甲基丙烯酸2,3 - 环氧丙酯作为牙科粘合剂中的功能化单体。
2,3-Epithiopropyl methacrylate as functionalized monomer in a dental adhesive.
作者信息
Ogliari Fabrício Aulo, de Sordi Marli Luiza Tebaldi, Ceschi Marco Antônio, Petzhold Cesar Liberato, Demarco Flávio Fernando, Piva Evandro
机构信息
Department of Operative Dentistry, School of Dentistry, Federal University of Pelotas, RS, Brazil.
出版信息
J Dent. 2006 Aug;34(7):472-7. doi: 10.1016/j.jdent.2005.11.001. Epub 2005 Dec 13.
OBJECTIVES
The aim of this study was to investigate new dentin bonding agents formulated with 2,3-epithiopropyl methacrylate (ETMA) comonomer blends.
METHODS
Synthesis and characterization of ETMA were performed. Adhesive resins with three different ETMA concentrations (0.1, 1 and 10 wt.%) were prepared. To comparison a blend with only Bis-GMA/HEMA and with 1% of GMA were used as controls. FTIR analysis was used to verify the degree of conversion. Blend copolymerization was investigated by (1)H NMR spectroscopy analysis. To investigate immediate properties of experimental adhesives, microtensile bond strength to human dentin and SEM fractographic analysis were studied.
RESULTS
ETMA was synthesized with 90% yield through a one step synthetic route. Degree of conversion for the experimental and control resins was not significantly different. Different monomers showed copolymerization among them, not presenting traces of ETMA release in 0.1 and 1% groups. Bonding agents containing ETMA had statistically higher microtensile bond strength values than the no ETMA adhesive (p<0.05).
CONCLUSIONS
Dental adhesive resin-ETMA mixtures produced increased bond strengths without harming the other properties investigated.
目的
本研究旨在探究用甲基丙烯酸2,3 - 环氧丙酯（ETMA）共聚单体混合物配制的新型牙本质粘结剂。
方法
进行了ETMA的合成与表征。制备了三种不同ETMA浓度（0.1、1和10 wt.%）的粘结树脂。为作比较，将仅含双酚A - 甲基丙烯酸缩水甘油酯（Bis - GMA）/甲基丙烯酸羟乙酯（HEMA）以及含1%甲基丙烯酸缩水甘油酯（GMA）的混合物用作对照。采用傅里叶变换红外光谱（FTIR）分析来验证转化率。通过核磁共振氢谱（¹H NMR）光谱分析研究共混物的共聚情况。为研究实验性粘结剂的即时性能，研究了对人牙本质的微拉伸粘结强度和扫描电子显微镜（SEM）断口分析。
结果
通过一步合成路线以90%的产率合成了ETMA。实验树脂和对照树脂的转化率无显著差异。不同单体之间发生了共聚，在0.1%和1%组中未检测到ETMA释放痕迹。含ETMA的粘结剂的微拉伸粘结强度值在统计学上高于不含ETMA的粘结剂（p<0.05）。
结论
牙科粘结树脂 - ETMA混合物在不损害所研究的其他性能的情况下提高了粘结强度。
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