Three-dimensional shoulder kinematics normalize after rotator cuff repair

Journal of Shoulder and Elbow Surgery
Arjen KolkJurriaan H de Groot

Abstract

Patients with a rotator cuff (RC) tear often exhibit scapular dyskinesia with increased scapular lateral rotation and decreased glenohumeral elevation with arm abduction. We hypothesized that in patients with an RC tear, scapular lateral rotation, and thus glenohumeral elevation, will be restored to normal after RC repair. Shoulder kinematics were quantitatively analyzed in 26 patients with an electromagnetic tracking device (Flock of Birds) before and 1 year after RC repair in this observational case series. We focused on humeral range of motion and scapular kinematics during abduction. The asymptomatic contralateral shoulder was used as the control. Changes in scapular kinematics were associated with the gain in range of motion. Shoulder kinematics were analyzed using a linear mixed model. Mean arm abduction and forward flexion improved after surgery by 20° (95% confidence interval [CI], 2.7°-36.5°; P = .025) and 13° (95% CI, 1.2°-36.5°; P = .044), respectively. Kinematic analyses showed decreases in mean scapular protraction (ie, internal rotation) and lateral rotation (ie, upward rotation) during abduction by 3° (95% CI, 0.0°-5.2°; P = .046) and 4° (95% CI, 1.6°-8.4°; P = .042), respectively. Glenohumeral elevation increase...Continue Reading

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Citations

Oct 19, 2016·PM & R : the Journal of Injury, Function, and Rehabilitation·Jessica M FritzGerald F Harris
Nov 18, 2016·The Journal of Bone and Joint Surgery. American Volume·Nitin B JainKristin R Archer
Jan 13, 2018·Journal of Orthopaedic Surgery and Research·Naoya KozonoYasuharu Nakashima
Dec 8, 2019·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Olimpio GalassoRoberto Castricini
Jul 22, 2019·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Alyssa J SchnorenbergBrooke A Slavens
Apr 10, 2021·Clinical Orthopaedics and Related Research·Nicole G LemasterTim L Uhl
Feb 5, 2021·Journal of Shoulder and Elbow Surgery·Anthony M BarciaJohn M Tokish

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