The Effect of Different Curing Condition on the Flexural Strength and Translucency of Orthodontic Acrylic Resin
10.14815/kjdm.2018.45.1.57
- Author:
Sun Mi JUNG
1
;
Mi Gyoung PARK
Author Information
1. Department of Dental Laboratory Science, College of Health Sciences, Catholic University of Pusan, Korea. mgpark@cup.ac.kr
- Publication Type:Original Article
- Keywords:
Orthodontic acrylic resin;
Flexural strength;
Transparency;
Curing condition
- MeSH:
Polymerization;
Polymers;
Water
- From:
Korean Journal of Dental Materials
2018;45(1):57-66
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
The purpose of this study is to evaluate the effects of polymerization conditions on the flexural strength and transparency of orthodontic acrylic resin. Materials and methods: The specimens were prepared by applying pressure of 1 bar, 2 bar and 4 bar in air, room temperature water, 50℃ water and 70℃ water. The flexural strength of each specimen was measured using a universal testing machine and the translucency parameter (TP) was calculated by measuring the CIE L*a*b* value of each specimen using a spectrophotometer. The flexural strength of orthodontic acrylic resin was the highest in water at 50℃, and the flexural strength was significantly lower in the order of 70℃ water, room temperature water and air (P < 0.01). As the pressure increased, the flexural strength of orthodontic acrylic resin did not show any significant difference (P>0.05). The transparency of orthodontic acrylic resin showed the highest value in air and was significantly lower in the order of room temperature, 50℃ water and 70℃ water (P < 0.001). The transparency of orthodontic acrylic resin did not show any significant difference with increasing pressure (P>0.05). Within the limits of this study, the flexural strength and transparency of the orthodontic acrylic resin differ according to polymerization conditions, but there is no difference according to the pressure.
