Kinematic analysis of dynamic shoulder motion in patients with reverse total shoulder arthroplasty

Kwon, Young W.; Pinto, Vivek J.; Yoon, Jangwhon; Frankle, Mark A.; Dunning, Page; Sheikhzadeh, Ali

doi:10.1016/j.jse.2011.07.031

Cited by 68 publications

(67 citation statements)

References 29 publications

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“…Overall, the scapula was more upwardly rotated in the reverse shoulder group, and the scapulohumeral rhythm ratio was smaller, as also observed by De Toledo et al (2012), Kontaxis and Johnson (2008), and Kwon et al (2012). It is worth highlighting, though, that changes in scapular motion and position are expected in a wide variety of shoulder injuries (Ludewig and Reynolds, 2009;Scibek et al, 2009), and thus it is unclear whether the kinematic changes in the reverse shoulder group are a result of the prosthesis or of the prior adaptation to the pathology.…”

Section: Discussionsupporting

confidence: 80%

“…The reverse shoulder prosthesis, which is introduced as an alternative solution to pathologies in which the rotator cuff is torn or nonfunctioning, changes considerably the shoulder joint physiology and its biomechanics. This design uses a modified mechanical joint to reverse the relationship between the scapular and humeral components, i.e., the ''ball'' component is placed on the glenoid, whereas the ''socket'' component is fixed to the proximal humerus (Bergmann et al, 2008;Kwon et al, 2012). Clearly, it is essential to understand the biomechanical changes introduced by the reverse design in order to achieve the best possible outcome (SanchezSotelo, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Computational reverse shoulder prosthesis model: Experimental data and verification

Martins

Quental

Folgado

et al. 2015

Journal of Biomechanics

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Section: Discussionsupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Computational reverse shoulder prosthesis model: Experimental data and verification

Martins

Quental

Folgado

et al. 2015

Journal of Biomechanics

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“…This traditionally accepted ratio was chosen because there continues to be disagreement regarding if and/or how RTSA alters scapular rotation. One study showed that patients who had RTSA exhibited greater scapular rotation [23], whereas another showed little change or even a decrease in rotation [25]. Muscle and other soft tissues were hydrated regularly using normal saline throughout the testing protocol.…”

Section: Experimental Protocolmentioning

confidence: 99%

Implant Design Variations in Reverse Total Shoulder Arthroplasty Influence the Required Deltoid Force and Resultant Joint Load

Giles

Langohr

Johnson

et al. 2015

Clinical Orthopaedics &Amp; Related Research

144

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Background Reverse total shoulder arthroplasty (RTSA) is widely used; however, the effects of RTSA geometric parameters on joint and muscle loading, which strongly influence implant survivorship and long-term function, are not well understood. By investigating these parameters, it should be possible to objectively optimize RTSA design and implantation technique. Questions/purposes The purposes of this study were to evaluate the effect of RTSA implant design parameters on (1) the deltoid muscle forces required to produce abduction, and (2) the magnitude of joint load and (3) the loading angle throughout this motion. We also sought to determine how these parameters interacted.Methods Seven cadaveric shoulders were tested using a muscle load-driven in vitro simulator to achieve repeatable motions. The effects of three implant parameters-humeral lateralization (0, 5, 10 mm), polyethylene thickness (3, 6, 9 mm), and glenosphere lateralization (0, 5, 10 mm)-were assessed for the three outcomes: deltoid muscle force required to produce abduction, magnitude of joint load, and joint loading angle throughout abduction. Results Increasing humeral lateralization decreased deltoid forces required for active abduction (0 mm: 68% ± 8% [95% CI, 60%-76% body weight (BW)]; 10 mm: 65% ± 8% [95% CI, 58%-72 % BW]; p = 0.022). Increasing glenosphere lateralization increased deltoid force (0 mm: 61% ± 8% [95% CI, 55%-68% BW]; 10 mm: 70% ± 11% [95% CI, 60%-81% BW]; p = 0.007) and joint loads (0 mm: 53% ± 8% [95% CI, 46%-61% BW]; 10 mm: 70% ± 10% [95% CI, 61%-79% BW]; p \ 0.001). Increasing polyethylene cup thickness increased deltoid force (3 mm: 65% ± 8% [95% CI, 56%-73% BW]; 9 mm: 68% ± 8% [95% CI, 61%-75% BW]; p = 0.03) and joint load (3 mm: 60% ± 8% [95% CI, 53%-67% BW]; 9 mm: 64% ± 10% [95% CI, 56%-72% BW

