The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
권호 표지

IN VITRO STUDY OF TOOTH TEMPERATURE CHANGE DURING POLYMERIZATION REACT10N OF THE COLD-CURED RESINS USED IN PROVISIONAL CROWN AND FIXED PARTIAL DENTURES

자가 중합 임시수복용 레진의 경화 시 외부환경 변화에 따른 치아의 온도변화

  • Oh, Wu-Sik (Department of Prosthodontics, Division of Dentistry, Graduate School, Kyung Hee University) ;
  • Baik, Jin (Department of Prosthodontics, Division of Dentistry, Graduate School, Kyung Hee University) ;
  • Kim, Hyung-Seob (Department of Prosthodontics, Division of Dentistry, Graduate School, Kyung Hee University) ;
  • Woo, Yi-Hyung (Department of Prosthodontics, Division of Dentistry, Graduate School, Kyung Hee University)
  • 오우식 (경희대학교 치과대학 치과보철학교실) ;
  • 백진 (경희대학교 치과대학 치과보철학교실) ;
  • 김형섭 (경희대학교 치과대학 치과보철학교실) ;
  • 우이형 (경희대학교 치과대학 치과보철학교실)
  • Published : 2006.10.31
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Abstract

Statement of the problem: The cold-cured resins used in fabrication of the provisional crown and fixed partial dentures could cause pulpal damage by heat generated during exothermic polymerization reactions. Purpose: In this in vitro study investigates the how external conditions such as material of the matrix, thickness of the matrix and thickness of dentin affect the temperature of the tooth during polymerization reaction of the cold-cured resins. Material and methods : To measure the temperature of the resin, metal die was maintained to the temperature of $37^{\circ}C$ with water bath to simulate the temperature of thetooth and thermocouple was placed in the center of the metal die. Acrylic pipe was cut in height of 1, 2, 3, 6, 10 mm and placed on the metal die and mixed resin was pored in the acrylic pipe As the resin polymerized temperature was recorded with the thermometer. Temperature of the resin using matrix was recorded by using the individual tray relieved in different thickness 2, 5, 7, 10 mm. The material of the matrix was irreversible hydrocolloid impression material, vinyl polysilloxane impression material and vacuum-formed template Temperature rise of the resin using different thickness of tooth section was record ed by placing tooth section on the metal die and placing resin over the tooth section. Results : Conclusion : 1. Temperature rise increased as the thickness of the resin increased but there was no significant differences over 3 mm thickness of the resin. 2. The lowest temperature rise was showed in irreversible hydrocolloid impression material and vinyl polysilloxane impression material vacuum-formed template as in orders. 3, Temperature rise of the resin decreased regardless of the thickness of the matrix when vinyl polysilloxane impression material was used as the matrix. 4 When irreversible hydrocolloid impression material was used as matrix, the temperature rise of the resin decreased as the thickness of the matrix increased and there was no temperature rise when thickness of the matrix reached 10 mm, 5. The temperature rise of the resin did not decreased when Polypropylene vacuum-formed template was used as the matrix. 6, The temperature of the resin increased as the thickness of the dentin decreased.

Keywords

References

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