Currently, two genres of CAD/CAM systems exist. One is used only in-office, while the other genre is a combination of in-office scanning and image transmission and milling of restorations or pouring of models in the laboratory. All systems start with scanning of the preparation, the method depending on the specific system. CAD/CAM systems have developed considerably, offering accuracy and more ...

The purpose of this study was to evaluate and compare the microleakage and marginal discrepancy of ceramic crown-copings fabricated by three different CAD/CAM systems. Material and methods: Thirty extracted premolars were prepared for complete allceramic crowns with: total convergence 10-degree, 2 mm occlusal reduction, 4.5 mm height, 1.3 mm circular reduction and chamfer marginal preparation. ...

Objective: The objective of this in vitro study was to evaluate the volumetric wear three CAD/CAM (computer-aided design/computer-aided manufacturing) ceramic materials. Materials and Methods: materials evaluated were CEREC Blocs (Dentsply Sirona), Initial LRF (GC) Amber Mill (HASS Corp). All samples (n=30) subjected simulated brushing (100,000 cycles). assessed by superimposing pre- post-brush...

OBJECTIVE The purpose of this study was to determine the effect of two extraoral computer-aided design (CAD) and computer-aided manufacturing (CAM) systems, in comparison with conventional techniques, on the marginal fit of monolithic CAD/CAM lithium disilicate ceramic crowns. STUDY DESIGN This is an in vitro interventional study. PLACE AND DURATION OF STUDY The study was carried out at the...

This paper describes treatment planning and dental rehabilitation of permanent maxillary incisors of an 11-year old patient affected by hypoplastic Amelogenesis imperfecta using CEREC chair side technology. The treatment was conducted in a multidisciplinary approach and followed by orthodontic treatment using self-ligating brackets to achieve optimum results. The teeth were treated endodontical...

OBJECTIVES The aim of this in-vitro study was to assess the long-term effects of hydrochloric acid on the surface roughness of three all-ceramic restorative materials CEREC VITABLOC Mark II CAD, IPS Empress CAD and IPS e.max CAD. MATERIALS AND METHODS Six cylindrical specimens (10mm diameter, 3mm height) of each material type were prepared, using the CEREC CAD/CAM machine. The unpolished samp...

The aim of this in vitro study was to observe the effect of hydrofluoric acid (HF) on the surface of two glass ceramics for Cerec and to compare it with the effect on a conventional glass ceramic. Discs were cut from a feldspathic ceramic block (VitaMKII) and from a leucite reinforced glass ceramic (IPS EMPRESS CAD) for Cerec. 5% and 9% HF concentrations were used during 1 min and 2 min each. A...