The team at Ralev Dental Clinic is proud to present to you the CEREC CAD/CAM system.
CEREC (Chair-side Economical Restoration of Esthetic Ceramics) is an innovative dental system for 3D design and manufacturing of dental crowns, veneers, ceramic fillings (inlays), onlays, overlays and ceramic bridges in a single visit to the dental clinic. It is a method of CAD/CAM (Computer Aided Design/ Computer Aided Manufacturing) dentistry. It is also known as Single Visit Dentistry.
What is the CEREC system?
The CEREC system consists of 4 main parts:
* 3D scanner – a special intraoral camera for digital impressions of the teeth;
* Computer with highly specialized software for 3D design of the future crown/veneers;
* Milling machine – a machine that carves the crown/veneer of a ceramic block (IPS Emax);
* Ceramic furnace – where the completed design is painted, polished and glazed.
What are the benefits of CEREC?
* Dental restorations (crowns, veneers, inlays, onlays, overlays, bridges) are made only in one visit to the dental office, which lasts about 2 to 3 hours;
* There is no need for temporary restorations, which avoids potential problems with breakage, pain and sensitivity of the restored tooth;
* The crowns/veneers are made of the most modern and highly aesthetic materials – lithium-disilicate ceramics – IPS Emax, leucite ceramics and feldspar porcelain;
* Ability to treat caries by making ceramic fillings (so-called inlays), superior in strength and aesthetics to fillings made of photopolymer;
* Extremely precise and accurate design and creation of the dental restorations;
* Ability to make any adjustments by the dentist.
What is the process of creating crowns/veneers/inlays with the CEREC system?
The first step is to conduct a clinical examination.
During the examination, the condition of the tooth/teeth that will be treated is evaluated. X-ray images are assessed and if root treatment has been done, it is re-evaluated. The condition of the tooth is determined – presence of secondary caries, fractures, need for restoration. If any dental problems are found with regards to the tooth, they are resolved before making an appointment for the creation of the crown/veneer/inlay.
The second step is the preparation and drilling of the tooth.
The dental practitioner assesses the need and amount of drilling with regards to the chosen design – crown, veneer, inlay, bridge, etc.
The third step is taking dental impression.
Taking the digital impression is done with the 3D camera. The prepared tooth/teeth are sprayed with a special contrast powder and then scanned. The antagonist teeth and the bite situation are also photographed. Thus, the condition of the patient’s mouth is recreated using a virtual 3D model. After the scan, the patient can take a break and relax in the waiting room.
The fourth step is to create a 3D design of the restoration.
The digital impression of the upper and lower teeth and the bite situation are used to make a 3D model, which is a computer model of the actual condition of the patient’s teeth.
Using a special software the restoration (crown/veneer/inlay) is designed on the 3D virtual model.
The fifth step is creating the designed restoration.
Once the 3D model of the future crown/veneer/inlay is ready, the material which will be used is chosen. The ceramic material used in the CEREC system is of high class – feldspar ceramics, leucite ceramics (Empress), and the strongest pure ceramic material – lithium disilicate (IPS Emax). The selected ceramic block is placed in the milling module where the carving process lasts about 20 minutes.
The sixth step is the fitting of the restoration.
The patient is called back by the dentist who assesses and fits the construction in the patient’s mouth.
The restoration is evaluated and fine adjustments are carried out at this stage.
The exact colour is determined and the patient can take another break in the waiting room.
The seventh step is crystallization, painting and glazing/polishing of the construction.
This step is carried out in a special high-temperature ceramic furnace. The ceramic material crystallizes at temperatures over 800 degrees to reach maximum strength. Then the individually chosen colour is applied to the design followed by glazing. Thus, for about 15 minutes, the construction is completed.
The eighth step is the cementing or adhesively integrating of the finished construction.
The new crown/ veneer/inlay is adhesively integrated to the patient’s tooth with special high-strength cements, which provides an extremely strong and reliable connection of the restoration to the tooth tissue.
The process of creating ceramic restorations through the CEREC system takes about 2-3 hours at the dental office. This eliminates the need for two visits and 5-7 days of waiting for the dental laboratory to complete the order. The creation of temporary crowns/veneers is avoided which eliminates any inconveniences associated with them.