Purpose Carbon-fibre reinforced polyetheretherketone CFR-PEEK plates is comparable or superior to locking screws (CFR-PEEK) plates have recently been introduced for in SS plates. proximal humerus fracture treatment. The purpose of this study was to compare the locking screw-plate inter- Keywords Proximal humerus fracture Carbon-fiber face stability in CFR-PEEK versus stainless steel (SS) polyetheretherketone Biomaterials proximal humerus plates. Methods Locking screw mechanical stability was evaluated independently in proximal and shaft plate holes. Stiffness Introduction and load to failure were tested for three conditions: (1) on- axis locking screw insertion in CFR-PEEK versus SS plates, Carbon-fibre-reinforced polyetheretherketone (CFR-PEEK) (2) on-axis locking screw insertion, removal, and reinsertion plates have recently been introduced for fracture treatment in CFR-PEEK plates, and (3) 10-degree off-axis locking . CFR-PEEK is a composite biomaterial composed of car- screw insertion in CFR-PEEK plates. Cantilever bending at bon fiber sheets embedded in a polyetheretherketone matrix. a rate of 1 mm/minute was produced by an Instron machine Compared with metal plates, CFR-PEEK plates have several and load-displacement data recorded. beneficial features. The elastic modulus of CFR-PEEK is clos- Results Shaft locking screw load to failure was significantly er to that of cortical bone, and its increased flexibility may greater in
International Orthopaedics – Springer Journals
Published: Jul 13, 2017
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