Please use this identifier to cite or link to this item: http://ahro.austin.org.au/austinjspui/handle/1/12434
Title: Trabecular and cortical microstructure and fragility of the distal radius in women.
Authors: Bala, Yohann;Bui, Quang Minh;Wang, Xiao-Fang;Iuliano, Sandra;Wang, Qingju;Ghasem-Zadeh, Ali;Rozental, Tamara D;Bouxsein, Mary L;Zebaze, Roger M D;Seeman, Ego
Affiliation: Endocrine Center, Austin Health, University of Melbourne, Melbourne, Australia.
Issue Date: 1-Apr-2015
Citation: Journal of Bone and Mineral Research : the Official Journal of the American Society For Bone and Mineral Research; 30(4): 621-9
Abstract: Fragility fractures commonly involve metaphyses. The distal radius is assembled with a thin cortex formed by fusion (corticalization) of trabeculae arising from the periphery of the growth plate. Centrally positioned trabeculae reinforce the thin cortex and transfer loads from the joint to the proximal thicker cortical bone. We hypothesized that growth- and age-related deficits in trabecular bone disrupt this frugally assembled microarchitecture, producing bone fragility. The microarchitecture of the distal radius was measured using high-resolution peripheral quantitative computed tomography in 135 females with distal radial fractures, including 32 girls (aged 7 to 18 years), 35 premenopausal women (aged 18 to 44 years), and 68 postmenopausal women (aged 50 to 76 years). We also studied 240 fracture-free controls of comparable age and 47 healthy fracture-free premenopausal mother-daughter pairs (aged 30 to 55 and 7 to 20 years, respectively). In fracture-free girls and pre- and postmenopausal women, fewer or thinner trabeculae were associated with a smaller and more porous cortical area (r = 0.25 to 0.71 after age, height, and weight adjustment, all p < 0.05). Fewer and thinner trabeculae in daughters were associated with higher cortical porosity in their mothers (r = 0.30 to 0.47, all p < 0.05). Girls and premenopausal and postmenopausal women with forearm fractures had 0.3 to 0.7 standard deviations (SD) fewer or thinner trabeculae and higher cortical porosity than controls in one or more compartment; one SD trait difference conferred odds ratio (95% confidence interval) for fracture ranging from 1.56 (1.01-2.44) to 4.76 (2.86-7.69). Impaired trabecular corticalization during growth, and cortical and trabecular fragmentation during aging, may contribute to the fragility of the distal radius. © 2014 American Society for Bone and Mineral Research.
Internal ID Number: 25327362
URI: http://ahro.austin.org.au/austinjspui/handle/1/12434
DOI: 10.1002/jbmr.2388
URL: http://www.ncbi.nlm.nih.gov/pubmed/25327362
Type: Journal Article
Subjects: BONE FRAGILITY
BONE GROWTH
DISTAL RADIUS
HR-PQCT
METAPHYSES
MICROSTRUCTURE
Appears in Collections:Journal articles

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