Purpose: A case control study was performed to investigate the effect of silver diamine fluoride (SDF) and potassium iodide (KI) [Riva Star, SDI] on the microtensile bond strength between glass ionomer cement and carious primary dentin and to evaluate the mode of restoration failure. Methods: Forty carious primary molars were sectioned into halves through the carious lesions and randomly allocated to test and control groups. The test specimens were treated with SDFand KI with concentration of 0.06 gm/ml fluoride ions and the control specimens with deionized water. The samples were stored in artificial saliva for 14 days in normal room temprature, 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 with tension at 1 mm / minute until failure. Mean bond strengths were compared using the paired t test and the failure mode was recorded. Results: The mean microtensile strength for the test group was 7.4 MPa (±5.1 SD) and 6.3 (±4.6) for the control group (P>0.05). Most common failure mode was the mixed failure in both groups. Conclusion: Silver diamine fluoride and potassium iodide does not adversely affect the bond strength between glass ionomer cement and carious primary dentin in vitro.