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fixed prosthodontics
 

 

Fixed prosthodontics in dentistry is a technique used to restore teeth, using fixed restorations which include crowns, bridges, inlays, onlays, and veneers. Prosthodontists are specialist dentists who have undertaken training recognized by academic institutions in this field. Fixed prosthodontics can be used to restore single or multiple teeth, spanning areas where teeth have been lost. In general, the main advantages of fixed prosthodontics is the superior strength and the ability to create an aesthetic looking tooth.


Restoration types

Metals and metallic alloys
These metals are mostly used for making crowns, bridges and dentures. Pure titanium could be successfully incorporated into bone. It is biocompatible and stable.
Precious metallic alloys

> gold (high purity: 99.7%)

>gold alloys (with high gold content)

>gold-platina alloy

>silver-palladium alloy

>titanium

 

Base metallic alloys

>cobalt-chromium alloy

>nickel-chrome alloy

 

Crown
crown is used to cover a tooth and may be commonly referred to as a "cap." Traditionally, the teeth to be crowned are prepared by a dentist, and records are given to a dental technician to construct the prosthesis. The records include models, which are replicas of a patient's teeth, and the impressions used to make these models. There are many different methods of crown fabrication, each using a different material. Some methods are quite similar, and utilize either very similar or identical materials. Crowns may be made of gold or other similar metals, porcelain, or a combination of the two.


Bridge
A bridge is used to span, or bridge, an edentulous area (space where teeth are missing), usually by connecting to fixed restorations on adjacent teeth. The teeth used to support the bridge are called abutments. A bridge may also refer to a single-piece multiple unit fixed partial denture (numerous single-unit crowns either cast or fused together). The part of the bridge which replaces a missing tooth and attaches to the abutments is known as a "pontic." For multiple missing teeth, some cases may have several pontics.


Inlay
An inlay is a restoration which lies within the confines of the cusps. These restorations are considered to be more conservative than onlays or crowns because less tooth structure is removed in preparation for the restoration. They are usually used when tooth destruction is less than half the distance between cusp tips.


Onlay
An onlay is a method of tooth restoration, which covers, protects or reinforces one or more cusps. Onlays are methods for restoring teeth in an indirect way. Onlays are often used when teeth present extensive destruction due to caries or to trauma.

 

Cercon
All-ceramic restorations made of  zirconia and produced with the Cercon system have so far been approved for the following indications in the anterior and posterior region:
- Primary telescope crowns
- Crowns
- Multi-unit bridges with max. 47 mm anatomical length with two pontics between the abutment
  crowns .
- Inlay bridges

New Basic Law of Dental Ceramics

The rule used to be that all-ceramic bridges were at best suitable for the anterior tooth region. Even the glass-infiltrated aluminium oxide frameworks suitable in terms of their bending strength did not withstand the masticatory loads in the posterior tooth region. The junctions of pontics in particular were at considerable risk of fracture. But the rules have changed in your favour. With zirconium oxide, there is now an alternative that is three times better than glass-infiltrated ceramics in terms of its fatigue properties and which has already proven its wonderful suitability in clinical studies.



Natural Colour and Shape

As the term “all-ceramic” already suggests, Cercon smart ceramics requires no metal framework. This offers a great advantage for your restoration’s aesthetics, because the milled zirconium oxide substructure is white in colour. The milled unit is further modelled using Cercon ceram veneering porcelain to blend with the existing adjacent teeth in your mouth in both shape and colour, giving the restoration its very natural appearance.

With the additional advantage of having maximum stability thanks to its strength in thin sections, Cercon restorations can be well integrated to follow the natural contours of your mouth. Together with your natural teeth, a harmonious overall appearance can be achieved that makes as good an impression as your own teeth.

All the facts on Cercon smart ceramics for you at a glance
Improved Aesthetics


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Due to the white zirconium oxide milled substructure

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Thanks to the specially developed veneering porcelain Cercon ceram S

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Optimal shade match to the existing natural teeth

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Can be contoured to blend with the natural dentition

Compatibility


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Verified by the medical application of zirconium oxide for about 20 years

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No allergic reactions reported in the published literature

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No interaction with other dental materials

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Good insulating behavior of the ceramic against cold/warm influences

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Thanks to a smooth ceramic surface that supports good oral hygiene

Durability


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Thanks to the exceptional strength of zirconium oxide

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High stability requiring minimum framework dimensions


Strong, attractive and compatible:
You expect the best

There are not many materials, such as natural diamond, which combine exceptional beauty and strength. In dentistry, there has been continuous research and development to find materials suitable for dental prosthesis that are aesthetically acceptable, of sufficient strength and which are perfectly tolerated by the human body. For many years ceramic materials combined with metals have been used in dental restorations, ceramic to achieve the desired aesthetics, metal for strength.

A high-tech ceramic, Zirconium Oxide, is now available and has already been proven in many extreme situations such as heat shields in the Space Shuttle, brake disks for sports cars and the spherical heads of artificial hip joints. This high-tech ceramic has the potential to give prosthetic care a whole new image, because thanks to Cercon smart ceramics it can now be used in dentistry.

With the Cercon system, all-ceramic crowns and bridges of up to four units can be made in the incisal and molar regions. In individual cases, depending on the gap of the bridged teeth, even bridges of up to six units are possible. Additional dental applications are already in the testing phase and are just awaiting test results.

Veneer

A veneer is a thin layer of restorative material placed over a tooth surface, either to improve the esthetics of a tooth, or to restore a damaged tooth surface. Materials used for veneers may include composite and porcelain. In some cases, removal of tooth structure is needed to provide sufficient space for the veneer, whereas sometimes a restoration may be bonded to a tooth without preparation of the tooth

 

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