A biomechanical study on the effect of long head of biceps tenotomy on supraspinatus load and humeral head position during shoulder abduction

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dc.contributor.author Shavana, Govender
dc.contributor.author Cronje, Jessica Y.
dc.contributor.author Mcduling, Chris
dc.contributor.author Verbeek, Reinder B.
dc.contributor.author Nkwenika, Tshifhiwa
dc.contributor.author Hohmann, Erik
dc.contributor.author Keough, Natalie
dc.date.accessioned 2023-08-22T05:29:13Z
dc.date.available 2023-08-22T05:29:13Z
dc.date.issued 2022-06
dc.description.abstract INTRODUCTION : The purpose of this study was to determine the effect of biceps tendon tenotomy on the load of the supraspinatus tendon/muscle complex during abduction of the arm from 0° to 15°. METHODS : Eleven fresh frozen human cadaver shoulders (6 males, 5 females, age ranged 44-88 years, mean upper extremity weight 2.96 ± 0.56 kg) were included. The specimens were sequentially mounted onto a custom-made fixture attached to a pulley system and load cell. The pulley system was used to pull the supraspinatus tendon/muscle complex along its fiber directions to abduct the arm to 15°. Abduction angles were recorded with a digital inclinometer. Two conditions were tested: (1) long head biceps tendon (LHBT) intact and in normal anatomical position; (2) LHBT cut within the bicipital groove. Qualitative visual inspection of humeral head displacement during abduction was also included. Descriptive statistics were calculated. The Shapiro-Wilk test was used to establish normal data distribution, and the paired t-test was used to compare the 2 conditions. RESULTS : For the intact condition (LHBT intact), the mean load was 45.71 ± 21.04 N. For the biceps tenotomy test, the load measured 41.37 ± 23.43 N. These differences were not significant (P = .1480). In the tenotomy condition, the humeral head initially displaced inferior, and with initiation of abduction, the humeral head translated superior to its normal position. CONCLUSION : The results suggest that the LHBT has no critical role with initial abduction of the arm. Furthermore, the LHBT does not appear to increase loads required for the supraspinatus muscle/tendon complex to perform the same action of abduction. en_US
dc.description.department Anatomy en_US
dc.description.librarian hj2023 en_US
dc.description.sponsorship The National Research Foundation. en_US
dc.description.uri http://www.elsevier.com/locate/ymse en_US
dc.identifier.citation Shavana, G., Cronjé, J.Y., Mcduling, C. et al. 2022, 'A biomechanical study on the effect of long head of biceps tenotomy on supraspinatus load and humeral head position during shoulder abduction', Journal of Shoulder and Elbow Surgery, vol. 31, no. 6, pp. 1294-1299, doi : 10.1016/j.jse.2021.12.014. en_US
dc.identifier.issn 1058-2746 (print)
dc.identifier.issn 1532-6500 (online)
dc.identifier.other 10.1016/j.jse.2021.12.014
dc.identifier.uri http://hdl.handle.net/2263/92009
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.rights © 2022 Journal of Shoulder and Elbow Surgery Board of Trustees. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Journal of Shoulder and Elbow Surgery. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Journal of Shoulder and Elbow Surgery, vol. 31, no. 6, pp. 1294-1299, 2022, doi : 10.1016/j.jse.2021.12.014. en_US
dc.subject Biceps pulley en_US
dc.subject Tenotomy en_US
dc.subject Tenodesis en_US
dc.subject Glenohumeral joint en_US
dc.subject Supraspinatus tendon load en_US
dc.subject Shoulder abduction en_US
dc.subject Basic science study en_US
dc.subject Biomechanics en_US
dc.subject Long head biceps tendon (LHBT) en_US
dc.subject.other Health sciences articles SDG-03
dc.subject.other SDG-03: Good health and well-being
dc.title A biomechanical study on the effect of long head of biceps tenotomy on supraspinatus load and humeral head position during shoulder abduction en_US
dc.type Postprint Article en_US


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