| Autor: |
Watanabe, Hidetoshi, Shimada, Yoichi, Sato, Kozo, Tsutsumi, Yoshihiro, Sato, Mineyoshi |
| Předmět: |
|
| Zdroj: |
Bio-Medical Materials & Engineering; 1998, Vol. 8 Issue 3/4, p177, 10p |
| Abstrakt: |
Summary of background. Intertrochanteric varus osteotomy of the femur for hip osteoarthritis is expected to bring improved congruity and increased weight-bearing surface area of the hip joint. Before surgery, we usually make a tracing on a paper using an anteroposterior roentgenogram of the hip to simulate the operating procedures and obtain better conditions in the hip. Nevertheless, there have been some cases in which this procedure does not provide satisfactory postoperative results in terms of relief of pain or locomotion, with long-term limp due to weakness of the hip abductor muscle group and shortening of the leg.Objectives. To confirm if the improved congruity and increased covering of the weight-bearing surface area obtained by varus osteotomy can be actually reproduced during walking, and to evaluate the kinetic mechanism of the effects of this procedure using gait analysis.Methods. We measured the strength ratio of the hip abductor muscles as the percent of the opposite side, and analyzed the pelvic movement and data of dynamic electromyography (EMG) recorded during locomotion in 24 female patients who underwent unilateral intertrochanteric varus osteotomy of the femur for hip osteoarthritis, 30 non-surgically-treated female patients with hip osteoarthritis, and 54 healthy women. In the operated patients, the roentgenograms obtained during one-legged stance on the affected side disclosed that 10 were positive for Trendelenburg’s phenomenon (T(Results. This study disclosed that the stance phase time was shorter and the strength ratio of the hip abductor muscles was lower in the operated patients than those in the other 2 groups, and the change of the pelvic obliquity was smaller and the % MVC of the gluteus medius and tensor fascia latae were greater than those in the normal subjects. The change of the pelvic tilt showed the same pattern with those of the pelvic obliquity. The T(Conclusion. This study showed the postoperative reappearance of... [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
