抄録
It remains a matter of debate whether displaced femoral neck fractures in the otherwise normal hips of rheumatoid patients should be treated by bipolar hemiarthroplasty or total hip arthroplasty.
Bipolar hemiarthroplasty was performed on 37 displaced femoral neck fractures in the normal hips of 32 rheumatoid patients. The average age was 65.7 years. There were 31 women and one man. The average follow-up period was 4 years, with a range of 4 months to 13 years.
Plain x-rays of the operated hips at the follow-up examination were compared with x-rays taken immediately after surgery.Progression of the degree of protrusion was determined by measuring the distance of the prosthesis' outer head from the Köhler's line, and by measuring vertical and horizontal distances of the center of the outer head from the teardrop.
Thirty-six (97%) of the 37 hips did not demonstrate radiographic evidence of protrusion, and in only one hip (2.7%) central and upper migration of 2 mm was noted.
Our results suggest that bipolar hemiarthroplasty for displaced femoral neck fractures in the normal hips of rheumatoid patients may prove to be the procedure of choice.
