体外研究单体从粘结树脂-树脂复合体组合中通过牙本质的扩散情况。

Diffusion of monomers from bonding resin-resin composite combinations through dentine in vitro.

作者信息

Gerzina T M, Hume W R

机构信息

University of Sydney, Australia.

出版信息

J Dent. 1996 Jan-Mar;24(1-2):125-8. doi: 10.1016/0300-5712(95)00036-4.

DOI:10.1016/0300-5712(95)00036-4

PMID:8636483

Abstract

OBJECTIVES

Previous work has demonstrated diffusion of the monomer triethylene glycol dimethacrylate (TEGDMA) from resin composite through dentine in vitro. The objective of the present work was to examine monomer diffusion from bonding resins and resin composites used in combination.

METHODS

Occlusal cavities were prepared in tooth crowns and restored with bonding resin-resin composite combinations. Aqueous samples from the 'pulpal chamber' of each tooth were removed at timed intervals for analysis by reversed phase-high performance liquid chromatography and mass spectrometry.

RESULTS

Bonding resins contributed to monomer diffusion. A TEDGMA-containing bonding resin used in combination with a TEGDMA-containing resin composite hastened and increased TEGDMA diffusion through dentine. A 2-hydroxyethyl methacrylate (HEMA)-containing bonding resin used in combination with a TEGDMA-containing resin composite reduced TEGDMA diffusion only slightly compared with the resin composite alone and added substantial diffusion of HEMA.

CONCLUSION

The bonding resins tested contributed to monomer passage to the pulp space and did not prevent movement of monomer from resin composites to the pulp.

摘要

目的

先前的研究已证实在体外单体双甲基丙烯酸三乙二醇酯（TEGDMA）可从树脂复合材料中通过牙本质扩散。本研究的目的是检测联合使用的粘结树脂和树脂复合材料中单体的扩散情况。

方法

在牙冠制备咬合面洞型，并用粘结树脂 - 树脂复合材料联合修复。每隔一定时间从每颗牙齿的“髓腔”中采集水样，通过反相高效液相色谱和质谱进行分析。

结果

粘结树脂会促进单体扩散。含TEGDMA的粘结树脂与含TEGDMA的树脂复合材料联合使用时，会加速并增加TEGDMA通过牙本质的扩散。含甲基丙烯酸2 - 羟乙酯（HEMA）的粘结树脂与含TEGDMA的树脂复合材料联合使用时，与单独使用树脂复合材料相比，仅略微降低了TEGDMA的扩散，并增加了大量HEMA的扩散。