Histomorphology of the Subregions of the Scapholunate Interosseous Ligament and Its Enthesis.

Autor: Liew MY; Department Plastic Surgery, Hooper Hand Unit, St John's Hospital, Livingston, United Kingdom.; Department of Anatomy, Edinburgh Medical School: Biomedical Sciences, University of Edinburgh, Scotland, United Kingdom., Mortimer JW; Department of Anatomy, Edinburgh Medical School: Biomedical Sciences, University of Edinburgh, Scotland, United Kingdom., Paxton JZ; Department of Anatomy, Edinburgh Medical School: Biomedical Sciences, University of Edinburgh, Scotland, United Kingdom., Tham S; Department of Plastic and Hand Surgery, St Vincent's Hospital, Hand and Wrist Biomechanics Laboratory/O'Brien Institute, Melbourne, Australia., Rust PA; Department Plastic Surgery, Hooper Hand Unit, St John's Hospital, Livingston, United Kingdom.; Department of Anatomy, Edinburgh Medical School: Biomedical Sciences, University of Edinburgh, Scotland, United Kingdom.
Jazyk: angličtina
Zdroj: Journal of wrist surgery [J Wrist Surg] 2021 Feb 16; Vol. 10 (6), pp. 467-475. Date of Electronic Publication: 2021 Feb 16 (Print Publication: 2021).
DOI: 10.1055/s-0041-1723792
Abstrakt: Background  The scapholunate interosseous ligament (SLIL) has three subregions: dorsal, proximal, and volar. The SLIL enthesis has not previously been studied despite its important mechanical function in wrist joint biomechanics. Questions/Purposes  This study aims to compare the histomorphological differences between the SLIL subregions, including at their entheses. Three questions are explored: Do the gross dimensions differ between SLIL subregions? Does the enthesis qualitatively, and its calcified fibrocartilage (CF) quantitatively, differ between (a) SLIL subregions and (b) scaphoid and lunate attachments? Methods  Twelve fresh-frozen human cadaveric wrists were dissected and the gross dimensions of the SLIL subregions measured. Subregions were histologically processed for morphological and compositional analyses, including quantification of enthesis CF area. Results  The dorsal subregion was the thickest. The dorsal and volar subregions had fibrocartilaginous entheses, while the proximal subregion was attached to articular cartilage. The dorsal subregion had significantly more CF than the volar subregion. There was no significant difference in the enthesis CF between scaphoid and lunate attachments in the three subregions. Conclusions  There are significant morphological differences between the SLIL subregions. The dorsal subregion has the largest amount of CF, which is consistent with the greater biomechanical force subjected to this subregion. The similar histomorphology of the ligament at the scaphoid and lunate entheses suggests that similar biomechanical forces are applied to both attachments. Clinical Relevance  The histomorphological results confirm that the dorsal subregion is the strongest of the three subregions. The results from the entheseal region may have important implications in the study of graft incorporation during SLIL reconstruction.
Competing Interests: Conflict of Interest P.A.R. reports grants from Mr Hamilton's Research and Development Fund, St John's Hospital, Edinburgh, grants from Hand and Wrist Medical Research Foundation, a charitable body registered in Melbourne, Australia, during the conduct of the study. M.Y.L. reports grants from Hand and Wrist Medical Research Foundation, a charitable body registered in Melbourne, Australia, grants from Mr Hamilton's Research and Development Fund, St John's Hospital, Edinburgh, during the conduct of the study. J.W.M. reports grants from Hand and Wrist Medical Research Foundation, a charitable body registered in Melbourne, Australia, grants from Mr Hamilton's Research and Development Fund, St John's Hospital, Edinburgh, during the conduct of the study. J.Z.P. reports grants from 'Hand and Wrist Medical Research Foundation, a charitable body registered in Melbourne, Australia, grants from Mr Hamilton's Research and Development Fund, St John's Hospital, Edinburgh, during the conduct of the study.
(Thieme. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: