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. 2010 Mar;2(1):14-7.
doi: 10.4047/jap.2010.2.1.14. Epub 2010 Mar 31.

Comparison of polymer-based temporary crown and fixed partial denture materials by diametral tensile strength

Seung-Ryong Ha  1 , Jae-Ho Yang, Jai-Bong Lee, Jung-Suk Han, Sung-Hun Kim
Affiliations

Comparison of polymer-based temporary crown and fixed partial denture materials by diametral tensile strength

Seung-Ryong Ha et al. J Adv Prosthodont. 2010 Mar.

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 (ø 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.

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.

Keywords: Diametral tensile strength; Polymer-based temporary crown and fixed partial denture materials.

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Figures

Fig. 1
Fig. 1
Dimension of cylinder-shaped specimen. φ = 4 mm, L = 6 mm, P = load.
See this image and copyright information in PMC

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