Tendon-grasping strength of various suture configurations for rotator cuff repair


Hapa O., Barber F. A., Sünbüloğlu E., Kocabey Y., Sarkalkan N., Baysal G.

Knee Surgery, Sports Traumatology, Arthroscopy, vol.19, no.10, pp.1749-1754, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 19 Issue: 10
  • Publication Date: 2011
  • Doi Number: 10.1007/s00167-010-1322-y
  • Journal Name: Knee Surgery, Sports Traumatology, Arthroscopy
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1749-1754
  • Keywords: Double mattress stitch, Lasso loop, Mason-Allen, Rotator cuff repair
  • Hatay Mustafa Kemal University Affiliated: Yes

Abstract

Purpose: The purpose of the present study is to evaluate the mechanical performance and initial strength of the arthroscopic Mason-Allen, double mattress, inclined Mason-Allen, and lasso loop stitch configurations. Methods: Using 36 sheep infraspinatus tendons, tendon widths and thicknesses were measured with a digital caliper to confirm standardization of the tendons. Four different stitch configurations (Mason-Allen, inclined Mason-Allen, double mattress, and lasso loop) were biomechanically tested with cyclic loading followed by load to failure testing. The cyclic elongation, peak-to-peak displacement, ultimate tensile strength, stiffness, and mode of failure were recorded. Results: Mean tendon widths and thicknesses were statistically the same. The lasso loop (0.7 ± 0.1 mm) demonstrated a mean cyclic elongation greater than the Mason-Allen (0.5 ± 0.3 mm) and double mattress (0.5 ± 0.3 mm) groups (P = 0.011; P = 0.013). No differences were found in ultimate failure load, stiffness, and peak-to-peak displacement for the Mason-Allen (mean 99 ± 42 N, 39 ± 9 N/mm, 0.6 ± 0,1 mm), inclined Mason-Allen (113 ± 52 N, 44 ± 14 N/mm, 0.5 ± 0.1 mm), double mattress stitch (119 ± 68 N, 45 ± 10 N/mm, 0.5 ± 0.1 mm), or lasso loop (100 ± 38 N, 42 ± 7 N/mm, 0.5 ± 0.1 mm) groups (n.s.). Each specimen failed at the suture-tendon interface. Three specimens (two Mason-Allen and one inclined Mason-Allen) failed during cyclic testing. Conclusion: Conventional Mason-Allen configuration can be applied with double-loaded suture anchor safely. Recent modifications of the configurations offer no biomechanical advantage. © 2010 Springer-Verlag.