伢典化学机械法治疗乳牙龋病的细菌学研究

Microbiological study of Carisolv for the chemomechanical removal of dental caries in primary teeth

目的:比较化学机械去腐与牙钻去腐清除致龋菌的效果。方法选择32名由于乳牙龋来大庆油田总医院口腔科就诊的儿童,每人口腔内都存在两颗龋损程度相似的乳牙,其中一个用Carisolv去腐,另一个用牙钻去腐。去腐前后使用无菌挖匙对龋坏牙本质进行取样,样本系列稀释后分别在两种不同的培养基上进行厌氧培养。结果孵育24小时后分别对总的致龋菌和乳杆菌进行活菌计数。两种去腐方法都显著降低了致龋菌数量。但两种方法比较没有显著性差别。结论与传统牙钻相比,Carisolv化学机械法清除乳牙龋坏牙本质同样有效。

Objective To compare the efficacy of chemomechanical caries removal with that of conventional excavation in reducing the count of the cariogenic flora. Methods Thirty-two children with deciduous molar tooth caries were included in this study. Two primary teeth with comparable degrees of carious destruction were chosen in each child . Caries tissue was removed by using rotary instruments on one side, and Carisolv on the other side . Samples from carious dentine were taken with a sterile scraping instrument, then all softened dentine was removed and a second sample was taken. All samples were serially diluted and plated on two different nutrient agar plates. Results After 24爃ours of incubation, colony forming units were determined for total bacterial counts and lactobacilli. Both methods of caries removal produced a statistically significant reduction in the bacterial counts. But there was no significant difference between two methods. Conclusion These results indicate that the efficacy of chemomechanical removal of carious dentine in children by means of Carisolv is comparable to the results obtained by conventional methods.