Shallow caries is mainly judged by color, shape and depth of caries, for example, the clinical manifestation of shallow caries on anterior teeth and labial surface is generally chalky white, and it feels a little rough when examined with a probe, and some shallow caries is light yellow, and it occurs in the sulcus caries of posterior teeth, and the caries range is also the range of shallow caries within the enamel. Shallow caries occurs in the front teeth, the lip surface is chalky, it is not recommended to grind out and carry out filling treatment, the chalky enamel change is restored by infiltration resin, infiltration treatment is a new technology that has emerged only in recent years, it only needs to grind and polish the surface, and then infiltrate with infiltration resin, it does not need to destroy the enamel structure of the tooth surface.