title: The study of lifetime of polymer and composite bone joint screws under cyclical loads and in vitro conditions.
abstract: The "strain-life time" method has been adapted for life-time prediction of polymer and composite bone joint screws. Mechanical and fatigue properties of screws made of biostable (polysulfone), biosorbable (poly(lactide-co-glycolide) and short carbon fibre reinforced polymer composite materials have been examined in this study. The lifetime predictions under in vitro conditions were calculated for polymer and composite implants. The forecasting of joint screws stability under conditions close to natural body environment is shown to be feasible based on equations describing lifetime of the examined joint screws.
authors.affiliation: Department of Biomaterials, Faculty of Materials Science and Ceramics, AGH-University of Science and Technology, al. Mickiewicza 30/A3, 30-059 Krakow, Poland. chlopek@uci.agh.edu.pl
authors.forename: Chłopek
authors.initials: C
authors.lastname: Jan
authors.forename: Kmita
authors.initials: K
authors.lastname: Grzegorz
mesh_terms: D000704:Analysis of Variance; D001672:Biocompatible Materials; D001696:Biomechanical Phenomena; D001863:Bone Screws; D002244:Carbon / Q000737:chemistry*; D000077482:Carbon Fiber; D004548:Elasticity; D008422:Materials Testing; D011108:Polymers / Q000737:chemistry*; D013314:Stress, Mechanical; D013450:Sulfones / Q000737:chemistry*; D013997:Time Factors
chemical_list: D001672:Biocompatible Materials; D000077482:Carbon Fiber; D011108:Polymers; D013450:Sulfones; C017662:polysulfone P 1700; D002244:Carbon