三种水门汀粘接纵裂磨牙封闭效果的体外研究  

The vitro research on the bonded sealing in vertically fractured molars using three cements

作　　者：刘琨[1] 潘涛[1] 杨鹏[1] 姚丽霞[1] 马洪学[1] 张惠民[1] 

机构地区：[1]山东省聊城市人民医院口腔科,主治医师山东252000

出　　处：《口腔颌面修复学杂志》2013年第2期98-102,共5页Chinese Journal of Prosthodontics

基　　金：2012年聊城市科学技术攻关计划课题

摘　　要：目的:评价纵裂磨牙应用3种水门汀进行粘接内固定的实验效果,并观察裂隙内的微渗漏情况。方法:选用人离体磨牙60颗,随机分为新鲜纵裂组和陈旧纵裂组,分别为裂隙密合和面裂隙保持2mm间隙。后将两组牙齿分别以玻璃离子、自粘接树脂水门汀Unicem和超级粘接剂粘接纵裂的裂隙(n=10),待材料凝固后行全冠牙体预备,观察预备体是否会复裂,并以树脂冠修复。全部试件置入37℃生理盐水中7d,并4℃-55℃冷热循环500次后,放置于0.5%的品红溶液中染色7d,观察裂隙封闭程度并在根管显微镜下观察微渗漏情况,采用SPSS 17.0软件包对数据进行统计学处理。结果:新鲜纵裂组中,牙体预备后均未复裂,超级粘接剂能完全封闭裂隙,Unicem和玻璃离子均不能渗入裂隙,染料渗入长度分别为(1.28±0.43)mm、(2.36±0.35)mm和(3.64±0.95)mm,三组间差异有统计学意义(P<0.05);陈旧纵裂组中,牙体预备后均未复裂,超级粘接剂能完全封闭裂隙,Unicem和玻璃离子均不能渗入到根尖,染料渗入长度分别为(2.15±0.40)mm、(3.13±0.81)mm和(3.85±0.70)mm,三组间差异有有统计学意义(P<0.05)。结论:相对于玻璃离子和树脂水门汀Unicem,超级粘接剂在粘接固定纵裂磨牙时的流动渗入能力较好,边缘微渗漏较少。Objective： To evaluate the effectiveness of the sealing ability of 3 cements used on vertically fractured mo- lars in vitro, and to observe the microleakage of the different cements and dentin. Methods： Sixty human molars were ran- domly divided into two groups： freshly vertically fractured group with closed crack and dated vertically fractured group with 2mm crack on occlusal surfaces. Then, the models were bonded with glass ionomer cement, Unicem or Super-Bond C＆B （n=10）. After concretion of 3 cements, the teeth were prepared for full-crown. Resin crowns were fabricated and bonded with glass ionomer cement on teeth. After immersed in water at 37% for 7 days, specimens were subjected to 500 thermocy- cling ranging between 4℃ and 55℃. Then, they were placed into a 0.5% basic fuchsin dye for 7d. After soaking, fissure sealing degree and microleakage depth were observed using dental microscope. All statistical analysis was performed using SPSS 17.0 software package. Results： In the freshly vertically fi＇actured group, Super-Bond C＆B was effective in the seal- ing of the crack, while glass ionomer cement and Unicem could not seal the crack. The mean dye penetration length of models werel.28±0.43mm, 2.36± 0.35mm and 3.64±0.95mm, respectively. And there were significant differences among 3 cements（P〈 0.05）. In the dated vertically fractured group, Super-Bond C＆B was effective in the sealing of the root, glass ionomer cement and Unicem could not seal root completely. The mean dye penetration length of models were 2.15±0.40mm,3.13± 0.81 mm and 3.85±0.70mm, respectively. And there were significant differences among 3 cements（P〈0.05）. Conclusions： This study showed that Super-Bond C＆B used as bonded sealing material for vertically fractured teeth was better than glass ionomer cement and Unicem in the microleakage and fluidity.

关 键 词：磨牙纵裂 粘接内固定 水门汀 微渗漏 

分 类 号：R783[医药卫生—口腔医学]