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Molecular Spectroscopic Study on Adhesion Mechanism between Tooth Substrate and Adhesive Resins by Laser Raman Technique.

激光拉曼技术对牙基与粘接树脂粘接机理的分子光谱研究。

基本信息

批准号：
03455022
负责人：
SUZUKI Masako
金额：
$ 3.46万
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 (B)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1993
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-03455022/
关键词：
Raman Spectroscopy Micro Analysis Dentin Enamel Dental Adhesive Monomer Resin Infiltrated Dentin Calcium Salt Infrared Reflection Absorption Spectrum 歯質接着性レジン 4-MET MIOPS 高感度反射赤外分光法単分子膜ハイドロキシアパタイト化学吸着歯質浸透性モノマー 4ーMET 歯

项目摘要

Advanced Raman and IR spectroscopic study were undertaken to obtain the molecular level informations about adhesive resins to enamel, dentin or metal in dental clinical use. The results are as follows :<Micro-analysis on the interface between dental adhesive resin (4-MET/MMA-TBB) and human dentin by Raman spectroscopy>Resin monomer was detected until 6mum below the surface in dentin side. This is the first spectroscopic evidence of resin-infiltrated dentin layr which was reported by SEM observation. It was also found that the functional monomer 4-MET was highly condensed in the layr.<The contribution of chemical interaction between dental adhesive resin and tooth substrate>Raman spectra of mixture of 4-MET and hydroxyapatite was investigated in detail and calcium salt of 4-MET was detected. However it was shown to be difficult that a 4-MET molecule is attached to HAP by forming Ca salt at the carboxyl group and is simultaneously linked to resin by forming a copolymer with MMA (base monomer) at the methacryl group. Calcium salt was also detected on the adhesive interface between resin and enamel or dentin.<Adsorption structure of metal adhesive primer to precious metal>M10P and M10PS were adorbed on silver or gold substrate by self-assembly method or spin-coated method from MMA solution and the infrared reflection absorption spectra were mea-sured. It was found that both monomers are adsorbed on the precious metals at their phos-phate groups, which are in the ionized form, -O-PO_3^<2->.On gold substrate, the monomers seem to be adsorbed differently.

采用先进的拉曼光谱和红外光谱研究方法，获得临床应用于牙釉质、牙本质或金属的粘接树脂的分子水平信息。结果表明：用拉曼光谱对牙黏剂树脂（4-MET/MMA-TBB）与人牙本质界面的微观分析>在牙本质侧表面以下6mum处检测到树脂单体。这是用扫描电镜观察首次报道的树脂渗透牙本质层的光谱证据。还发现功能单体4-MET在层中高度凝聚。研究了4-MET与羟基磷灰石混合物的拉曼光谱，并检测了4-MET的钙盐含量。然而，4-MET分子很难通过在羧基上形成Ca盐与HAP结合，同时在甲基丙烯酸基上与MMA（碱单体）形成共聚物与树脂结合。树脂与牙本质或牙釉质的粘接界面上也检测到钙盐。从MMA溶液中采用自组装法或旋涂法将金属胶粘剂底漆对贵金属>M10P和M10PS的吸附结构吸附在银或金衬底上，并测量其红外反射吸收光谱。发现这两种单体都吸附在贵金属的磷酸基上，其电离形式为- o - po_3 ^<2->。在金底物上，单体的吸附似乎有所不同。