Application of porous titanium using moldless process for prosthesis

Research Project

Project/Area Number	15K11196
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Research Field	Prosthodontics/ Dental materials science and
Research Institution	The University of Tokushima
Principal Investigator	TOMOTAKE Yoritoki 徳島大学, 病院, 准教授 (70263853)
Co-Investigator(Kenkyū-buntansha)	内藤禎人徳島大学, 病院, 助教 (20509773)
Research Collaborator	PRANANINGRUM Widyasri 徳島大学, 大学院, 大学院生
Project Period (FY)	2015-04-01 – 2018-03-31
Project Status	Completed (Fiscal Year 2017)
Budget Amount *help	¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000) Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000) Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000) Fiscal Year 2015: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords	チタン / チタン－ワックス / 焼結体 / 補綴装置 / チタンフレーム / チタンーワックス
Outline of Final Research Achievements	This study aimed to evaluate the physical and mechanical properties of porous titanium using moldless processs with various particle sizes, shapes and mixing ratio of each titanium powder to wax binder for prosthesis. Cp Ti powders with different particle sizes, shapes and mixing ratio were divided into five groups. The shrinkage ratio of sintered specimens was in the range of 2.5-14.2%. The shrinkage ratio increased with decreasing particle size. The bending strength was demonstrated in the range of 106-428 MPa under the influence of porosity. The shear bond strength was in the range of 32-100 MPa. The shear bond strength was also particle-size dependent. The decrease in the porosity increased shrinkage and bending strength. Shrinkage and mechanical strength required for prosthesis were dependent on the particle size and shape of titanium powders. It was considered that this production method can be applied to the prosthetic framework by selecting the material design.