In-vitro evaluation of a polyurethane compliant-layer glenoid for use in shoulder arthroplasty.
A polyurethane glenoid component has been designed and manufactured as part of a total shoulder arthroplasty (TSA) system based on compliant-layer (CL) technology. Compared with conventional TSA designs, this biomimetic approach offers reduced friction and wear and potentially improved longevity. In-vitro evaluation of the glenoid system has included loosening and stability tests, and wear measurement using a specially constructed wear simulator. The results obtained support the hypothesis that a CL glenoid design may provide improved resistance to dynamic loosening and rim erosion, and demonstrate superior wear performance over a standard ultra-high molecular weight polyethylene design. This study not only confirms the feasibility of a CL glenoid component but also highlights the potential to increase implant longevity, thereby allowing earlier surgical intervention before poor glenoid bone stock and soft tissue compromise the outcome of TSA.
Geary
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Department of Materials Science and Technology, University of Limerick, Limerick, Ireland.
Jones
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E
Fitzpatrick
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D
Kelly
C P
CP
Birkinshaw
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C
D055119:Elastic Modulus; D019544:Equipment Failure Analysis; D006244:Hardness; D006801:Humans; D007595:Joint Prosthesis; D008422:Materials Testing; D011095:Polyethylenes / Q000737:chemistry*; D011474:Prosthesis Design; D012785:Shoulder Joint / Q000601:surgery*; D013499:Surface Properties
D011095:Polyethylenes; C111601:ultra-high molecular weight polyethylene