치과용 자동바렐연마기의 연마시간에 따른 3종 레진의 표면거칠기 관찰
Observation of surface roughness on three types of resin based on grinding time of dental automatic barrel finishing
정안나, 고현정, 박유진,
소속 상세정보
정안나 ( Jung An-Na ) - Catholic University of Pusan Department of Dental Laboratory Science
고현정 ( Ko Hyeon-Jeong ) - Catholic University of Pusan Department of Dental Laboratory Science
박유진 ( Park Yu-Jin ) - Catholic University of Pusan Department of Dental Laboratory Science
Abstract
Purpose: This study aimed to produce resin prosthetics using a dental automatic barrel finishing.
Surface roughness and surface topography of resins were observed according to the grinding time of the dental automatic barrel finishing.
Methods: This study was performed with thermopolymer, autopolymer, and photopolymer resins. The dimensions of the specimen were 10×10×2 mm. Each specimen was polymerized according to the manufacturer's instructions. The polymerized resin was honed for 30 minutes at 5-min intervals in a dental automatic barrel finishing. The specimen was observed using a three-dimensional (3D) optical microscope, and the surface roughness was measured.
Results: After the polishing with the dental automatic barrel finishing, the heat-cured (HC) specimen showed the highest and lowest values of Ra after 10 and 15 minutes, respectively.
The self-cured (SC) specimen showed the highest and lowest values of Ra after 10 and 25 minutes, respectively. Finally, the 3D specimen showed the highest and lowest values of Ra after 5 and 20 minutes, respectively.
Conclusion: After measuring the surface roughness of the three types of resins according to the grinding time of the dental automatic barrel finishing, the lowest Ra values for the HC, SC, and 3D specimens were measured after 15, 25, and 20 minutes, respectively. Therefore, we concluded that a limit on the grinding time of the resin using a dental automatic barrel finishing is needed.
키워드
Barrel finishing; Grinding time; Ra; Resin; Surface roughness
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