Ferrari Marco, Grandini Simone, Simonetti Marco, Monticelli Francesca, Goracci Cecilia
Department of Dental Materials and Restorative Dentistry, University of Siena, Italy.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2002 Nov;94(5):627-31. doi: 10.1067/moe.2002.129184.
The objective of this clinical report was to evaluate the effectiveness of a microbrush as a carrier of priming-adhesive solution in formation of resin tags, adhesive lateral branches, and resin-dentin interdiffusion zone (RDIZ) when the brush was used to bond fiber posts under clinical conditions.
Twenty endodontically treated teeth, already scheduled for extraction for endodontic or periodontal reasons, were selected for this study. The patients were informed, and their written consent was obtained. The samples were randomly divided into 2 groups of 10 samples each. In group 1, One-Step (Bisco, Schaumburg, Ill) was applied with a brush with Duo-Link resin cement (Bisco). In group 2, One-Step was applied with a microbrush with Duo-Link resin cement (Bisco). Use of the adhesive systems and resin cements was strictly according to manufacturers' instructions. The priming-adhesive solution was light-cured before the dual resin cement and the post were placed. Twenty Aestheti-Plus posts (white quartz fiber posts; RTD, St. Egreve, France) were used. A week after application, the root samples were extracted and processed for SEM observations.
Both adhesive systems showed RDIZ and resin tag and adhesive lateral branch formation. In Group 2 samples, RDIZ morphology was easily detectable and uniform along root canals. Also, resin tag formation was well represented in all thirds. In group 1 samples, resin tag formation at the apical third and RDIZ formation was less evident. Statistically significant differences were found among the two groups at the apical third.
The microbrush permitted a more uniform RDIZ and resin tag formation along the entire length of the canal than did the standard brush. The microbrush can be routinely used for bonding fiber posts into root canal preparations.
本临床报告的目的是评估在临床条件下使用微型刷作为引发 - 粘结剂溶液载体粘结纤维桩时，其在形成树脂突、粘结侧支以及树脂 - 牙本质相互扩散区（RDIZ）方面的有效性。
选取20颗因牙髓或牙周原因已计划拔除的经根管治疗的牙齿用于本研究。告知患者相关情况并获得其书面同意。样本随机分为2组，每组10个样本。第1组，使用配备双固化树脂水门汀（Bisco公司）的标准刷涂抹一步法粘结剂（Bisco公司，伊利诺伊州绍姆堡）。第2组，使用配备双固化树脂水门汀（Bisco公司）的微型刷涂抹一步法粘结剂。粘结系统和树脂水门汀的使用严格按照制造商的说明。在放置双固化树脂水门汀和纤维桩之前，对引发 - 粘结剂溶液进行光固化。使用了20根Aestheti - Plus纤维桩（白色石英纤维桩；法国圣埃格勒夫的RTD公司）。应用一周后，取出牙根样本并进行扫描电镜观察处理。
两种粘结系统均显示出树脂 - 牙本质相互扩散区、树脂突和粘结侧支的形成。在第2组样本中，树脂 - 牙本质相互扩散区的形态易于检测且沿根管均匀分布。此外，在所有三个根尖段树脂突的形成均表现良好。在第1组样本中，根尖段的树脂突形成和树脂 - 牙本质相互扩散区的形成不太明显。两组在根尖段存在统计学上的显著差异。
与标准刷相比，微型刷能使树脂 - 牙本质相互扩散区和树脂突在根管全长形成得更均匀。微型刷可常规用于将纤维桩粘结到根管预备中。
