Suture anchor versus screw fixation for greater tuberosity fractures of the humerus-a biomechanical study

Cheng Li Lin, Chih Kai Hong, I. Ming Jou, Chii Jeng Lin, Fong Chin Su, Wei Ren Su

Research output: Contribution to journalArticlepeer-review

Abstract

Suture anchors and screws are commonly used for fixation of humeral greater tuberosity (GT) fractures in either arthroscopic or open surgeries, but no biomechanical studies have been performed to compare the strength of fixation constructs using these two implants. This cadaveric study aimed to compare the biomechanical strength of three different fixation constructs in the management of GT fractures: Double-Row Suture Anchor Fixation (DR); Suture-Bridge Technique using suture anchors and knotless suture anchors (SB); and Two-Screw Fixation (TS). The experimental procedure was designed to assess fracture displacement after cyclic loading, failure load, and failure mode of the fixation construct. Significant differences were found among the SB (321N), DR (263N), and TS (187N) groups (SB>DR>TS, p<0.05) in the mean force of cyclic loading to create 3mm displacement. Regarding the mean force of cyclic loading to create 5mm displacement and ultimate failure load, no significant difference was found between the DR (370N, 480N) and SB (399N, 493N) groups, but both groups achieved superior results compared with the TS group (249N, 340N) (p<0.05). The results suggested that the suture anchor constructs would be stronger than the fixation construct using screws for the humeral GT fracture.

Original languageEnglish
JournalJournal of Orthopaedic Research
DOIs
Publication statusAccepted/In press - 1800

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Inorganic Chemistry
  • Cell Biology
  • Periodontics
  • Oral Surgery
  • History
  • Philosophy
  • Orthopedics and Sports Medicine

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