Adaptations of ligamentum teres in ischemic necrosis of human femoral head

Hsiang Ho Chen, Anna Fen Yau Li, Kung Chia Li, Jiunn Jer Wu, Tain Shiung Chen, Maw Chang Lee

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32 Citations (Scopus)

Abstract

Little is known about the biomechanical properties of human ligamentum teres. To more fully understand the ligamentum teres, its dimensions and mechanical properties were measured in 22 cases of acute fracture of the femoral neck and 21 cases of ischemic necrosis of the femoral head. The specimens first were preconditioned and then loaded to failure with a testing machine at a fast strain rate of 100% s-1. The ischemic necrosis group had a significantly larger volume (3.09 ± 1.81 ml versus 1.30 ± 0.62 ml) and cross section area (65.3 ± 59.1 mm2 versus 30.6 ± 27.2 mm2) than did the acute fracture group. The farmer also had a significantly greater ultimate load (234 ± 168 N versus 130 ± 111 N) and strain energy to failure (1.22 ± 1.04 J versus 0.41 ± 0.39 J), but a significantly smaller linear modulus (4.72 ± 3.31 MPa versus 8.69 ± 7.97 MPa) than did the latter. Histologic studies showed differences in the amount of organized collagen and components of subsynovial tissue between the 2 groups. Mechanical and morphologic adaptations of the ligamentum teres in a group of ischemic femoral heads are described, and a possible biomechanical role is suggested for the ligamentum teres in the hip joint in conjunction with the ischemic necrosis of the femoral head.

Original languageEnglish
Pages (from-to)268-275
Number of pages8
JournalClinical Orthopaedics and Related Research
Issue number328
Publication statusPublished - 1996
Externally publishedYes

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

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    Chen, H. H., Li, A. F. Y., Li, K. C., Wu, J. J., Chen, T. S., & Lee, M. C. (1996). Adaptations of ligamentum teres in ischemic necrosis of human femoral head. Clinical Orthopaedics and Related Research, (328), 268-275.