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A Study on the Simplified Moiding Method for Resin Denture Bases Applied by Resin Injection System.

Research Project

Project/Area Number 61570922
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 補綴理工系歯学
Research InstitutionTokyo Medical and Dental University

Principal Investigator

FUKUDA Hideaki  Tokyo Medical and Dental University ・ Instructor, 医用器材研究所, 助手 (50014163)

Co-Investigator(Kenkyū-buntansha) TAKAYAMA Yoshiaki  Tokyo Medical and Dental University ・ Instructor, 歯学部, 助手 (80143593)
NAGAI Masahiro  Tokyo Medical and Dental University ・ Instructor, 医用器材研究所, 助手 (10013971)
MIYAIRI Hiroo  Tokyo Medical and Dental University ・ Professor, 医用器材研究所, 教授 (50013892)
Project Period (FY) 1986 – 1987
Project Status Completed (Fiscal Year 1987)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1987: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1986: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsInjection system / Simlified molding method / Polysulfone / Thinning / Molding condition / Flexural strength / ポリエーテルスルフォン / 薄肉レジン床義歯
Research Abstract

The manufacture of the denture bases was examined by using the injection molding system, varing the location of sprue and number of sprues for molding denture base. The resins used were polymethylmathacrylate(PMMA), polysulfone(PSF) and polyethersulfone(PES).
The mechanical properties of these denture bases, stiffness and strength, were investigated by 4-point bending system. The specimen for bending test was constrained with steel plates to the right and left molar sides of dentures, and then the bending moment is loaded on two steel plates.
The results obtained were as follows:
(1) The location of sprues were optimum at right and left sides of denture edge, using two sprues with 6 mm in diameter.
(2) the working houres were shorter than that of usual ones.
(3) The adjustment of denture bases was good comparing with that of usual ones.
(4) The mechanical properties of PSF and PES-dentures were excellent comparing with that of usal ones.

Report

(2 results)
  • 1987 Final Research Report Summary
  • 1986 Annual Research Report

URL: 

Published: 1987-03-30   Modified: 2016-04-21  

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