摘要
目的改良试制三丙烯酸三羟甲基丙酯(TMPT)添加型即刻牙本质封闭剂,并进行牙本质粘结性能的研究。方法采用不同的TMPT、丙烯酸酯(Ac)添加比例,将"劲润"牙本质保护膜(Hybrid Coat,HyC)中的Ac取代;用600目砂纸打磨暴露牛牙牙本质后作为被着体样本,测试添加TMPT后的牙本质封闭剂的牙本质剪切粘结强度,用实体显微镜观察粘结界面断裂模式。结果 67%Ac～33%TMPT比例的试制牙本质封闭剂显示了最大牙本质粘结剪切力,约14.50MPa,界面断裂模式以凝集破坏为主;0%Ac～100%TMPT比例的试制牙本质封闭剂显示了较低粘结力,断裂模式主要为界面破坏。结论 HyC中添加33%TMPT改良试制牙本质封闭剂可以提高其牙本质剪切粘结强度,使其在发挥活髓基牙抗过敏疗效的同时,可为最终修复体的成功粘结提供保障。
Objective To investigate the shear bond strength of trial immediate dentin sealing materials to dentin that contained TMPT in commercially available Hybrid Coat（HyC）.Methods Trial dentin sealing materials were prepared by changing the combination proportion of Ac and TMPT in HyC,and then used on bovine teeth to test the shear bond strength to dentin.Results Shear bond strength was the highest when a trial dentin sealing material of 67% Ac-33% TMPT was used,which was about 14.50MPa,and failure modes of most specimens were cohesive failure.Bond strength was the lowest when the combination proportion was 0% Ac-100% TMPT.Conclusion The dentin bond strength could be enhanced when 33% TMPT was added to HyC,which would ensure bond strength of final restorations and relieve dentin hypersensitivity of the vital teeth prepared for crowns.
出处
《西安交通大学学报（医学版）》
CAS
CSCD
北大核心
2013年第4期441-444,共4页
Journal of Xi’an Jiaotong University（Medical Sciences）
