Distal attachment of flexor tendon allograft: A biomechanical study of different reconstruction techniques in human cadaver hands

Zhuang Wei, Andrew R. Thoreson, Peter C. Amadio, Kai Nan An, Chunfeng Zhao

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

We compared the mechanical force of tendon-to-bone repair techniques for flexor tendon reconstruction. Thirty-six flexor digitorum profundus (FDP) tendons were divided into three groups based upon the repair technique: (1) suture/button repair using FDP tendon (Pullout button group), (2) suture bony anchor using FDP tendon (Suture anchor group), and (3) suture/button repair using FDP tendon with its bony attachment preserved (Bony attachment group). The repair failure force and stiffness were measured. The mean load to failure and stiffness in the bony attachment group were significantly higher than that in the pullout button and suture anchor groups. No significant difference was found in failure force and stiffness between the pullout button and suture anchor groups. An intrasynovial flexor tendon graft with its bony attachment has significantly improved tensile properties at the distal repair site when compared with a typical tendon-to-bone attachment with a button or suture anchor. The improvement in the tensile properties at the repair site may facilitate postoperative rehabilitation and reduce the risk of graft rupture.

Original languageEnglish (US)
Pages (from-to)1720-1724
Number of pages5
JournalJournal of Orthopaedic Research
Volume31
Issue number11
DOIs
StatePublished - Nov 1 2013

Keywords

  • allograft
  • biomechanics
  • distal repair
  • flexor tendon
  • suture anchor

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

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