OBJECTIVE: The purpose of this pilot study (n=3) was to compare the loosening performance of glenoid prosthesis design pairs where only one design variable differed. DESIGN: Glenoids were subjected to dynamic edge loading in a biaxial test setup. BACKGROUND: Glenoid component loosening is the primary concern in total shoulder arthroplasty. METHODS: After the humeral head was cycled 100,000 times to the superior and inferior edges of the glenoid, the tensile edge displacements were measured under superior and inferior off-center loading. RESULTS AND CONCLUSIONS: Based on this study, a rough-backed design had dramatically better loosening performance than a smooth-backed; curved-backed was superior to flat-backed; a less-constrained articular surface was better than a more-constrained articular surface; pegs outperformed a keel; threaded pegs were marginally preferable to cylindrical pegs; and an all-polyethylene design rocked slightly less than a metal-mesh-backed design. RELEVANCE: A comparison of the laboratory loosening behavior of glenoid prostheses may lead to improved designs, subsequently leading to a reduction in the incidence of clinical loosening.
OBJECTIVE: The purpose of this pilot study (n=3) was to compare the loosening performance of glenoid prosthesis design pairs where only one design variable differed. DESIGN: Glenoids were subjected to dynamic edge loading in a biaxial test setup. BACKGROUND: Glenoid component loosening is the primary concern in total shoulder arthroplasty. METHODS: After the humeral head was cycled 100,000 times to the superior and inferior edges of the glenoid, the tensile edge displacements were measured under superior and inferior off-center loading. RESULTS AND CONCLUSIONS: Based on this study, a rough-backed design had dramatically better loosening performance than a smooth-backed; curved-backed was superior to flat-backed; a less-constrained articular surface was better than a more-constrained articular surface; pegs outperformed a keel; threaded pegs were marginally preferable to cylindrical pegs; and an all-polyethylene design rocked slightly less than a metal-mesh-backed design. RELEVANCE: A comparison of the laboratory loosening behavior of glenoid prostheses may lead to improved designs, subsequently leading to a reduction in the incidence of clinical loosening.
Authors: Bradley Schoch; Jean-David Werthel; Cathy Schleck; John W Sperling; Robert H Cofield Journal: Int Orthop Date: 2015-08-06 Impact factor: 3.075
Authors: Bart Middernacht; Pieter-Jan De Roo; Georges Van Maele; Lieven F De Wilde Journal: Clin Orthop Relat Res Date: 2008-03-06 Impact factor: 4.176
Authors: Abdul Hadi Abdul Wahab; Mohammed Rafiq Abdul Kadir; Muhammad Noor Harun; Tunku Kamarul; Ardiyansyah Syahrom Journal: Med Biol Eng Comput Date: 2016-06-02 Impact factor: 2.602