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Structural and geometric changes in iliac bone: relationship to normal aging and osteoporosis
J Foldes1, A M Parfitt, M S Shih
1Department of Medicine, Henry Ford Hospital, Detroit, Michigan.
Summary
Postmenopausal osteoporosis is linked to reduced bone volume and altered bone surface characteristics in both cancellous and cortical bone. These changes are evident in iliac bone biopsies and forearm bone density measurements.
Area of Science:
- Bone biology
- Osteoporosis research
- Gerontology
Background:
- Bone loss is a hallmark of aging and osteoporosis.
- Understanding structural bone changes is crucial for diagnosing and treating bone diseases.
Purpose of the Study:
- To compare bone volume and surface indices in healthy premenopausal, postmenopausal women, and patients with postmenopausal osteoporosis.
- To investigate age-related changes in bone structure in healthy women.
Main Methods:
- Analysis of intact, full-thickness transiliac bone biopsies from 47 healthy women and 82 osteoporotic patients.
- Measurement of cancellous and cortical bone volume and surface indices.
- Forearm bone densitometry using single-photon absorptiometry.
Main Results:
- Healthy women showed age-related loss of cancellous bone but not cortical thickness, despite reduced forearm bone density.
- Osteoporotic patients had reduced iliac bone thickness, smaller bone volume indices (cancellous and cortical), and altered bone surface/volume ratios.
- Cancellous bone constituted approximately one-third of total bone volume and two-thirds of bone surface.
Conclusions:
- Postmenopausal osteoporosis is associated with significant reductions in both cancellous and cortical bone volume.
- Alterations in bone surface characteristics are observed in osteoporotic bone compared to healthy bone.
- Iliac bone biopsy provides valuable structural information for understanding osteoporosis.