The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
권호 표지

EFFECT OF SECONDARY HEAT TREATMENT ON DIMENSIONAL CHANGES OF ACRYLIC RESIN PARTIAL DENTURE BASE

2차 가열에 의한 국소의치상의 변형에 관한 실험적 연구

  • Jang, Byung-Gun (Department of Dental Science, College of Dentistry Yonsei University) ;
  • Lee, Ho-Yong (Department of Dental Science, College of Dentistry Yonsei University)
  • 장병건 (연세대학교 치과대학 보철학교실) ;
  • 이호용 (연세대학교 치과대학 보철학교실)
  • Published : 1989.06.01
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Abstract

The purpose of this study was to investigate the effect of secondary heat treatment on dimensional changes of acrylic resin partial denture base. For this study, 6 specimens were made: 2 groups of 2 specimens, each was treated with $125^{\circ}C$ dry heat and glycerine heat for 3 minutes, and the others were prepared for control group. The change of the internal diameter of specimens were measured after 3 hrs, 1 day, 1 week, 2 weeks, 4 weeks by three-dimensional space analyzer. The results were as follows : 1. All of the acrylic resin denture bases showed tissue ward thermal contraction. 2. Thermal contraction of the mesial area reinforced with metal framework was lesser than that of the distal area without metal framework. 3. Thermal contraction of the lingual flange reinforced with metal framework occured more slowly than that of the buccal flange without the metal framework. 4. The thermal contraction of dry heat treated acrylic resin base, compared to glycerine heat group, was moderately greater and occurred acutely.

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