A study on nanoleakage in cervical restorations bonded with three generations of resin bonding systems

• Published in: Adhesive Dentistry Vol. 26; no. 2; pp. 118 - 123
• Main Authors: UNO, Shigeru, MORIGAMI, Makoto, SUGIZAKI, Jumpei, YAMADA, Toshimoto
• Format: Journal Article
• Language: Japanese
• Published: Japan Society for Adhesive Dentistry 2008
• Subjects: nanoleakage; resin bonding system; SEM
• ISSN: 0913-1655; 2185-9566
• DOI: 10.11297/adhesdent1983.26.118

The bonding effectiveness of three generations of resin bonding systems from the same manufacturer wasinvestigated in terms of nanoleakage. Cervical cavities of human extracted single root teeth were restored withMacbond II (MB), One-up Bond F Plus (OB) or Bond Force (BF), commercialized by Tokuyama Dental. Afterthermocycling5, 000times (TC, 5-55°C), the teeth were immersed into AgNO3 solution and then developing solution.After the teeth were sectioned and embedded, the nanoleakage along the bonding interface was observed under SEM. In MB, nanoleakage at the gingival margin and along the cavity walls was found regardless of TC, whilethe gingival margin was slightly stained with silver in OB. No nanoleakage was found in BF regardless of TC andadhesion to the wall seemed to be tight. Furthermore, the so-called hybrid layer was not found at the bondinginterface. BF, the latest system among the three generations, contains SR monomer that has been designed to havephosphate groups and polymerizable groups in a monomer molecule, resulting in higher bonding effectiveness. Acomparison of the multiple bonding systems produced by the same manufacturer may lead to revolutionarydevelopments in adhesive technology.