If you swish with hydrogen peroxide everyday you will have the same results plus excellent gum tissue! Recommend swishing with peroxide for minutes morning and night. It kills bacteria that causes decay, gingivitis, periodontal disease. Worth a shot!
Mix 5 drops of Hydrogen Peroxide tbsp of Baking Soda. Brush your teeth normally using the mixture and lett sit on your teeth for a few minutes before rinsing. Repeat daily until you notice a brighter, whiter smile.