I'm 24 years old and had a trauma about 10 years ago to my front teeth. As you can see in the picture, 2 of my teeth have a gray coloration, and others are different shades of white/yellow/gray. The 2 highlighted teeth are not dead according to my dentist, and she does not recommend internal bleaching due to the need for root canal. Veneers are too expensive. Will whitening help? Will whitening cause the enamel to become more translucent and make the appearance worse? Thanks.