Are existing teeth heavily reduced for veneers?

The principle of laminate veneers is to shave only the front surface of the tooth minimally, by about 0.3-0.7mm — thinner than a fingernail. Depending on your tooth alignment and thickness, no-prep veneers that require almost no shaving may be possible. 1) If your teeth are tilted inward or small in size, no-prep veneers are more likely to be an option. 2) If your teeth protrude or overlap, some reduction is needed. The exact amount of reduction is determined after a detailed diagnosis.