Can the Hydrophilicity of Functional Monomers Affect Chemical Interaction?
Can the Hydrophilicity of Functional Monomers Affect Chemical Interaction?
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DOI：
10.1177/0022034513514587
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发表时间：
2014-02-01
影响因子：
7.6
通讯作者：
Sauro, S.
中科院分区：
文献类型：
--
作者：
Feitosa, V. P.;Ogliari, F. A.;Sauro, S.
间隔链中碳原子和/或酯/聚醚基团的数量可能影响功能单体与钙和牙本质的相互作用。采用原子吸收光谱（AAS）、ATR-FTIR、薄膜x射线衍射（TF-XRD）、扫描电镜（SEM）和微拉伸键合强度（TBS）等方法，对标准合成的5种具有不同间隔链特征的磷酸酯功能单体的化学相互作用和键合强度进行了评价。测试的功能单体有2-MEP（两碳间隔链）、10-MDP（10碳）、12-MDDP（12碳）、MTEP（更亲水性聚醚间隔链）和CAP-P（中间亲水性酯间隔链）。原子吸收光谱测定的单体钙盐形成强度依次为12-MDDP=10-MDP>CAP-P>MTEP>2-MEP。FTIR和SEM分析表明，除2-MEP外，所有的单体-牙本质键都耐冲洗。TF-XRD证实了2-MEP的相互作用较弱。12-MDDP和10-MDP的TBS最高。较短的磷酸功能单体间隔链（2-MEP）诱导形成不稳定的单体钙盐，降低了化学相互作用和牙本质结合强度。在较长的间隔碳链（CAP-P和MTEP）中存在酯或醚基团可能会影响亲水性、TBS和单体钙盐的形成。
The number of carbon atoms and/or ester/polyether groups in spacer chains may influence the interaction of functional monomers with calcium and dentin. The present study assessed the chemical interaction and bond strength of 5 standard-synthesized phosphoric-acid ester functional monomers with different spacer chain characteristics, by atomic absorption spectroscopy (AAS), ATR-FTIR, thin-film x-ray diffraction (TF-XRD), scanning electron microscopy (SEM), and microtensile bond strength (TBS). The tested functional monomers were 2-MEP (two-carbon spacer chain), 10-MDP (10-carbon), 12-MDDP (12-carbon), MTEP (more hydrophilic polyether spacer chain), and CAP-P (intermediate hydrophilicity ester spacer). The intensity of monomer-calcium salt formation measured by AAS differed in the order of 12-MDDP=10-MDP>CAP-P>MTEP>2-MEP. FTIR and SEM analyses of monomer-treated dentin surfaces showed resistance to rinsing for all monomer-dentin bonds, except with 2-MEP. TF-XRD confirmed the weaker interaction of 2-MEP. Highest mu TBS was observed for 12-MDDP and 10-MDP. A shorter spacer chain (2-MEP) of phosphate functional monomers induced formation of unstable monomer-calcium salts, and lower chemical interaction and dentin bond strength. The presence of ester or ether groups within longer spacer carbon chains (CAP-P and MTEP) may affect the hydrophilicity, TBS, and also the formation of monomer-calcium salts.