hip arthroplasty/鄔培慧(Wu Peihui，Dept Joint Surg，1st Affil Hosp Sun Yat-sen Univ，Guangzhou，Guangdong 510080)…∥Chin J Clin Basic Orthop Res.－2010，2(4).－250～253

Effect of femoral offset on the gait after total

hip arthroplasty/鄔培慧(Wu Peihui，Dept Joint Surg，1st Affil Hosp Sun Yat-sen Univ，Guangzhou，Guangdong 510080)…∥Chin J Clin Basic Orthop Res.－2010，2(4).－250～253

ObjectiveTo investigate the effect of femoral offset ratio on gait temporospatial variables of operative side of lower extremity in walking after total hip arthroplasty(THA).MethodsAccording to the inclusion criteria，29 patients(58 hips)of unilateral THA in our hospital were selected.Femoral offset ratio(FOR)were calculated by measuring the femoral offset of the femoral offset of the bilateral hips through standard pelvis AP X-ray.The temporospatial variables were measured by three-dimensional gait analysis，and then were compared statistically between the operative and the opposite sides in both groups which divided by FOR.ResultsThere were 10 patients in group A whose FOR of operative sides were smaller than the opposite sides，and the other 19 patients whose FOR vice versa in group B.In group A，the differences of single leg support time，step time and stride length between both sides had statistical significance(P ＜0.05)，while there were no statistical differences of stried frequency，gait velocity，stride time，step distance and double legs support time between both sides(P＞0.05).In group B，n statistical differences of temporospatial variables were found between both sides(P＞0.05).ConclusionThe reduction of femoral offset of operative side has a serious effect on the gait after THA，and the construction of femoral offset should be helpful for the biomechanical rehabilitation of hip joint and the improvement of postoperative gait.13 refs，1 fig，1 tab.

(Authors)