应用显微硬度比较化学机械法与传统机械法去龋效果的研究

Comparison on caries removal between chemomechanical method and conventional method using dentine microhardness

摘要:

目的：比较伢典化学机械去龋和传统机械去龋后牙本质表面的显微硬度。方法：选取龋坏达牙本质层但未累及牙髓的乳磨牙、恒磨牙各10颗，沿龋洞中心纵剖为2部分，一半用伢典去龋，一半用慢速球钻去龋，显微硬度测量仪测定去龋后洞底表面及窝洞周围正常牙本质的显微硬度。结果：乳牙，２种方法去龋后龋面牙本质及正常牙本质差异无统计学意义（P >0.05）；恒牙：伢典去龋后龋面牙本质与球钻去龋后差异无统计学意义（P >0.05），但与正常牙本质有统计学差异（P=0.008）。结论：伢典能有效去除龋坏牙本质，去龋后的牙本质矿化程度与机械去龋相当。

Abstract:

Objective：To compare the residual dentinal surface following caries removal between Carisolv and conventional bur meth－ods using microhardness test. Methods：Ten decayed primary molars and ten permanent molars with dentinal caries but not involving the pulp were collected. All the teeth were sectioned into two parts along the center of the cavity. Carisolv system was compared with slow-speed bur in eliminating caries. Then microhardness test was performed on the floor of the cavity and the surrounding healthy dentin. Results：Primary teeth：there was no statistically significant difference in caries-affected dentine and healthy dentine after the two methods（P >0.05）. Permanent teeth：there was no statistically significant difference in caries-affected dentine after the two meth－ods（P >0.05）；statistically significant differences were observed in healthy dentine between the two methods（P=0.008）. Conclusion：Carisolv can remove caries efficiently and has similar mineralization of healthy dentine as conventional bur methods.