Zirconia vs. Emax kronen

Tandheelkundig toerisme Tandheelkundig toerisme

13 mei 2019

Zirconia vs. Emax kronen

The first thing a patient should know is when a dental crown should be used by a dentist. Dental crowns are used in situations where the teeth are weak, worn and possibly broken or fractured. These are all situations where a dentist would use a dental crown.

Crowns have been around for a very long time. Because of advances in technology, the process has been streamlined down to other types of restorations such as onlays and emax restorations. When a dentist decides to use a dental crown, it is for the specific reason of trying to re-strengthen a tooth that is very weak. The dentist is aiming for long term success with the tooth.


Emax is a specific type of porcelain called lithium disilicate and it is basically a block of porcelain. Because it is a block of porcelain as opposed to one that the ceramic artist or dental technician creates by hand, the block increases the strength factor of the material. Lithium disilicate is hard porcelain to begin with and that allows for its inherent strength to be kept with the restoration. With emax, there is no core material that needs to stay with this material because all the strength is built within the porcelain. EMax can be used as a core material whereby porcelain can be layered on the surface to increase the esthetic value of restoration for anterior eMax resto


Zirconia is an interesting type of crown that has been used for the past eight to ten years continues to be used today. Most people know the phrase “cubic zirconia.” It is like a diamond substitute used in jewelry. The material used by dentists is not in the cubic form. It is in a form known as a tetragonal form that still has the hardness of zirconia but can be manipulated and used as a core material for dentistry. Instead of having to use metal as a core material for the strength of the crown, dentists are able to have a white material such as the zirconia. This material gets away from the metal aspect of dentistry. Since zirconia is a very hard substance, it is able to withstand a lot of the pressures caused by chewing.

Pure zirconia can be used as a crown and many dentists use this under the brand name “BruxZir crowns”. BruxZir crowns are primarily for people who have a lot of strength in their bite. People who do a lot of bruxing (teeth grinding or clenching) are in need of some material that is extremely strong. Pure zirconia crowns are very popular for that type of situation because these patients could break up restorations (including emax restorations) with their grinding and clenching. They are in need of extreme strength with these restorations. In the past, all these patients could use was metal on the surface. However, patients do not want to see metal now and that is why pure zirconia crowns are very popular. Patients are able to have something white back there instead of something that is gold.


Zirkoonoxide en Emax kan worden gebruikt op de voortanden. Echter kan zirkoniumoxide niet worden gebruikt als fineer materiaal. Het kan alleen worden gebruikt als een kroon materiaal. Het enige ding zirconia die nog wordt onderzocht is zijn vermogen te binden aan tandstructuur. Er zijn mensen die zeggen zirconia kan worden gebonden aan de tanden, maar er is niet genoeg bewijs. Emax kan worden gebruikt als een fineer vorm en kan een heel mooi restauratie zijn bij het correct gedaan.

Zirkoonoxide en Emax kan zowel op voortanden maar zirkoniumoxide moet in een kroon vorm. Zirconia moet een micromechanische retentie fit op de tand die moet worden in de vorm van een kroon te hebben. Van daaruit kan de tandarts cement op de zirconia restauratie.

De keuze van welke u wilt gebruiken, hangt af van de individuele patiënt en de sterkte factoren. Als een tand is redelijk sterk en een patiënt niet over een super harde beet, zou Emax restauraties waarschijnlijk de beste manier om te gaan voor de beste kracht en schoonheid zijn.

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