Biomechanical analysis of partial flexor tendon lacerations in zone II of human cadavers

The Journal of Hand Surgery
David W ManningDaniel P Mass

Abstract

The aims of this study were to examine nonrepaired 90% partial lacerations of human cadaver flexor digitorum profundus (FDP) tendon after simulated active motion, and to assess the residual ultimate tensile strength. Partial, transverse zone II flexor tendon lacerations were made in the volar 90% of the tendon substance in 10 FDP tendons from 5 fresh-frozen human cadaver hands. The tendons were cycled in the curvilinear fashion described by Greenwald 500 times to a tension 25% greater than the maximum in vivo active FDP flexion force measured by Schuind and colleagues. The tendons were then loaded to failure using the same curvilinear model. No tendons ruptured during cycling. Triggering occurred in 3 tendons. All 3 began triggering early in the cycling process, and continued to trigger throughout the remainder of the 500 cycles. The observed triggering mechanics in each case involved the interaction of the proximal face of the lacerated tendon with Camper's chiasm and the pulley edges during extension. The load to failure value of the 90% partially lacerated tendons averaged 141.7 +/- 13 N (mean +/- standard deviation). Tendon failure occurred by delamination of the intact collagen fibers from the distal, discontinuous 90% of ...Continue Reading

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Citations

Feb 1, 2013·Journal of Biomechanical Engineering·Jaclyn KondratkoRay Vanderby
Jul 15, 2015·Journal of Biomechanics·Jaclyn Kondratko-MittnachtRay Vanderby
May 23, 2014·Journal of Biomechanical Engineering·Marco PensalfiniRay Vanderby
Jul 4, 2012·Indian Journal of Plastic Surgery : Official Publication of the Association of Plastic Surgeons of India·R K Patil, A R Koul
Aug 15, 2015·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Diego López-NájeraJosé M Carrillo-Poveda
Apr 30, 2017·Hand : Official Journal of the American Association for Hand Surgery·Jared M MahylisAdam J Mirarchi

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