복합레진 수복물의 미세누출 감소를 위한 레진 전색제의 효과

Abstract

The purpose of this study was to compare the ability of three resin surface sealants to prevent microleakage in Class V composite resin restorations. Forty Class V cavities with the occlusal margin in enamel and gingival margin in dentin were prepared on the buccal surfaces of sound extracted molars, and restored with composite resin. Restorations were randomly assigned into one of four equal groups (n=10): a control, without resin sealing, and three experimental groups in which margins were sealed with Fortify Plus, Biscover and Permaseal, respectively. Specimens were thermocycled, immersed in a 2% methylene blue solution for 4 hours, sectioned longitudinally, and analyzed for leakage at the occlusal and gingival margins. The results of this study were as follows; 1. There was not statistically different leakage at the occlusal margins for unsealed control group and all sealed groups. 2. At gingival margin, control and Fortify Plus group showed statistically higher microleakage than PermaSeal group, and Fortify Plus group also showed higher microleakage than BisCover group (p < 0.05). 3. Control and Fortify Plus group showed statistically different between microleakage of occlusal and gingival margins (p <0.05). 4. Biscover and Permaseal group showed not statistically different between microleakage of occlusal and gingival margins. In conclusion, the ability to reduce microleakage at occlusal margins was were similar in all of three sealants. But at gingival margin, it depended on type of used resin surface sealant.