Optimization of Dentin Bond Strength Using the Dimethylsulfoxide-Wet Bonding Strategy: A 6-Month Preliminary Study

Background: This study aimed to evaluate the effect of a dimethylsulfoxide (DMSO) wet bonding technique on the dentin bond strength of a multimode adhesive system in both etch-and-rinse and self-etch modes.

Methods: Flat dentin surfaces of 112 bovine incisors were treated with distilled water (controls) or with 50% DMSO (experimental group) before bonding using a multimode adhesive (Single Bond Universal, 3M Dental Products) in etch-and-rinse or self-etch modes. Afterwards, a tygon tube (1 × 1 mm) was placed on each specimen and filled with resin composite (Filtek Flowable; 3M Dental Products). Half of the specimens were subjected to microshear bond strength testing as the immediate bonding (n=14). The rest of the specimens were stored for 6 months at 37°C in artificial saliva. Failure modes were observed under a stereomicroscope. The data was analyzed by a two-way analysis of varriance followed by a Tukey test (P=.05).

Results: The highest bond strength values among the groups were obtained after the application of multimode adhesive in self-etch mode (P < .05). The lowest bond strength values were observed in the total-etch groups after 6 months of aging (P < .05). The bonding protocol had a significant influence on the bond strength (P < .05). Dimethylsulfoxide-wet bonding improved the bond strength of the adhesive interface.

Conclusion: Dimethylsulfoxide-wet bonding was effective to improve the quality of resin-dentin bonds of the tested multimode adhesive by reducing the adhesive failure rates. These findings suggest that 50% DMSO could be a feasible alternative to improve resin-dentin bond quality, however this application requires an additional step.

Cite this article as: Sismanoglu S. Optimization of dentin bond strength using the dimethylsulfoxide-wet bonding strategy: A 6-month preliminary study. Essent Dent. 2023;2(3):95-100.