Twenty-four Hour Bond Strength Between Layers of a Highly Loaded Indirect Composite

• Published in: Dental Materials Journal Vol. 24; no. 3; pp. 440 - 446
• Main Authors: HISAMATSU, Noriko, TANOUE, Naomi, YANAGIDA, Hiroaki, ATSUTA, Mitsuru, MATSUMURA, Hideo
• Format: Journal Article
• Language: English
• Published: Japan The Japanese Society for Dental Materials and Devices 2005
• Subjects: Bonding agent; Composite Resins - chemistry; Dental Bonding; Dental Cements - chemistry; Dental Materials - chemistry; Dental Prosthesis Repair; Dental Stress Analysis - instrumentation; Dentin - ultrastructure; Dentistry; Humans; Indirect composite; Materials Testing; Methacrylates - chemistry; Polyurethanes - chemistry; Shear Strength; Silane; Silanes - chemistry; Stress, Mechanical; Temperature; Time Factors; Water - chemistry
• ISSN: 0287-4547; 1881-1361
• DOI: 10.4012/dmj.24.440

This study evaluated the repair bond strength of Estenia composite. Disk specimens of a dentin material were conditioned with varying combinations of silane primer (Add-on Primer, Clearfil Porcelain Bond Activator, Clearfil Porcelain Bond Activator+Clearfil Mega Bond-Primer, Porcelain Liner M, and unprimed) and bonding agent (Clearfil Mega Bond-Bond, Modeling Liquid, Stain Diluent, and no bonding agent). After photopolymerization of the enamel material placed on each surface, the specimens were either wet- or dry-stored at 37°C for 24 hours. Average shear bond strength varied from 24.9 to 61.4 MPa, where the Clearfil Porcelain Bond Activator+Clearfil Mega Bond-Bond group and the Add-on Primer+Modeling Liquid group showed the greatest bond strength for dry and wet conditions respectively. To achieve reliable bond strength between layers of Estenia composite, it is highly recommended to use specific combinations of silane primer and bonding agent.