Dentin Bond Durability of Current One-step Bonding systems

Objectives: To evaluate the micro-tensile bond strengths (MTBS) of two one-step bonding systems to dentin over 6 months. Materials & Methods: Extracted human molars were grounded with #600-grit SiC to expose dentin surface. One of two adhesive systems; Future Bond (FB, Voco, Germany) and AQ Bond Plus (AQ, Sun Medical, Japan), was applied to the dentin surface following the manufacturers' instructions, and a resin composite (Clearfil AP-X, Kuraray Medical, Japan) was built-up incrementally. All specimens were stored in water at 37 °C. After 1 day, 1 month, 3 months, and 6 months, the specimens were subjected to MTBS test. The data were analyzed using One-way ANOVA and Turkey's HSD at the confidence level of 95%. Results: Mean±SD in MPa are shown below (n=10). The results indicated that the bond strengths of FB significantly decreased after 6 months storage, while those of AQ significantly decreased after 3 months storage. Conclusion: The bond strengths of the tested one-step bonding systems decreased during 6-month water storage. Supported by the grant for COE Program, FRMDRTB at TMDU.   Table. Micro-tensile bond strengths to dentin over 6 months.

Groups that are significantly different are marked with the same superscript letters (p>0.05).