[Effect of bonding agents in the degree of microleakage around posterior composite resin restorations].

Odontostomatologike proodos Pub Date : 1989-08-01
J Tzoutzas, G Mountouris, G Vougiouklakis
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Abstract

The purpose of this in vitro study was to examine, by the dye technique, the microleakage pattern of two posterior composite resin materials, alone or combined with three commercially available dentin bonding agents. Composite resins used were P-30 (3M) and Heliomolar (Vivadent). The bonding agents were Gluma (Bayer), Scotch-bond LC (3M) and Dentin Adhesit (Vivadent). MOD cavities were prepared on extracted posterior teeth with a 330 tungsten carbide bur, in an airtor handpiece. The gingival floor of the mesial surface was located in the enamel above the CEJ and the distal gingival floor in the cementum below the CEJ. Specimens were thermocycled between 4 degrees and 60 degrees C for fifty cycles of two minutes each and imbibed for 10 hours in a 2% basic fuchsin solution and split in two halves. According to the results we obtained we came to the conclusion that: Both composite resins exhibited significant microleakage when they were used alone, without bonding agent. The gingival floor of the mesial surface (located in the enamel) exhibited in most specimens, less microleakage than the distal one. The use of bonding agents decreased but not eliminated the microleakage at the gingival floor of the cavities.

【粘结剂对复合树脂后牙修复体周围微渗漏程度的影响】。
本体外研究的目的是通过染色技术检查两种后牙复合树脂材料单独或与三种市售牙本质粘接剂联合使用时的微渗漏模式。使用的复合树脂为P-30 (3M)和Heliomolar (Vivadent)。粘接剂为Gluma (Bayer)、Scotch-bond LC (3M)和牙本质粘接剂(Vivadent)。用330碳化钨齿柄在取出的后牙上制备MOD空腔。近表面的龈底位于CEJ上方的牙釉质中,远端龈底位于CEJ下方的牙骨质中。样品在4度和60度之间热循环50次,每次2分钟,在2%的碱性品红溶液中吸收10小时,并分成两半。根据我们得到的结果,我们得出结论:两种复合树脂在单独使用时都表现出明显的微泄漏,没有粘合剂。大多数标本的近中面龈底(位于牙釉质中)出现微渗漏,远端较少。粘结剂的使用减少了但不能消除牙槽龈底的微渗漏。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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