摘要
目的:比较不同类型树脂充填近中面洞的颈壁牙本质-牙骨质边缘微渗漏。方法:在36个新鲜拔除的人上下颌恒磨牙制备近中面洞,随机分为3组,分别用3M后牙树脂P60、前后牙通用树脂Z250和纳米树脂Z350充填。标本经温度循环,品红染色后,近中远中向沿长轴连续切3片,体视显微镜下观察染料渗漏情况。结果:3组微渗漏由小到大依次为:Z350<Z250<P60,但3组之间无统计学差异(P>0.05)。结论:此3种树脂类型对近中面洞颈壁牙本质-牙骨质边缘微渗漏无明显差异。
AIM： To compare the gingival microleakage of class Ⅱ cavities using different types of resin composites when gingival margins were located on dentin cementum. METHODS： Class Ⅱ slot cavity was prepared on mesial surface in each of 36 freshly extracted human molars. Teeth were randomly divided into 3 groups and were filled with 3 types of resin composites respectively ： packable resin composite （ P60 ）, hybrid resin composite （ Z250 ） and nanofilled resin composite（Z350）. After thermocycling, all teeth were immersed in basic fuchsine solusion. Then each sample was sectioned longitudinally into 3 pieces in mesio - distal direction. Dye penetrations were examined under stereomicroscope. RESULTS ： No significant differences （ P 〉 0.05 ） of microleakage were found among the three resin composites. CONCLUSION： It could be concluded that the three types of resin composite in this study showed no difference on gingival microleakage of class Ⅱ cacites at margin of cementum and dentin.
出处
《牙体牙髓牙周病学杂志》
CAS
北大核心
2009年第4期215-217,共3页
Chinese Journal of Conservative Dentistry
关键词
复合树脂
近中殆面洞
微渗漏
composite resins
class Ⅱcavity
microleakage
