The effect of pulse activation on microleakage of a 'packable' composite resin and two 'ormocers'.
The effect of pulse activation on microleakage of a 'packable' composite resin and two 'ormocers'.
复制标题
脉冲激活对“可包装”复合树脂和两种“ormocer”微泄漏的影响。
DOI：
10.1111/j.1365-2842.2004.01337.x
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发表时间：
2004
影响因子：
2.9
通讯作者：
Y. Papadogiannis
中科院分区：
文献类型：
--
作者：
M. Helvatjoglu;K. Kalinderis;L. Pedulu;Y. Papadogiannis
本研究的目的是研究脉冲聚合对一种可包装复合树脂和两种有机改性陶瓷（ormocers）的微渗漏的影响，在高C因子制剂中。在60颗新鲜拔除的前磨牙或磨牙上制备牙釉质咬合缘和牙本质龈缘的Ⅴ类洞型。牙齿被随机分配到12个实验组（5颗牙齿），代表不同的修复系统，聚合模式和热循环测试。三组各20颗牙齿，分别用以下修复系统之一修复：Scotch bond 1/Filtek P 60，Admira bond/Admira，Etch&Prime 3.0/Definite。每种修复系统的10个片段（两个实验组）常规聚合，而其它10个片段用脉冲程序聚合。将标本在37 ℃的双蒸水中储存24 h。每个修复系统的10个样品（30个样品，一半的标本）进行热循环，其他30个样品在37 ℃的双蒸水中保存24 h。然后用染料对所有60个标本染色，切片并对微渗漏进行评分。结果表明，不同材料的微渗漏评分无显著性差异（P > 0.05）。热循环后，常规聚合的实验组的微渗漏显著高于其他组（P < 0.05）。常规聚合组、热循环组的牙龈微渗漏显著高于（P < 0.05）。
The purpose of the study was to examine the effect of pulse polymerization on microleakage of one packable composite resin and two organically modified ceramics (ormocers), within a high C-factor preparation. Class-V cavity preparations with occlusal margins in enamel and gingival margins in dentin were prepared on 60 freshly extracted premolars or molars. Teeth were randomly assigned to 12 experimental groups (five teeth each) representing the different restorative systems, mode of polymerization and thermal cycling test. Three groups of 20 teeth each were restored with one of the following restorative systems: Scotch bond 1/Filtek P 60, Admira bond/Admira, Etch&Prime 3.0/Definite. 10 restorations of each restorative system (two experimental groups) were conventionally polymerized, whereas the other 10 restorations were polymerized with a pulse program. The specimens were stored in double-distilled water at 37 degrees C for 24 h. Ten restorations from each restorative system (30 restorations, half of the specimens) were thermocycled, the other 30 restorations were kept in double-distilled water at 37 degrees C for 24 h. Then all 60 restorations stained with dye, sectioned and scored for microleakage. Results showed that there were no significant differences (P > 0.05) among the materials with respect to microleakage scores. The experimental groups that were conventionally polymerized revealed significantly more microleakage (P < 0.05) after thermal cycling than all the other groups. The gingival microleakage was significantly more (P < 0.05) than occlusal in conventionally polymerized, thermocycled experimental groups.