Inter-sex differences in structural properties of aging femora: Implications on differential bone fragility: A cadaver study

Danijela Djonic, Petar Milovanovic, Slobodan Nikolic, Miomira Ivovic, Jelena Marinkovic, Thomas Beck, Marija Djuric

Research output: Contribution to journalArticle

Abstract

In this paper we examined age-related and sexspecific deterioration in bone strength of the proximal femur reflected in mechanical properties from dual energy X-ray absorptiometry (DXA)-based hip structural analysis (HSA) on a cadaveric sample from the Balkans. Cadaveric studies permit more precise measurement of HSA parameters and allow further analyses by micromorphometric methods. DXA and HSA analysis was performed on a total of 138 cadaveric proximal femora (63 female, 75 male, age range 20-101 years) from Belgrade. HSA parameters are reported for three standard regions of the proximal femur (narrow neck, intertrochanteric, and shaft). Major agerelated findings include an increase in the radius of gyration (first reported in this study), a decline in the cross-sectional area (CSA), a shift in the centroid towards the medial cortex, higher buckling ratios and lower section moduli. Whereas age appears to affect mostly the neck region in men, weakening is also evident in the intertrochanteric region in women, particularly after the age of 80. Aging femoral neck declines in bending strength and increases in buckling susceptibility. The reduced bone mass tends to be distributed farther from the centroidal axis (increase in radius of gyration with decline in CSA). Bone mass is preferentially lost from the lateral part of the cross-section shifting the centroid towards the medial cortex which may increase fragility of the lateral part during fall impact. Results of this study contribute to the epidemiologic data on gender differences and age trends in aging male and female femora.

Original languageEnglish (US)
Pages (from-to)449-457
Number of pages9
JournalJournal of Bone and Mineral Metabolism
Volume29
Issue number4
DOIs
StatePublished - Jul 1 2011

Keywords

  • Aging
  • Bone fragility
  • Bone strength
  • HSA
  • Proximal femur

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Orthopedics and Sports Medicine
  • Endocrinology

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