosmetic dissatisfaction. Modern surgical techniques have improved correction through a posterior-only or antero-posterior approach but can result in significant morbidity. We present our results of the surgical management of severe Scheuermann's kyphosis by a single surgeon with respect to deformity correction, global balance parameters, functional outcomes and complications at latest follow-up. We included 49 patients, of which 46 had thoracic and 3 had thoracolumbar kyphosis. Surgical indications included persistent back pain, progressive deformity, neurological compromise and poor self-image. Fourty-seven patients underwent posterior-only and 2 antero-posterior spinal arthrodesis utilising Chevron-type osteotomies and hybrid instrumentation. Mean age at surgery was 16.0 years with mean postoperative follow-up of 4.5 years. Mean kyphosis corrected from 92.1o to 46.9o (p<0.001). Concomitant scoliosis was eliminated in all of the 28 affected patients. Coronal and sagittal balance was corrected in all patients. Mean blood loss was 24% total blood volume. Mean operation time was 4.3 hours with mean inpatient stay of 9 days. SRS-22 questionnaire improved from a mean preoperative score of 3.4 to 4.6 at 2 years, with high treatment satisfaction rates. Complications included one toxic septicaemia episode but otherwise no wound infections, no junctional deformity, no loss of correction and no requirement for re-operation. Posterior spinal arthrodesis with the use of hybrid instrumentation can safely achieve excellent correction of severe Scheuermann's kyphosis helping to relieve back pain, improve functional outcomes and enhance self-image

Methods:. Total radiation exposure accumulated during circular frame treatment of distal tibial fractures was quantified in 47 patients treated by a single surgeon from March 2011 until Nov 2014. The radiation exposures for all relevant radiology procedures for the distal tibial injury were included to estimate the radiation risk to the patient. Results:. The median time of treatment in the frame was 169 days (range 105 – 368 days). Patients underwent a median of 13 sets of plain radiographs; at least one intra operative exposure and 16 patients underwent CT scanning. The median total effective dose per patient from time of injury to discharge was 0.025 mSv (interquartile range 0.013 – 0.162 and minimum to maximum 0.01–0.53). CT scanning is the only variable shown to be an independent predictor of cumulative radiation dose on multivariate analysis, with a 13 fold increase in overall exposure. Conclusion:. Radiation exposure during treatment of distal tibial fractures with a circular frame in this group was well within reasonably safe limits. CT was the only significant predictor of overall exposure serves as a reminder to individually assess the risk and utility of radiological investigations on an individual basis. This is consistent with the UK legal requirements (Ionising Radiation (Medical Exposure) Regulations 2000. 1. )

We carried out a retrospective review of 47 intra-articular fractures of the calcaneum treated by open reduction and internal fixation in 45 patients by a single surgeon between 1993 and 2001. The fractures were evaluated before operation by plain radiographs and a CT scan using Sanders’ classification. Osteosynthesis involved a lateral approach and the use of the AO calcaneal plate. The mean follow-up was for ten years (7 to 15). Clinical assessment included the American Orthopaedic Foot and Ankle Society Score (AOFAS), the Creighton-Nebraska Score, the Kerr, Prothero, Atkins Score and the SF-36 Health Questionnaire. The radiological evaluation consisted of lateral and axial views of the os calcis. Arthritic changes in the subtalar joint were assessed with an internal oblique view and were graded using the Morrey and Wiedeman scale. There were 18 excellent (38.3%), 17 good (36.2%), three fair (6.3%) and nine poor (19.2%) results. Five patients had a superficial wound infection and five others eventually had a subtalar arthrodesis because of continuing pain. Restoration of Böhler’s angle was associated with a better outcome. The degree of arthritic change in the subtalar joint did not correlate with the outcome scores or Sanders’ classification. Prompt osteosynthesis should be considered for intra-articular fractures of the calcaneum in order to restore the shape of the hindfoot and Böhler’s angle

Aims

The aims of this study were to assess the pre- and postoperative incidence of deep vein thrombosis (DVT) using routine duplex Doppler ultrasound (DUS), to assess the incidence of pulmonary embolism (PE) using CT angiography, and to identify the factors that predict postoperative DVT in patients with a pelvic and/or acetabular fracture.

Management of irreparable rotator cuff tears is challenging and controversial. Surgeons have been utilising biological tissue scaffolding to augment repairs, but there are concerns regarding viability and function. We wished to investigate this viability and clinical outcome in a small group of patients. All procedures were performed by a single surgeon over a three-year period. Inclusion criteria were patients with large cuff tears and failure of non-operative treatment. Exclusion criteria were patients with glenohumeral arthritis and where cuff repair could not be successfully performed. Open rotator cuff repair followed by augmentation with Graft Jacket® Regenerative Tissue Matrix (Wright Medical) was performed in all patients. A structured cuff repair physiotherapy protocol was then followed. Follow-up was at six months and at minimum twenty-four months post-operatively where Constant scores (CS) and Oxford Shoulder scores (OSS) were noted and a repeat ultrasound performed. Fourteen patients underwent the procedure. No patient was lost to follow-up. There were seven males and seven females with a mean age of 63 years (range 31–77). At minimum twenty-four month follow-up, thirteen patients had flexion and abduction above 90 degrees and symmetrical external rotation. Mean CS was 81 (range 70–91) and mean OSS was 46 (range 41–48). Shoulder ultrasound revealed an intact Graft Jacket® in all thirteen patients. The final patient had lower functional movement and lower CS (34) and OSS (25) and ultrasound identified a re-rupture. This study indicates that augmentation of large rotator cuff repairs with biological tissue scaffolding is a viable option and has good functional results

