The Effect of Different Curing Condition on the Flexural Strength and Translucency of Orthodontic Acrylic Resin / 대한치과재료학회지

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 0.05). 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 0.05). 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.