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

28 Citations (Scopus)

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 (321 N), DR (263 N), and TS (187 N) groups (SB > DR > TS, p < 0.05) in the mean force of cyclic loading to create 3 mm displacement. Regarding the mean force of cyclic loading to create 5 mm displacement and ultimate failure load, no significant difference was found between the DR (370 N, 480 N) and SB (399 N, 493 N) groups, but both groups achieved superior results compared with the TS group (249 N, 340 N) (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
Pages (from-to)423-428
Number of pages6
JournalJournal of orthopaedic research : official publication of the Orthopaedic Research Society
Volume30
Issue number3
DOIs
Publication statusPublished - 2012 Mar

All Science Journal Classification (ASJC) codes

  • Orthopedics and Sports Medicine

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