The material: 

A research for decades of a material offering resistance, biocompatibility and aesthetics, the industry has finally offered the dental product unmatched so far. Could ask for more?

As we have seen, the only reliable alternative to the problem of allergy, and carcinogenicity bimétallisme was until now the use of a single alloy rich in gold. "Its implementation will craft its longevity in the mouth, reliability,…, have proved their worth and has been amply demonstrated. But these alloys lose their glamour for some time. Economic factors have played against it, mainly because of too much fluctuation in the market price of precious metals. both dentists and patients and dental technicians have plunged heads lowered in the use of alloys good markets not offering guarantees requested. we saw then, here and there, an array of articles denouncing Intolerance of the body respond to these alloys non-precious and semi-precious same. research then mobilized to find a way to bypass metal alloy. Without knowing it, all the players have caused the emergence of this zirconia.

And yet, here we are a subject which certainly offers all guarantees desired, but which remain expensive, mainly because of its implementation and the enormous investment it entails. Despite a mad competition now raging in the industry, not will ever be a material "economic".

The zirconia, more precisely: Zirconium dioxide Tétragonal partially stabilized with Yttrium is a ceramic poly-crystalline pure high density.
Son mode de fabrication et de mise en oeuvre fait appel à la CFAO.  En effet,  elle ne peut être mise en forme par une technique artisanale (pressée, barbotine, fronde…).  C’est en 1993, que fut développée la zircone dite HIP qui résulte d’une opération isostatique de compactation à haute température (HIP : Hot Isostatic Pressure). His method of manufacture and implementation appealed to the CAM. Indeed, it can be shaped by a technique (pressed, slushies,… frond). In 1993, which was developed called zirconia HIP as a result of a transaction isostatic compaction of high temperature (HIP: Hot Isostatic Pressure). L’amélioration des caractéristiques des poudres (degré de pureté, aptitude au frittage, granulométrie…) a joué un rôle décisif pour son utilisation  médicale. The improved characteristics of powders (purity, sintering ability, size…) has played a decisive role in its medical use.

It should be noted that the machining of zirconia HIP requires powerful machines. System DCS (distributed control system), will serve as the technical solution predestined. It consists of a scanner and a machine tool. Le scanner permet, grâce à son logiciel 3D, l’enregistrement de données numérisées des préparations prothétiques et la conception virtuelle des infrastructures, qui sont transmises à l’unité de production pour leur réalisation. The scanner allows, thanks to its 3D software, the recording of digital data preparations prosthetic design and virtual infrastructure, which are transmitted to the production unit for their achievement. Cette unité de fabrication assistée par ordinateur assure une constance de qualité et une adaptation parfaite de l’ordre du 10 microns. This unit of computer-aided manufacturing ensures a consistent quality and a perfect match of the order of 10 microns.

However, these investments are not within the reach of small production units that are most dental laboratories. Then we see for some months, major corporations which opened a productive sector for the dental and offer, through the subcontracting, the possibility of achieving these armatures zirconia.

This trend will continue toward a material increasingly powerful; implementation increasingly automated, not to say robotic. In a certain future, will we get rid completely of the craftsman that we are?'s hand dental replaced, for a good part of the work, for digitization.

This is obviously the industry introducing this service which will reap the benefits. Once the ground prune in small productions eliminated, the few businesses that otherwise managed our small labs, which will remain on the surface with regard to agree pricing policy.

Here is a technological breakthrough that leads undoubtedly famous upheavals in the World Dental and in all its aspects.

Zirconia is the common name of zirconium oxide (ZrO2).

This material is a ceramic technique.

Please do not confuse the Zirconia with Zircon:

Zirconia = zirconium oxide (ZrO2) polycrystalline, opaque appearance
 Zircon = Cubic Zirconium oxide Zr O2 or Zirconium oxide containing la Silice ZrSiO Silicate the ZrSiO  4 quadratic transparent appearance  (synthetic diamond)

Zircone (zirconium oxide ZrO2): excellent mechanical properties at elevated temperatures, low thermal conductivity at room temperature, electrical conductor at T> 1000°C 1000 ° C ,, High hardness, high wear resistance, good chemical inertia, good resistance to the attacks of metals. There are two types: non-stabilized zirconia, which is used as an additive, paving material, abrasive powder  ... And yttria stabilised zirconia (ZrO2/Y2O3 = TZP) or magnesium (ZrO2/MgO = PSZ).

Applications: crucibles, buses casting, heating elements, anti-thermal co


ting, ionic conductors. Dentures. dental prosthesis.

Ceramics zircones stabilized are characterized by:

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The preparation of the tooth:

There are no special prerequisites..

The coning of the preparation must be at least 6 °.

All edges must be rounded.

At the seam, the minimum wall thickness of the frame zirconia is 0.4mm, the minimum thickness of 0.6mm cosmetic material, we thus imposes a marginal reduction of 1.0 mm circular.

The suitable forms for marginal preparations are :

• Leave rounded pronounced (90 °)
• A shoulder with a rounded internal

It is imperative to use tongs whose jaws are covered with plastic or rubber to manipulate infrastructure.

It is advisable to take the third gingival tint to harmonize the tint of the frame zirconia with the natural teeth, taking a general hue of the prosthesis occurring in the usual manner.

As far as sealing the collage are suitable for the placement of this product. Nevertheless, we should not use cement to seal eugenol for a provisional one.

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The technique :

The practitioner takes an impression of the dental individual situation as usual.

From this footprint, the dental technician  make a positive model wich represent fauthfully the patient's mouth situation..

This model is recorded by a scanner. Either a laser or a feeler that scans the total surface of the model.

Then, one uses named technology CAD/CAM.