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Glenohumeral joint motion after subscapularis tendon repair: an analysis of cadaver shoulder models

BACKGROUND: As for the surgical treatment of the rotator cuff tears, the subscapularis tendon tears have recently received much attention for the mini-open or arthroscopic repair. The results of surgical repair for the subscapularis tendon tear are satisfactory, but the range of external rotation is...

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Autores principales: Sano, Teiichi, Aoki, Mitsuhiro, Tanaka, Yoshitaka, Izumi, Tomoki, Fujimiya, Mineko, Yamashita, Toshihiko
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4035761/
https://www.ncbi.nlm.nih.gov/pubmed/24885276
http://dx.doi.org/10.1186/1749-799X-9-41
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author Sano, Teiichi
Aoki, Mitsuhiro
Tanaka, Yoshitaka
Izumi, Tomoki
Fujimiya, Mineko
Yamashita, Toshihiko
author_facet Sano, Teiichi
Aoki, Mitsuhiro
Tanaka, Yoshitaka
Izumi, Tomoki
Fujimiya, Mineko
Yamashita, Toshihiko
author_sort Sano, Teiichi
collection PubMed
description BACKGROUND: As for the surgical treatment of the rotator cuff tears, the subscapularis tendon tears have recently received much attention for the mini-open or arthroscopic repair. The results of surgical repair for the subscapularis tendon tear are satisfactory, but the range of external rotation is reported to be restricted after the repair. The purpose of this study was to evaluate the range of glenohumeral joint motion after repairs of various sizes of subscapularis tendon tears. METHODS: Using eight fresh frozen human cadaveric shoulders (mean age at death, 81.5 years), three sizes of subscapularis tendon tear (small, medium, and large) were made and then repaired. With the scapula fixed to the wooden jig, the end-range of glenohumeral motion was measured with passive movement applied through 1.0-Nm torque in the directions of scapular elevation, flexion, abduction, extension, horizontal abduction, and horizontal adduction. The passive end-ranges of external and internal rotation in various positions with rotational torque of 1.0 Nm were also measured. Differences in the ranges among the three type tears were analyzed. RESULTS: As tear size increased, range of glenohumeral motion in horizontal abduction after repair decreased gradually and was significantly decreased with the large size tear (P < 0.01). The end-range of external rotation decreased progressively with increasing tear size in every glenohumeral position. The prominent decrease in external rotation (around 40° reduction from intact shoulders) was observed in shoulders after repair of large size tear at 30° to 60° of scapular elevation and abduction. CONCLUSIONS: As the size of the subscapularis tendon tear increased, the passive ranges of horizontal abduction and external rotation of the glenohumeral joint after repair decreased significantly. In shoulders with a subscapularis tendon tear, it is necessary to consider the reduction of external rotation depending on tear size.
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spelling pubmed-40357612014-05-29 Glenohumeral joint motion after subscapularis tendon repair: an analysis of cadaver shoulder models Sano, Teiichi Aoki, Mitsuhiro Tanaka, Yoshitaka Izumi, Tomoki Fujimiya, Mineko Yamashita, Toshihiko J Orthop Surg Res Research Article BACKGROUND: As for the surgical treatment of the rotator cuff tears, the subscapularis tendon tears have recently received much attention for the mini-open or arthroscopic repair. The results of surgical repair for the subscapularis tendon tear are satisfactory, but the range of external rotation is reported to be restricted after the repair. The purpose of this study was to evaluate the range of glenohumeral joint motion after repairs of various sizes of subscapularis tendon tears. METHODS: Using eight fresh frozen human cadaveric shoulders (mean age at death, 81.5 years), three sizes of subscapularis tendon tear (small, medium, and large) were made and then repaired. With the scapula fixed to the wooden jig, the end-range of glenohumeral motion was measured with passive movement applied through 1.0-Nm torque in the directions of scapular elevation, flexion, abduction, extension, horizontal abduction, and horizontal adduction. The passive end-ranges of external and internal rotation in various positions with rotational torque of 1.0 Nm were also measured. Differences in the ranges among the three type tears were analyzed. RESULTS: As tear size increased, range of glenohumeral motion in horizontal abduction after repair decreased gradually and was significantly decreased with the large size tear (P < 0.01). The end-range of external rotation decreased progressively with increasing tear size in every glenohumeral position. The prominent decrease in external rotation (around 40° reduction from intact shoulders) was observed in shoulders after repair of large size tear at 30° to 60° of scapular elevation and abduction. CONCLUSIONS: As the size of the subscapularis tendon tear increased, the passive ranges of horizontal abduction and external rotation of the glenohumeral joint after repair decreased significantly. In shoulders with a subscapularis tendon tear, it is necessary to consider the reduction of external rotation depending on tear size. BioMed Central 2014-05-23 /pmc/articles/PMC4035761/ /pubmed/24885276 http://dx.doi.org/10.1186/1749-799X-9-41 Text en Copyright © 2014 Sano et al.; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research Article
Sano, Teiichi
Aoki, Mitsuhiro
Tanaka, Yoshitaka
Izumi, Tomoki
Fujimiya, Mineko
Yamashita, Toshihiko
Glenohumeral joint motion after subscapularis tendon repair: an analysis of cadaver shoulder models
title Glenohumeral joint motion after subscapularis tendon repair: an analysis of cadaver shoulder models
title_full Glenohumeral joint motion after subscapularis tendon repair: an analysis of cadaver shoulder models
title_fullStr Glenohumeral joint motion after subscapularis tendon repair: an analysis of cadaver shoulder models
title_full_unstemmed Glenohumeral joint motion after subscapularis tendon repair: an analysis of cadaver shoulder models
title_short Glenohumeral joint motion after subscapularis tendon repair: an analysis of cadaver shoulder models
title_sort glenohumeral joint motion after subscapularis tendon repair: an analysis of cadaver shoulder models
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4035761/
https://www.ncbi.nlm.nih.gov/pubmed/24885276
http://dx.doi.org/10.1186/1749-799X-9-41
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