Application of selective laser melting in manufacturing of dental prostheses

2016 Fiscal Year Final Research Report

• Project/Area Number: 26861627
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Prosthodontics/ Dental materials science and
• Research Institution: Tokyo Medical and Dental University
• Principal Investigator: Takaichi Atsushi 東京医科歯科大学, 歯学部附属病院, 助教 (30707047)
• Co-Investigator(Renkei-kenkyūsha): KAJIMA YUKA 東京医科歯科大学, 歯学部附属病院, 医員 (70778977)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: レーザー積層造形法 / 異方性 / 疲労強度

Outline of Final Research Achievements

The mechanical properties and fatigue strength of Co-Cr alloy specimens prepared by selective laser melting (SLM) using three different build directions were investigated and compared to those of cast specimens.The SLM specimens showed no obvious mechanical anisotropy in tensile tests and exhibited significantly higher yield strength and ultimate tensile strength than the cast specimens under all conditions. In contrast, a high degree of anisotropy in fatigue performance associated with the build orientation was found and, in some building directions, fatigue strength of SLM builds was significantly shorter than that in the cast specimens.This could be due to a number of factors, such as surface roughness, crystal orientation, residual stress, and molten pool boundaries.

Free Research Field

歯科補綴