SUNConferences, 17th Annual Conference of the Rapid Product Development Association of South Africa

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EVALUATION OF THE COMPRESSIVE MECHANICAL PROPERTIES OF CELLULAR DMLS STRUCTURES FOR BIOMEDICAL APPLICATIONS
Thywill Cephas Dzogbewu, Monaheng L, Els J, van Zyl I, du Preez W B, Yadroitsava I, Yadroitsev I

Last modified: 2016-10-11

Abstract


The type of material used in biomedical applications depends on specific implant applications; different types of the implant need different mechanical properties. Since the architectures of bone tissues in the human body are not completely dense and solid, it is desirable to produce biomimic structures as a replacement for damaged bone tissues. Learning from nature, it can be understood that cellular structures would be more preferable for biomedical implants than dense solid structures. Ti6Al4V alloy is well known to have a superior track record as leading material for bone replacement since it is a light weight and biocompatible material, but the density of human cortical bone is 2 times lower than that of solid Ti6Al4V implants. The mismatch of the elastic modulus between such implants and bone tissue is one of the major causes of stress shielding, bone resorption and implant loosening. FEA has proven to be a very effective tool for predicting the biomechanical behavior of various implant designs as well as clinical factors on implant success. The elastic modulus of lattice structures would be used to stimulate a complex mandible to obtain foreknowledge of manufacturing advanced light-weight implants with suitable biomechanical properties.


Keywords


direct metal laser sintering, mechanical properties, FEM, Ti6Al4V, Mandible