scholarly journals Extra-Short Humeral Heads Reduce Glenohumeral Joint Overstuffing Compared to Short Heads in Anatomic Total Shoulder Arthroplasty

2021 ◽  
Author(s):  
Joseph G. Monir ◽  
Kevin A. Hao ◽  
Dilhan Abeyewardene ◽  
Kevin J. O’Keefe ◽  
Joseph J. King ◽  
...  
Keyword(s):  
Shoulder Arthroplasty ◽  
Glenohumeral Joint ◽  
Total Shoulder Arthroplasty

Quantitative Assessment of Glenohumeral Joint Forces in Positions of Overhead Activities: Effects of Shoulder Arthroplasty

2002 ◽  
Author(s):  
Thay Q. Lee ◽  
Mark Schamblin ◽  
Bruce Y. Yang ◽  
Michelle H. McGarry ◽  
Ranjan Gupta
Keyword(s):  
Shoulder Arthroplasty ◽  
Glenohumeral Joint ◽  
Total Shoulder Arthroplasty ◽  
Glenoid Component ◽  
Shoulder Hemiarthroplasty ◽  
Adequate Pain Relief ◽  
Joint Forces ◽  
Before And After ◽  
Total Knee ◽  
Component Loosening

Glenohumeral arthroplasty as well as hemiarthroplasty, although providing adequate pain relief, has not shared in the success of similar joint replacement procedures such as total knee arthroplasty or total hip arthroplasty. Short comings of this procedure include a decreased range of motion postoperatively as well as increased incidents of glenoid component loosening in total shoulder procedures. This is especially a problem in the end ranges of motion where eccentric loading of the glenoid component are thought to occur. The purpose of this study was to quantify the glenohumeral joint forces before and after bipolar shoulder hemiarthroplasty and total shoulder arthroplasty for positions simulating overhead activities and commonly relied upon by the wheelchair dependent individual.

Biomechanical Analysis of Normal, Injured and Implanted Shoulder Joint

2014 ◽  
Vol 1030-1032 ◽  
pp. 2309-2312
Author(s):  
Aydin Azizi ◽  
Ali Ashkzari
Keyword(s):  
Rotator Cuff ◽  
Range Of Motion ◽  
Shoulder Arthroplasty ◽  
Shoulder Joint ◽  
Glenohumeral Joint ◽  
Total Shoulder Arthroplasty ◽  
Biomechanical Analysis ◽  
Collateral Ligaments ◽  
Degree Of Stability ◽  
High Degree

The biomechanics of the glenohumeral joint depend on the interaction of both static and dynamic stabilizing structures. The combined effect of these stabilizers is to support the multiple degrees of motion within the glenohumeral joint. Total shoulder arthroplasty requires release of contracted tissues, repair of rotator cuff defects, reconstruction of normal skeletal anatomy with proper sizing, and positioning of components. Arthroplasty of the shoulder is unlike arthroplasty of the hinge joints when the collateral ligaments afford a high degree of stability and is even distinct from the hip when bony conformity is large and range of motion is less. The goal of this paper is biomechanical analyses of normal, injured and implanted shoulder joint.

scholarly journals Accuracy of Humeral Implant Positioning Using a Canal-Sparing Total Shoulder Arthroplasty System

2019 ◽  
Vol 3 ◽  
pp. 247154921984483
Author(s):  
Eric S Baranek ◽  
David P Trofa ◽  
William N Levine ◽  
Steven S Goldberg
Keyword(s):  
Shoulder Arthroplasty ◽  
Humeral Head ◽  
Glenohumeral Joint ◽  
Total Shoulder Arthroplasty ◽  
Case Series ◽  
Humeral Head Prosthesis ◽  
The Difference ◽  
Clinically Significant ◽  
Shoulder Arthroplasties ◽  
Improved Accuracy

Background Accurate restoration of anatomy is critical in reestablishing proper glenohumeral joint function in total shoulder arthroplasty (TSA). However, even experienced surgeons inconsistently achieve anatomic restoration. This study evaluates whether a new canal-sparing arthroplasty system, designed using the principles of calibrated bone resection and incorporating a nonspherical humeral head prosthesis, can assist in more accurate and reliable reproduction of proximal humeral anatomy compared to a stemmed arthroplasty system. Methods The difference between the anatomic center of rotation (COR) of the humeral head and the postoperative prosthetic COR (defined as ΔCOR) was measured in a consecutive case series of 110 shoulder arthroplasties performed by a single surgeon. The first 55 cases used a stemmed arthroplasty system and the subsequent 55 cases used a new canal-sparing implant system that uses a multiplanar osteotomy (MPO) during humeral head preparation. Cases with ΔCOR ≥3.0 mm were deemed clinically significant outliers. Results The average ΔCOR in the MPO group was 1.7 ± 1.2 mm versus 2.8 ± 1.5 mm in the stemmed group ( P = .00005). The incidence of outliers was lower (14.5% vs 40.0%, P = .005), and there were more cases with a ΔCOR ≤1.0 mm (32.7% vs 3.6%, P = .0001) in the MPO group compared to the stemmed group. Conclusion The MPO TSA system provided improved accuracy and precision in restoring proximal humeral anatomy compared to stemmed arthroplasty systems, even in its initial use. This alternative method of humeral replacement may increase consistency in restoring proper anatomy and kinematics in TSA.