The Global Conservative Anatomic Prosthesis (Global CAP) is an uncemented press fit humeral resurfacing implant developed by DePuy. We report a single surgeon series of Global CAP prostheses implanted in Norwich. 103 procedures were carried out between 2006 and 2011, in 93 patients. Mean age was 72 years (range 43 to 90). Patients were followed up for a mean 8 months (range 0 to 56). Pre-operative Oxford shoulder scores were recorded in a preadmission clinic and an Oxford score questionnaire was sent to patients post-operatively in December 2011. The mean score preoperatively was 19, rising to 28 postoperatively. Two patients developed rotator cuff tears and have been revised to reverse polarity arthroplasty. One is pending revision for a cuff tear. This prosthesis shows promise at this early stage for compensated glenohumeral arthritis when a bone preserving procedure is desirable

Introduction. End-stage ankle osteoarthritis is a debilitating condition that results in functional limitations and a poor quality of life. Ankle arthrodesis (AAD) and total ankle replacement (TAR) are the major surgical treatment options for ankle arthritis. The purpose of the present study was to compare preoperative and postoperative participation in sports and recreational activities, assesses levels of habitual physical activity, functional outcome and satisfaction of patients who underwent eighter AAD or TAR. Methods. 41 patients (mean age: 60.1y) underwent eighter AAD (21) or TAR (20) by a single surgeon. At an average follow-up of 30 (AAD) and 39 (TAR) months respectively activity levels were determined with use of the University of California at Los Angeles (UCLA) activity scale. The American Orthopaedic Foot and Ankle Society (AOFAS) hindfoot score, patients's satisfaction and pre- and postoperative participation in sports were assessed as well. Results. In the AAD group 90% and in the TAR group 76% were active in sports preoperatively. Postoperatively in both groups 76% were active in sports (AAD p=0.08). The UCLA score was 7.0 (± 1.9) in the AAD group and 6.8 (± 1.8) in the TAR group (p=0.78). The AOFAS score reached 75.6 (± 14) in the AAD group and 75.6 (± 16) in the TAR group (p=0.97). Conclusion. Our study revealed no significant difference between the groups concerning activity levels, participation in sports activities, UCLA and AOFAS score. After AAD the number of patients participating in sports decreased. However, this change was not statistically significant

AIM. Failure of a primary anterior cruciate ligament (ACL) reconstruction is associated with poor functional outcomes even after revision surgery. The aim of this study is to identify early predictors for failure, so that it may aid in recognition of at-risk patients. METHOD. An observational study was conducted of 623 patients undergoing primary ACL reconstruction by a single surgeon over a 72 month period. Patient and procedure related parameters including age, gender, BMI, time to surgery, graft size, fixation methods, meniscal and chondral injuries, meniscal surgery, radiological parameters and post-operative IKDC scores. Logistic regression modeling was employed to identify those factors which were statistically significant for failure. RESULTS. We identified 14 patients who experienced failure of their ACL graft. The causes for failure included trauma (9), infection (2), arthrofibrosis (1), biological (1) and recurrent instability (1). Univariate analysis established a significant relationship between age at time of injury (p<0.001), BMI (p=0.001), time to index procedure (p<0.001), screw length (p=0.04) and early post-operative IKDC score (p<0.001). Multivariate analysis demonstrated all factors stated except screw length to be important for predicting failure for ACL reconstruction. CONCLUSIONS. The rate of graft failure is lower than has been those quoted in the literature. We have identified those patients who are at high risk of rupturing a reconstructed primary ACL graft. Careful monitoring and functional modification of high-risk patients may be indicated to prevent failure. This study identifies predictive factors of failed ACL reconstruction. Age at time of injury, BMI, time to surgery, post-operative IKDC scores were found to be associated with failure

