Porcelain crowns (covers) and bridge restorations.
By placing restorations on teeth, our aim is to repair function lost, esthetic and tooth related speech disorders.
With dental dentures we repair not only nutritional disorders and health problems but also help patients who have missing or worn out teeth, but also regaining self-confidence and improving their psychological condition.
Like other parts of our body, our aging processes also influence our teeth. With old age, dental fractures, cracks, discoloration, abrasions due to Para functional habits and gum diseases occur and they cause destructions in teeth in varying degrees. Also, mechanical traumas and decays result in material loss in teeth. In such cases, restorations to replace missing teeth are called crowns.
For veneer restorations, porcelain material is used. Porcelains are restorations gained by backing of ceramic dusts at high temperatures. By using this backing procedure, ceramic gains color and characteristic similar to tooth enamel. Porcelain veneers keep their color and shape stable for many years.
- In which cases are the crown restorations used?
Excessive loss material in teeth due to decay, trauma or other causes.
Discoloration of the teeth
Deformation of the teeth
In filling the gap between teeth
In the presence of large fillings
Filling gaps formed after gum surgery.
- What are bridge restorations?
Restorations using neighboring teeth are called bridge prosthesis.
- What happens if bridge prosthesis is not applied?
Teeth surrounding the missing tooth gap may align this gap over time. Teeth on the opposite jaw tend to move towards this gap. If these gaps are kept untreated, they narrow due to abnormal movements of the teeth. Moreover, as a consequence of distorted chewing statics, articular problems and increased and tooth loss may occur.
- How are the crowns and bridge restorations build-up?
Before these restorations, some preparations on your teeth are necessary. The degree of preparation is depending on the amount of material to be used. For non-metal based ceramic applications, using porcelain as a substructure allows less preparation on the teeth.
Having the preparation done, temporary restorations are used in order to allow patient to continue his/her normal daily life.
By taking patient’s preferences into consideration, the most suitable tooth color is decided.
Restorations are build-up according to sizes measured and a trial practice is made.
Restorations are first reviewed by both dentist and patient in terms of esthetic and functional considerations and then adhered to teeth by appropriate cement.
- What materials are used in crown and bridge restorations?
Fixed dentures are in service of dentistry for a very long time. The most commonly used form is the combination of metal and porcelain materials. With technological developments and increased esthetical demands, porcelain based restorations without metal support became popular.
- What kind of metals are used for metal based crown and bridge restorations?
Invaluable metal alloy
These kinds of metals are strong materials that are compatible with porcelain which have been used successfully for many years. They are quite biocompatible and can be used with any restorations.
Valuable metal alloys
These are gold based, biocompatible and strong materials developed for dentistry. Gold is a noble metal and its biocompatibility perfect with tooth and gum. When used as a porcelain substructure, it can be attached to the tooth underneath and porcelain, which is a very sensitive manner. Compared to invaluable alloys, more esthetical results are achieved due to the color of gold.
- How are the crowns and bridge restorations without metal supported?
While function did matter in previous dental treatments, currently esthetical approach is coming into practice. With developing technologies, ceramic replaced metals as substructures in crown and bridge restorations.
The biggest disadvantage of metal-based restorations is that metal reflects the light from the porcelain and that maximum esthetic look was not achievable. Especially gray reflection on the neck of teeth gave undesirable results. But, with developments in ceramic structures, porcelain substructures allowed us to build-up restorations without metal support, which are both esthetic and biocompatible.
Especially transmittance of light through porcelain and its processing by layers increased the esthetic success.
There is no opaque and pale appearance like metal-based porcelains. Since there will be no margin for metal, it is possible to build up thinner restorations which leads to less dental material loss.
- Which material is used most often as a non-metal substructure?
The material that is mostly used in non-metal bridges is zirconium.
It’s quite esthetic, strong and biocompatible. These restorations are completely build-up by a computer-aided program in laboratories and their compatibility with the tooth structure is perfect. Measurements taken from the patients are transferred to the computer after scanning with special instruments.
The restoration is completed with special porcelain placed on the substructure designed by the computer.
- Can bridge restorations be build-up by zirconium?
Nowadays, developed zirconium technology makes it possible to build-up long bridges from Zirconium.