Abstract: Objective: To study the permeability of different permeable materials in the treatment of early enamel caries. Methods: Artificial caries model was established by demineralized liquid. The model was permeated by resin infiltration (group A), amorphous calcium phosphate agent resin (group B), and Single Bond 2 (group C). The penetration depth was measured by laser confocal microscopy to explore the treatment of early enamel caries. Results: The penetration depth of amorphous calcium phosphate agent resin (group B) was significantly higher than that of Single Bond 2 (group C), but lower than that of resin infiltration (group A). There was significant difference in the penetration depth between groups (P<0.05). Conclusion: Amorphous calcium phosphate agent resin can penetrate the enamel pores and forms a good surface sealing, however, it is different from the resin infiltration.

Key words: Amorphous calcium phosphate, Resin infiltration, Laser scanning confocal microscope, Penetration depth