Tribology of UHMWPE in the Hip

Ali, Murat; Al-Hajjar, Mazen; Jennings, Louise

doi:10.1016/b978-0-323-35401-1.00031-4

Cited by 3 publications

(3 citation statements)

References 123 publications

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“…In total hip replacement where bearings are both spherical and perfectly congruent and the motion is pure sliding, the UHMWPE wear rate increases with the use of a larger diameter femoral head due to increased sliding distance and contact area for the same angular motion. 44,45…”

Section: Discussionmentioning

confidence: 99%

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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Section: Discussionmentioning

confidence: 99%

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

Banci¹,

Meoli²,

Hintner³

et al. 2019

Shoulder & Elbow

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“…Defined as a ratio of frictional force to applied normal force, COF varies broadly with system conditions, including material properties, kinematic parameters, loading (gait cycle), lubricant type and surface roughness, etc. [191,192] For any bearing joint, the lower the COF, the better it is. This should be considered while developing new variants of UHMWPE.…”

Section: Clinically Relevant Propertiesmentioning

confidence: 99%

“…Among the screening techniques, hip simulation is found to be the most reliable technique to assess the tribological performance of biomaterials [201], as it can effectively mimic natural joint-like conditions in vitro . The complexity of the joint configuration, and other material design aspects, especially the roughness of the counterface, femoral head diameter, clearance, and sphericity, etc., have also been shown to affect the resulting wear properties significantly [192].…”

Section: Clinically Relevant Propertiesmentioning

confidence: 99%

Six decades of UHMWPE in reconstructive surgery

Chowdhury

Keshavan

Basu

2022

International Materials Reviews

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Ultra-high molecular weight polyethylene (UHMWPE) materials have played a significant role in the field of reconstructive surgery, particularly as acetabular liners/sockets for total hip joint replacement (THR), and tibial inserts for total knee joint replacement (TKR). This review aims to provide a perspective on key elements regarding the processing-structure-property relationship of UHMWPE and derivatives. Much emphasis will be provided to discuss the clinically relevant properties of UHMWPE blend/composite formulation, Vitamin-E reinforced or highly crosslinked variants. In addition, we provide clinical insights into the role of wear debris in inflammation and osteolysis. The relatively unexplored domain of UHMWPE additive manufacturing. Finally, the relatively unexplored domain of UHMWPE additive manufacturing and the opportunities associated with the next generation of UHMWPE implants are highlighted.

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