OMNIFIT 型人工骨頭置換術症例の検討

抄録

The purpose of this study is to clarify the effect of OMNIFIT system in hip prosthesis. Twenty-two hip joints of 21 cases treated by prosthesis operations with OMNIFIT system were evaluated by postoperative results and roentgenograms. The age range was from 52 to 94 years old with an average of 75 years old. The follow-up term ranged from 6 months to 47 months with an average of 25 months.
According to the JOA score, 16 patients showed good results. Other 5 cases showed bad results due to complications, such as senile dementia, rheumatoid arthritis, and parkinsonism.
Changes of roentgenographic findings, such as sinking of the stem, sclerotic changes of the acetabula, and osteoporotic changes, gave no influence on the postoperative results.
Range of motion between the inner and outer heads showed a marked decrease especially in the cases which had reaming of the acetabula.
The Sharp angle of the outer head showed a marked decrease especially within a month after operations. Range of motion between the inner and outer heads showed significant relationship with the Sharp angle. Varus position of the outer head is good for mobility between the inner and outer head.
OMNIFIT system was thought to be an effective prosthesis.