There are no basic age for cosmetic dentistry, except in cases when children’s teeth are involved. A 12-year-old could get veneers, but not a dental implant. Generally, adults are the best candidates for cosmetic dentistry, from 20 or older. Always talk with your dentist to see if you are a candidate for cosmetic dental work. They will examine you and look at your previous history before deciding on the best course of action.