Citation

Yang KH, Shen KL, Demetropoulos CK, King AI, Kolodziej P, Levine RS, Fitzgerald RH. J. Biomech. Eng. 1996; 118(4): 575-578.

Affiliation

Bioengineering Center, Wayne State University, Detroit, MI 48201, USA.

Copyright

(Copyright © 1996, American Society of Mechanical Engineers)

DOI

unavailable

PMID

8950662

Abstract

In an attempt to test the hypothesis of spontaneous hip fracture, seven pairs of femurs, with ages ranging from 59 to 90, were tested under two loading conditions designed to simulate muscular contraction. Simulated iliopsoas contraction produced femoral neck fractures at an average normalized ultimate load of 5.2 +/- 0.8 times body weight. Simulated gluteus medius contraction produced sub-/inter-trochanteric fractures at an average normalized ultimate load of 4.1 +/- 0.6 times body weight. The average ultimate load for all specimens was 3040 +/- 720 N. Fracture patterns produced by both loading conditions were clinically relevant. The results from this study suggest that abnormal contraction produced by major rotator muscles could induce hip fracture.

Language: en