On thirty-five Hybrid total hip arthroplasty that had been followed for three to five years, an average of 4.2 years, a retrospective radiographic study was done to assess bone changes of the proximal femur containing cemented femoral stem using
a
personal computer linked digital camera in a group oa asymptomatic patients.
Femoral neck atrophy including porosis with cancelization and round off were noted 20 femurs(43%) has remained unchanged from the original femur. Regarding to change of cortical dimensions, 20 hips(78%) around the middle of the stem, 20 hips(83%)
around
the distal tip of the stem remained unchanged from the original femoral cortex. More than lmm cortial thickenning occurred only around the middle and the distal tip of the stem in five hips(14%) and cortical thinning developed in the calcar,
around
the
middle and the distal tip of the stem in six(17%), three(8%), one(2%), respectively.
In summary, most femur remained unchanged or minimally changed on 3-5 years follow up radiographs of cemented femoral stem and digitization of radiographs could be useful tool to assess the follow-up radiographs of total hip arthroplasty.
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