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How Long Can I Expect My Dental Crown To Last?

People often assume that once they have a crown placed on a tooth, it will last the rest of their lives. Although dental crowns may last for a very long time, it is not correct to say that they will last forever.

How Long Do Dental Crowns Last?

This is one of the most difficult questions asked of a dentist because, in essence, no one can be sure. However, there are a few resources available that can give us an idea of how long your dental crowns may last.

One resource is insurance companies. Even though the dental insurance company should not dictate the type of treatment that should be done, they give some insight into the matter. Insurance companies will pay for a new crown on the same tooth after five years. So, in essence, they believe that dental crowns will last at least five years. Another resource available is the dental literature. The dental research has some extreme variability in this area. It provides information that ranges from a 20% failure rate in 3 years all the way to a 3% failure rate in 23 years. So, which is correct? The answer actually has to be looked at on a case-by-case basis. To do this, we need to look at why dental crowns have to be replaced.

Why Do Dental Crowns Need to Be Redone?

There are many reasons why dental crowns need to be redone. Fracture is one example. The fracture incidence of dental crowns can be related to either the type of restoration (gold, metal ceramic, all-ceramic) or where the tooth restoration is placed in the mouth (anterior vs. posterior). Another risk factor is if a person has a grinding habit at night. A crown will have a higher risk of fracture in a mouth that applies more forces to the teeth by grinding than in one that does not have any incidence of grinding.

Decay can be another reason why dental crowns need to be replaced. Just because a tooth receives a crown does not mean it is less prone to decay. In fact, because it has more areas that may trap plaque, it needs to be cleaned as well, if not more meticulously, during home care.

Esthetics can be another reason why dental crowns are replaced. Esthetics is one of the main reasons people choose to have a new crown made in the anterior part of the mouth. This occurs because as we get older, our teeth will change color and progressively get darker while the tooth with the crown will stay the same color as the day it was placed. A discrepancy between the color of the teeth will become more evident over time. In addition to color, esthetic changes in the position of the gum tissue over time can also affect the look of the crown.

Which one of these areas may be a factor in a patient's mouth is uncertain. An idea can be obtained by evaluating the reason a crown was needed in the first place (such as a fractured tooth, decay, etc.). In conclusion, it is unclear how long dental crowns will last. Their life span may be anywhere from a few years all the way to 20 years and beyond. A lot of it will depend on the need for the crown in the first place and how well the mouth is taken care of after the crown is placed.

By Greggory Kinzer, DDS, MSD

Considering Porcelain Veneers?

Maybe you've thought about cosmetic dental work - but felt a little vain to consider it.

Or the appearance of your teeth never bothered you much, because your dental health is pretty good.

But fixing a small functional problem can sometimes yield wonderful, unanticipated dividends. Mary, for instance, had a few dental imperfections most of us could live with. But she was hampered from time to time by a lispy "s" sound.

Mary had gapped teeth, a diastema, which caused a slight but noticeable speech defect. She also showed evidence of life in the fast lane, too: teeth worn down, probably from nervous clenching of the jaw muscles or grinding teeth.

In Mary's case - and every case is different - porcelain veneers saved the day. Her cosmetic dentist began with a functional and esthetic evaluation to determine what shape and contour would best solve Mary's diastema problem. More tooth length was proposed, to give her a more youthful, proportioned appearance, too.

Impressions were taken, and sent off to the lab for fabrication. On the next visit, her teeth were cleaned and etched chemically, the dental veneers were cemented into place, and "cured" with a special light to seal them.

Mary's speech problem evaporated. Dentistry fixed that. But cosmetic dentistry did more than perfect her speech.

WHEN FUNCTION = BEAUTY

Like an acrylic fingernail, veneers cover the front surface of the teeth. Porcelain dental veneers are strong and, by the way, look great.

As an architect of more that 60 years, I have learned that only the beautiful is practical. And universally, anything that is truly practical, functional, and useful is beautiful.
-Frank Lloyd Wright