The inlays, onlays :

This is a reconstruction of the tooth that is not carried in the mouth.
This concerns decayed teeth on three sides and more.
Different materials are used to achieve that overlay.

Yellow gold
This technique is ancient, common in the 1940s, the predilection material was then the yellow 24 karat gold, selected for its unmatched qualities of ductility. Then using colloidal gold (pure gold small sponge) which was crushed within the cavity with a small sometimes mechanized gland.
By depositing the fragments after each other, the practitioner realized as a cold solder permitted by the special properties of gold.
It was a very long and delicate operation. The finished restoration behaves perfectly in time as the metal hardens gradually under the force of chewing and various wear and becoming more intimately adjusted.
Since the 1970s, thanks to the advent of high-precision impression materials, this piece is made out of the mouth of a replica of the plaster tooth and then sealed inside the tooth to heal. This method takes into account the tooth and adjacent teeth and antagonists. We can then achieve the natural curved tooth. Which is impossible in the mouth.
There is not any change in time, this stainless metal.
It is not uncommon for such restorations in the mouth, dating back over 35 years, with no trace of speepage.
This type of restoration is still part of the current armamentarium although the unsightly appearance of gold is a drawback.
We now reserve this method only in case of bruxism, because gold accept significant wear without losing its seal.

Ceramic casting
Faced with a growing public demand for invisible restorations and the discovery of new  ceramics, one could make ceramic inlays cast on a plaster replica of the tooth. This technique was abandoned for reasons of fragility and untimely fractures.

Ceramic billet
This technology was developed in the 1980s by Siemens Medical as the CEREC, later by the company Sirona. Today the latest developed version is the CEREC BLUECAM.
Thanks to an optical impression made with an endo-oral camera, computer software designs the missing part of the tooth decayed from a stored library of dental morphologies. After validation of the doctor, the computer communicates this 3D file to a milling unit on site.
This machining unit will carve in an industrial ceramic block (cooked and pressed under several tons of pressure) chosen according to the color of the tooth. The machining time does not exceed 10 minutes, after which the piece is chilled in a ceramic oven, then prepared for bonding.
This ceramic pure piece is then sealed under surgical field.
The strength of this restoration is optimal and precision adjustment 15 microns reached.
The procedure can be performed during a single appointment.
This method is used for over 10 years, and shows signs of very low aging and optimum sealing. This solution represents the most sustainable method currently known and practiced.

Dental crowns prosthetic
This is a technique for restoring a decayed tooth, or to protect a weakened tooth.
The prosthetic crown covers and protects all the tooth surfaces, such as a banding or a capsule that mimics all the features and qualities of a natural tooth. (Colot, shape, contact with adjacent teeth and antagonists)
This is a made high-tech fireworks either from traditional  print or from a 3D acquisition, reaching a fitting accuracy of 10 to 50 μm.
It will be sealed on the tooth with an insoluble sealer by the salivary fluids.

Core inlays
This prosthetic component strengthens and rebuild the remaining part of the tooth decayed by caries and root canal treatment.
This is a unique piece that will be sealed in the area of the devitalized tooth root.
This prosthetic object corresponds to the founding of the prosthetic crown when the tooth is too dilapidated for satisfactory retention of the crown.