The Effect of Silver Diamine Fluoride on the Microtensile Bond Strength of Glass-Ionomer Cement

Purpose: The study objectives were to investigate the effect of silver diamine fluoride (SDF) on the microtensile bond strength between glass ionomer cement and carious primary dentin; and evaluate the mode of restoration failure.

Method: Forty carious primary molars were sectioned in half through the middle of the carious lesion. The two specimens were randomly allocated to test and control groups. The test group specimens were treated with 38 % SDF, and the control group received deionized water. The samples were stored in artificial saliva for 14 days at 37^OC, and the dentin surfaces were conditioned and restored with Fuji IX GP Extra. After 24 hours in artificial saliva, the specimens were prepared for microtensile bond strength testing and stressed in tension at one mm per minute until failure. Mean bond strengths were determined and compared using the paired t test. The failure mode was assessed with a stereomicroscope under 40 X magnification.

Results: The mean microtensile strength for the test group was 7.4 MPa (SD=±5.1)and 6.3 (±4.6) MPa for the control group (P>0.05). Most common failure mode was the mixed failure mode in both groups.

Conclusion: Silver diamine fluoride does not adversely affect the bond strength between glass ionomer cement and carious primary dentin in vitro.