Parafunctional habits will have a profound impact on the form and function on hard dental tissues with premature wear of enamel and dentin, resulting in fissures, cracks, and dental fractures with important impacts on pulp biology and/or periodontium. Consequences include a profound and durable modification on the orofacial elements, as masticatory muscles and temporomandibular articulations. These deformations will lead to functional problems that could be detrimental for the proper function of our patients. The goal of this lecture will be to understand and identify the different diagnoses and treatment plans that are associated to them, so we could resolve complex restorative and prosthetic problems. We will see closely the utilization of new paradigms by the rehabilitation of the Porcelain Laminate Veneers, which represent nowadays an alternative solution to the full crown. This is particularly true with the emergence of full porcelain materials and techniques. The therapeutic fields becoming larger and more complex for the clinician. We will see also the specific relationship that is bonding the prosthetic restoration to the marginal periodontium, and see how we should handle this relationship to obtain a durable and constant result, knowing how difficult it is to capture properly the cervical margins for a good result.