摘要
目的研究3种不同类型钻针牙体预备对自酸蚀牙本质粘接强度的影响。方法选用新鲜拔除的人第三磨牙,去除面釉质及浅层牙本质,暴露中层牙本质,制得牙本质平面试件。采用随机数字表法将试件分为3组,分别使用牙体预备用金刚砂钻针、磨光用金刚砂钻针和牙体预备用钨钢钻针进行牙本质表面预备,3种钻针的形态、直径和尖端设计相同。分别使用自酸蚀树脂粘接水门汀和自粘接树脂粘接水门汀进行粘接,测量牙本质粘接强度,观察其断裂模式。结果钨钢钻针组牙本质粘接强度(13.06±1.35MPa)最高,两种金刚砂钻针组之间牙本质粘接强度比较,差异无统计学意义(P>0.05)。结论两种金刚砂钻针比较,钨钢钻针预备的牙本质表面与自酸蚀类树脂粘接水门汀的粘接强度更高。
Objective To explore the effect of three different types of dental rotary instruments on the immediate bonding strength and the aging adhesive strength of dentin.Methods Freshly extracted human third molars with complete dentin crowns were selected by inclusion criteria in this study.The occlusal enamel was removed to expose the surface of middle dentin.The teeth were assigned to three groups according to random number table method:preparation-diamond group,finishing-diamond group and preparation-carbide group.The three rotary burs chosen for the tooth preparations have similar configurations in terms of taper,diameter,and tip shape.The operator prepared the dentin surfaces,and then cement the self-etching resin adhesive cement and the self-adhesive resin cement with the prepared dentin surface respectively,measure the adhesive strength,and observe the fracture mode.Results The bonding strength(13.06±1.35MPa)was the highest in the group of the preparation-carbide group.There was no statistically significant difference between the dentin bonding strength between the preparation-diamond group and the finishing-diamond group(P>0.05).ConclusionCompared with the two kinds of diamond burs,the dentin surface prepared by the carbide burs has higher adhesive strength with self-etching resin cements.
作者
张玉玮
王文洁
栗智
李冬雪
伍小臻
ZHANG Yuwei;WANG Wenjie;LI Zhi(Department of Stomatology,Aerospace Center Hospital,Beijing 100049,China)
出处
《医学研究杂志》
2023年第1期125-129,共5页
Journal of Medical Research
基金
航天中心医院青年创新基金资助项目(2022QN05)。
