Piracicaba Dental School, University of Campinas, Sao Paulo, Brazil.
Curr Pharm Des. 2012;18(34):5553-8. doi: 10.2174/138161212803307635.
One of the goals of endodontic treatment is to achieve a complete, tridimensional, hermetic sealing of the root canal system to prevent the entry of microorganisms or their products through both the coronal and apical pathways. Gutta-percha is the most widely used material for root canal filling and despite its numerous properties, such as biocompatibility and thermoplasticity, it has however an important limit: the lack of adhesion to the canal walls. Attempts to address this problem have been made over the years by using endodontic cements capable of bonding to canal dentine but their tendency to resorption in time can compromise the quality of treatment. The first step towards a real adhesive endodontic filling(4) is rather recent; in fact, it goes back to 2003 when, on the occasion of the American Dental Association (ADA) Annual Session, Resilon Research LLC introduced a new canal filling adhesive system based on a thermoplastic synthetic resin material called Resilon™. The real innovation of this system is its capacity of creating a core made of Resilon™ bonded to the cement which adheres to dentine walls previously conditioned with a self-etching primer(4) so no changes in the techniques of canal preparation are required. The aim of this study was to evaluate the capacity of two filling materials (gutta-percha and Resilon) to adapt to the canal anatomy, especially on the apical third, using the continuous wave of condensation technique. Our data suggest that in the third apical the gutta-percha best shows rheological properties that are as important as the bond capability.
根管治疗的目标之一是实现根管系统的完全、三维、密封，以防止微生物或其产物通过冠方和根尖途径进入。牙胶是根管填充最广泛使用的材料，尽管它具有许多特性，如生物相容性和热塑性，但它有一个重要的限制：缺乏与根管壁的粘附力。多年来，人们一直试图通过使用能够与根管牙本质结合的根管水泥来解决这个问题，但它们随着时间的推移而被吸收的趋势可能会影响治疗的质量。真正的根管粘结性填充的第一步是最近才实现的；事实上，它可以追溯到 2003 年，当时在 ADA 年会上，Resilon Research LLC 推出了一种基于热塑性合成树脂材料的新型根管填充粘结系统，称为 Resilon™。该系统的真正创新之处在于它能够创造一个由 Resilon™制成的核心，与用自酸蚀底漆预处理过的牙本质壁粘结的水泥结合，因此不需要改变根管准备技术。本研究的目的是评估两种填充材料（牙胶和 Resilon）在使用连续波冷凝技术时适应根管解剖结构的能力，特别是在根尖三分之一处。我们的数据表明，在第三根尖处，牙胶表现出的流变学特性与结合能力一样重要。
