Effects of Tensioning Errors in Split Transfers of Tibialis Anterior and Posterior Tendons by Stephen J. Piazza, Robert L. Adamson, Matthew F. Moran, James.

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Presentation transcript:

Effects of Tensioning Errors in Split Transfers of Tibialis Anterior and Posterior Tendons by Stephen J. Piazza, Robert L. Adamson, Matthew F. Moran, James O. Sanders, and Neil A. Sharkey J Bone Joint Surg Am Volume 85(5): May 1, 2003 ©2003 by The Journal of Bone and Joint Surgery, Inc.

Cadaver specimens were mounted in the test apparatus by attachment to the foot-plate and tibial mounting shaft. Stephen J. Piazza et al. J Bone Joint Surg Am 2003;85: ©2003 by The Journal of Bone and Joint Surgery, Inc.

Illustration of the 1-cm-wide aluminum block that simulated the natural junction of the medial and lateral tendon halves. Stephen J. Piazza et al. J Bone Joint Surg Am 2003;85: ©2003 by The Journal of Bone and Joint Surgery, Inc.

Schematic representation of the muscle moment arm and its measurement with the tendon excursion method. Stephen J. Piazza et al. J Bone Joint Surg Am 2003;85: ©2003 by The Journal of Bone and Joint Surgery, Inc.

Subtalar moment arms of the tibialis posterior, measured at six subtalar joint angles, prior to surgery (A) and following an ideally balanced split tendon transfer (B). Stephen J. Piazza et al. J Bone Joint Surg Am 2003;85: ©2003 by The Journal of Bone and Joint Surgery, Inc.

Subtalar joint moment arms of the tibialis posterior in the neutral position plotted against the percent change in tension balance. Stephen J. Piazza et al. J Bone Joint Surg Am 2003;85: ©2003 by The Journal of Bone and Joint Surgery, Inc.

Subtalar moment arms of the tibialis anterior, measured at six subtalar joint angles, prior to surgery (A) and following an ideally balanced split tendon transfer (B). Stephen J. Piazza et al. J Bone Joint Surg Am 2003;85: ©2003 by The Journal of Bone and Joint Surgery, Inc.

Subtalar joint moment arms of the tibialis anterior in the neutral position plotted against the percent change in tension balance. Stephen J. Piazza et al. J Bone Joint Surg Am 2003;85: ©2003 by The Journal of Bone and Joint Surgery, Inc.