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“…These studies provided important information on complex shoulder motion in patients undergoing shoulder arthroplasty. However, all investigations evaluated only patients with TSA (Coley et al, 2007;Lin et al, 2006;Veeger et al, 2006) or RSA (Alta et al, 2011;Bergmann et al, 2008;Kontaxis and Johnson, 2008;Kwon et al, 2012), except for one study that assessed 17 patients who had TSA and 8 with RSA (de Toledo et al, 2012). Furthermore, most studies were mainly aimed at analyzing the role of the Contents lists available at ScienceDirect journal homepage: www.elsevier.com/locate/jbiomech www.JBiomech.com scapulothoracic, or sternoclavicular joint during the glenohumeral movements.…”

Section: Introductionmentioning

confidence: 99%

“…the ball is placed on the scapula and the socket on the proximal humerus. This inverted design considerably changes not only the anatomy, but also the biomechanics of the shoulder joint and the upper extremity motion patterns (de Toledo et al, 2012;Kwon et al, 2012). Nevertheless, the range of active shoulder movements, which is the main prerequisite for adequate reaching motion, is generally similar in patients with TSA or RSA, except for external rotation that is mostly better after TSA (Castricini et al, 2013;Kiet et al, 2015;Latif et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Kinematic analysis of reaching movements of the upper limb after total or reverse shoulder arthroplasty

Postacchini

Paoloni

Carbone

et al. 2015

Journal of Biomechanics

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Studies have analyzed three-dimensional complex motion of the shoulder in healthy subjects or patients undergoing total shoulder arthroplasty (TSA) or reverse shoulder arthroplasty (RSA). No study to date has assessed the reaching movements in patients with TSA or RSA. Twelve patients with TSA (Group A) and 12 with RSA (Group B) underwent kinematic analysis of reaching movements directed at four targets. The results were compared to those of 12 healthy subjects (Group C). The assessed parameters were hand-to-target distance, target-approaching velocity, humeral-elevation angular velocity, normalized jerk (indicating motion fluidity), elbow extension and humeral elevation angles. Mean Constant score increased by 38 points in Group A and 47 in Group B after surgery. In three of the tasks, there were no significant differences between healthy subjects and patients in the study groups. Mean target-approaching velocity and humeral-elevation angular velocity were significantly greater in the control group than in study groups and, overall, greater in Group A than Group B. Movement fluidity was significantly greater in the controls, with patients in Group B showing greater fluidity than those in Group A. Reaching movements in the study groups were comparable, in three of the tasks, to those in the control group. However, the latter performed significantly better with regard to target-approaching velocity, humeral-elevation angular velocity and movement fluidity, which are the most representative characteristics of reaching motion. These differences, that may be related to deterioration of shoulder proprioception after prosthetic implant, might possibly be decreased with appropriate rehabilitation.

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Kinematic analysis of dynamic shoulder motion in patients with reverse total shoulder arthroplasty

Cited by 68 publications

References 29 publications

Computational reverse shoulder prosthesis model: Experimental data and verification

Computational reverse shoulder prosthesis model: Experimental data and verification

Implant Design Variations in Reverse Total Shoulder Arthroplasty Influence the Required Deltoid Force and Resultant Joint Load

Kinematic analysis of reaching movements of the upper limb after total or reverse shoulder arthroplasty

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