Rotational dissociation of glenoid components in a total shoulder prosthesis: An indication that sagittal torque forces may be important in glenoid component design

1999 ◽  
Vol 8 (3) ◽  
pp. 279-280 ◽  
Author(s):  
Adam Y Feldman ◽  
Timothy D Bunker
Keyword(s):  
Shoulder Prosthesis ◽  
Glenoid Component ◽  
Component Design

scholarly journals Six-Year Experience with the Delta III Reverse Shoulder Prosthesis

2009 ◽  
Vol 17 (2) ◽  
pp. 151-156 ◽  
Author(s):  
Federico Alberto Grassi ◽  
Luigi Murena ◽  
Federico Valli ◽  
Riccardo Alberio
Keyword(s):  
Glenohumeral Joint ◽  
Functional Results ◽  
Shoulder Prosthesis ◽  
Glenoid Component ◽  
Main Concern ◽  
Massive Rotator Cuff Tear ◽  
Term Survival ◽  
Scapular Notching ◽  
Reverse Prosthesis ◽  
Humeral Component

Purpose. To report the clinical and radiographic results and complications of the Delta III reverse prosthesis. Methods. 24 women and 2 men aged 62 to 84 (mean, 75) years underwent total shoulder replacement using the Delta III reverse prosthesis. Patient diagnoses were massive rotator cuff tear (n=20), disabling sequelae of proximal humeral fractures (n=3), and failure of an unconstrained arthroplasty (n=3). Clinical and functional results were assessed using the Constant scale. Active range of motion (ROM) was measured. Scapular notching and radiolucent lines around the humeral component were evaluated using radiographs. Patient satisfaction of the treatment was evaluated by a direct interview. Results. 23 patients were followed up for 26 to 84 (mean, 42) months. Two patients had loosening of the glenoid component (at 6 months and 5 years) and underwent revision surgery. There were no instances of infection, instability, or acromial fracture. Only active elevation improved significantly after surgery, as did both the absolute and adjusted Constant scores. 12 patients were completely pain-free, 9 complained of slight pain, and one of moderate pain. The severity of scapular notching progressed with time. 15 patients were satisfied with the treatment, 6 were partially satisfied, and 2 were not satisfied. Conclusion. The Delta III prosthesis restores shoulder function but has biomechanical limits. Its use should be limited to elderly patients with severe impairment of the glenohumeral joint. Scapular notching is a main concern for the long-term survival of the implant.

Redesign of a Reverse Shoulder Prosthesis: Kinematic and Mechanical Study

2014 ◽  
Vol 670-671 ◽  
pp. 847-851 ◽  
Author(s):  
Davide Tumino ◽  
Tommaso Ingrassia ◽  
Vincenzo Nigrelli ◽  
Giovan Battista Trinca
Keyword(s):  
Surgical Procedure ◽  
Laser Scanner ◽  
Shoulder Prosthesis ◽  
Solid Model ◽  
Glenoid Component ◽  
Shear Forces ◽  
Final Model ◽  
Reverse Shoulder Prosthesis ◽  
Mechanical Study ◽  
The Common

In this work a commercial reverse shoulder prosthesis has been redesigned to improve performances in terms of range of movements of the implant and stability to dislocation. A kinematic and mechanic study has been performed using a realistic solid model of the prothesised shoulder: in particular, all the components of the prosthesis have been acquired via a 3D laser scanner and inserted in a virtual humerus-glenoid system by reproducing the common surgical procedure. The final model has been used to measure the maximum angles of abduction and rotation of the arm and the shear forces that cause dislocation. Modifications proposed to the commercial prosthesis are: a different orientation of the cutting plane of the glenoid component and the interposition of a spacer to move the center of rotation of the arm.

Midterm results of a total shoulder prosthesis fixed with a cementless glenoid component

2013 ◽  
Vol 22 (5) ◽  
pp. 628-635 ◽  
Author(s):  
Fredy Montoya ◽  
Petra Magosch ◽  
Bastian Scheiderer ◽  
Sven Lichtenberg ◽  
Patricio Melean ◽  
...  
Keyword(s):  
Shoulder Prosthesis ◽  
Glenoid Component ◽  
Midterm Results

The association between glenoid component design and revision risk in anatomic total shoulder arthroplasty

2020 ◽  
Vol 29 (10) ◽  
pp. 2089-2096 ◽  
Author(s):  
Mark T. Dillon ◽  
Priscilla H. Chan ◽  
Heather A. Prentice ◽  
William E. Burfeind ◽  
Edward H. Yian ◽  
...  
Keyword(s):  
Shoulder Arthroplasty ◽  
Total Shoulder Arthroplasty ◽  
Glenoid Component ◽  
Component Design ◽  
Revision Risk

Stress analysis of glenoid component in design of reverse shoulder prosthesis using finite element method

