摘要
目的:分析牙科双组分陶瓷偶联剂混合后的反应机制及其对瓷和树脂粘结强度的影响。方法:采用傅立叶变换红外光谱原位动态快速扫描技术对牙科双组分陶瓷偶联剂混合液进行了为期180min的观察,结合剪切粘结强度测试,分析偶联剂双组分混合后不同时间对瓷和树脂粘结强度的影响。结果:双组分偶联剂混合后,γ-l甲基丙烯酰氧丙基三甲氧基硅烷(γ-MPS)分子迅速发生水解形成硅醇,同时部分水解产物发生缩合;混合52min时,硅醇单体浓度达到最高,之后缓慢下降;混合后77min时,γ-MPS分子基本水解完全。但混合后180min内,偶联剂放置不同时间对瓷和树脂的粘结强度没有显著影响(P>0.05)。结论:双组分陶瓷偶联剂混合后发生了一系列水解和缩合反应,但在混合180min内均可供临床使用。
Objective To analyze the hydrolysis and condensation reactions of a two-mix dental porcelain primer and their effect on porcelain-resin bonding. Methods A two-mix dental porcelain primer was mixed and subjected to Fourier transform infrared spectroscopy dynamic analysis in 180min. The shear bond strengths between composite resin and porcelain treated with mixed porcelain primers in different time were also tested. Results The γ-MPS molecules began to hydrolyze into triols immediately after mixing, as the same time silane triols can condense with each other to form polymers. At 52min after mixing, the concentration of silane triols reached the peak value. Complete hydrolysis of the γ-MPS occurred at 77min after mixing. But the shear bond strength between resin and porcelain treated with mixed silane primers in different time were comparable. Conclusion There are a series of hydrolysis and condensation reactions after mixing the two-mix dental porcelain primer. The mixed solution can be used for clinic in at least 180min.
出处
《中国美容医学》
CAS
2006年第11期1296-1299,共4页
Chinese Journal of Aesthetic Medicine
作者简介
通讯作者：陈吉华，西安市长乐西路145号第四军医大学口腔医学院修复科，710032；Email：jhchen@fmmu．edu．cn
