The application of high-pressure polymerization of denture base resin to CAD/CAM denture

2014 Fiscal Year Final Research Report

• Project/Area Number: 25893068
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Prosthodontics/ Dental materials science and
• Research Institution: Tokyo Medical and Dental University
• Principal Investigator: MURAKAMI Natsuko 東京医科歯科大学, 医歯(薬)学総合研究科, 助教 (80706995)
• Project Period (FY): 2013-08-30 – 2015-03-31
• Keywords: 義歯床用レジン / 機械的性質 / 超高圧重合 / 補綴 / CAD/CAM

Outline of Final Research Achievements

This research aimed to evaluate the application of high-pressure polymerization to CAD/CAM denture. This study objectives were especially focused on the mechanical properties of denture base polymerized under high-pressure. A heat-curing denture base resin and auto-curing denture base were polymerized under high-pressure up to 980 MPa by means of an isostatic pressurization machine to make specimens, and the specimens were subjected to a three-point bending test. The molecular weight of the PMMA was analyzed using the high-speed liquid chromatography system. Increased ductility without fracture was shown in the specimens subjected to high pressure, while most of the control specimens fractured. There were certain amounts of higher molecular weight polymers in the high pressure specimens than were present in the controls. The result suggests a potential application of the high-pressure polymerization to the development of PMMA-based denture resin with improved fracture resistance.

Free Research Field

有床義歯