4种树脂材料体外模拟恒磨牙Ⅴ类洞充填后边缘封闭效果比较  

Comparison of marginal closure effects among 4 kinds of resinmaterials in filling simulatedⅤ-type cavity of permanent malars in vitro

作　　者：赵梦明[1] 张鑫[1] 王菲菲 李睿[1] 刘大勇[1] 胡美林[1] 贾智[1] ZHAO Mengming;ZHANG Xin;WANG Feifei;LI Rui;LIU Dayong;HU Meilin;JIA Zhi(Department of Dental Endodontics,Stomatology Hospital,Tianjin Medical University,Tianjin 300070,China)

机构地区：[1]天津医科大学口腔医院牙体牙髓科,天津300070

出　　处：《吉林大学学报（医学版）》2020年第2期389-393,共5页Journal of Jilin University：Medicine Edition

基　　金：天津市科技局自然科学基金资助课题(18JCYBJC95500)。

摘　　要：目的:探讨新型自粘接流动树脂Constic与另外3种窝洞充填材料在恒磨牙体外实验中的边缘微渗漏情况,为临床Ⅴ类洞充填材料的选择提供参考。方法:收集新鲜离体恒前磨牙和第三磨牙各20颗,共40颗,颊面制备Ⅴ类洞,随机分为4组(n=10),分别采用Constic自粘接流动树脂(Constic组)、Dyad Flow自粘接流动树脂(Dyad Flow组)、Filtek Z350XT流动树脂(Filtek Z350XT组)和Z350XT纳米树脂(Z350XT组)进行充填。每组随机选择5颗样本进行冷热循环100次,另5颗样本循环500次。0.1%罗丹明B荧光溶液染色后制片,采用激光共聚焦显微镜观察微渗漏情况,对微渗漏程度进行评估,并检测微渗漏深度。结果:各组材料均出现不同程度的边缘微渗漏。同种材料充填后冷热循环100和500次时微渗漏级别比较差异无统计学意义(P>0.05)。与Constic组比较,Dyad Flow组、Filtek Z350XT组和Z350XT组口壁及龈壁微渗漏深度明显增加(P<0.05);Dyad Flow组和Filtek Z350XT组口壁及龈壁微渗漏深度均低于Z350XT组(P<0.05)。结论:自粘接流动树脂Constic微渗漏低,边缘密合度高,优于Dyad Flow、Filtek Z350XT和Z350XT。Objective:To investigate the marginal microleakage of the new self-adhesive flow resin Constic and other three cavity filling materials in the in vitro experiments of permanent molars,and to provide the references for the selection of clinicalⅤ-type cavity filling materials.Methods:A total of 40 fresh and extrated teeth including 20 premolars and 20 third molars were collected,and the V-type cavities were prepared on the buccal surface;the teeth were randomly divided into 4 groups(n=10),and the cavities were filled by self-adhesive flow resin Constic(Constic group),self-adhesive flow resin Dyad Flow(Dyad Flow group),flow resin Filtek Z350XT(Filtek Z350XT group)and Z350XT nano-resin(Z350 group).Five teeth were selected from each group and received cold and heat cycles for 100 times,and another five simples were used for 500 times.After thermal test,all teeth were stained with 0.1%Rhodamine-B solution.The microleakage was observed under confocal laser scanning microscope,the microleakage degree was evaluated,and the depth of microleakage was detected.Results:The marginal microleakage in different degrees was found in the materials in various groups.There was no significant difference in the microleak degree of the same meterial after 100 times and 500 times of cold and heat cycles(P>0.05).Compared with Constic group,the microleakage depths in the side of mouth and the side of gum in Dyad Flow group,Filtek Z350XT group and Z350XT group were increased(P<0.05);the microleakage depths in the side of mouth and the side of gum in Dyad Flow group and Filtek Z350XT group were lower than those in Z350XT group(P<0.05).Conclusion:Constic has low microleakage and high edge tightness and is more effective than Dyad Flow,Filtek Z350XT and Z350XT.

关 键 词：自粘接流动树脂 微渗漏 自酸蚀粘接 激光共聚焦显微镜 

分 类 号：R783.1[医药卫生—口腔医学]