RESUMO
Objective To investigate the preliminary clinical efficacy of total hip arthroplasty (THA) patients with pelvic sagittal alignment pathology. Methods The clinical data of 120 THA patients who had normal pelvic sagittal alignment and 40 THA patients who had pathology between 2013 and 2016 were retrospectively studied. Complication rate and survival rate were collected and analyzed. Results Complete case records were documented in 160 cases who were followed up for an average 26 months (range, 2—45 months). For pelvic alignment parameters: the average pelvic incidence (PI) of normal group was similar to pathology group, and no significant difference was found in two groups:(46.32 ± 4.29)°vs. (45.15 ± 3.16)°, P>0.05. There were significant differences in pelvic tilt (PT) and sacral slope (SS) between two groups: (46.32 ± 4.29)°vs. (17.51 ± 2.31)°, (38.01 ± 1.92) vs. (27.64 ± 1.72)°, P＜0.05. Two cases suffered from dislocation, half year successful rate was 99.2%, 1-year was 98.3% and 2-year was 98.3% in normal group. Four cases suffered from dislocation, half year successful rate was 95.0%, 1-year was 92.5% and 2-year was 90.0% in pathology group. Conclusions Prior lumbar-pelvic sagittal alignment pathology increases risk of complication in THA, which can obviously change hip biomechanical characteristic.