充填厚度对光固化大块复合树脂充填效果的影响  

Effect of the thicknesses of bulk-fill composites on bonding strength

作　　者：王莹 杨家雪 谢海峰[2] 陈晨[1] Wang Ying;Yang Jiaxue;Xie Haifeng;Chen Chen(Dept.of Endodontics,Affiliated Hospital of Stomatology,Nanjing Medical University,Jiangsu Province Key Laboratory of Oral Diseases,Jiangsu Province Engineering Research Center of Stomatology,Nanjing 210029,China;Dept.of Prosthodontics,Affiliated Hospital of Stomatology,Nanjing Medical University,Jiangsu Province Key Laboratory of Oral Diseases,Jiangsu Province Engineering Research Center of Stomatology,Nanjing 210029,China)

机构地区：[1]南京医科大学附属口腔医院牙体牙髓科江苏省口腔疾病研究重点实验室江苏省口腔转化医学工程研究中心,南京210029 [2]南京医科大学附属口腔医院口腔修复科江苏省口腔疾病研究重点实验室江苏省口腔转化医学工程研究中心,南京210029

出　　处：《华西口腔医学杂志》2022年第2期169-174,共6页West China Journal of Stomatology

基　　金：国家自然科学基金(81970927);江苏省自然科学基金(BK20191348);江苏省高校“青蓝工程”项目(2019);江苏高校优势学科建设工程资助项目(2018-87)。

摘　　要：目的研究充填厚度对大块复合树脂充填效果的影响。方法2种大块充填树脂Filtek Bulk Fill Posterior(FBF)和Tetric N-Ceram Bulk Fill(TBF)为实验组,2种传统光固化复合树脂Filtek Z100(Z100)和Spectrum TPH(ST)为对照,测试不同固化厚度下树脂的透明度、颜色稳定性、表面维氏硬度和微拉伸粘接强度。结果4种树脂透明度、硬度随厚度增加而降低。同一厚度下,大块树脂透明度高于传统树脂,硬度为Z100>FBF>TBF>ST(上表面硬度除外)。除FBF 3 mm和4 mm组老化后颜色参数发生显著变化外,其他各组均未发生明显变化。4种树脂一次性充填4 mm的微拉伸粘接强度均较分层充填低,但大块充填树脂一次性充填4 mm的微拉伸粘接强度仍可达到30 MPa。结论大块充填树脂采用一次充填技术能满足临床要求,但个别品牌可能出现远期颜色不稳定。Objective This work evaluated the effects of thickness on resin bonding strength.Methods We set the two bulk-fill composites Filtek Bulk Fill Posterior(FBF)and Tetric N-Ceram Bulk Fill(TBF)as the experimental groups and the two conventional composites Filtek Z100(Z100)and Spectrum TPH(ST)as the control groups.The translucency parameter(TP),color difference,Vickers hardness(HV),and microtensile bond strength(μTBS)of dentine and the resin composites were measured at different depths.Results In each group,TP and HV decreased with the increase in thickness.At the same depth,the TP of the bulk-fill composites was higher than that of the conventional composites.At the same depth,the HV of the four different resin composites followed the order of Z100>FBF>TBF>ST(except for the upper surface).Except for FBF at 3 and 4 mm,all of the other groups showed no visible color change at all the tested thicknesses.Although theμTBS values of the four different composites obtained through the bulk-fill technique were lower than those of composites obtained through the incremental fill technique,theμTBS of the bulk-fill composites obtained through the bulk-filling technique can reach 30 MPa.Conclusion Bulk-fill composites applied in single 4 mm increments can meet the requirements of clinical application.However,the color stability of some bulk-fill composites cannot be maintained.

关 键 词：大块充填树脂 粘接 厚度 透明度 维氏硬度 微拉伸粘接强度 

分 类 号：R783.1[医药卫生—口腔医学]