Measurements of Talus for Sizing Talar Body Prosthesis

Authors

  • Thossart Harnroongroj Department of Orthopaedic Surgery and Department of Anatomy, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
  • Luck Chutithammanun Department of Orthopaedic Surgery and Department of Anatomy, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand

Abstract

Background: Talar body prosthesis insertion is an option for preserving the function of the ankle and foot that suffers from avascular necrosis of talus. However, talus size varies between individuals. Knowledge of the dimensions and the curve angles of the talus is necessary for sizing talar body prosthesis.

Objective: To measure the dimensions and the curve angles of the talus

Design: Cadaveric study

Material & Methods: Fifty-seven pairs of tali were harvested from 57 adult cadavers and cleaned of soft tissue around the talus. Talar body, neck and posterior facet were measured in terms of dimensions and curve angles.

Result: Measurements of the left tali showed that the average anterior and posterior widths of the talar dome were 27.09 mm (SD 1.89) and 19.69 mm (SD 1.73) respectively. The vertical inclination angle of the medial and the lateral surfaces were 100.45 (SD 5.56) and 96.04 (SD 4.41) respectively. The anteroposterior inclination angles of the medial and the lateral borders of the talar dome were 4.79 (2.76) and 7.99 (SD 4.49) respectively. The depths of the anterior end and posterior third of trochlear were 1.33 mm (SD 0.32) and 0.63 mm (SD 0.43) respectively. The curve angles of the anterior and the posterior third of the trochlear were 174.64 (SD 5.61) and 174.72 (SD 5.49) respectively. The curve angle of the medial and the lateral talar dome were 129.20 (SD 7.56) and 124.660 (SD 9.49) respectively. The thickness was 23.95 mm (SD 1.73). The length, width, depth and curve angle of the posterior facet were 28.51 mm (SD 1.97), 18.17 mm (SD 1.59), 6.32 mm (SD 0.89) and 134.19 (SD 5.74) respectively. The angle between the long axis of the posterior facet and the long axis of the talar body was 49.25 (SD 5.38). The length, width and thickness of the left talar neck were 23.65 mm (SD 1.89), 26.14 mm (SD 2.13) and 22.43 mm (SD 1.80) respectively. The corresponding figures for the right talus were 27.47 mm (SD 2.03), 19.12 mm (SD 1.30), 99.57 (SD 6.78), 96.45 (SD 5.03), 4.25 (SD 4.09), 6.76 (SD 3.15), 1.37 mm (SD 0.56), 0.65 mm (SD 0.44), 167.04 (SD 4.10), 174.72 (SD 5.49), 129.39 (SD 5.53), 119.16 (SD 7.96), 24.06 mm (SD 2.03), 28.51 mm (SD 2.52), 18.33 mm (SD 2.01), 6.30 mm (SD 0.95), 133.51 (SD 5.03) 47.26 (SD 5.93), 23.83 mm (SD 2.00), 26.13 mm (SD 2.39) and 22.59 mm (SD 1.91) respectively. Statistical analysis showed no significant difference in the dimensions and the curve angles of the left and right tali. But female talus is significantly smaller than male talus.

Conclusion: There is no significant difference between the left and right tali in terms of dimensions and curve angles. Female talus is smaller than male.

Relevance: Knowledge of the values of the measurements can be applied for sizing talar body prosthesis. Measurements of Talus for Sizing Talar Body

References

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Published

2003-09-30

How to Cite

1.
Harnroongroj T, Chutithammanun L. Measurements of Talus for Sizing Talar Body Prosthesis. Thai J Surg [Internet]. 2003 Sep. 30 [cited 2024 Dec. 23];24(3):91-6. Available from: https://he02.tci-thaijo.org/index.php/ThaiJSurg/article/view/242953

Issue

Vol. 24 No. 3 (2003): July - September

Section

Original Articles

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Articles must be contributed solely to The Thai Journal of Surgery and when published become the property of the Royal College of Surgeons of Thailand. The Royal College of Surgeons of Thailand reserves copyright on all published materials and such materials may not be reproduced in any form without the written permission.