Kadoma Yoshinori, Kojima Katsunori
Department of Applied Functional Molecules, Division of Biofunctional Molecules, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Japan.
Dent Mater J. 2005 Dec;24(4):494-502. doi: 10.4012/dmj.24.494.
Adhesive resins for precious metals were prepared by adding an adhesion promoting monomer to MMA-PMMA/TBBO resin. Precious metal alloys bonded by the adhesive resin were thermocycled 0, 1,000, 2,000, or 4,000 times in water between 4 and 60 degrees C, and tensile bond strengths were measured. Debonded metal surfaces after the tensile test were analyzed based on an area of cohesive failure. Three-way ANOVA revealed that all the three parameters--adherend, adhesive monomer, and number of thermal cycles--exhibited a significant influence on bond strength. Bond strength significantly decreased with increasing number of thermal cycles except for resin with 9,10-epithiodecyl 4-vinylbenzoate (EP8VB) to Au alloy. Mean bond strength of adhesive resin with 9,10-epithiodecyl methacrylate (EP8MA), EP8VB, or 3,4-epithiobutyl 2,2-bis(methacryloyloxymethyl)propionate (EP2BMA) exceeded 22 MPa after 4,000 thermal cycles. Analysis of debonded surfaces revealed the applicability of EP8MA, EP8VB, and EP2BMA as an adhesive monomer component of adhesive resin formulations.
通过向甲基丙烯酸甲酯-聚甲基丙烯酸甲酯/三丁基硼酸盐（MMA-PMMA/TBBO）树脂中添加增粘单体来制备用于贵金属的粘结树脂。用该粘结树脂粘结的贵金属合金在4至60摄氏度的水中进行0、1000、2000或4000次热循环，然后测量拉伸粘结强度。基于内聚破坏面积对拉伸试验后脱粘的金属表面进行分析。三因素方差分析表明，所有三个参数——被粘物、粘结单体和热循环次数——对粘结强度均有显著影响。除了含9,10-环氧硫代癸基4-乙烯基苯甲酸酯（EP8VB）的树脂与金合金外，粘结强度随热循环次数的增加而显著降低。经过4000次热循环后，含9,10-环氧硫代癸基甲基丙烯酸酯（EP8MA）、EP8VB或3,4-环氧硫代丁基2,2-双（甲基丙烯酰氧基甲基）丙酸酯（EP2BMA）的粘结树脂的平均粘结强度超过22兆帕。对脱粘表面的分析表明，EP8MA、EP8VB和EP2BMA可作为粘结树脂配方的粘结单体成分。
