Effect of Silver Diamine Fluoride and Potassium Iodide on Microleakage of Composite Resin in Anterior Primary Teeth.

Aim: One of the preventive interventions for early childhood caries is the use of silver diamine fluoride (SDF), which works uniquely in the prevention of caries. The suggested method to minimize the discoloration of SDF is the use of potassium iodide (KI). However, there are concerns about the bonding properties of dentin after the application of SDF-KI. Therefore, this study aimed to investigate how SDF-KI affects composite resin microleakage in primary teeth.

Materials and methods: In this in vitro study, class V cavities were created on the buccal surfaces of 60 extracted primary canines. The samples were divided into three groups: Group I: 38% SDF solution was applied to the cavity; Group II: SDF-KI solution was applied to the cavity; and group III: the cavities were irrigated with distilled water. All cavities were filled with composite resin and subjected to a thermocycling regime (500 cycles). The dye penetration of samples was evaluated following a 24-h immersion in 1% methylene blue. Microleakage at the occlusal and gingival margins was evaluated using a stereomicroscope at 40× magnification. Data were analyzed using the Chi-squared test (p < 0.05).

Results: There was no statistically significant difference between microleakage scores at the occlusal margin (p = 0.128). At the cervical margin, the SDF-KI group had significantly more microleakage than the SDF and control groups (p = 0.001).

Conclusion: Applying the SDF-KI significantly increased microleakage in the cervical margin but had no significant effect on the occlusal margin.

Clinical significance: Regarding the beneficial effects of SDF in preventing and arresting dental caries, application of it before composite resin is suggested in controlling caries without the negative effects on microleakage. How to cite this article: Meraji A, Asadian F, Hekmatfar S. Effect of Silver Diamine Fluoride and Potassium Iodide on Microleakage of Composite Resin in Anterior Primary Teeth. J Contemp Dent Pract 2024;25(7):691-695.