Abstract: Objective To evaluate the therapeutic effects of two methods for the treatment of stains caused by dental fluorosis. Methods Twenty patients with dental fluorosis were selected and randomly divided into two groups. Ten patients in group A included 148 teeth, and 10 patients in group B included 146 teeth. The included teeth were classified as light, moderate or severe according to the CMYK colorimetric value. Teeth in group A used Opalustre microgrinding combined with Opalescence Boost clinic whitening, and teeth in group B used Opalustre microgrinding combined with Opalescence family whitening. Their whitening effects, the sensitivity, the sensitive duration and the patient's satisfaction level immediately and one week after the surgery were evaluated. Results After treatment, the total effective rate of group A was 88.5%, and that of group B was 95.2%, with significant statistical difference (P=0.026<0.05). Immediately after surgery, 1 case in group A was not sensitive, 2 cases were mildly sensitive, 2 cases were moderately sensitive, and 5 were severely sensitive. In group B, 3 cases had no sensitivity, 6 cases were mildly sensitive, and 1 case was moderately sensitive. There was a statistical difference between the two groups (P=0.037<0.05). One week after treatment, 8 patients in group A were non-sensitive, 2 patients were slightly sensitive. 7 patients in group B were non-sensitive, and 3 patients were slightly sensitive. There was no statistical difference between the two groups (P=0.500>0.05). The average sensitivity time of group A was 3.80±2.440 days, and that of group B was 4.60±3.718 days. There was no statistical difference between the two groups (P=0.576>0.05). The average satisfaction of group A was 3.00±0.816, and that of group B was 3.40±0.516 with no significant difference between the two (P=0.207>0.05). Conclusion Considering the advantages and disadvantages of the two methods, it is recommended to use microgrinding and family whitening to treat stains of dental fluorosis.

Key words: Dental Fluorosis, Microgrinding, Whitening