Background. Controversy persists regarding preference between Herbert and Acutrak screw for internal fixation of scaphoid non-union. Acutrak screw has been shown to have better biomechanical compression properties than Herbert screw in the laboratory setting. The aim of this study was to assess the clinical, radiological and functional outcome of patients treated with the two different screw systems. Methods. A retrospective review of the results of patients with scaphoid non-union treated by a single surgeon. Group 1 comprised of 61 patients treated with Herbert screw between July1996 and June2000 and Group 2 comprised of 71 patients treated with Acutrak screw between July 2000 and December 2005. Union rates were assessed radiologically and clinically. Functional outcome was measured by using modified Mayo wrist score. Results. Both groups of patients were comparable in terms of age (25.3:27.3yrs, Herbert: Acutrak) and their occupations in relation to wrist loading. The mean time interval between injury and surgery was 12.2months for Herbert group (range: 3–144months) and 17months (range: 4–180months) in Acutrak group. Time to union was similar for both groups. Union rate was 93% (66) in Acutrak compared to 77% (47) in Herbert screw. Union rate was related to fracture site (Herbert p=0.01; Acutrak p=0.0001) and higher when the screw had been placed axially (Herbert; p=0.006, Acutrak; p=0.004) in the scaphoid. Ninety seven percent of screws had been placed axially in Acutrak compared to 84% in the Herbert. Functional outcome was satisfactory in 85% of Acutrak group compared to 67% in Herbert. Wrist fusion was performed in 4 patients in Herbert group due to progressive wrist pain and in 1 patient in Acutrak group due to similar reason. Conclusion. Acutrak screw provides more accurate method of screw placement and a higher union rate when compared to Herbert screw

Introduction. The prosthetic impingement occurs if the range of motion of the hip exceeds implant mobility or in case of component malorientation. This retrieval study was designed to assess the frequency and the risk factors of this phenomenon. Material and Methods. The frequency and the severity of the impingement were calculated from a continuous series of 311 cups retrievals collected between 1989 and 2004 by a single surgeon. The reason for retrieval was loosening (131 cases), infection (43 cases), instability (56 cases), osteolysis (28 cases), unexplained pain (48 cases) and prosthetic impingent (5 cases all with hard bearings). The notching at the cup rim was assessed twice by two examiners with optic magnification. The risk factors were analyzed from clinical charts by univariate and cox multihazard. Results. Among the 311 cups explants, the frequency of impingement was 59.2% (it was severe in 11%, the notching exceeding 3 millimeters). The impingement was the reason for removal in only 1.6%, meaning that it was mainly unexpected (98.4 percent). The impingement was more frequent when revisions were performed because of instability (notching 80%), when the sum of hip motion exceeded 200 degrees (sum of motion in the 6 degrees of freedom of the hip) (notching 66%). The other risk factors were: use of heads with skirts, liner with an elevated rim, and head-neck ratio below 2, younger age at surgery. The multivariate analysis identified only two independent factors: 1) the use of skirted heads (Odd ratio 3.2 (1.2–15.3)), 2) and revision because of instability (Odd ratio 4.2 (1.1–16.2)). In contrast different classical factors were not correlated with impingement on retrieval: cup inclination, the duration before retrieval, the indication for primary prosthetic replacement. Discussion and Conclusion. This study underlines the impingement is common when assessing cup retrievals (over 50 percent). One should be aware of impingement when performing hip replacement in patients having a high range of motion. This situation may require prostheses with a high head-neck ratio, as well as use of computer-assisted surgery. One should avoid liners with elevated rim as well as heads with skirts to prevent dislocation, particularly when other risk factors are detected

Introduction. Total knee replacement has been well-established form of treatment both for osteoarthritis and inflammatory arthritis. Both cemented and uncemented TKR have been used successfully. Since 1977 low contact stress (LCS) mobile bearing knee replacement has been in extensive use. Most of the intermediate and long term results reported are in osteoarthritis1–7. Though there are several studies reporting short term performance of TKR in rheumatoid arthritis8–19 there have been rare reports31 of intermediate to long-term performance of LCS uncemented TKR in rheumatoid arthritis. Methods. Retrospective, non-randomised and consecutive study. Case notes and radiological assessment done. Kaplan meyer survival analysis used. Radiological assessment between initial and final xrays done using T test statistics. Assessement done by two independent observer. Results. 108 knees in 67 patients are collected. 21 patients with 36 knees have died. Only 65 knees in 42 patients had both case notes and xrays which are included in this study. Of this 11 knees in 7 patients were dead. All 65 knees in 42 patients are sero-positive rheumatoid arthritis. Pre-operative bone loss was seen only in 4 knees. Bone loss was in the medial side in 3 knees (4,5 and 8mm respectively) and lateral in 1 knee (1 cm). None of these bone loss needed bone grafting or any special procedures. There was no subsidence in any of the 65 knees. Survival of uncemented LCS TKR in inflammatory arthritis patients is 100%. Aseptic failure is 0%. No infective failure. There is no significant change in the implant position. This is the longest follow for uncemented TKR in inflammatory arthritis ever reported in the literature. Conclusion and Discussion. In conclusion, our study has uniformity, as a single surgeon performed/supervised with senior trainees all the operations and all patients received the same level of post-operative care. Survival of LCS uncemented TKR in inflammatory arthritis patients is 100% up to 15years. This is the longest follow up in this patient population ever reported in the literature. Our study shows excellent survival and comparable to other cemented TKRs in this patient population reported in the literature. This study proves contrary to the general belief that uncemented TKR do poor in inflammatory arthritis due to osteoporotic bone