Journal
ENDOCRINE REVIEWS
Volume 28, Issue 2, Pages 151-164Publisher
ENDOCRINE SOC
DOI: 10.1210/er.2006-0029
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Minimal trauma fractures in bone diseases are the result of bone fragility. Rather than considering bone fragility as being the result of a reduced amount of bone, we recognize that bone fragility is the result of changes in the material and structural properties of bone. Abetter understanding of the contribution of each component of the material composition and structure and how these interact to maintain whole bone strength is obtained by the study of metabolic bone diseases. Disorders of collagen ( osteogenesis imperfecta and Paget's disease of bone), mineral content, composition and distribution ( fluorosis and osteomalacia); diseases of high remodeling ( postmenopausal osteoporosis, hyperparathyroidism, and hyperthyroidism) and low remodeling ( osteopetrosis, pycnodysostosis); and other diseases ( idiopathic male osteoporosis, corticosteroid-induced osteoporosis) produce abnormalities in the material composition and structure that lead to bone fragility. Observations in patients and in animal models provide insights on the biomechanical consequences of these illnesses and the nature of the qualities of bone that determine its strength.
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