Dental Crowns and Bridges Dental bridges and in the case of excessive tooth damage dental crowns are the correct choice where implants are not suitable or preferred for dental cavities after tooth loss; in order to correct the smile and replace the lost function.
When a tooth loss occurs due to any reason, the adjacent teeth start to move towards this cavity. As a result, gingival problems in adjacent teet and bone loss related to tipping in this cavity, create, deterioration in aesthetics and changes in chewing forces. If the gap is not restored with an implant or bridge, the jaw bone in the extracted tooth region will begin to be eroded over the years. This can also cause problems in neighboring teeth.
Crowns and bridges are divided into two types in general:
Metal Supported Crowns And Bridges
These are prostheses which the first layer that surrounds the teeth consist a metal substrate .
A second layer is added by processing porcelain on the metal and this metal is covered during the final application.
Full Porcelain (Non-metal) Crowns
These are crowns in which all layers are made out of porcelain. Porcelain crowns without metal support (full porcelain) have greater depth and viability due to their light transmission properties, thus achieving results closest to the natural tooth.
What are the advantages of full porcelain crowns over metal supported crowns?
While full porcelains create a very similar aesthetic look to natural tooth structure as they transmit light, even if they are made very well, metal porcelains have an opacity and artificiality. For this reason, full porcelain crowns are preferred especially for anterior teeth.
Metal supported porcelains are mechanically bonded to the teeth. Whereas full porcelains are bonded to the teeth mechanically and chemically. Therefore, the retention is much higher than the crowns with metal supports.
Since there is no metal in the structure of full porcelain crowns, there is no dark line at the crown-gum level. A more aesthetic look is provided.
When the gingiva recedes, full porcelain retains its aesthetic appearance, while metal porcelain creates a bad appearance in the area where it joins the tooth.
There is no risk for possible allergies for some metals (nickel, etc.) in full porcelain crowns that are used in the basis.
Zirconium Based Bridges without metal support
In this system, instead of metal, a white alloy called zirconium , is used as the substructure. This state-of-the-art substructure is the only material capable of offering aesthetics and durability at the same time. The biggest advantage of the system is that it is reliable on bridges at the back region thanks to its high strength .
Crowns with zirconium substructures, apart from preventing gingival problems and allergies, because of its light transmission feature it provides the closest aesthetic and functionality to natural teeth.
In which Cases Can Zirconium Teeth Be Applied?
- Excessive loss of teeth (eg. very large fillings)
- Bridge restorations in missing teeth
- Aesthetic restorations in the anterior region
- Patients with metal allergies
- Over implant restorations
What is E-max?
Porcelain laminate is a type of ceramic formed from compressed glass particles. E-max is the application of the same material as dental veneers. It can be applied in advanced laboratories and clinics since it requires high level technical competence.
E-max vaneers are more aesthetic than zirconium vaneers. Because zirconium vaneers have a bottom layer and a top layer, as zirconium and porcelain. In contrast, E-max is composed of a single porcelain layer. When this is applied this makes the tooth look more aesthetic.
E-max vaneers are more aesthetic and durable when applied on a single tooth. It adheres to the tooth better. However, since they cannot be used in bridge treatments, zirconium vaneers give the best results in bridge applications.
E-max coatings are the best treatment in the appropriate cases.
How are crown and bridge restorations performed?
In such restorations, we need to make a certain amount of minimisation in the teeth that will support. This minimisation is determined by the material of the treatment we plan to perform. Crowns without metal support require less preparation (cut) than metal supported crowns.
After the preparation, the patient is given temporary crowns, which will allow him/her to continue normal life easily.
Restoration is prepared in the laboratory according to the measurements taken and rehearsals are made. During the rehearsals, the teeth are analyzed for shape, size, color and gingival compatibility and the necessary controls are provided. The controlled restorations are polished in special ovens and adhered to the teeth with special cement. The average duration of treatment is 5-7 days.