Comparison of polymer-based temporary crown and fixed partial denture materials by diametral tensile strength.
10.4047/jap.2010.2.1.14
- Author:
Seung Ryong HA
;
Jae Ho YANG
;
Jai Bong LEE
;
Jung Suk HAN
;
Sung Hun KIM
- Publication Type:Original Article ; Randomized Controlled Trial
- Keywords:
Polymer-based temporary crown and fixed partial denture materials;
Diametral tensile strength
- MeSH:
Acrylic Resins;
Bisphenol A-Glycidyl Methacrylate;
Collodion;
Composite Resins;
Crowns;
Denture, Partial, Fixed;
Methacrylates;
Polymethacrylic Acids;
Tensile Strength
- From:The Journal of Advanced Prosthodontics
2010;2(1):14-17
- CountryRepublic of Korea
- Language:English
-
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 (the empty set 4 mm x 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 (alpha = 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. CONCLUSION: 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.
