【摘要】 目的:通过观察封闭剂的渗透性和密合性,进一步探讨窝沟釉质成形封闭术的作用机制。方法:取离体牙60颗,分为A、B、C3个组,A、B两组分别用窝沟釉质成形封闭术(enameloplastysealanttechnique,EST)和窝沟杯刷清洗封闭术(cup-shapedbrushsealanttechnique,CST),C组作为对照组,进行酸蚀、隔湿干燥后涂封闭剂光照。采用染料浸染法和体视镜观察封闭剂的渗入程度以及与牙面间的密合程度。结果:EST组封闭剂渗入程度为(83·75±13·11)%,CST组为(55·30±11·98)%。封闭剂与牙尖斜面间缺陷出现率EST和CST分别为7·32%和19·51%;封闭剂与窝沟侧壁间缺陷出现率分别为16·7%和38·93%。结论:EST比CST具有较好的渗透性和密合性。更多还原

【Abstract】 Objective:To study the mechanism of enameloplasty by observing penetration and adaptation of sealant.Methods:60 extracted molors were selected and divided into three groups: pits and fissures of the samples in group A were prepared with bur(EST); those in group B were cleaned with cup-shaped brush(CST); group C as control.Results:The penetration of EST was (83.75±13.11)% and CST was (55.30±11.98)%. The presence of defects between sealants and inclines of cusp of EST and CST were 7.32% and 19.05% respectively, and between sealants and lateral walls of fissures were 16.07% and 38.93%.Conclusion:The penetration and adaptation of EST was superior to CST.更多还原