Dentin bond strength and dentinal tubules occlusion of one-step adhesives

• Published in: Adhesive Dentistry Vol. 25; no. 3; pp. 182 - 189
• Main Authors: ITO, Shuichi, SAITO, Takashi
• Format: Journal Article
• Language: Japanese
• Published: Japan Society for Adhesive Dentistry 2007
• Subjects: bond strength; dentinal tubules occlusion; one-step bonding
• ISSN: 0913-1655; 2185-9566
• DOI: 10.11297/adhesdent1983.25.182

This study evaluated bond strength to dentin and dentinal tubules occlusion of one-step adhesive systems. The superficial occlusal dentin of28extracted human molars was used in this study. The dentin surfaces were treated with three one-step adhesives: SI-R20603 (SI-R), Fluoro bond Shake One (SO), Clearfil tri-S Bond (TS) and one two-step adhesive: Fluoro bond II (FB). First, micro-tensile bond strength in each specimen was measured in a universal testing machine. Next, dentinal tubules occlusion in each specimen was measured using a fluid filtration system. Micro-tensile bond strength in FB was significantly higher than that in SI-R, SO and TS. There was no significant difference among SI-R, SO and TS. Moreover, there was no significant difference in fluid movement among all adhesives. These results indicated that one-step adhesive achieves excellent dentinal tubules occlusion although it is inferior to two-step adhesives in dentin bond strength.