International Journal of Computerized Dentistry, 03/2012

Intracoronal restorations have a variable risk of cusp fracture depending on the amount of tooth structure remaining. All-ceramic restorations with a cusp-supporting design could be a long-lasting alternative. The aim of this study was to verify the clinical reliability of occlusal veneers. A total of 286 occlusal veneers made of Vita Mark II ceramic that were fabricated and inserted in 244 patients from 2003 to 2004 using the Cerec method with an optimized ceramic design were periodically re-assessed over the following years. Based on the fracture rate observed over 93 months of follow-up, the probability of survival was 99.3%, demonstrating the excellent practical suitability of the method. In light of this, it is worth reconsidering the question of treatment with intracoronal restorations versus occlusal veneers in the posterior region. Palabras clave: Cerec, overlay, all-ceramic, occlusal veneer, fracture analysis, survival rate, Cerec, Overlay

During the last 20 years, whenever participants of Cerec symposia and congresses were asked about the first item on their wish-list for improving the existing system, the most desired feature has always been the same: A powder-free camera.

This case report demonstrates two ways to fabricate modelfree implant restorations with the Cerec inLab 4.0 software. Because the patient, a woman with a history of periodontal disease, did not wish to have a removable partial denture, implant therapy was planned for the restoration of her edentulous areas 14/15 and 24/25. In addition, the restoration was to provide functional relief of the natural maxillary anterior teeth. The two implants for the first quadrant were planned as single-tooth restorations. Each was designed as a full contour implant supra-structure using the Cerec Biogeneric abutment design technique. After completing the design phase, each restoration proposal was split into two parts: a zirconia abutment and a lithium disilicate crown. For the restoration of the second quadrant, custom 20-degreeangled abutments were individualized and acquired with the Cerec camera. A block crown was then designed, milled in burn-out acrylic resin, and fabricated from a lithium disilicate glass-ceramic ingot according to the press ceramic technique. Additionally methods of provisional restorations are discussed. Palabras clave: Provisional implant restoration, soft tissue management, titanium base, zirconia abutment, optical impression, multilayer design, InLab SW 4.0, InLab 3.88, all-ceramic, press ceramic technique

Computer-aided design and manufacturing (CAD/CAM) systems have proven effective not only for the manufacture of crown and bridge frameworks, inlays, onlays and veneers, but also for the generation of all-ceramic primary telescopic prostheses in more than 10 years of use in dental technology. The new InLab 4.0 software generation makes it possible to design and mill primary telescopic prostheses with CAD/CAM technology. The computer-generated raw crowns for these restorations require very little manual adaptation. The secondary crowns are manufactured by electroforming and bonded onto the tertiary structure or framework.