Influence of joint kinematics on polyethylene wear in anatomic shoulder joint arthroplasty
Background - Despite the positive results in total shoulder arthroplasties (TSAs), a higher revision rate is documented compared with total hip and knee replacements. Wear is the possible main cause of TSA failure in the long-term. This study investigated the effect of joint kinematics and the influ...
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| Main Authors: | , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
23 April 2018
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| In: |
Journal of shoulder and elbow surgery
Year: 2018, Volume: 27, Issue: 9, Pages: 1679-1685 |
| ISSN: | 1532-6500 |
| DOI: | 10.1016/j.jse.2018.02.063 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1016/j.jse.2018.02.063 Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S1058274618301691 
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| Author Notes: | Steffen Braun, Stefan Schroeder, Ulrike Mueller, Robert Sonntag, Matthias Buelhoff, Jan Philippe Kretzer |
| Summary: | Background - Despite the positive results in total shoulder arthroplasties (TSAs), a higher revision rate is documented compared with total hip and knee replacements. Wear is the possible main cause of TSA failure in the long-term. This study investigated the effect of joint kinematics and the influence of the rotator cuff on the polyethylene wear performance in an anatomic TSA. - Methods - Lifting a load of 2 kg with an abduction/adduction of 0° to 90° was simulated for 2 × 106 cycles as a primary motion using a fully kinematic joint simulator. A combined rotation in anteversion-retroversion of ±5° and ±10° was also simulated. The force in the superior-inferior direction and the axial joint compression were applied under force control based on in vivo data of the shoulder. A soft tissue restraint model was used to simulate an intact and an insufficient rotator cuff. - Results - The highest wear rate in the intact rotator cuff group was 58.90 ± 1.20 mg/106 cycles with a combined rotation of ±10°. When an insufficient rotator cuff was simulated, the highest polyethylene wear rate determined was 79.67 ± 4.18 mg/106 cycles. - Conclusions - This study confirms a high dependency of the polyethylene wear behavior and dimension on the joint kinematics in total shoulder replacement. This can be explained by an increasing cross-shear stress on the polyethylene component. The results obtained indicate that additional combined kinematics are an indispensable part of wear tests on anatomic shoulder replacements. |
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| Item Description: | Gesehen am 06.08.2019 |
| Physical Description: | Online Resource |
| ISSN: | 1532-6500 |
| DOI: | 10.1016/j.jse.2018.02.063 |