|
KMID : 1035320170440040311
|
|
Korean Society for Dental Materials
2017 Volume.44 No. 4 p.311 ~ p.318
|
|
|
Effect of polymerization temperature on the mechanical properties of provisional prosthesis resins
|
|
Hong Min-Ho
Ha Jung-Yun
Kwon Tae-Yub
|
|
|
Abstract
|
|
|
|
The purpose of this study was to examine the effects of the curing sequence and polymerization temperature on the flexural strength and microhardness of two provisional resins (Bis-acryl resin composite and polymethyl methacrylate(PMMA)). Polymerization was carried out under various conditions, in air at 25℃ (control) and in hot water (40, 50, 60, 70, and 80℃). The flexural strength test was conducted according to ISO-4049. The Knoop hardness was measured. For the Bis-acryl resin, the temperature up to 50℃ did not increase the flexural strength nor the hardness of the bis-acryl resin composite (p>0.05) but higher temperatures increased the strengths. For the PMMA resin, flexural strength increased with temperatures up to 70℃ and then decreased slightly. Bis-acryl resin composite had higher mechanical properties than the PMMA resin. The effect of heat was more pronounced in the bis-acryl resin composite than in the PMMA resin (p<0.05).
|
|
|
KEYWORD
|
|
|
Polymerization temperature, Mechanical properties, Bis-acryl resin, PMMA resin
|
|
|
FullTexts / Linksout information
|
|
|
|
|
Listed journal information
|
|
|