Study of Potential PCL for Bone Screw with Enhancement Mechanical Strength through Annealing Process
Abstract
This study was carried out to assess the potential mechanical properties of PCL (Polycaprolactone) applied as bone screws. PCL is a biocompatible and biodegradable, this material could be absorbed by the human body when used as a bone screw. However, PCL does not have high enough mechanical strength and stiffness, a micro injection molding process will be used to make PCL bone screws. To improve the mechanical strength and stiffness of the molded PCL screw, annealing was applied after the screws were molded. The experimental results showed that the strength at yield of the molded specimen was 15.855 MPa and the young modulus was 1.98 GPa while those of the after annealing specimen were 17.366 MPa and 3.47 GPa, respectively. Indicates that micromolding of a PCL can be improved by proper annealing process.
Keywords: Bone Screw, PCL (polycaprolactone), Micromolding Machine, Annealing, Tensile Test.
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