International Journal of Computerized Dentistry, 04/2009

Ceramic inlays and partial crowns have become scientifically recognized posterior restorations. Their clinical effectiveness depends on the development of durable dental ceramics and luting materials as well as an effective bonding system. Therefore, these factors were in the focus of interest in the past. In contrast, only little attention was given to preparation techniques. However, current studies show that special preparation rules should be followed to ensure best fitting CAD/CAM ceramic restorations and long-lasting clinical success.This paper describes preparation requirements by means of detailed three-dimensional schematic drawings and then deduces the clinical procedure for the preparation of ceramic inlays and partial crowns with standardized preparation instruments. Keywords: preparation technique, preparation design, preparation instruments, depth marking, ceramic inlays, ceramic partial crowns, production of CAD/CAM restorations, adhesive bonding, risk of fracture, cavity angle

Purpose: To evaluate the accuracy of detecting cephalometric landmarks automatically by computer. Materials and Methods: Digital image processing algorithms (edge-based and morphological) in addition to mathematical algorithms (knowledge-based) were used to develop a program for the identification of 15 lateral cephalometric landmarks on digital cephalograms. Results: The automatic landmark identification system was clinically acceptable (p > 0.05 comparing with 2-mm error range) for five landmarks. Conclusion: The automatic landmark identification is accurate for only some landmarks. Additional studies may be necessary to improve this method. Keywords: lateral cephalometry, software, automatic landmark identification

The temporary restoration of single-tooth gaps in the esthetically demanding anterior region represents a major challenge to the dentist and his/her team. The possibility of restoring single-tooth gaps after implantation is discussed in this paper, and we describe how a computermilled drilling template made of composite can be converted with simple means into an esthetically attractive adhesive bridge. Keywords: drilling template, bone mapping, adhesive bridge, Cerec

This paper describes the production of CAD/CAM prefabricated lithium disilicate abutments using electroplated secondary telescopic copings on one-piece Bauer screw implants for the retention of removable prostheses that are cemented in the mouth free of stress. Keywords: One-piece implants, lithium disilicate ceramic abutments, electroplated telescopic copings, removable prosthesis, prefabrication with CAD/CAM