scholarly journals Reverse total shoulder arthroplasty: research models

Joints ◽  
2016 ◽  
Vol 04 (04) ◽  
pp. 236-246
Author(s):  
Stefano Petrillo ◽  
Umile Longo ◽  
Lawrence Gulotta ◽  
Alessandra Berton ◽  
Andreas Kontaxis ◽  
...  
Keyword(s):  
Shoulder Arthroplasty ◽  
Considerable Increase ◽  
Glenohumeral Joint ◽  
Total Shoulder Arthroplasty ◽  
Reverse Total Shoulder Arthroplasty ◽  
Shoulder Prosthesis ◽  
Biomechanical Models ◽  
Reverse Total Shoulder Replacement ◽  
Reverse Total Shoulder

Purpose:the past decade has seen a considerable increase in the use of research models to study reverse total shoulder arthroplasty (RTSA). Nevertheless, none of these models has been shown to completely reflect real in vivo conditions. Methods: we performed a systematic review of the literature matching the following key words: “reverse total shoulder arthroplasty” or “reverse total shoulder replacement” or “reverse total shoulder prosthesis” and “research models” or “biomechanical models” or “physical simulators” or “virtual simulators”. The following databases were screened: Medline, Google Scholar, EMBASE, CINAHIL and Ovid. We identified and included all articles reporting research models of any kind, such as physical or virtual simulators, in which RTSA and the glenohumeral joint were reproduced. Results: computer models and cadaveric models are the most commonly used, and they were shown to be reliable in simulating in vivo conditions. Bone substitute models have been used in a few studies.Mechanical testing machines provided useful information on stability factors in RTSA. Conclusions: because of the limitations of each individual model, additional research is required to develop a research model of RTSA that may reduce the limitations of those presently available, and increase the reproducibility of this technique in the clinical setting.

The effects of prosthetic humeral head shape on glenohumeral joint kinematics during humeral axial rotation in total shoulder arthroplasty

2016 ◽  
Vol 25 (7) ◽  
pp. 1084-1093 ◽  
Author(s):  
Bong Jae Jun ◽  
Thay Q. Lee ◽  
Michelle H. McGarry ◽  
Ryan J. Quigley ◽  
Sang Jin Shin ◽  
...  
Keyword(s):  
Shoulder Arthroplasty ◽  
Humeral Head ◽  
Glenohumeral Joint ◽  
Total Shoulder Arthroplasty ◽  
Axial Rotation ◽  
Joint Kinematics ◽  
Head Shape

Biomechanics of Reverse Total Shoulder Arthroplasty

2013 ◽  
Author(s):  
Heath B. Henninger ◽  
Robert T. Burks ◽  
Robert Z. Tashjian
Keyword(s):  
Shoulder Arthroplasty ◽  
Proximal Humerus Fracture ◽  
Proximal Humerus ◽  
Glenohumeral Joint ◽  
Total Shoulder Arthroplasty ◽  
Revision Arthroplasty ◽  
Reverse Total Shoulder Arthroplasty ◽  
Functional Improvement ◽  
Glenoid Surface ◽  
Reverse Total Shoulder

Reverse total shoulder arthroplasty (rTSA) provides significant pain relief and functional improvement in patients with a deficient rotator cuff, 4-part proximal humerus fracture, inflammatory arthritis or revision arthroplasty.[1, 2] As a non-anatomic procedure, rTSA transposes the ball and socket in the glenohumeral joint, allowing the deltoid to initiate elevation of the arm, provide stability and minimize shear forces acting at the glenoid surface.[3, 4]

scholarly journals The effect of operative time on early postoperative complications in total shoulder arthroplasty: An analysis of the ACS-NSQIP database

2019 ◽  
pp. 175857321987657
Author(s):  
Jacob M Wilson ◽  
Russell E Holzgrefe ◽  
Christopher A Staley ◽  
Spero Karas ◽  
Michael B Gottschalk ◽  
...  
Keyword(s):  
Postoperative Complications ◽  
Shoulder Arthroplasty ◽  
Operative Time ◽  
Glenohumeral Joint ◽  
Total Shoulder Arthroplasty ◽  
Provider Education ◽  
Level Of Evidence ◽  
Acs Nsqip ◽  
Increased Risk ◽  
Acs Nsqip Database

Background Total shoulder arthroplasty has been demonstrated to be an effective treatment for arthritis of the glenohumeral joint. Prior studies have identified longer operative times as a risk factor for complications after numerous types of procedures. We hypothesized that increased operative time, in 20-min intervals, would be associated with complications following total shoulder arthroplasty. Methods Patients undergoing total shoulder arthroplasty from 2006 to 2015 were identified from the ACS-NSQIP database. Patient demographic information, perioperative parameters, and 30-day outcomes were retrieved. Pearson's Chi-square test and multivariate Poisson regression with robust error variance were used to analyze the relationship of operative time and outcomes. Results A total of 10,082 patients were included. Multivariate analysis revealed that for each increase in 20 min of operative time, there were significantly increased rates of any complication (relative risk (RR) 1.24, 95% confidence interval (CI) 1.19–1.26), anemia requiring transfusion (RR 1.33, 95%CI 1.26–1.4), peripheral nerve injury (RR 1.88, 95%CI 1.53–2.31), and urinary tract infection (RR 1.24, 95%CI 1.09–1.41). Discussion This study indicates that increasing operative time confers increased risk for postoperative complications following total shoulder arthroplasty. We anticipate the results of this manuscript will be used for provider education, policy decision-making, and potentially to derive algorithms that can improve safety and efficiency in total shoulder arthroplasty. Level of evidence III.

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