Wear of Domestic Pit and Fissure Sealants after Simulated Brushing

Objective: The purpose of this study was to compare the physical property in abrasive wear of domestic and imported pit and fissure sealants by measuring the volume loss and the depth change after simulated brushing. Methods: A hundred and twenty samples of pit and fissure sealants were prepared in metal molds. The samples were randomly divided into four groups according to materials tested; Prevocare opaque, Prevocare clear (Chulalongkorn University, Thailand) Concise White Sealant (3M ESPE, USA) and Delton clear (Dentsply, USA). Prior to testing, the specimens were stored in an incubator at 37°C and 100% relative humidity. Using eight samples per cycle, the specimens were subjected to 20,000 strokes at 90 cycles per minute, with a brush-head pressure of 200 gram on V-8 Cross Brushing Machine (SABRI Dental Enterprises, Inc., USA) in the reference abrasive slurry (ISO 11609:1995). Changes in volume and depth of each sample after brushing cycles were determined by a Profilometer (TalyScan 150, Taylor Hobson Ltd., England), scanned in the area of 3×1 mm². The data of volume loss and depth changes were analyzed by one-way analysis of variance (ANOVA) at a significant level of .05. Results: The results showed no significant differences in either volume loss or depth changes between material groups. Conclusion: It was concluded that the domestic sealants were similar in brushing wear property to the imported materials.