CEREC : Natural experience thanks to Biojaw

In order for restorations to look as natural as your own teeth, it is not only the color, it's a question of anatomy and morphology of the row of teeth. A new CEREC application, Biojaw takes this total situation as the basis for a first impression - with exceptional results.

For the restorative dentist, one or more crowns present a multi-faceted challenge. The restoration must be both functional and aesthetically acceptable in the patient’s entire row of teeth The CEREC system with its new Biojaw application supports this effort in a fascinating way – the entire scanned area is used to calculate a basis for a first restoration impression for the individual patient. This means that the system records all existing teeth in the upper and lower jaw in order to develop a proposal that is optimized for the total jaw and that fits the existing teeth of the patient. It is also characterized by a natural anatomy below the equatorial plane of the teeth.

"It makes the restoration as a whole seem natural", says Roddy MacLeod, Vice President Dental CAD/CAM Systems at Sirona. ?The very first proposal is so good that it hardly needs reworking." The current software uses improved algorithms, which provide for the processing of feldspar, glass and silicate ceramics for smoother surfaces and very detailed preparation margins. The new extra-fine grinding tools for the four-motor CEREC MC XL Premium Package can be used to grind out deeper fissures and smoother surfaces.

Individual solution instead of a standard solution
This functionality is far from self-evident. The human tooth is as unique as a fingerprint. Distinctive features can be detected on all teeth in the human set. A research group of Prof. Dr. Albert Mehl of the University of Zurich and Prof. Dr. Volker Blanz of the University of Siegen came to these conclusions. On this basis, a method has been developed that is already integrated in the CEREC system as a biogenic occlusal surface. The advantage lies in the considerable improvement in occlusion. The more individually this can be formed, the greater its functionality.

With the total scanned area as a reference, as realized by Biojaw, the advantage over the standard solution of using dental libraries and databases is even more apparent. The initial proposal for restoration is based on biostatistical rules of all scanned teeth and thus offers an individual custom-made piece.

Crowns, veneers and fully anatomical bridges can be customized immediately to produce inlays and onlays. The time required for manual adjustment is minimal, so the efficiency is increased. The software is easy to use and fits perfectly into the known CEREC workflow.