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BACKGROUND Necrosis and inflammation in peri-implant soft tissues have been described in failed second-generation metal-on-metal (MoM) resurfacing hip arthroplasties and in the pseudotumors associated with these implants. The precise frequency and significance of these tissue changes is unknown. METHOD We analyzed morphological and immunophenotypic(More)
This is a review of the results of 17 knees treated by modular-type (Marmor) unicompartmental knee prostheses. The average age at the time of the operation was 62 years with an average follow-up period of 59 months. All the patients improved and were satisfied with the operation. There were no cases of revision or degenerative changes in the opposite(More)
BACKGROUND Total knee replacement (TKR) or unicompartmental knee replacement (UKR) are options for end-stage osteoarthritis. However, comparisons between the two procedures are confounded by differences in baseline characteristics of patients undergoing either procedure and by insufficient reporting of endpoints other than revision. We aimed to compare(More)
The cementless Oxford unicompartmental knee replacement has been demonstrated to have superior fixation on radiographs and a similar early complication rate compared with the cemented version. However, a small number of cases have come to our attention where, after an apparently successful procedure, the tibial component subsides into a valgus position with(More)
Isolated patellofemoral osteoarthritis can be treated with patellofemoral arthroplasty (PFA). In contrast to total knee arthroplasty, the effect of PFA on knee joint kinematics is not known. A study was performed to identify the kinematic changes after PFA. The sagittal plane kinematics was examined in 12 patients who had undergone Avon PFA. An established(More)
BACKGROUND The management of prosthetic joint infection is complex and there is a lack of standardisation of approaches. We evaluated the role of plain film radiography in predicting prosthesis failure after the first stage of a two-stage revision procedure in a retrospective case-control study. METHODS Plain films for 41 patients aged 46 to 87 years(More)
BACKGROUND High short-term failure rates have been reported for several metal-on-metal hip resurfacing (MoMHR) designs. Early observations suggested that MoMHRs revised to total hip arthroplasties (THAs) for pseudotumor had more major complications and inferior patient-reported outcomes compared with other revision indications. However, little is known(More)
Symptomatic osteoarthritis (OA) of the knee develops often in association with anterior cruciate ligament (ACL) deficiency. Two distinct pathologies should be recognised while considering treatment options in patients with end-stage medial compartment OA and ACL deficiency. Patients with primary ACL deficiency (usually traumatic ACL rupture) can develop(More)
AIMS An evidence-based radiographic Decision Aid for meniscal-bearing unicompartmental knee arthroplasty (UKA) has been developed and this study investigates its performance at an independent centre. PATIENTS AND METHODS Pre-operative radiographs, including stress views, from a consecutive cohort of 550 knees undergoing arthroplasty (UKA or total knee(More)
BACKGROUND Wide variability in cup orientation has been reported. The aims of this study were to determine how accurate surgeons are at orientating the acetabular component and whether factors such as visual cues and the side of operating table improved accuracy. METHODS A pelvic model was positioned in neutral alignment on an operating table and was(More)