Teeth with a natural yellow shade will generally whiten in about 1â€“2 weeks, whereas teeth with a blue/grey shade can take twice as long. Teeth that have been .
Learn about yellow teeth and what causes yellow teeth stains. Find out about ways you can whiten your yellow teeth and prevent future stains at Crest.com.. Special lights or lasers may also be used to enhance the performance of the bleach.. Begin with a whitening toothpaste like CrestÂ® 3D White Brilliance and work .