A comparative study of different bleaching techniques, regarding the color change, stability and postoperative hypersensitivity: a randomized controlled clinical trial

Aim: In the management of patients with discolored teeth, would home bleaching alone or in combination with inoffice bleaching give better tooth color stability than in-office bleaching? This study aimed to test the effect of different bleaching techniques on color change, stability, and hypersensitivity. Methods: A total of 21 patients were collected and randomly divided into 3 equal groups (n = 7), the first group in-office treatment with 25% hydrogen peroxide, the second group at-home bleaching with 9.5% bleaching treatment), and the third group in-office and at-home as a combined treatment. Testing for color stability was completed; at baseline, 1 day after, 1 week after, 1 month after, and 6 months after treatment using the VITA Easyshade® spectrophotometer. Testing for hypersensitivity was completed; immediately after treatment, 24 h after, 48 h after, and 1 week after treatment using a visual analog scale. Results: The current study found that there was no significant difference between mean values and standard deviation of the three bleaching techniques regarding color change (∆E) and stability in follow-up periods; hypersensitivity faded for all tested groups on a follow-up period of seven days. Conclusion: The different tested bleaching techniques showed similar clinical efficiencies in a follow-up period of 6 months. Also, the different tested techniques showed equal color stability. The different tested techniques presented a similar degree of hypersensitivity which faded in the 7 days follow-up.