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. 2023 Dec;48(11):1201-1206.
doi: 10.1177/17531934231186495. Epub 2023 Jul 27.

Biomechanical analysis of three techniques of suspensionplasty after trapeziectomy: a cadaveric study

Hayman Lui  1   2 , John G Galbraith  2   3 , Kathleen Meyers  4 , Randy Bindra  1   4   5 , Steve K Lee  3
Affiliations

Biomechanical analysis of three techniques of suspensionplasty after trapeziectomy: a cadaveric study

Hayman Lui et al. J Hand Surg Eur Vol. 2023 Dec.

Abstract

The aim of the present cadaveric study was to assess resistance to first metacarpal subsidence of three techniques of suspensionplasty after trapeziectomy. In total, 18 forearms (mean age 60 years [range 20-89]) were used with six specimens per surgical technique: palmar oblique ligament reconstruction with tendon interposition (LRTI), abductor pollicis longus (APL) suspensionplasty, or suture suspensionplasty. There was no significant difference in mean trapezial space height after trapeziectomy and suspensionplasty compared to the preoperative trapezial height. However, after simulation of physiological lateral pinch, there was a significant (p < 0.05) difference in mean trapezial space height between the APL suspensionplasty and the suture suspensionplasty compared to the LRTI group. After axial loading, there was significantly greater metacarpal subsidence in the LRTI group compared to the APL and suture suspensionplasty groups but no statistically significant difference between the suture suspensionplasty and the APL suspensionplasty groups.Level of evidence: V.

Keywords: Carpometacarpal osteoarthritis; biomechanical testing; carpometacarpal reconstruction; suspensionplasty; trapeziectomy.

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Conflict of interest statement

Declaration of conflicting interestsThe authors declare no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

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