Errors in the identification of the transepicondylar and anteroposterior axes of the distal femur in total knee replacement using minimally-invasive and conventional approaches: A CADAVER STUDY

W. P. Yau; A. Leung; K. G. Liu; C. H. Yan; L. S. Wong; K. Y. Chiu

doi:10.1302/0301-620X.90B4.19841

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Errors in the identification of the transepicondylar and anteroposterior axes of the distal femur in total knee replacement using minimally-invasive and conventional approaches

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Errors in the identification of the transepicondylar and anteroposterior axes of the distal femur in total knee replacement using minimally-invasive and conventional approaches

Yau WP, Leung A, Liu KG, Yan CH, Wong LS, Chiu KY. Errors in the identification of the transepicondylar and anteroposterior axes of the distal femur in total knee replacement using minimally-invasive and conventional approaches. J Bone Joint Surg Br. 2008;90-B(4):520-526. doi:10.1302/0301-620X.90B4.19841

Yau, W. P., et al. “Errors in the identification of the transepicondylar and anteroposterior axes of the distal femur in total knee replacement using minimally-invasive and conventional approaches.” The Journal of Bone & Joint Surgery British Volume, vol. 90-B, no. 4, 2008, pp. 520-526., https://doi.org/10.1302/0301-620X.90B4.19841

Yau, W. P., Leung, A., Liu, K. G., Yan, C. H., Wong, L. S., & Chiu, K. Y. (2008). Errors in the identification of the transepicondylar and anteroposterior axes of the distal femur in total knee replacement using minimally-invasive and conventional approaches. The Journal of Bone & Joint Surgery British Volume, 90-B(4), 520-526. https://doi.org/10.1302/0301-620X.90B4.19841

Yau, W. P., Leung, A., Liu, K. G., Yan, C. H., Wong, L. S. and Chiu, K. Y. (2008) “Errors in the identification of the transepicondylar and anteroposterior axes of the distal femur in total knee replacement using minimally-invasive and conventional approaches.” The Journal of Bone & Joint Surgery British Volume, 90-B(4), pp. 520-526. Available at: https://doi.org/10.1302/0301-620X.90B4.19841

Yau, W. P., A. Leung, K. G. Liu, C. H. Yan, L. S. Wong, and K. Y. Chiu. “Errors in the identification of the transepicondylar and anteroposterior axes of the distal femur in total knee replacement using minimally-invasive and conventional approaches.” The Journal of Bone & Joint Surgery British Volume 90-B, no. 4 (2008): 520-526. https://doi.org/10.1302/0301-620X.90B4.19841

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Abstract

We have investigated the errors in the identification of the transepicondylar axis and the anteroposterior axis between a minimally-invasive and a conventional approach in four fresh-frozen cadaver knees. The errors in aligning the femoral prosthesis were compared with the reference transepicondylar axis as established by CT.

The error in the identification of the transepicondylar axis was significantly higher in the minimal approach (4.5° of internal rotation, sd 4) than in the conventional approach (3° of internal rotation, sd 4; p < 0.001). The errors in identifying the anteroposterior axis in the two approaches were 0° (sd 5) and 1.8° (sd 5) of internal rotation, respectively (p < 0.001).

Correspondence should be sent to Dr W. P. Yau; e-mail: peterwpy@hkucc.hku.hk

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