Biomechanical comparison of three fixation techniques used for four-corner arthrodesis

J. Kraisarin, D. G. Dennison, L. J. Berglund, K. N. An, A. Y. Shin

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

Clinical results following four-corner arthrodesis vary and suggest that nonunion may be related to certain fixation techniques. The purpose of our study was to examine the displacement between the lunate and capitate following a simulated four-corner arthrodesis with the hypothesis that three types of fixation (Kirschner wires, dorsal circular plate, and a locked dorsal circular plate) would allow different amounts of displacement during simulated wrist flexion and extension. Cadaver wrists with simulated four-corner arthrodeses were loaded cyclically either to implant failure or until the lunocapitate displacement exceeded 1 mm. The locked dorsal circular plate group was significantly more stable than the dorsal circular plate and K-wire groups (p = 0.018 and p = 0.006). While these locked dorsal circular plates appear to be very stable our results are limited only to the biomechanical behavior of these fixation techniques within a cadaver model.

Original languageEnglish (US)
Pages (from-to)560-567
Number of pages8
JournalJournal of Hand Surgery: European Volume
Volume36
Issue number7
DOIs
StatePublished - Sep 1 2011

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Keywords

  • Biomechanical
  • four-corner
  • fusion
  • wrist

ASJC Scopus subject areas

  • Surgery

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