Anatomic Acromioclavicular Joint Reconstruction With and Without Acromioclavicular Ligament Reconstruction: A Comparative Biomechanical Study

Document Type

Article

Publication Date

4-2023

Publication Title

Shoulder & Elbow

Abstract

BACKGROUND: The purpose of this study was to determine if adding a reconstructed superior acromioclavicular (AC) joint ligament adds significant biomechanical stability to the AC joint over anatomic coracoclavicular (CC) ligament reconstruction alone.

METHODS: Fourteen cadaver shoulders were used for the comparison of biomechanical stability among the anatomic CC ligament reconstruction alone, CC and AC ligament reconstruction, and the intact groups by measuring the displacement under cyclic loads. A load to failure test was then performed in the vertical direction at a loading rate of 2 mm /sec to determine surgical-repair joints' tolerance to the maximum failure load.

RESULTS: The average peak-to-peak displacement induced by cyclic load in the sagittal axis and vertical axis direction was not significantly different between CC ligament reconstruction, CC and AC ligament reconstruction, and intact groups. The maximum failure load for the CC reconstruction (224.9 ± 91.8 N (Mean ± SEM)) was lower than CC/AC reconstruction groups (326.2 ± 123.3 N). The CC/AC reconstruction group failed at a significantly higher load (t test,

CONCLUSION: CC/AC reconstruction surgical technique yielded a better shoulder stability than CC ligament alone reconstruction that may better maintain reduction of the AC joint.

Volume

15

Issue

2

First Page

166

Last Page

172

DOI

10.1177/17585732211068322

ISSN

1758-5732

PubMed ID

37035618

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