We performed 81 cases of cementless total hip replacement in patients, who were older than 60 years old at the time of operation from December 1986 to December 1991 and analysed 25 cases of them which were followed for minimum four years to
evaluate the
results of cementless total hip replcement in old age group over 60 years old .The average age of the patients was 66 years(60-80n years) at the time of operation, and the mean follow-up period was 58 months(48-83months). Nine cases were
diagnosed
with
avascular necrosis, nine cases were fractures of neck of femur, five cases were osteoarthritis, one case was revision after hemiarthroplasty, and one case was ankylosed hip. The mean initial Harris hip scores was 42 and the mean final hip scores
was 90.
On radiologic evaluation, bone ingrowth(spot weld) was observed in 20 femoral component(80%), mainly junction of Gruen zone I and II, and VI and VII of porous coating area. The radioluccnt line around the femoral component was obsrved in 23
cases(92%),
mainly Gruen Zone I and IV, but it was thinner than 2mm and there was no thigh pain, no subsidence or migration of stem and no progressive widening of line except three cases. Among those three cases, one cases showed clinical and radiologic
loosening
of femoral component, so we performed revision total hip replacement. And other two cases are under close observation. No loosening was observed in acetabular components.
The cementless total hip replacement in patients older than sixty years showed satisfactory results despite of poor bone quality and osteoposis.
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