The author tried to get result after clinical and radiological studies with 39 patients (50 hip Joints) who have been operated non-cemented bipolar hemiarthro-plasty or total hip replacement arthroplasty with usin
AML(Courtesy
Depuy. Warsaw, Ind.) femoral stem and who could be followed for the period of more than two years(average 39 months) at the INHA University Hospital, Dept. of Orthopaedic Surgery from the Feb, 1989 through the Feb, 1992.
@ES The results were as rollows
@EN 1. There were 41 cases of press-fit on the radiogram after operation, 9 cases of no press fit.
2. Pre-operative Harris hip score was average 37.4, but it mas raised to 82.9 after operation, Amomg them, Harris hip score for the press fit group was 86.1 and those of no press fit group was 79.6 it shows significant statistical
differences (p<0.05).
3. The vetical subsidence, calcar resorption and reactive white lines were relatively higher incidence at the case of no press fit remoral stem, but here were no sig nificant statistical meanings compared with press fit group(p<0.05).
5. The 39 (78%) cases were assessed with bony remodeling by the stress shielding effect and press fit group was on the 3rd degree stress shield effect which was much higher in those of no press fit, it shows significant
statistical
meanngs(p<0.05)
6. The fixation with bony ingrowth bony ingrowth which was estimated through the final radiologic evaluations, were 25 cases(50%), stable fibrous ingrowth fixation were 23 case(46%), and unstable fixation were 2 cases(4%). The higher
incidences
of
bony ingrowth fixation were shown at the cases of press fit stem, and stable fibrous ingrowth fixation for the no press fit of it. There were significant statistical meanings between the incidences(p<0.05).
According to the conclusion of this retrospective study, the noncemented hip arthroplasty using AML femoral stem in initial press fit group had much better clinical results than no press fit group.
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