* Lee SS, Kwon SR. Ward M, Jenkins W, Souza S, Li Y. A 3-month clinical evaluation comparing two professional bleaching systems of 25% and 40% hydrogen peroxide and extended treatment outcome using a power versus a manual toothbrush, J Esthet Restor Dent. 2018; 1—8 https://doi.org/10.1111/jerd.12440.
**Results for 25% HP Zoom Kit in 45 minutes. Individual results and treatment times might vary.