Range of Application: Exogenous stains caused by smoke, tea, cola, coffee, etc. Endogenous stains caused by tetracycline pigmentation tooth, dental fluorosis, plaque teeth, or other unknown reasons. Whitening Principle Teeth Whitening Gel -- CP (carbamide peroxide), oxidizing reaction on the teeth to restore the original natural white of teeth. Usage of Teeth Whitening Pen: .Brush teeth to ensure they are clean and dry them. .Shake teeth whitening pen for 5 seconds. Remove cap from the brush end and twist clockwise several times, until the gel covers the brush tip. .Brush a thin layer teeth whitening gel onto teeth, avoid gums or lips, and smile for 1 minute. Do not rinse, eat, or drink within one hour. .Repeat when necessary. Tips: It is most efficient if treatment are done consecutively. Treatment of over 2 times per day is NOT recommended. Avoid deep pigment food or drink during whitening period and 2 weeks after your teeth whitening to maintain best results.

Range of Application: Exogenous stains caused by smoke, tea, cola, coffee, etc. Endogenous stains caused by tetracycline pigmentation tooth, dental fluorosis, plaque teeth, or other unknown reasons. Whitening Principle Teeth Whitening Gel -- CP (carbamide peroxide), oxidizing reaction on the teeth to restore the original natural white of teeth. Usage of Teeth Whitening Pen: .Brush teeth to ensure they are clean and dry them. .Shake teeth whitening pen for 5 seconds. Remove cap from the brus