Özet:

For many years in the protetic restoration of endodontic treated teeth with excess material loss in the Crown part, post-coral restorations that are supported by root channels are used. The success of post-cor restorations is closely linked to the technician of coating as well as the post materials and restoration materials used. With the developing computer-backed design/computer-backed production (CAD/CAM) technology, post-core restorations can be applied in a single session and in a single piece of different ceramics. The use of new materials that are suitable for processing in CAD/CAM devices and show structural differences in post-cor restorations is important for the success of these restorations. It is believed that this means that excessively destroyed teeth can be provided for a long-term service in very short time, with low cost and high-compatible restorations. In this case presentation, the endodontic therapeutic aim is to present the aesthetic restorations of the endodontic therapeutic tooth, in which both post-cor and crown restoration are completed with the CAD/CAM system in a single session. In the first case; the measurement taken from the upper right central tooth by traditional methods was transmitted to the CAD software by digitally scanning in the extraoral browser, post-cor and crown restoration were designed separately on virtual models and both structures were manufactured from lithium disilicate material and the tooth was simulated. 2nd In the case; the upper left side tooth with a very wide channel was taken digital measurement with the intraoral scanner from the neighbor and opposite tooth, the post-cor and crown restoration were designed separately on the virtual models and the post-cor resin was produced from nanoseramic material, while the crown was produced from lithium disylate material. In two cases, the CAD/CAM system and the different production methods and different materials were used while restorations were completed in one session, the treatment time was shortened and aesthetically satisfying restoration was made. As a result of the 1 year follow-up of both vaccines, no complications were recorded and high patient satisfaction was observed. Keywords: Lithium disilica CHAIRSIDE ESTHETIC REHABILITATION OF ENDODONTICALLY TREATED MAXILLARY ANTERIOR TEETH WITH EXTENSIVE LOSS OF TOOTH STRUCTURE USING CAD/CAM SYSTEM: REPORT OF TWO CASES ABSTRACT Post-core restorations supported by root canals have been generally used for decades in rehabilitation of endodontically treated teeth have insufficient tooth structure. Success of post-core restorations are closely related with post and restorative materials as well as application techniques of the restorations. With the recent development of computer aided design and computer aided manufacturing (CAD/CAM) technology, post-core retorations can be chairside and one-piece which manufactured from different restorative materials. Using new different materials which can be milled in CAD/CAM devices for rehabilitation of post-core restorations is important for the success of these restorations. This technology enables the manufacturing of low cost, time consuming and accurate fitted restorations which can be manufactured to ensure the long-term service. In this clinical report, the restoration of endodontically treated anterior maxillary teeth with extensive loss with chairside CAD/CAM system. In the first case, impressions that were taken with conventional methods from the upper right central tooth were scanned in an extraoral scanner and transferred to CAD software. Post-core and crown restorations were separately designed in virtual models, manufactured from lithium disilicate material and cemented. In the second case, digital impressions which were taken with the intraoral scanner from the upper left lateral and adjacent teeth. Post-core was manufactured from resin nanoceramic and the crown was manufactured from lithium disilicate material. In both cases, time-consuming and satisfactory chairside restorations were manufactured using different CAD/CAM methods and materials. No complication was observed during the 1-year follow-up and the patients were satisfied. Keywords: Post and Core Technique, Computer-Aided Design, Lithia disilicate