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Bone strength influences periprosthetic bone loss after hip arthroplasty
Mohammad Arabmotlagh1, Thorsten Hennigs, Joerg Warzecha
1Department of Orthopaedic Surgery, The University Hospital of Frankfurt, Frankfurt am Main, Germany. m.arabmotlagh@t-online.de
Clinical Orthopaedics and Related Research
|October 22, 2005
Summary
Preoperative bone strength, assessed by lumbar spine T-score and femoral thickness, predicts bone loss after total hip arthroplasty. Lower bone strength indicates greater bone loss in the calcar femoris.
Area of Science:
- Orthopedic surgery
- Bone densitometry
- Biomedical engineering
Background:
- Periprosthetic bone loss is a concern after total hip arthroplasty (THA).
- Assessing preoperative bone strength may help predict bone loss.
- Lumbar spine T-score and femoral cortical thickness are indicators of bone strength.
Purpose of the Study:
- To determine if preoperative bone strength influences periprosthetic bone loss after cementless THA.
- To evaluate lumbar spine T-score and femoral cortical thickness as predictors of bone loss.
Main Methods:
- Prospective prognostic study (Level I evidence).
- 38 patients undergoing cementless THA were assessed.
- Dual-energy X-ray absorptiometry (DXA) measured bone density preoperatively and postoperatively.
- Radiographs assessed femoral cortical thickness.
Main Results:
- Periprosthetic bone loss was significantly influenced by preoperative bone strength.
- Patients with lower lumbar spine T-scores or femoral cortical thickness experienced greater bone loss in the calcar femoris (up to 54% over 2 years).
Conclusions:
- Preoperative bone strength is a reliable predictor of periprosthetic bone loss after THA.
- Assessing bone mineral density and femoral cortical thickness preoperatively can guide patient management.
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