ZIRCONIA

A zirconia crown is a popular type of all-ceramic crown which is worn to improve the appearance of a tooth which has become stained or disfigured over the years. They are durable, easy to wear and long lasting.
 
Plus zirconia crowns have a translucent appearance which means that they are indistinguishable from your own teeth. It is hard to spot a zirconia crown amongst natural teeth.
 

WHAT IS A ZIRCONIA CROWN?

This type of crown is made from Zirconia, a very strong material which is compatible with the human body.  Zirconia is used in many other medical applications such as artificial joints and is known for its strength and durability.
 
Zirconia is a type of crystal which is long lasting and indestructible.
 
Plus there is no fear about the body rejecting Zirconia or displaying an allergic reaction to it. It is safe to use and preferred by many people.
 

ADVANTAGES OF A ZIRCONIA CROWN

There are three advantages which are:
 
Strength: zirconia crowns last longer than other types of crowns.
 
Aesthetics: these crowns have an attractive translucent colour which blends in well with the other teeth.
 
Retain more of the existing tooth: minimal preparation is required which means more of the original tooth is preserved. This is useful if the crown needs to be removed.
 
So, a good choice if you are looking for a strong, long lasting and visually appealing crown. They are ideal at covering signs of damage or staining as well as helping to maintain the function of the tooth.
 

BENEFITS FOR THE PATIENT

Medical grade zirconia is completely biocompatible, and its metal-free substructure allows for beautiful esthetics. Flexural strength of the Nexxzr Sagemax is >1400 MPa.
 

PREP REQUIREMENTS

Anterior full-coverage crowns require a chamfer with 1.5 mm facial reduction, 1.5 mm lingual contact clearance, 1.5 mm incisal reduction 1.25 mm reduction at the gingival margin with rounded internal line angles; or a shoulder with 1.0 mm lingual reduction, 2.0 mm incisal reduction, 1.5 mm labial reduction, 1.0mm 360 degree rounded shoulder.
 
Posterior full-coverage crowns require a chamfer margin with 2.0 mm occlusal reduction, 1.5 mm buccal and lingual reduction with rounded internal line angles; or a shoulder with 2.0 mm occlusal reduction, 1.5 mm buccal and lingual reduction and 1.25 mm gingival margin reduction with rounded internal line angles. Chamfer Margins — Correct preparation of the chamfer margins interproximally allows the appropriate bulk of porcelain.
 

Recommended Cementation

Panavia 21
Glass ionomer cement (GC Fuji, GC America)
Resin Ionomer cement (RelyX, 3M ESPE)