SOME EFFECTS OF WATER ON DENTIN BONDING
SOME EFFECTS OF WATER ON DENTIN BONDING
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DOI：
10.1016/0109-5641(95)80048-4
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发表时间：
1995-03-01
期刊：
影响因子：
5
通讯作者：
SODERHOLM, KJ
中科院分区：
文献类型：
--
作者：
JACOBSEN, T;SODERHOLM, KJ
目标。1)不同溶剂(水或丙酮)对牙本质底漆粘接强度的影响；2)底漆的使用时间对粘接强度的影响；3)水污染粘接树脂的转化率。将35%的HEMA与水或丙酮混合，放置在湿润的牙本质上30或120 S，晾干，用粘结树脂覆盖，然后光固化。将复合圆柱体粘接在这些表面上，在37℃下放置30d后测定剪切粘结强度，用傅里叶变换红外光谱(FTIR)测定每英里含0.05、0.1、0.2、0.4和0.8mT水的粘结树脂的转化率。两个丙酮组的粘结强度(sigma(30s)=22.2+/-2.1 Mpa和Sigma(120s)=21.5+/-3.2 Mpa)显著高于两个水组(Sigma(30s)=7.0+/-3.3 Mpa和Sigma(120s)=16.2+/-4.8 Mpa)。与丙酮基底漆相比，水基底漆的粘接强度随着引发时间的增加而提高，但没有达到两种丙酮组的水平。粘接树脂的转化率为53.5%，当每Mt树脂加水0.2mT或更多时，转化率降至25%左右。与丙酮相比，水作为HEMA基牙本质底漆的溶剂效果较差，粘结强度较低，并且需要比丙酮更长的底漆时间。这些结果的一个可能解释是水干扰树脂体系聚合的能力。
Objectives. The goats of this study were to determine how: 1) the bond strengths of hydroxyethylmethacrylate (HEMA)-based dentin primers are affected by different solvents (water or acetone), 2) the application time of these primers affect the bond strength, and 3) the conversion of water contaminated bonding resins.Methods. HEMA (35%), mixed with water or acetone, was placed on moist dentin for 30 or 120 s, dried, covered with a bonding resin, and light-cured. Composite cylinders were bonded to these surfaces, and the shear bond strength was determined after 30 d of water storage at 37 degrees C. The conversion of bonding resins containing 0.05, 0.1, 0.2, 0.4 and 0.8 mt water per mi of bonding resin was determined with FTIR.Results. The two acetone groups gave significantly (p < 0.05) higher bond strength values (sigma(30s) = 22.2 +/- 2.1 MPa and sigma(120s) = 21.5 +/- 3.2 MPa) than the two water groups (sigma(30s) = 7.0 +/- 3.3 MPa and sigma(120s) = 16.2 +/- 4.8 MPa). In contrast to the acetone-based primer, the water-based primer improved its bond strength with increased priming time without reaching that of the two acetone groups. The conversion of the bonding resin was 53.5%, which decreased to approximately 25% when 0.2 mt or more water was added per mt resin.Significance. Compared to acetone, water is inferior as a solvent for HEMA-based dentin primers and gives both lower bond strength and requires longer priming time than acetone. A possible explanation of these results is the ability of water to interfere with the polymerization of the resin systems.