Local Compressive Strength at the Middle of the Weight-bearing Surface of the Femoral Head and Talar Dome : A Biomechanical Study

Authors

  • Rapin Phimolsarnti Department of Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University
  • Ekavit Keyurapan Department of Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University
  • Suchart Benjarassamerote Department of Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University
  • Thossart Harnroongroj Department of Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University

Keywords:

Compressive strength, weight bearing surface, femoral head, talar dome, universal testing machine.

Abstract

Objective : To compare the local compressive strength at the middle of the weight bearing surface of the femoral head and talar dome.
Design : Cadaveric and comparative experimental study. The compressive strength of the talar dome and the femoral head were measured and compared.
Background : The prevalence of late collapse of femoral head from avascular osteonecrosis is higher than that of the talar dome. The femoral head and acetabulum form a hip joint with monoarticulation whereas the talus itself has several articulations with several bones, so the talar dome distributes load more effectively from it the surroundings than does the femoral head. Compressive strength of the weight bearing surface of the femoral head and talar dome, however, may play a role in late collapse.
Methods : Ten fresh cadaveric normal adult femoral heads and tali were obtained. A compressive load was applied through an indenter at the middle of the superior quadrant of the femoral head and talar dome by using a universal testing machine until a maximum load was obtained. The maximum load and depth of depression at maximum load were recorded.
Results : The middle of the weight bearing surface of the femoral head could withstand an average maximum pressure of 30.42 MPa. Its stillness was 929.04 N/mm and its depth of depression was 1.11 mm. The corresponding figures for the talar dome were 49.64 Mpa, 1631.65 N/mm, and 0.96 mm respectively.
Conclusion : This study showed that local compressive strength at the middle of the weight bearing surface of the talar dome was 1.63 times greater than that of the femoral head.
Relevance : This finding may explain the higher prevalence of late collapsing avascular necrosis of the femoral head than that of the talar dome.

Downloads

Published

01-02-2004

How to Cite

Phimolsarnti, R. ., Keyurapan, E. ., Benjarassamerote, S., & Harnroongroj, T. . (2004). Local Compressive Strength at the Middle of the Weight-bearing Surface of the Femoral Head and Talar Dome : A Biomechanical Study. Siriraj Medical Journal, 56(2), 69–72. Retrieved from https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/245487

Issue

Vol. 56 No. 2 (2004): February

Section

Original Article

License

Authors who publish with this journal agree to the following conditions:

Copyright Transfer

In submitting a manuscript, the authors acknowledge that the work will become the copyrighted property of Siriraj Medical Journal upon publication.

License

 Articles are licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0). This license allows for the sharing of the work for non-commercial purposes with proper attribution to the authors and the journal. However, it does not permit modifications or the creation of derivative works.

Sharing and Access

Authors are encouraged to share their article on their personal or institutional websites and through other non-commercial platforms. Doing so can increase readership and citations.