Implant characteristics affect in vivo shoulder kinematics during multiplanar functional motions after reverse shoulder arthroplasty

The purpose of this study was to determine how implant characteristics affect in vivo shoulder kinematics after reverse shoulder arthroplasty (RSA). Kinematics of the affected upper limb were measured in 32 participants during five motions (scapular plane abduction, hand-to-head, hand-to-back, inter...

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Bibliographic Details
Published in:Journal of biomechanics 2022-04, Vol.135, p.111050-111050, Article 111050
Main Authors: Como, Christopher, LeVasseur, Clarissa, Kane, Gillian, Rai, Ajinkya, Munsch, Maria, Gabrielli, Alexandra, Hughes, Jonathan, Anderst, William, Lin, Albert
Format: Article
Language:English
Subjects:
Arthritis
Arthroplasty
Arthroplasty, Replacement, Shoulder
Biomechanical Phenomena
Biomechanics
Cadavers
Eccentricity
Humans
Humerus
In vivo methods and tests
Joint surgery
Kinematics
Motion capture
Neck
Prosthesis Design
Range of Motion, Articular
Reverse shoulder arthroplasty
Rotation
Rotator cuff
RSA
Shoulder
Shoulder Joint - surgery
Shoulder kinematics
Surgical techniques
Transplants & implants
Upper Extremity
Waveforms
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Summary:The purpose of this study was to determine how implant characteristics affect in vivo shoulder kinematics after reverse shoulder arthroplasty (RSA). Kinematics of the affected upper limb were measured in 32 participants during five motions (scapular plane abduction, hand-to-head, hand-to-back, internal/external rotation at 90° abduction, and circumduction) using optical motion capture. Shoulder abduction, plane of elevation, and internal/external rotation range of motion (ROM), peak angles, and continuous kinematics waveforms were calculated for each motion. Multiple regression was used to identify associations between kinematics and implant characteristics of lateralization, humeral retroversion, glenosphere size, glenosphere tilt, glenoid eccentricity, and implant neck-shaft angle (135° or 145°). Less humeral retroversion was associated with greater shoulder rotation ROM (p = 0.036) and greater plane of elevation ROM (p = 0.024) during circumduction, while less eccentricity was associated with more posterior plane of elevation during hand-to-back (p = 0.021). The 145° implant was associated with greater internal/external shoulder rotation ROM (p 
ISSN:0021-9290
1873-2380
DOI:10.1016/j.jbiomech.2022.111050