V-Y延长指背腱膜终腱止点重建术治疗陈旧性锤状指的生物力学实验研究

doi:10.13418/j.issn.1001-165x.2021.03.015

Abstract

Abstract: Objective　To discuss the biomechanics of V-Y extending terminal tendon (TT) for distal attachment to treat chronic mallet fingers (tendon-bone or partial bony).　Methods　Twelve fingers were randomly divided into the following two groups based upon the repair technique. A control group: 1mm TT was removed at the insertion, the distal TT was attached by pull-out; an experimental group: 1mm TT was removed at the insertion, the proximal portion of the TT was cut with a “V” incision which was then repaired in a “Y” fashion, and the distal TT was attached by pull-out. Biomechanics experimental outputs were calculated and statistically analyzed.　Results　As the rupture (load failure) occurred, the experimental group: 2 specimens (accounting for 33.3%) failed by suture breakages and 4 cases (accounting for 66.7%) failed by suture pulled out from the tendon at V-Y suture and all sutures were prolonged at attachment. Suture breakages happened in all specimens of the control group. There was significant difference between the two groups (P<0.05) in the load failure while no significant difference (P>0.05) in the maximum displacement. All sutures were prolonged at the attachment when the tendon-bone gap reached 1mm in both groups and the tendon-tendon was closely sticked at V-Y suture. There was significantly different between the two groups (P＜0.05) in the displacement while no significant difference (P>0.05) in the load and stiffness. Conclusions The load, displacement and stiffness of 1mm tendon-bone gap were more clinically meaningful than the repair failure force and maximum displacement. Reattachment with V-Y suture effectively extended TT and repaired tendon-bone gap, while unaffected the biomechanical properties of TT.

Key words: , Chronic mallet finger, 　V-Y suture, 　Distal reattachment, 　Biomechanics

CLC Number:

Wang Gaofei, Zhang Zhufeng, Wei Zhuang. Biomechanical study on V-Y extending terminal tendon of extensor tendon for distal attachment inhuman cadaver hands[J]. Chinese Journal of Clinical Anatomy, 2021, 39(3): 330-335.

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Biomechanical study on V-Y extending terminal tendon of extensor tendon for distal attachment inhuman cadaver hands

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