A 20 year old female patient complains of brownish discoloration of her teeth. She has a history of frequent tea consumption. Intra-oral examination reveals brownish staining of all teeth. Patient was suggested bleaching with CO2 laser by the dentist.
However, this treatment is currently not recommended  because:
Alteration in color post-bleaching Potential for hard and soft tissue damage Chemical changes in bleaching mixture Inadequate bleaching