2013 ◽  
Vol 22 (7) ◽  
pp. 932-939 ◽  
Author(s):  
Ching-Chieh Yang ◽  
Chun-Lin Lu ◽  
Chun-Hung Wu ◽  
Jiunn-Jer Wu ◽  
Teng-Le Huang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stress Analysis ◽  
Shoulder Prosthesis ◽  
Glenoid Component ◽  
Reverse Shoulder Prosthesis ◽  
Element Method

Biomechanics Of Glenoid Component Design

2003 ◽  
Vol 4 (3) ◽  
pp. 110-120 ◽  
Author(s):  
Ian K.Y. Lo ◽  
Julie Y. Bishop ◽  
Vincent M. Wang ◽  
Evan L. Flatow
Keyword(s):  
Glenoid Component ◽  
Component Design

Bone ingrowth simulation for a concept glenoid component design

2005 ◽  
Vol 38 (5) ◽  
pp. 1023-1033 ◽  
Author(s):  
A. Andreykiv ◽  
P.J. Prendergast ◽  
F. van Keulen ◽  
W. Swieszkowski ◽  
P.M. Rozing
Keyword(s):  
Bone Ingrowth ◽  
Glenoid Component ◽  
Component Design

scholarly journals Wear performance of inverted non-conforming bearings in anatomic total shoulder arthroplasty

2019 ◽  
Vol 12 (1_suppl) ◽  
pp. 40-52
Author(s):  
Lorenzo Banci ◽  
Alessio Meoli ◽  
Martin Hintner ◽  
Hans Rudolf Bloch
Keyword(s):  
Vitamin E ◽  
Wear Rate ◽  
Shoulder Arthroplasty ◽  
Humeral Head ◽  
Total Shoulder Arthroplasty ◽  
Niobium Nitride ◽  
Shoulder Prosthesis ◽  
Glenoid Component ◽  
Uhmwpe Wear

Background Glenoid component failures still represent the most common complication in total shoulder arthroplasty. These failures depend on several factors, including ultra-high molecular weight polyethylene (UHMWPE) wear. One reason for UHMWPE wear in total shoulder arthroplasty may be the current use of a spherical prosthetic humeral head against a radially mismatched UHMWPE glenoid component, which leads to reduced glenohumeral translations, glenoid edge loading and high translational forces during shoulder motions. The aim of this study was to assess the in vitro wear of an anatomic total shoulder prosthesis with non-spherical non-conforming bearings with inverted conventional materials. Methods The wear of a vitamin E-blended UHMWPE non-spherical humeral head articulating against a non-conforming titanium-niobium nitride (TiNbN)-coated metallic glenoid was tested using a joint simulator. The wear test was performed by applying a constant load of 756 N with angular motions and translations. Results After 2.5 million cycles, the mean wear rate of the humeral head was 0.28 ± standard deviation (SD) 0.45 mg/million cycles. Conclusion The low wear rate of the vitamin E UHMWPE humeral head supports the use of non-spherical non-conforming bearings with inverted conventional materials in anatomic total shoulder arthroplasty.

Clinical and radiographic outcomes of total shoulder arthroplasty with a partially cemented all-polyethylene pegged bone-ingrowth glenoid component: a systematic review

2020 ◽  
pp. 175857322094416
Author(s):  
Michael-Alexander Malahias ◽  
Lazaros Kostretzis ◽  
Ioannis Gkiatas ◽  
Efstathios Chronopoulos ◽  
Emmanouil Brilakis ◽  
...  
Keyword(s):  
Systematic Review ◽  
Clinical Performance ◽  
Bone Ingrowth ◽  
Total Shoulder Arthroplasty ◽  
Glenoid Component ◽  
Level Of Evidence ◽  
Tissue Integration ◽  
Radiographic Outcomes ◽  
Component Design

Background Several articles have been published reporting on the clinical performance of a novel pegged, all-polyethylene glenoid component design which features a central peg, circumferentially fluted, interference-fit peg for tissue integration and three small peripheral pegs for cementing. However, no systematic review exists to this date. Methods The US National Library of Medicine (PubMed/MEDLINE), EMBASE, and the Cochrane Database of Systematic Reviews were queried for publications up to May 2020. Results Overall, 13 articles were included for analysis (560 operated shoulders, range of mean follow-up: 2–6 years). The survival rate was 98.2% (550 out of 560 cases), while the rate of aseptic loosening was 0.2% (1 out of 560 cases). There were 139 cases (out of 399 reported; 34.1%) with peri-glenoid radiolucency, and 35 cases (out of 223 reported; 15.7%) of asymptomatic central peg osteolysis, with 1 of them undergoing revision. Conclusions There was fair quality of evidence to show that partially cemented all-polyethylene pegged bone-ingrowth glenoid components produce promising results, with a low revision rate in the short- to medium-term follow-up. Nevertheless, this analysis showed high rates of both radiolucency of the glenoid component and osteolysis around the central peg which raise concern for potential failure of this glenoid component in the long-term follow-up. Level of evidence Systematic review, IV.

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