臼底突出症例のTHAにおけるソケット設置の工夫
2000 年 19 巻 3-4 号 p. 191-195
詳細
2000 年 19 巻 3-4 号 p. 191-195
From 1994 to 1998, at Hitachi Ltd., Taga General Hospital, 12 hips of 11 rheumatoid arthritis (RA) patients with protrusio acetabuli were treated with total hip arthroplasty (THA) using a socket implant technique. The surgical procedure was done in three stages.
Firstly, the acetabular rim was reamed out to make a seat for the bearing-socket, using a reamer slightly larger than the original rim (mean size 4.9 mm larger) .
Secondly, morsellized bone was grafted into the acetabular bottom.
Thirdly, a socket 1-2 mm larger than the reamer was implanted without cement, and fixed with 3 screws.
Clinical results, assessed by JOA hip scores, showed improvement (from a mean of 23.3 before THA to a mean of 69.3 after THA) . X-P films showed that trabecular bridging of graft bone occurred in a mean of 46.3 days, and that trabecular reorientation of graft bone occurred in a mean of 153.3 days. Resorption of graft bone, and socket migration were not found.
These results seem satisfactory.
