酪蛋白磷酸多肽-无定形磷酸钙复合物对窝沟封闭剂耐久性的影响

目的：评价酪蛋白磷酸多肽-无定形磷酸钙复合物（CPP-ACP）对窝沟封闭剂粘结系统耐久性的影响.方法：选取第三磨牙28颗,用低速涡轮钻沿颊舌向劈开,随机分为2实验组、2对照组.实验组经CPP-ACP处理后再分别用传统酸蚀系统和自酸蚀粘结系统进行窝沟封闭.对照组清水处理再分别进行两种方法的封闭.分别测定37℃水浴保存24 h和30 d的剪切黏结强度（SBS）,并用扫面电镜（SEM）观察断裂面形态.结果：实验组剪切粘结强度明显大于对照组（P＞1）,SEM结果显示全酸蚀实验组多为内聚破坏.结论：使用CPP-ACP可以提高窝沟封闭剂的粘结耐久性.

Effect of the application of a casein phosphopetide-amorphous calcium phosphate on bond durability of the pit and fissure sealant on durability

Objective： To evaluate the effect of the previous application of a casein phosphopeptide-amorphous calci- um phosphate paste on fissure sealants durability of adhesive systemsand adhesive systems on the bond durability of a fissure sealant. Method： 28 third molars were used and along with a low-speed turbine drill buccolingual split.Randomly divided in- to two experimental groups, two control groups. The experimental group treated by the CPP-ACP and then with conventional etching system and self-etching adhesive systems sealant. Water treatment control group, two methods then sealant.Then they kept in 37 ~C distilled water bath to measure the shear bond strengths （SBS）of 24 b and 1 month, and to determine the fail- ure modes by scanning electronic microscopy. Result： Shear bond strength of the experimental group was significantly higher than the control group （P 〉1）, SEM results showed that the experimental group of conventional etching group is mostly cohe- sive failure. Conclusion： Applying a CPP-ACP containing paste on enamel before adhesive systems was an effective method to increase bond durability of the sealant tested.