On smooth enamel surfaces, white spot lesions which are the earliest evidence of demineralization are a common complication due to poor oral hygiene. Resin infiltration technique is a minimally invasive restorative treatment option that provides infiltration of the resin material into the body of the lesion and is gaining widespread clinical use. The aim of this case report is; to evaluate the results of treatment of aesthetic problems due to white spot lesions induced by demineralization on smooth surfaces of teeth with minimally invasive resin infiltration technique.