Criteria that must be considered in order to optimise the success of computer aided designed and computer aided manufactured (CAD/CAM) restorations

Several factors influence the success or failure of ceramic dental restorations, and need to be considered and understood prior to embarking on these restorations. It is incumbent on the clinician to have an in-depth knowledge on the science of ceramic materials, current bonding agents and techniques, understanding and working proficiency of computer aided design and computer aided manufacture (CAD/CAM) computer hardware and software, an appreciation of oral biology, the role of occlusion and occlusal schemes, as well as recognition and management of patients with parafunctional habits. This paper will cover the principles of cavity preparation and tooth preparation designs, maintenance and / or achievement of inter-arch stability, preservation of marginal integrity, provision of occlusal stability, and digital impression techniques required to optimise accuracy. Provision of a chairside manufactured CAD/CAM dental restoration requires dentists to perform both the clinical and the laboratory aspects of the procedure. The responsibility for the quality of the final restoration thus rests in their hands alone and it is their duty to ensure they are adequately trained and skilled in all aspect