A group ( Unitek adhesive was used as control group 3M ), groups B and C ( Self-etching primer + TransbondXT were used under dry and moist conditions 3M ) .
B组和C组作为实验组,分别在干性和湿性环境下应用Self-etchingprimer(自酸蚀封闭剂3M)+Transbond~(XT)(光固化粘接剂3M)粘接托槽。