Comparison of polymer-based temporary crown and fixed partial denture materials by diametral tensile strength
하승룡, 양재호, 이재봉, 한중석, 김성훈,
소속 상세정보
하승룡 ( Ha Seung-Ryong ) - 아주대학교 의과대학 치과학교실
양재호 ( Yang Jae-Ho ) - 서울대학교 치과대학 치과보철학교실
이재봉 ( Lee Jai-Bong ) - 서울대학교 치과대학 치과보철학교실
한중석 ( Han Jung-Suk ) - 서울대학교 치과대학 치과보철학교실
김성훈 ( Kim Sung-Hun ) - 서울대학교 치의학전문대학원 치과보철학교실
KMID : 1023820100020010014
Abstract
Purpose: The purpose of this study was to investigate the diametral tensile strength of polymer-based temporary crown and fixed partial denture (FPD) materials, and the change of the diametral tensile strength with time.
Material and Methods: One monomethacrylate-based temporary crown and FPD material (Trim) and three dimethacrylate-based ones (Protemp 3 Garant, Temphase, Luxtemp) were investigated. 20 specimens (?. 4 mm × 6 mm) were fabricated and randomly divided into two groups (Group I: Immediately, Group II: 1 hour) according to the measurement time after completion of mixing. Universal Testing Machine was used to load the specimens at a cross-head speed of 0.5 mm/min. The data were analyzed using one-way ANOVA, the multiple comparison Scheffe test and independent sample t test (α= 0.05).
Results: Trim showed severe permanent deformation without an obvious fracture during loading at both times. There were statistically significant differences among the dimethacrylate-based materials. The dimethacrylate-based materials presented an increase in strength from 5 minutes to 1 hour and were as follows: Protemp 3 Garant (23.16 - 37.6 MPa), Temphase (22.27 - 28.08 MPa), Luxatemp (14.46 - 20.59 MPa). Protemp 3 Garant showed the highest value.
Conslusion: The dimethacrylate-based temporary materials tested were stronger in diametral tensile strength than the monomethacrylate-based one. The diametral tensile strength of the materials investigated increased with time.
키워드
Polymer-based temporary crown and fixed partial denture materials;Diametral tensile strength
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