From: Total hip arthroplasty to treat acetabular protrusions secondary to rheumatoid arthritis
Demographics | Data |
---|---|
Gender | 6 males (6 hips), 12 females (14 hips) |
Mean age | 45.8 ± 8.3 years (range 37.0 to 68.5) |
Course of disease | 8~17 years (mean 9.2 ± 1.3 years) |
Acetabular type | Type I protrusion (1~5 mm), 0 case; type II protrusion (6~15 mm), 15 cases (17 hips); type III protrusion (> 15 mm), 3 cases (3 hips) |
Outreach angle | Extension angle < 25°, 12 cases (14 hips); mild extension limitation (extension angle > 25°), 6 cases (6 hips) |
Abductor muscle strength classification | Grade IV, 9 cases (11 hips); grade III, 9 cases (9 hips) |
Operation time | 55~131 min, 89.5 ± 8.1 min |
Blood loss | 165~480 mL, 295 ± 10.9 mL |
Preoperative Harris score | 55.3 ± 9.5 (40~65) |
Postoperative Harris score | 92.2 ± 12.7(89~95) |
Preoperative hip flexion and extension activity | 41.5° ± 6.7° |
Hip flexion and extension at the last follow-up | 102.3° ± 14.5° |
Distance between the preoperative femoral head center and the ischial tubercle connection | 77.55 ± 12.3 mm |
Distance from the femoral head to the ischial tubercle at final follow-up | 72.83 ± 11.1 mm |
Distance from the femoral head center to the Kohler line | 19.87 ± 3.9 mm |
Distance from the femoral head center to the Kohler line | 21.5 ± 3.5 mm |
Follow-up time | 2.5~6, 4.5 ± 1.7 years |