The effects of Beyond cold light tooth whitening kit on bleaching discolored teeth

Objective To evaluate the effects and safety of Beyond cold light whitening kit on bleaching discolored teeth.Methods 70 subjects with discolored teeth(22 patients with tetracycline pigmentation teeth,20 with dental fluorosis and 28 with teeth color changed with age) were divided into 2 groups randomly.Patients in group 1 were bleached with Beyond cold light whitening kit,patients in the control group were bleached with Opalescence whitening kit.The change of teeth color was evaluated by VITA shade guides matching and colourimeter(PR-650) respectively.The sensitivity of teeth was also recorded.Results Teeth in both groups were whitened to some extent.The effective rate of the experimental group was higher than that of the control group(P0.05).Nine of thirty-five patients(25.7%) had slight tooth aches in experimental group,and 16 of thirty-five patients(45.7%) had different degree tooth aches in control group,there was significant difference between color difference of the two groups(P0.01).Conclusion Beyond cold light whitening kit was proved to be an effective and safe method on discolored teeth bleaching.