Porcelain laminate veneers are generally CONTRAINDICATED in a patient who:

Heavy occlusal and parafunctional forces from bruxism fracture and debond porcelain veneers, so severe bruxism is a relative contraindication. If veneers are used, an occlusal guard is essential, or full-coverage restorations may be preferred.Other options: Good hygiene favors veneers; mild discoloration and small diastema closure are common veneer indications.Key exam takeaway: Bruxism is a relative contraindication to veneers; protect with a night guard or choose full coverage.