Reabilitação protética unitária com utilização do sistema CAD-CAM CEREC - versão Chairside

Abstract

Introduction: In the last two decades, there has been a great development in design technology and computer-aided machining (CAD-CAM) applied to dentistry, particularly in the area of Fixed Prosthodontics. Among the systems on the market, the CEREC® system is the oldest and most implemented and has two versions: one for use within surgery (chairside) and another for use within the dental laboratory. The main advantage of the first version is the possibility to perform a single-unit fixed restoration (partial or total) using dental ceramic within surgery, shortly after the execution of the tooth preparation, contributing to the reduction of treatment time. In this thesis we review literature dedicated to CAD-CAM technology, and we present a clinical case of a Fixed Prosthodontics consultation of the Catholic University of Portugal. Case Study: Female patient, with little willingness to attend the University Dental Clinic of the UCP, and with dyschromia on the tooth 21. After registration of the diagnostic elements, a treatment plan was established in which a full feldspathic ceramic crown was performed using CEREC® system – chairside version. Discussion: The optical behaviour of a feldspathic ceramic is determined by: an association of the underlying tooth structural color, ceramic thickness and color of the cement used. The result obtained was not the desired because of the final color of the restoration after cementation (level B). In this case study, we used self-etching adhesive cement, Multilink Automix® with transparent color (material available at the University Dental Clinic of the UCP). The tooth had an endodontic treatment present and had discoloration of the dentine so it would have been more appropriate the use of an "opaque white", with the aim of creating a greater opacity over the stump. However, regarding the management of the consultation, the use of CAD-CAM technology and the end result of the restoration (marginal adaptation, anatomical shape and texture), the work was satisfactory (level A) and the patient was pleased with the result obtained. Conclusion: The CEREC® system – chairside version allows for feldspathic ceramic restorations to be made in a single consultation and requires a thorough knowledge of the restorative materials and cements to be used in each clinical situation.

Date of Award	2012
Original language	Portuguese
Awarding Institution	Universidade Católica Portuguesa
Supervisor	André Correia (Supervisor) & Filipe Araújo (Co-Supervisor)