For the femoral neck fracture of the old patients, we have positively carried out the prosthetic replacement. But the old patients have more complications, and the results of the prosthesis were not so satisfied. We carried out 82 cases of the prosthetic replacement from 1974 to 1982, but only 38 cases could be investigated. The results of 38 cases were: 7 excellent, : 26, good; 4, fair and one poor.
In one case of the traumatic femoral neck fracture which developed the central migration, the total hip replacement was performed subsequently.
The distal migration occurred in 3 cases with severe osteoporosis. To prevent the distal migration the bone-cement is useful.
