Bond-durability of an Experimental 1-bottle Self-adhesive After 3-months Water Storage

Objective: Studies have established the clinical success of 1-bottle self-adhesive systems.  The purpose of this study was to evaluate dentin bond-durability using an experimental one-bottle self-adhesive over 3-months water storage.  Methods: 30-non-carious extracted human molars were prepared with a diamond saw & the dentin surfaces were prepared with a 600-grit SiC paper & randomly divided into 3-adhesive groups: an experimental 1-bottle self-adhesive MTB-200 (Kuraray Medical, Tokyo, Japan), 1-bottle self-adhesive Clearfil tri-S bond (Kuraray Medical, Tokyo, Japan) & 2-step self-etch adhesive Clearfil SE bond (Kuraray Medical, Tokyo, Japan).  Each adhesive was applied to the dentin surface following manufacturer's instructions.  Clearfil AP-X resin composite (Kuraray Medical, Tokyo, Japan) was incrementally built to bonded area 1.0 x 1.0mm & a height of 10mm & light cured.  After 24-hours or 3-months storage in distilled water at 37ºC, micro-tensile bond-strength tests (CHS=1.0mm/min) were performed using an Instron 4443 (n=45).  Data were analyzed by ANOVA & Tukey's test (p<0.05).  Results: The table shows mean & S.D. in MPa.  Same superscript indicates no statistically significant difference.

Conclusions: Statistical analysis showed no differences between the bond-strengths after 24-hours or 3-months storage times for the 3-adhesives. Our data suggests the dentin bond-strength of MTB-200 was very stable & not negatively affected by 3-month storage in water.