Creep Behavior of Biodegradable Triple-Component Nanocomposites Based on PLA/PCL/Bioactive Glass for ACL Interference Screws

Background: The short-time creep behavior for a series of biodegradable nanocomposites which is used as implantable device into body is a crucial factor. In the current paper, we aimed to study the effect of bioactive glass nanoparticles (BGn) on creep and creep-recovery behaviors of PLA/PCL blends at different given load and different applied temperatures. Method: A series of biodegradable nanocomposites consisted of PLA/PCL blend (comprising 80 parts PLA and 20 parts PCL) with different amount of m-BGn fillers prepared by employing the evaporated solvent casting technique. Creep and creep recovery behavior of all specimens at different valuable stresses of 3 and 6 Mpa and different given temperature of 25 and 37 ℃ was studied. Results: In all cases, the BGn improved the creep resistance of the nanocomposites due to the retardation effect during creep of the nanocomposite systems. The acquired results in the terms of creep and creep recovery properties determine that the nanocomposites of PLA/PCL/BGn, can be satisfy the required conditions of a appropriate ACL reconstruction screws. Conclusion: The as-obtained results confirm the BGn play impeding role for PLA/PCL chains movement increasing the creep resistance. The results determine that the nanocomposites of PLA/PCL and BGn, can be satisfy the required circumstances of a proper ACL reconstruction screws.