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COMPUTED TOMOGRAPHY ASSISTED OSTEODENSITOMETRY IN TOTAL HIP ARTHROPLASTY
Author(s) -
Pandit Salil,
Graydon Andrew,
Bradley Lyndon,
Walker Cameron,
Pitto Rocco
Publication year - 2006
Publication title -
anz journal of surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.426
H-Index - 70
eISSN - 1445-2197
pISSN - 1445-1433
DOI - 10.1111/j.1445-2197.2006.03866.x
Subject(s) - medicine , periprosthetic , harris hip score , cancellous bone , bone density , radiological weapon , stress shielding , femur , cortical bone , total hip arthroplasty , quantitative computed tomography , bone remodeling , orthopedic surgery , surgery , arthroplasty , radiology , dentistry , nuclear medicine , osteoporosis , implant , anatomy
Background: Periprosthetic bone remodelling is an important issue in total hip arthroplasty, which can compromise long‐term outcomes. The aim of this study was to evaluate bone remodelling of the proximal femur with an uncemented hydroxyapatite‐coated taper stem. Methods: Twenty‐three patients (27 hips) were included in this study. The mean age of the patients at the index operation was 57.2 years. There were 15 men and 8 women. Bone remodelling was assessed with quantitative computed tomography and the clinical outcome determined using the Harris Hip Scores. The mean preoperative Harris Hip Score was 38 points and at the 1‐year follow up, it was rated 96 points. All hips were radiologically stable. Results: At the 1‐year follow up, we found a greater bone‐density loss of the cancellous bone (ranging from 16.7 to 28.2%) compared with the cortical bone (ranging from 5.3 to 7.8%). A strong correlation was found between the low density of the cortical bone at the index operation and a higher loss of bone density at the follow up. Conclusion: The newly designed tapered stem showed good clinical and radiological outcomes with a proximal femoral bone loss that compares favourably with other studies.