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Improvement of Dentin Cavity Adaptation of Visible Light Activated resin Composite.

可见光激活复合树脂对牙本质腔适应性的改进。

基本信息

批准号：
01571053
负责人：
ITOH Kazuo
金额：
$ 1.34万
依托单位：
Showa University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

项目摘要

In order to obtain the marginal integrity of the dental composite to the dentin cavity wall is determined by the efficacy of the dentin bonding system which are composed of the dentin cleanser, dentin primer and the dentin bonding agent. And the primary requirement for the dentin bonding system is to overcome the polymerization contraction stress of the composite. In spite of the remarkable development of the dentin dentin adhesives, the optimum combination of the dentin bonding system has not been established. We have already reported that the degree of the decalcification beneath the smear layer by the dentin cleanser correlated with the increase of the contraction gap width. In the next stage, we defined that the glutaraldehyde in the commercial dentin primer was possible to be eliminated if it was followed by the highly effective dentin bonding agent. Therefore, it was concluded that the 35% hydroxyethyl methacrylate was practiced in clinic and it was marketed by a Japanese dental … More manufacturer. However, we have claimed that HEMA solution was effective not only on the improvement of the bonding efficacy but also the sedation of the hypersensitivity of the dentin although it caused the contact dermatitis on the finger tip of the operator after frequent contact with the dentin primer. The purpose of the present investigation is to develop the dentin primer which prevent the contraction gap formation completely and never cause the side effect on the soft tissue. In this couple of years, we reported two monomers, glyceryl methacrylate and erythritol methacrylate, by which the gap formation was prevented completely. More effort is still required to examine the possible by these two monomers. In the steps of the dentin bonding agent application and the resin composite filling, the details of the bonding mechanism has not been defined completely. In our examination of the bonding efficacy of various commercial products, four commercial dentin bonding agents was effective to improve the marginal adaptation of the composite although the mechanical property of the composite which directly correlate with the marginal integrity was not defined. Less

为了获得牙科复合材料对牙本质腔壁的边缘完整性，由牙本质清洁剂、牙本质底漆和牙本质粘结剂组成的牙本质粘结系统的效力决定。而对牙本质粘接系统的首要要求是克服复合材料的聚合收缩应力。尽管牙本质粘接剂有了显著的发展，但牙本质粘接系统的最佳组合尚未确定。我们已经报道了牙本质清洁剂对玷污层下脱钙的程度与收缩间隙宽度的增加相关。在下一阶段，我们确定，如果使用高效的牙本质粘结剂，则可以消除市售牙本质底漆中的戊二醛。因此，认为35%甲基丙烯酸羟乙酯已在临床上得到应用，并已由日本牙科公司上市 ...更多信息制造商然而，我们已经声称，HEMA溶液不仅对改善粘结效果有效，而且对牙本质过敏症的镇静也有效，尽管它在频繁接触牙本质底漆后引起操作者指尖上的接触性皮炎。本研究的目的是研制一种能完全防止收缩间隙形成且对软组织无副作用的牙本质底漆。在这几年中，我们报道了两种单体，甲基丙烯酸甘油酯和甲基丙烯酸异丁酯，通过它们可以完全防止差距的形成。还需要更多的努力来研究这两种单体的可能性。在牙本质粘结剂的应用和树脂复合物的填充步骤中，粘结机理的细节尚未完全确定。在我们对各种商业产品的粘结效果的检查中，四种商业牙本质粘结剂有效地改善了复合材料的边缘适应性，尽管没有定义与边缘完整性直接相关的复合材料的机械性能。少