Biomechanical comparison of double grasping repair versus cross-locked cruciate flexor tendon repair

C. Liam Dwyer, D. Dean Dominy, Timothy E. Cooney, Richard Englund, Leonard Gordon, John D. Lubahn

Research output: Contribution to journalReview article

4 Scopus citations

Abstract

Purpose: This study was conducted to compare the in vitro biomechanical properties of tensile strength and gap resistance of a double grasping loop (DGL) flexor tendon repair with the established four-strand cross-locked cruciate (CLC) flexor tendon repair, both with an interlocking horizontal mattress (IHM) epitendinous suture. The hypothesis is that the DGL-IHM method which utilizes two looped core sutures, grasping and locking loops, and a single intralesional knot will have greater strength and increased gap resistance than the CLC-IHM method. Methods: Forty porcine tendons were evenly assigned to either the DGL-IHM or CLC-IHM group. The tendon repair strength, 2-mm gap force and load to failure, was measured under a constant rate of distraction. The stiffness of tendon repair was calculated and the method of repair failure was analyzed. Results: The CLC-IHM group exhibited a statistically significant greater resistance to gapping, a statistically significant higher load to 2-mm gapping (62.0 N), and load to failure (99.7 N) than the DGL-IHM group (37.1 N and 75.1 N, respectively). Ninety percent of CLC-IHM failures were a result of knot failure whereas 30 % of the DGL-IHM group exhibited knot failure. Conclusions: This study demonstrates that the CLC-IHM flexor tendon repair method better resists gapping and has a greater tensile strength compared to the experimental DGL-IHM method. The authors believe that while the DGL-IHM provides double the number of sutures at the repair site per needle pass, this configuration does not adequately secure the loop suture to the tendon, resulting in a high percentage of suture pullout and inability to tolerate loads as high as those of the CLC-IHM group.

Original languageEnglish (US)
Pages (from-to)16-22
Number of pages7
JournalHand
Volume10
Issue number1
DOIs
StatePublished - Jan 1 2015

All Science Journal Classification (ASJC) codes

  • Surgery
  • Orthopedics and Sports Medicine

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  • Cite this

    Dwyer, C. L., Dominy, D. D., Cooney, T. E., Englund, R., Gordon, L., & Lubahn, J. D. (2015). Biomechanical comparison of double grasping repair versus cross-locked cruciate flexor tendon repair. Hand, 10(1), 16-22. https://doi.org/10.1007/s11552-014-9728-5