ZIRCONIA CROWNS
What You Need to Know About Dental Crowns Made from Zirconia
Dental crowns are caps that cover a tooth or a dental implant. Dentists often recommend crowns as a way to support broken, weak, or misshapen teeth.
Dental crowns can also be used to cover up a tooth that’s very worn down or severely discolored. They can also be used in conjunction with bridges to strengthen multiple teeth.
When it comes to the materials that crowns are made of, you have several possible options, including ceramic and metal. Another option that’s now available for some people is a zirconia crown.
Zirconia crowns are made from zirconium dioxide, a very durable type of metal that’s related to titanium, although it’s categorized as a type of ceramic crown
Zirconia dental crown benefits
Crowns made of zirconia are becoming increasingly common, and they do offer some advantages.
Strength
One of the biggest advantages of zirconia is its strength and durability. Consider how much force your back teeth exert on the food that you chew.
Your crowns need to be made of a strong material, so zirconia may be a good choice for crowns in the back of your mouth. Also, because zirconia is so strong, a dentist won’t have to do as much preparation of your tooth.
Longevity
Zirconia-based crowns fared just as well over the course of 5 years as metal-based crowns, according to a 2017 randomized controlled trial published in the Journal of Dentistry. And crowns made of zirconia, called monolithic zirconia crowns, are especially durable.
Biocompatibility
Zirconia is the choice of many dentists for its biocompatibility, which means it’s less likely to provoke the body into producing a reaction or immunological response like inflammation.
Same-day procedure
Many dentists can make zirconia crowns in their offices rather than sending an impression of your tooth to a lab to have a crown made. Then, they can cement the crown into your mouth in a single visit.
The CEREC, or Chairside Economical Restoration of Esthetic Ceramics, process uses computer-aided design/computer-aided manufacturing (CAD/CAM) technology to speed up this process. The dentist uses a dental milling machine to actually make the crown from a block of zirconia.
This process eliminates the need to stretch the procedure into two visits. However, not every dentist office has this technology in-house or offers zirconia crowns.
Other types of dental crowns
Of course, zirconia crowns aren’t your only option. Other materials commonly used in crowns include:
- ceramic
- porcelain
- metal
- composite resin
- combinations of materials, such as porcelain-fused-to-metal (PFM)
You’ll want to discuss the best material for your situation with your dentist. This will include how much of your natural tooth remains, the location and function of the tooth that needs the crown, the amount of gum that’ll show when you smile or talk, and the color of your surrounding teeth.
interesting facts about zirconia and porcelain fused to metal crowns
Next to all-ceramic crowns, the PFM crowns resemble the natural teeth most. They do differ in the sense that they are almost non-transparent but appear very similar to natural teeth because they imitate the way that light passes through and is reflected in the natural crown. It may just lack the natural lustrous look because the opaque porcelain coating needed to hide the color of the metal only leaves little room for a layer of translucent porcelain.
- Zirconia crowns have very little, if any, risk of hypersensitivity because they are resistant to hot and cold.
- Porcelain is resistant to stains and discoloration but the problem is that over time the gum tissue recedes and the metal margin is exposed. This creates a grayish line that does not look very aesthetically pleasing!
Dental crowns are becoming more and more common as people become more particular about their dental appearance. Porcelain fused with metal crowns and zirconia are both types of crowns that are suitable for the purpose.
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