液体抛光剂和护牙素预防托槽周围釉质脱矿效果的体外研究

目的 对比研究BISCOVER LV液体抛光剂和Tooth Mousse护牙素对托槽周围牙釉质脱矿后促进其再矿化的效果.方法 将60颗离体牙粘接托槽后随机分为3组,分别涂上液体抛光剂、护牙素以及蒸馏水,将离体牙轮流放置于人工唾液和人工致龋液中浸泡,模拟患者进食的状态,90 d后使用显微硬度仪以及扫描电镜检测托槽周围牙釉质表面硬度以及形态的变化.结果 3组牙釉质脱矿后的显微硬度值差异具有统计学意义(F=507.50,P<0.05),两两比较结果显示:实验组和阳性对照组牙釉质显微硬度值之间差异无统计学意义(P>0.05);而实验组牙釉质显微硬度值高于阴性对照组,以及阳性对照组牙釉质显微硬度值高于阴性对照组,且差异均有统计学意义(P<0.05).扫描电镜显示实验组牙釉质超微结构表面反应物沉积增多,空隙变小,牙釉质再矿化现象明显.结论 在正畸治疗中使用BISCOVER LV液体抛光剂和Tooth Mousse护牙素均可有效防止托槽周围牙釉质脱矿,两者在临床上的使用可视患者的配合程度而定.

An in vitro study of the efficacy of tooth liquid polish sealant and Tooth Mousse in prevention of enamel demin-eralization around the bracket during orthodontic treatment

Objective To observe the efficacy of BISCOVER LV tooth liquid polish sealant and Tooth Mousse Den-tal protective agent on mineralization around the orthodontic brackets during orthodontic treatment. Methods 60 teeth with bonded orthodontic brackets were randomly divided into three groups, experimental group, positive control group and negative control group, they were applied separately with tooth liquid polish sealant, Tooth Mousse and distilled wa-ter. 3 groups were dipped into an artificial caries solution and an artificial saliva solution, cycling between them. 90 days later,the changes of enamel surface around the brackets of all samples were detected by microhardness tester and scan-ning electron microscope. Results One-way ANOVA was used for statistical analyses, there was significant difference of the microhardness of acid etched enamel surface among the three groups (P < 0.05). Through the LSD-t test, there was no significant difference of the microhardness of acid etched enamel surface between experimental group and posi-tive control group (P>0.05), and there were significant differences of the microhardness of acid etched enamel surface in another two comparisons within the three groups (P<0.05). A large number of deposits were found through scanning electron microscope on the dental enamel surface of the experimental group, which could make a better remineralization. Conclusion Both BISCOVER LV tooth liquid polish sealant and Tooth Mousse Dental protective agent can effectively prevent tooth enamel from demineralization around the bracket during orthodontic treatment, doctors can choose them in accordance with the compliance of the patient.