Are caps the best choice for someone who has ground their front teeth and enamel down to yellow? (Photo)

my top front teeth were replaced with caps. my bottom teeth, however, has the enamel worn off to a yellow color. the dentist suggested bonding, but some of your comments suggest they don't last long and stain more. I asked her about caps, like my upper teeth, but she didn't think that was a good idea. she said possibly endup needing a root canal. we didn't even discuss veneers?.... would caps be a better route of the three or bonding or veneers...I need something that will last and stay white.