My 2 front teeth shifted recently. I am thinking of getting my veneers replaced soon, at least that one that shifted forward. Will too much enamel have to be removed on that one that it'll need to be a crown? I'd like to preserve as much of my teeth as I can for as long as possible. I don't want to pay $1000+ for orthodontics and then have to replace the veneers anyway in the near future. They are starting to stain around the margins on a couple of them. I've had them for 6.5 years.