To identify the degree of morphological change achievable following the Bereiter trochleoplasty and to establish whether these results are comparable with functional outcomes. Seventeen consecutive patients (19 knees) with patellar instability secondary to trochlear dysplasia underwent trochleoplasty, of which 12 knees (12 patients) were radiologically evaluated pre- and post surgery using axial CT and MRI imaging. Their mean age at time of surgery was 28.1 years (15 to 44). The mean follow-up was 2.2 years (0.5 to 5). The following four radiological outcomes were used: trochlear depth (TD), transverse patellar shift (TPS), lateral patellar inclination angle (LPIA) and sulcus angle (SA). All knees were assessed post-operatively using MRI. The axial CT images were reformatted which allowed for direct comparison with MRI. Each knee was radiologically evaluated twice by a senior musculoskeletal radiology consultant to increase data accuracy and assess for intra-observer reliability using the intraclass correlation coefficient (ICC). Functional outcomes consisted of the KOOS, Lysholm, Kujala and Tegner scores.Purpose of Study
Methods
To identify the early functional outcomes, survivorship and complications associated with the Corin Uniglide Unicompartmental Knee Replacement (UKRs) from an independent centre. A prospective consecutive case series of sixty Uniglide UKRs was carried out in fifty-one patients between January 2006 and March 2009. The data collected included:
Primary outcome measures: Pre- and post-operative American Knee Society Score (AKSS), Oxford Knee Scores (OKS), WOMAC Survivorship Secondary outcome measures: X-ray error scores assessing component position Complications No cases were lost to follow-up. Mean follow-up time was 19 months (12 to 36months) and mean age was 66 years (39 to 78 years). Kaplan-Meier Survivorship showed 95% survival at 3 years (CI:6.4). All functional outcomes showed significant improvement p <0.05. There were two revisions within the first year, which were the main complications, secondary to aseptic tibial loosening and collapse of the posteromedial tibia. The x-ray error score identified the most common error as the femoral flexion/extension angle followed by the anterior/posterior fit.Purpose of Study
Methods and Results
The technique uses a single hamstring tendon with undisturbed biological distal attachment, where the free end is routed through a longitudinal tunnel in the dorso-medial aspect of the patella and fixed to an isometric point near the medial femoral epicondyle using an interference screw. The position of femoral attachment is the most important factor in achieving an isometric graft.
