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MUSCULOSKELETAL SURGERY
Published in: MUSCULOSKELETAL SURGERY 2/2016

01-08-2016 | Original Article

The effect of deltoid lengthening on functional outcome for reverse shoulder arthroplasty

Authors: V. J. Sabesan, D. Lombardo, D. Josserand, D. Buzas, T. Jelsema, G. R. Petersen-Fitts, J. M. Wiater

Published in: MUSCULOSKELETAL SURGERY | Issue 2/2016

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Abstract

Purpose

Reverse shoulder arthroplasty (RSA) is based on the biomechanical advantages of lengthening the deltoid while medializing its center of rotation (COR). Little evidence exists describing the clinical benefits of these biomechanical advantages. The purpose of this study is to assess the relationship between deltoid lengthening and medialization of the COR with functional outcomes for RSA patients.

Methods

We retrospectively reviewed patients treated with primary RSA. Radiographic measurements of deltoid length and COR, assessment of forward elevation (FE) and external rotation (ER), and functional outcome scores were obtained pre- and postoperatively. Linear regression analyses were performed to assess the relationship between these radiographic measurements and changes in shoulder functionality.

Results

On average, patients improved significantly in function and functional outcome scores. Postoperative COR correlated weakly with postoperative FE. There were weakly negative correlations between increase in acromion to greater tuberosity distance and postoperative FE, and between deltoid lengthening and FE improvement.

Conclusions

Our results suggest that deltoid lengthening does not correlate with improvements in active FE or ER. These findings could indicate that change in deltoid length is less important than previously thought. Furthermore, the negative correlations seen could indicate that there is over-tensioning of the deltoid in specific cases. Further studies are needed to better assess the role of deltoid length and other factors that may impact RSA outcomes.
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Metadata
Title
The effect of deltoid lengthening on functional outcome for reverse shoulder arthroplasty
Authors
V. J. Sabesan
D. Lombardo
D. Josserand
D. Buzas
T. Jelsema
G. R. Petersen-Fitts
J. M. Wiater
Publication date
01-08-2016
Publisher
Springer Milan
Published in
MUSCULOSKELETAL SURGERY / Issue 2/2016
Print ISSN: 2035-5106
Electronic ISSN: 2035-5114
DOI
https://doi.org/10.1007/s12306-016-0400-9

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