First thing I would advise you to do is to stop brushing so “hard”! Those “whitening” toothpastes can really cause enamel abrasion which will cause your teeth to stain more easily in the future. The “canine” teeth are naturally more yellow then the four front teeth, that is natural. The best and safest way to whiten your teeth would be with the whitening strips or trays. The solution in those products will not damage the ...