【摘要】 目的:本研究只对金属托槽、树脂托槽分别应用3种不同粘接剂粘接,正畸托槽去除时粘接剂残留的模式进行体外研究。方法:收集因正畸需要而拔除的新鲜双尖牙120颗,随机等分为6组,用国产双尖牙方丝弓树脂托槽和国产方丝弓金属托槽分别应用3种不同粘接剂模拟临床应用的实验条件下粘接,并做组别标记,1KN电液疲劳实验机进行托槽去除。在实体显微镜下观察ARI记分情况,对正畸托槽去除时粘接剂残留模式进行体外研究。结果:树脂托槽组中和金属托槽组中3组粘接剂去粘接后,ARI记分均无显著性差异(P>0.05),但同种粘接剂金属托槽与树脂托槽ARI记分有显著性差异(P<0.05)。结论:去粘接时金属托槽留在牙面的粘接剂少,树脂托槽留在牙面的粘接剂多。说明树脂托槽与粘接剂之间的粘接强度有待进一步加强。更多还原

【Abstract】 Objective:In case of three different adhesives respectively used for metal brackets and resin brackets,the paper conducted in-vitro research on adhesive remnant mode when debonding orthdontic brackets.Methods:We selected one hundred and twenty human premolars without caries and extracted for orthodontic reasons.They were divide to six groups randomly.(n=20).The Edgewise resin brackets and Edgewise metal brackets were respectively bonded with three different adhesives.After thermocycling,the hydroplus testing machine(shimadzu corporation,Japan) was used to debond orthdontic brackets.And all teeth were examined under an optical stereomicroscope.The amount of residual adhesive was classified according to the adhesive remnant index(ARI).Results:Significant difference(P<0.05) was found between the metal bracket group and the resin bracket group.However,no significant difference(P>0.05) was found amomg the metal bracket groups or among the resin bracket groups.Conclusion:Resin brackets left more adhesive on the tooth after debonding than the metal brackets.The adhesion between resin bracket and adhesive need to be enhanced.更多还原