Photoelastic comparison of strains in the underlying glenoid with metal-backed and all-polyethylene implants
| Autor: | Andrew J. Langdown, R. Mark Gillies, Matthew H. Pelletier, David H. Sonnabend, William R. Walsh |
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| Rok vydání: | 2006 |
| Předmět: |
musculoskeletal diseases
medicine.medical_specialty medicine.medical_treatment Joint Prosthesis Strain (injury) Glenoid cavity Biocompatible Materials All polyethylene Bone remodeling Cadaver Medicine Humans Orthopedics and Sports Medicine Metal backed Arthroplasty Replacement Aged Orthodontics business.industry Shoulder Joint General Medicine Middle Aged medicine.disease Arthroplasty Surgery Biomechanical Phenomena Prosthesis Failure Shear (sheet metal) Scapula medicine.anatomical_structure Polyethylene Implant Bone Remodeling business Shear Strength |
| Zdroj: | Journal of shoulder and elbow surgery. 17(5) |
| ISSN: | 1532-6500 |
| Popis: | An alteration in the stress and strain environment following arthroplasty is believed to lead to bone remodeling, which can trigger implant loosening and subsequent failure. Bone remodeling, while well-studied in hip arthroplasty, has received less attention in total shoulder replacement. This study examines differences in strain states between intact glenoids and following replacement with an uncemented metal backed keeled component and a cemented all polyethylene pegged component with the same articular geometry, using the photoelastic method. Strain measurements were taken in glenoids before and after implantation under 4 loading conditions corresponding to 4 abduction angles: 0 degrees, 30 degrees, 60 degrees, and 90 degrees. Shear strains increased at most locations following reconstruction with both of the implants. Uncemented, keeled metal backed implants produced areas of higher cortical shear strains compared to cemented, all PE pegged implants. |
| Databáze: | OpenAIRE |
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