Abstract
To investigate the clinical results of capsular arthroplasty in the treatment of young patients with unilateral hip dislocation.
We retrospectively evaluated all patients who had the capsular arthroplasty from June 2012 to September 2016 in our department. Hips were evaluated using hip Harris score (HHS) and Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) score. The Tonnis osteoarthritis grade and Severin classification were used to access the radiographic outcomes.
Fifty-nine patients (10 males and 49 females) with an average of 16.8y (range: 8–26y) were followed by a mean of 32.1 months (range: 12.5–66.0 months). The mean HHS was 83.4 (range: 31.2–99) and WOMAC score was 12.3 (range: 0–49) at the final follow up. Multivariate analysis revealed that the poor capsular quality (OR=8.29) was associated with the poor result. The thicker capsule (OR=0.83) and bigger femoral head (OR=0.73) were associated with the good result. There were 15 patients (25.4%) identified as Tonnis grade 0, 21 patients (35.6%) as grade 1, 18 patients (30.5%) as grade 2 and 5 patients (8.5%) as grade 3. According to Severin classification, 28 patients (47.6%) were regarded as class I, 22 patients (37.3%) as II, 7 patients (11.9%) as III and 2 patients (3.4%) as IV. One patient underwent THA after 41.5 months. The joint stiffness was the most common complication (10.2%).
We confirmed the efficacy of the capsular arthroplasty in the treatment of young patients with unilateral hip dislocation. The capsular quality and the size of femoral head were associated with the clinical results.
