We reviewed the results of the 71 cases of total hip replacements that had been done with the P-M type cementless total hip prosthesis tor 60 patients. This type of prosthesis consist of threaded acetabular component and anatomically
adapted
femoral stem. The following check-up for more than two year to 5 years(average 40months) at the department of Orthopeddic Surgery, Inha General hospiatal, Inha medical school, during the period of Jan. 1987 to dec. 1992.
@ES The result were followings;
@EN 1. Modified Harris hip score was 39.4 before operation but it raised to average 86 after 4 years of operation and it become decreased after on.
2. The pain in the thigh were shown on 15 patients(21%) of the patients after 2 years of surgery ad more than the slight pain, then in increased aftertime.
3. The fixation of femoral stem consisted with 27(38.0%) of excellent fixation, 30(42.3%) of good fixation, and 14 cases(20.7%) of poor fixation.
4. The 12 cases(16.9%) showed more than 2mm of radiolucent zone around the femoral stem.
5. The 13 cases(18.3%) showed more than 5mm of vertical subsidence, and the vertical subsidence frequently occured with poor fixation of the femoral stem on the radiographic image(p<0.05), and function of the hip joint was
decreased
thereafter(p=0.0199).
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