Abstract:

Objective To observe the bleaching effect and side effects of BEYOND Tooth Whitening System in different light time.
Methods Postoperative tooth color change and pulp gum stimulated situation of 54 patients who were given different light time of bleaching treatment were recorded.
Results The differences in color of the 3 experimental groups were statistically significant(P<0.05), in gum and pulp reaction to the drug stimulation was statistically significant(P<0.05), all these differences were in group 3(12 minutes)> in group 2(10 minutes) and >group 1(8 minutes), P<0.05 between 12 minutes and 8 minutes.
Conclusion Increased light exposure time was associated with increased whitening effect, but also associated with the increased stimulation of dental pulp and increased degree of pulp reaction, therefore it is suggested that clinical operation with light exposure should be less than 12 minute each time.

Key words: teeth whitening, light exposure time, dental pulp reaction