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Femoral neck buttressing: a radiographic and histologic analysis
1University of Arizona Health Sciences Center, Tucson 85724, USA.
Skeletal Radiology
|December 29, 2000
Summary
Medial femoral neck buttressing, a bone deposition on the femoral neck, occurs in 50% of patients undergoing total hip arthroplasty. This finding suggests it may be a response to increased joint forces in the hip.
Area of Science:
- Orthopedic Surgery
- Radiology
- Bone Histology
Background:
- Medial femoral neck buttressing is a radiographic finding observed in hip joints.
- Its incidence and underlying mechanisms require further investigation.
Purpose of the Study:
- To determine the incidence of medial femoral neck buttressing.
- To analyze radiographic and histologic features associated with this finding.
- To explore potential biomechanical factors contributing to its development.
Main Methods:
- Retrospective analysis of 113 patients undergoing total hip arthroplasty.
- Evaluation of pre-operative anteroposterior pelvic radiographs for biomechanical parameters.
- Review of demographic data and histologic examination of surgical specimens.
Main Results:
- The incidence of medial femoral neck buttressing was 50%, higher in women (56%) than men (41%).
- Buttressing correlated with increased neck-shaft angles and smaller femoral neck diameters.
- Histology confirmed buttressing as periosteal bone deposition without fracture.
Conclusions:
- Medial femoral neck buttressing likely results from increased joint reactive forces transmitted through the femoral neck.
- Elevated neck-shaft angles may be associated with these increased forces.