Effect of degradation time on the Uniaxial Fatigue Behaviour of Self-Reinforced Polylactide-Calcium Phospate Composites

摘要

The development of bioresorbable and simultaneously bioactive PLA-based composites has progressed from partially absorbable PLA composite reinforced with carbon fibres to totally absorbable composites reinforced with calcium phosphates, such as hydroxyapatite (HA)1 and tricalcium phosphate (TCP), particles or fibres or bioactive glass particles and with PLA fibres.There are two major targets in the production of bioresorbable composites of degradable polymers filled with bioceramics or bioglasses, which are to increase the mechanical properties and to increase the bioactivity, allowing higher load bearing applications and achieving bone bonding to the implant interfaces thus accelerating the fracture healing. Most potential clinical applications are subjected to cyclic loading. This study investigates the effect of the degradation on the quasi static strenght and fatigue properties of PLA reinforced with PLA fibres and TCP particles.