Microleakage of conventional and microfilled composite restorative resins.
Microleakage of conventional and microfilled composite restorative resins.
复制标题
传统和微填充复合修复树脂的微渗漏。
DOI：
10.1002/jbm.820160614
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发表时间：
1982
期刊：
影响因子：
--
通讯作者：
Jamison,HC
中科院分区：
文献类型：
--
作者：
Retief,DH;Rutland,JR;Jamison,HC
由于传统的复合树脂难以达到令人满意的表面处理效果，微填充复合树脂已被引入牙科临床。由于两种树脂体系的热膨胀系数不同，本体外研究的目的是评价常规和微填充复合树脂的微渗漏。V类腔对接cavosurface边缘准备在中间三分之一的面部表面的冠80 noncarious人前磨牙，他们酸蚀刻内的准备工作。40个制备物用Concise复合材料修复，40个制备物用Silar微填充树脂修复。每组中的十颗牙齿分别经受5至55°C之间的循环温度变化1000、2500或5000次循环，而每组中的十颗牙齿不进行循环（对照）。牙体预备后，用45 Ca溶液浸泡18 h，拍摄接触片。微渗漏评分为0-3分，在两个颈部和occulusal边缘的膨胀。微渗漏是显着更大的颈部边缘比咬合边缘。两种树脂的咬合和颈部微渗漏差异不显著。
Microfilled composite resins have been introduced in clinical dentistry because of the difficulty in finishing conventional composite resins satisfactorily. Owing to the difference in coefficients of thermal expansion of the two resin systems, the objective of thisin vitrostudy was to evaluate microleakage of a conventional and a microfilled composite resin. Class V cavities with butt cavosurface margins were prepared in the middle third of the facial surfaces of the crowns of 80 noncarious human premolar teeth; they were acid etched within the preparations only. Forty preparations were restored with Concise composite and forty with Silar microfilled resin. Ten teeth from each group were subjected to cyclic temperature changes between 5 and 55°C for 1000, 2500, or 5000 cycles, respectively, and ten teeth from each group were not cycled (controls). After suitable preparation, the teeth were immersed in45Ca solution for 18 h and contact radiographs were prepared. Microleakage was scored 0–3 at both the cervical and occulusal margins of the restorations. Microleakage was significantly greater at the cervical margins than at the occlusal margins. Differences within occlusal and cervical microleakages among the two resins were not significant.