Effect of Combined CO₂ Laser Irradiation and Sodium Fluoride Varnish on Enamel Surface Morphology and Surface Elemental Composition: An In Vitro Split-Tooth Study.

CO₂ laser treatment applied after sodium fluoride varnish increased fluoride uptake into tooth enamel and altered its surface structure compared to varnish alone in this laboratory study of extracted teeth. However, the authors note that these changes do not demonstrate improved cavity resistance or clinical benefit without further clinical evidence.

A plain-English summary of the study's own findings — we don't add our own claims or interpretation. Read the full paper for the complete methods and results, and apply your own clinical judgement.