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Science 10 July 1964:
Vol. 145. no. 3628, pp. 156 - 157
DOI: 10.1126/science.145.3628.156
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Articles

Femoral Expansion in Aging Women: Implications for Osteoporosis and Fractures

Richmond W. Smith Jr. 1 and Richard R. Walker 1

1 Division of Endocrinology, Henry Ford Hospital, Detroit 2, Michigan

In femoral radiographs of 2030 aging women, the diameter of the midshaft periosteum increased as cortical thickness declined. Since the cortical area enlarged, periosteal accretion exceeded endosteal resorption. Since the section modulus increased more than did cortical area, the ratio of flexural failure resistance to crush resistance increased, in apparent contrast to the changes observed in the femoral neck.


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