They are made of profoundly biocompatible materials and cause no response to the encompassing tissues, empowering the gums to shape around them as though they were normal teeth. Metal-Free crowns have incomparable quality and strength.
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.
As with everything in life, all these benefits come with a price. They are more expensive than PFM Crowns. Also, Zirconia is very tough, which is good until you consider the abrasive effect of the material against the other teeth.
When the manufactures boast that their products are guaranteed for a long time (10 yrs warranty certificate on copings) that again, seem like a good thing, until you realize, it’s often decay underneath the crown that causes the crown to fail, not the crown itself.
