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Knee Surgery, Sports Traumatology, Arthroscopy
Published in: Knee Surgery, Sports Traumatology, Arthroscopy 5/2015

01-05-2015 | Shoulder

Correlation of clinical symptoms and function with fatty degeneration of infraspinatus in rotator cuff tear

Authors: Joong-Bae Seo, Jae-Sung Yoo, Ho-Seong Jang, Jung-Sang Kim

Published in: Knee Surgery, Sports Traumatology, Arthroscopy | Issue 5/2015

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Abstract

Purpose

The aim of this study was to analyse the correlation of clinical symptoms and function with the fatty degeneration of the infraspinatus in rotator cuff tears.

Methods

A total of 152 patients who had rotator cuff tears was enroled retrospectively. The infraspinatus muscle was divided into two compartments according to the bundle of fibres, and the patients were divided into four groups that reflected fatty degeneration. The muscle strength of the shoulder and clinical symptoms was investigated.

Results

The severity of the rotator cuff tear and retraction increased with fatty degeneration of both the superior and inferior parts in the infraspinatus muscles. Because of the increasing fatty degeneration of the superior part of the infraspinatus, the shoulder strength index (SSI) of abduction had poor results. Additionally, as the fatty degeneration of the inferior part of the infraspinatus increased, the SSI of abduction and external rotation had worse results.

Conclusions

Fatty degeneration of the superior part of the infraspinatus has no correlation with the power of external rotation but has a negative correlation with the power of abduction. Moreover, fatty degeneration of the inferior part of the infraspinatus has a negative correlation with both the power of abduction and external rotation.

Level of evidence

Retrospective study, Level IV.
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Metadata
Title
Correlation of clinical symptoms and function with fatty degeneration of infraspinatus in rotator cuff tear
Authors
Joong-Bae Seo
Jae-Sung Yoo
Ho-Seong Jang
Jung-Sang Kim
Publication date
01-05-2015
Publisher
Springer Berlin Heidelberg
Published in
Knee Surgery, Sports Traumatology, Arthroscopy / Issue 5/2015
Print ISSN: 0942-2056
Electronic ISSN: 1433-7347
DOI
https://doi.org/10.1007/s00167-014-2857-0

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