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我们进行了系列研究,除扫描电镜观察,还用最新型60SXR—FTIR付里叶变换红外光谱分析技术,结合X射线光电子能谱来研究常用四类粘接剂,与牙釉质、牙本质间相互作用,探索粘接机理。得出较完整的初步结沦。 扫描电镜观察到四类粘接剂,除Cluma Dentin Bond未能渗入处理牙本质外,其它的均能渗入至处理牙釉质,牙本质中,形成树脂突,产生机械嵌合力。此结果表明,经处理牙釉质、牙本质,大大增加了粘接有效表面积,可湿性增加,接触角9减少,有利粘接剂的渗透,与牙齿嵌合,产生机械嵌合力。 红外光谱证实依据差谱图,粘接剂和牙釉质、牙本质彼此间存有作用,此作用是与OH、NH、C=O及含有O的基团有关。根据广泛酸碱理论,OH、NH属酸性基团,含O基团是碱性。粘接剂上C=O,C-O-C,P=O,P-O,OH都含有O基团,而牙釉质,牙本质中羟基磷酸钙、胶原上有Ca~(++)、OH、NH基团,这些基团相遇产生酸碱缔合作用,带有孤对电子O与OH、NH的H形成氢键,与Ca~(++)形成配合位键,它反映在红外光谱的差谱图上,是谱带发生相应的变化。 X射线光电子能谱检测也证实牙釉质、牙本质的P、Ca、N的结合能力,在与粘接剂粘接后都有明显降
We conducted a series of studies, in addition to scanning electron microscopy, but also with the latest 60SXR-FTIR Fourier transform infrared spectroscopy techniques, combined with X-ray photoelectron spectroscopy to study four commonly used adhesives, and enamel, dentin between Role, to explore the bonding mechanism. Come to a more complete preliminary conclusion. Four types of adhesives were observed by scanning electron microscopy. Except that Cluma Dentin Bond failed to infiltrate the dentin, all the others could penetrate into the enamel and dentin and form resinous protrusions, resulting in mechanical chimerism. This result shows that treated enamel and dentin greatly increase the effective surface area of adhesion, increase wettability, reduce contact angle 9, facilitate the penetration of adhesive, engage with teeth, and generate mechanical chimerism. Infrared spectroscopy confirmed that the differential spectroscopy, adhesive and enamel, dentin play a role in each other, this role is with OH, NH, C = O and O-containing groups. According to the extensive acid-base theory, OH, NH are acidic groups and the O-containing groups are basic. C = O, COC, P = O, PO and OH all contain O groups on the adhesive, while the calcium enophthalocyanine and calcium hydroxyphosphate in dentin have Ca ~ (++), OH and NH groups on the collagen, These groups meet to produce acid-base association, with lone pair of electrons O and OH, NH of H hydrogen bond, and Ca ~ (++) form a coordination bond, which is reflected in the difference spectrum infrared spectra, Is the corresponding changes in the band. X-ray photoelectron spectroscopy also confirmed that the bonding ability of enamel and dentin with P, Ca, N were significantly decreased after bonding with adhesive