Effect of application time of colloidal platinum nanoparticles on the microtensile bond strength to dentin

• Published in: Dental Materials Journal Vol. 29; no. 6; pp. 682 - 689
• Main Authors: HOSHIKA, Shuhei, NAGANO, Futami, TANAKA, Toru, IKEDA, Takatsumi, WADA, Takahiro, ASAKURA, Kiyotaka, KOSHIRO, Kenichi, SELIMOVIC, Denis, MIYAMOTO, Yusei, SIDHU, SK, SANO, Hidehiko
• Format: Journal Article
• Language: English
• Published: Japan The Japanese Society for Dental Materials and Devices 01-11-2010; Japanese Society for Dental Materials and Devices
• Subjects: 4-META/MMA-TBB resin; Acid Etching, Dental; Acrylic Resins - chemistry; Boron Compounds - chemistry; Chlorides - chemistry; Citric Acid - chemistry; Colloidal platinum nanoparticles; Colloids; Dental Bonding; Dental Stress Analysis - instrumentation; Dentin - ultrastructure; Dentistry; Ferric Compounds - chemistry; Humans; Hydrogen-Ion Concentration; Materials Testing; Methacrylates - chemistry; Methylmethacrylates - chemistry; Microscopy, Electron, Scanning; Microtensile bond strength; Nanoparticles - chemistry; Photoelectron Spectroscopy; Platinum - chemistry; Resin Cements - chemistry; Stress, Mechanical; Surface Properties; Tensile Strength; Time Factors; Water - chemistry
• ISSN: 0287-4547; 1881-1361
• DOI: 10.4012/dmj.2009-125

The purpose of this study was to investigate the effect of application time of colloidal platinum nanoparticles (CPN) on bond strength. Dentin surfaces were subjected to one of the following treatments: (A) Etching with 10% citric acid-3% FeCl3 solution (10-3 solution); (B) Etching with 10-3 solution followed by applying CPN as a primer solution for 10, 20, 30, or 60 seconds; and (C) Priming with CPN for 10, 20, 30, or 60 seconds followed by etching with 10-3 solution. An acrylic rod was bonded to each treated dentin surface using 4-META/MMA-TBB resin. Bonded specimens were sectioned into beams for microtensile bond strength testing. In groups (B) and (C), highest bond strength was obtained when dentin surfaces were treated with CPN for 30 seconds. This meant that the CPN primer solution either enhanced the penetration of resin into dentin or the degree of conversion of 4-META/MMA-TBB resin. Within the limitations of this study, treatment with 0.1 mN CPN primer solution followed by 20 seconds of water rinsing resulted in high bond strength.