Surface evaluation of recycled nylon for FDM 3D printing for the purpose of dental prosthesis construction

Fused deposition modeling (FDM) is 3D printing technology that is used in many fields in today's world. In dentistry, FDM is mainly used to produce dental models and appliances by using polymers in filament form. This study aimed to evaluate the usage of recycled nylon filament in terms of surface hardness, surface roughness and build-up thickness. In this study, the recycling process was conducted by polymer compounding extrusion machine at a temperature of 250