【摘要】 用固体荧光分别测得牙本质、牙釉质的荧光光谱。以具荧光性和具理论上可与钙离子化合的自制粘结性偶联剂(用作荧光探针)处理牙面后,测得固体荧光峰位发生明显红移。结果证明,偶联剂与牙体组织之间发生了化学结合而产生了新态。又根据溶液中偶联剂与钙离子作用后的荧光峰位红移的现象及测得络合比为2:1,推论偶联剂与牙面钙发生了螯合作用。更多还原

【Abstract】 <ABSTRACT>In order to study the bonding mechanism between the bonding agentand human tooth surface, we adopt the fluorescence probe method andsynthesize adhesive coupling agent (NTG-CGE (N ),CGE(N) -1)used as aprobe of having fluorescence and excited complex (in solution ) characteri-stics. The results indicate that: 1)human dentin and enamel have their ownfluorescence spectra (Fig 1,2 ), the fluorescent intensity of fresh toothbeing higher than that of tooth in store, but their excitation and emissiontvave lengths being identical and the fluorescent characteristics of humantooth being related to hydroxyapatite Fand 2)after the tooth surface is pri-med with the adhesive coupling agent in acetone solution, the solid fluo-resence spectra change obviously (red shift,Tables 1,2; Fig 3,4 ),and afterthe coupling agent being added to Ca2+ in the solution, the fluorescencespectra of the solution also change obviously with disappearance of spectrumof excited complex (Fig 5,6 ), the ratio of central Ca2+ ion to theligand(NTG-CGE (N)or CGE (N ) -1) being 1:2 (Fig 7,8 ). By these ph-enomena, it is proved cxplicitly that there is chemical reaction betweentooth surface and the coupling agent, and we can deduce that the couplingagent chelates with Ca2+ of tooth surface.更多还原