We prospectively investigated the radiological outcomes of the uncemented Oxford medial compartment arthroplasty in 231 consecutive patients performed in a single centre with a minimum two year follow up. The functional outcome using the Oxford knee score and the High Activity Arthroplasty Score were significantly improved on the pre-operative scores (p<0.001). There were 196 patients with a radiological examination that was acceptable for analysis of the bone-implant interface. Of the six tibial zones examined on the anteroposterior radiograph there were only three with a partial radiolucent line (3 out of 1176 zones). All were present in the medial aspect of the tibial base plate (Zone 1) and all were <1 mm in size. All of these patients were asymptomatic. There were no radiolucent lines seen around the femoral component or on the lateral tibial view. There was one revision for mal-seating of the tibial component.Method.
Results.
Since 1989 the Ganz periacetabular osteotomy has been performed in Christchurch for pain arising from hip dysplasia in selected patients. This review was performed to assess symptoms, function and radiographic appearances at a medium term follow up. The results of 14 peri-acetabular osteotomies performed in 13 patients was evaluated. The mean age of the patients at the time of surgery was 23 years (range 17–44). The mean duration of follow up was 5 years (3 months to 13 years). The follow up examination included clinical evaluation, chart review and radiographic analysis. Of the 13 patients evaluated, improvement in pain was achieved in 12. One required a hip replacement and intermittent discomfort was noted in 3 resulting in restriction in activites. Complications included sciatic nerve palsy (1), leg length discrepancy (2), superficial wound infection (1), scar tenderness (2), numbness in lateral femoral cutaneous nerve distribution (5) and pain from prominent metalware (1). Improvement in femoral head coverage was seen in all patients on follow up x-ray with minimal progression of arthritic changes. Improvement in symptoms ranging from complete relief of pain and participation in high intensity sporting events to intermittent discomfort was achieved. One failure occurred requiring arthroplasty. Significant complications occurred but have largely resolved. The osteotomy was successful in obtaining good relief of symptoms and has prevented the requirement for total hip replacement in this young active group.
