Tensile Strength of a New Suture for Fixation of Tendon Grafts When Using a Weave Technique

Toshikazu Tanaka, Chunfeng Zhao, Anke M. Ettema, Mark E. Zobitz, Kai Nan An, Peter C. Amadio

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Purpose: To evaluate a new corner stitch construct for tendon graft or tendon transfer fixation and compare the tensile strength with a conventional central cross-suture design in human cadaver tendons. Methods: Flexor digitorum profundus tendons of the index, middle, and ring fingers (48 total) were used as recipients and palmaris longus, extensor indicis proprius, and extensor digitorum communis tendons of the index finger (48 total) were used as grafts from 16 fresh-frozen human cadaver hands. We compared the cross-stitch technique with a new corner stitch technique in tendon repairs made with 1, 2, or 3 weaves (8 per group). Tendons were sutured at each weave with either 2 full-thickness cross-stitches or 4 partial-thickness corner stitches of 4-0 nylon. Mattress sutures also were placed through the free tendon end for each repair type. The tensile strength of the tendon-graft composite was measured with a materials testing machine. Results: The tensile strength of the repairs increased significantly with the number of weaves. When 2 or 3 weaves were used with the corner stitch or when 3 weaves were used with the cross-stitch, the repairs were significantly stronger. Although no significant difference in strength to failure was noted when comparing cross and corner stitches with equivalent numbers of weaves, qualitatively there was a difference in mode of failure with the 3-weave corner stitches failing primarily by intrasubstance tendon failure and the 3-weave cross-stitch repairs failing by tendon pullout. Conclusions: The corner stitch is as strong as conventional cross-stitch repairs and its superficial placement may be more favorable to tendon blood supply. This repair may be advantageous for clinical applications.

Original languageEnglish (US)
Pages (from-to)982-986
Number of pages5
JournalJournal of Hand Surgery
Volume31
Issue number6
DOIs
StatePublished - Jul 1 2006

Keywords

  • Human
  • in vitro
  • suture
  • tendon graft
  • tensile strength

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

Fingerprint Dive into the research topics of 'Tensile Strength of a New Suture for Fixation of Tendon Grafts When Using a Weave Technique'. Together they form a unique fingerprint.

Cite this