Biomechanical Analysis of Three Different Reconstruction Techniques for Scapholunate Instability: A Cadaveric Study

Seungbum Chae, Junho Nam, Il Jung Park, Steve S. Shin, Michelle H. McGarry, Thay Q. Lee

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Background: This study aimed to compare the biomechanical strength of 360° scapholunate interosseous ligament (SLIL) reconstruction only using an artificial material (AM), double dorsal limb (DDL) SLIL reconstruction only using AM, and the modified Brunelli technique (MBT) with ligament. Methods: Eight cadaver wrists were used for this study. The SL interval, SL angle, and radiolunate (RL) angle were recorded with MicroScribe. The SL distance was measured after dividing the volar and dorsal aspects. We utilized four different wrist postures (neutral, flexion, extension, and clenched fist) to compare five conditions: intact wrist, SLIL resection, 360° SLIL reconstruction using AM, DDL SLIL reconstruction using AM, and MBT SLIL reconstruction with ligament. Results: The dorsal SL distance in the SLIL resection was widened in all wrist positions. The dorsal SL distance was restored with all three techniques and in all wrist positions. The volar SL distance in the wrist extension position was widened in the SLIL resection condition. The volar SL distance was restored in the extension position after 360° SLIL reconstruction using AM condition. There were no statistically significant differences in SL and RL angles among the conditions. Conclusions: All three reconstruction techniques could restore the dorsal SL distance. However, only the 360° SLIL reconstruction using AM restored the volar SL distance in the wrist extension position. DDL SLIL reconstruction using AM tended to overcorrect, whereas 360° SLIL reconstruction using AM effectively stopped volar SL interval widening.

Original languageEnglish
Pages (from-to)613-621
Number of pages9
JournalClinics in Orthopedic Surgery
Volume14
Issue number4
DOIs
StatePublished - Dec 2022

Bibliographical note

Funding Information:
This study was supported by the Arthrex and Orthopedic Biomechanics Laboratory of the Congress Medical Foundation. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (Ministry of Science and ICT) (No. 2020R1G1A110118511).

Publisher Copyright:
© 2022 by The Korean Orthopaedic Association.

Keywords

  • Ligaments
  • Scapholunate reconstruction
  • Wrist

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