Unlike a crown, which involves more extensive shaving of a tooth (and which is appropriate in some situations) a properly done veneer only requires the removal of the outermost layer of enamel (0.3 - 0.5 mm to be specific) and so is a relatively conservative treatment option. Before the technical elements come into play, however, your new smile must be envisioned and designed by a doctor with an artistic eye and a deep understanding of natural beauty.