Creating a crown that does not contain metal technologies CAD-CAM (computer-aided design / computer-programmed production) differs from hand-made metal ceramics. According to a cast, that was taken, the doctor makes the model, and after it is ready, it is scanned to laser, to make a model on the computer to come crown.
Production of crown is done in two stages. In the first stage, computer milling machine from a single piece, which consists of zirconium oxide is made a framework of the crown, the frame color is selected according to natural color of the tooth. In the second phase the frame is covered with ceramic.
Full automation of the process does not occur any error, because the system sees even very small deviations.
What is CAD-CAM and what is the essence of the process?
CAD – is a computer modeling.
Individual modelling of prosthetic constructions (crowns, bridges, etc.) is done digitally using special technologies in the computer.
CAM – is computer control of producing. Production of prosthetic constructions is done using very precise high-tech milling benches (CNC), similar structure is used in spacecraft.
The application of CAD-CAM dentistry began in 1970 by Professor F. Duret from France, Col. BrusAltshuler – U.S. and Murrmann and Brandestini from Switzerland. The results of academician Murrmann survey brought to a creation of CAD-CAM system Cerec 1 (Sirona, Bensheim, Germany). Cerec 1 was the only one at the time the system which entered the market of dental products, and more than 15 years is successfully used in dental clinics.
Special technology CAD-CAM is easy to understand and shows the usual steps for the lab in its current form.
The introduction of CAD-CAM special technology in prosthetic dentistry allows you to produce constructions with very high accuracy and predictably produced quality.
At first, the model surface should be scanned and recorded on the HDD. Scanning of area model is done with the help of a mechanical scanner, or by using the technique of laser scanning. After that, with the support of appropriate software on the computer is carried out computer modelling of the ceramic frame, after this data are forwarded to the appropriate milling CNC (computernumericalcontrol) milling machine, and the frame is made of industrial harvesting of zirconia. Throughout the production phase you have a three-dimensional view of the results of your work and thus you can predict it.
Perfect precision fit of the crown achieves like this, which guarantees high aesthetics and lack of any inflammatory response in the gums. High aesthetics, strength and biocompatibility of zirconia material makes it perfect for all kinds of dental prosthetics, including front teeth.