Shoulder Simulator Wear Test of Five Contemporary Total Shoulder Prostheses With Three Axes of Rotation and Sliding Motion

Smith, Simon; Kennard, Emma; Joyce, Thomas J.

doi:10.1016/j.biotri.2018.01.001

Cited by 8 publications

(4 citation statements)

References 36 publications

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“…Humeral head resurfacing is also more effective and protective than the “ream and run” procedure. In the “ream and run” procedure, the glenoid is made smooth by reaming but no glenoid implant is placed [ 4 , 21 , 26 , 27 , 28 ]. A stemmed humeral implant with a prosthetic humeral head articulates with the prepared glenoid.…”

Section: Discussionmentioning

confidence: 99%

Cementless Metal-Free Ceramic-Coated Shoulder Resurfacing

Pritchett

2023

JPM

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Shoulder resurfacing is a versatile, bone-conserving procedure to treat arthritis, avascular necrosis, and rotator cuff arthropathy. Shoulder resurfacing is of interest to young patients who are concerned about implant survivorship and those in need of a high level of physical activity. Using a ceramic surface reduces wear and metal sensitivity to clinically unimportant levels. Between 1989 and 2018, 586 patients received cementless, ceramic-coated shoulder resurfacing implants for arthritis, avascular necrosis, or rotator cuff arthropathy. They were followed for a mean of 11 years and were assessed using the Simple Shoulder Test (SST) and Patient Acceptable Symptom State (PASS). CT scans were used in 51 hemiarthroplasty patients to assess the glenoid cartilage wear. Seventy-five patients had a stemmed or stemless implant in the contralateral extremity. A total of 94% of patients had excellent or good clinical results and 92% achieved PASS. 6% of patients required a revision. A total of 86% of patients preferred their shoulder resurfacing prosthesis over a stemmed or stemless shoulder replacement. The glenoid cartilage wear at a mean of 10 years was 0.6 mm by a CT scan. There were no instances of implant sensitivity. Only one implant was removed due to a deep infection. Shoulder resurfacing is an exacting procedure. It is clinically successful, with excellent long-term survivorship in young and active patients. The ceramic surface has no metal sensitivity, very low wear, and, therefore, it is successful as a hemiarthroplasty.

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Section: Discussionmentioning

confidence: 99%

Cementless Metal-Free Ceramic-Coated Shoulder Resurfacing

Pritchett

2023

JPM

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“…The UHMWPE wear rate found in the present study was considerably reduced compared with wear rates reported in other shoulder in vitro studies. 14,25,43,[52][53][54][55] Mueller et al 52 reported significantly reduced wear rates for a ceramic humeral head against conventional UHMWPE glenoid compared with a conventional CoCr humeral head against the same glenoid component in an anatomic shoulder wear test. However, both wear results were in the same range as the wear rate reported by Wirth et al 25 with conventional UHWMPE.…”

Section: Discussionmentioning

confidence: 99%

“…The low number of cycles used in the present study is not considered an important limitation given that the wear rate of UHMWPE is linear after an initial bedding-in phase in which the wear rate is typically higher. 25,43,52,55 Thus, it is possible to determine whether our wear rate result is also valid for additional millions of cycles.…”

Section: Discussionmentioning

confidence: 99%

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

Banci¹,

Meoli²,

Hintner³

et al. 2019

Shoulder & Elbow

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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 AE 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 nonconforming bearings with inverted conventional materials in anatomic total shoulder arthroplasty. Keywords ultra-high molecular weight polyethylene wear, total shoulder arthroplasty, non-spherical humeral head, inverted bearing materials, non-conforming bearings Date

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Shoulder joint replacement

Joyce

2021

Joint Replacement Technology

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Shoulder Simulator Wear Test of Five Contemporary Total Shoulder Prostheses With Three Axes of Rotation and Sliding Motion

Cited by 8 publications

References 36 publications

Cementless Metal-Free Ceramic-Coated Shoulder Resurfacing

Cementless Metal-Free Ceramic-Coated Shoulder Resurfacing

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

Shoulder joint replacement

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