I'm trying to widen my narrow smile (4 extractions and fixed braces as a child). I've used a palate expander as far as I can (3-4mm). My dentist wants to put veneers across all 10 teeth at the front, and remove enamel. I would like to avoid this much intervention, and only put them at the back. 4 veneers, 2 behind each canine. My teeth are otherwise healthy, and I would like no prep veneers. Realistic goals?