不同牙体修复材料与Ⅱ类洞龈壁适合性的显微CT观察  

Micro-CT observations of the adaptation at gingival wall in Class Ⅱ restorations with different dental restorative materials

作　　者：聂杰[1] 王晓燕[1] 高学军[1] 

机构地区：[1]北京大学口腔医学院.口腔医院牙体牙髓科,北京100081

出　　处：《北京大学学报（医学版）》2015年第2期317-320,共4页Journal of Peking University:Health Sciences

基　　金：北京市科学技术委员会科技计划项目(Z141100000514016)资助~~

摘　　要：目的:使用显微CT观察不同牙体修复材料用于Ⅱ类洞充填修复时材料与龈壁的适合性。方法:选择人离体前磨牙18颗,制备邻牙合面Ⅱ类洞,随机分为6组进行分层充填。使用6种材料作为龈壁层材料,包括4种注射式充填材料:Beautifil Flow Plus F00(F00)、Beautifil Flow F10(F10)、Filtek Z350 Flowable(Z350F)和FujiⅡLC CAPSULE(Fuji),以及2种膏体状填压式充填材料:BeautifilⅡ(BF)和Filtek Z350(Z350)。将充填修复后离体牙进行显微CT扫描和三维重建,分析龈壁层充填体-牙齿界面孔隙体积和分布。孔隙体积采用Jonckheere-Terpstra非参检验方法进行统计分析。结果:龈壁层充填体-牙齿界面孔隙体积(mm3)由小到大依次为:Z350F(0.000 15)、F10(0.000 39)、F00(0.012)、Fuji(0.070)、Z350(0.16)和BF(0.20),Z350F/F10组与Fuji/Z350/BF组差异具有统计学意义(P<0.05)。孔隙分布结果显示,绝大多数孔隙位于窝洞的点线角。结论:龈壁层充填体-牙齿界面孔隙主要位于窝洞点线角,高流动注射式充填材料可以有效减少界面孔隙的产生。Objective： To evaluate the adaptation of different materials for gingival layer in Class Ⅱrestorations using Micro-CT.Methods：Eighteen extracted human premolars were selected, and ClassⅡcavities were prepared.The teeth were randomly divided into six groups and restored using layering tech-nique.Six materials were used for gingival layer, including four injectable materials：Beautifil Flow Plus F00 （F00）, Beautifil Flow F10 （F10）, Filtek Z350 Flowable （Z350F）, FujiⅡLC CAPSULE （Fuji）, and two packable materials： BeautifilⅡ （BF）, Filtek Z350 （Z350）.The restored teeth were scanned with micro-CT and the images were 3D reconstructed to evaluate the volumes and the distribution of the voids on the restoration-tooth interface of the gingival layer.The volume of the voids were statistically analyzed using nonparametric Jonckheere-Terpstra tests.Results： The volumes （ mm3 ） of the voids on the restoration-tooth interface were： Z350F （0.000 15）, F10 （0.000 39）, F00 （0.012）, Fuji （0.070）, Z350 （0.16） and BF （0.20）.There were significant differences between Z350F/F10 and Fuji/Z350/BF （P〈0.05）.Most of the voids were found on the point-line angles of the cavities.Con-clusion：The voids on the restoration-tooth interface were mainly on the point-line angles of the cavities. Injectable materials with high flowablility could reduce the restoration-tooth interface voids significantly when used for the gingival layer in ClassⅡrestorations.

关 键 词：牙科材料 牙修复体 牙洞 龈壁层 X射线显微断层成像 

分 类 号：R783.3[医药卫生—口腔医学]