How Long Do Dental Crowns Last? Factors That Affect Lifespan

A dental crown is an investment in your tooth’s future. When Dr. Bonin recommends a crown, you want to know that the restoration will be durable and long-lasting. The lifespan of a crown varies considerably, but understanding the factors that influence how long a crown lasts can help you make choices that maximize the life of your restoration.

On average, a well-made crown can last ten to fifteen years or longer. Some crowns last twenty years or more, while others need replacement sooner. The difference often comes down to the materials used, the quality of the preparation and placement, and most importantly, how well you care for your crowned tooth.

The Role of Crown Material

The material used to make your crown significantly influences how long it will last. Modern crowns are made from several different materials, each with its own strengths and longevity profile.

Porcelain or ceramic crowns are highly aesthetic and can match your natural tooth color precisely. They are strong and durable, and with proper care they can last twelve to fifteen years or longer. Ceramic is resistant to staining, which means it will not discolor over time the way some other materials can. All-ceramic crowns are an excellent choice for front teeth where appearance is important, and they work well on back teeth too if your bite is not excessively heavy.

Porcelain-fused-to-metal crowns combine the aesthetics of porcelain with the strength of a metal substructure. These crowns can be very durable and often last ten to fifteen years or longer. The metal underneath provides exceptional strength, making these crowns suitable for any tooth in the mouth. A potential drawback is that over time, the margin between the porcelain and metal can become visible as your gum recedes, revealing a dark line at the base of the crown.

All-metal crowns, typically made from gold alloy or other metals, are extremely durable and strong. Metal crowns can last twenty years or longer if cared for properly. They are ideal for back molars where they are not visible and where their exceptional strength is most valuable. The obvious aesthetic downside is that they are visibly metallic and do not match your natural tooth color, so they are rarely used on front teeth except in specific situations.

Zirconia crowns are a newer option that offers excellent strength and aesthetics. Zirconia is highly durable, stain-resistant, and very biocompatible. Some evidence suggests zirconia crowns may rival or exceed the longevity of traditional porcelain crowns.

The Quality of Preparation and Placement

How well your dentist prepares your tooth and places your crown influences the crown’s longevity. A tooth that is properly shaped and prepared, with margins that are precisely located and smoothly finished, provides an optimal foundation for a crown. Poor preparation, rough margins, or inadequate support can lead to crown failure.

Similarly, the way the crown is cemented is critical. If the crown is not seated properly or if excess cement is left beneath the crown margin, it can lead to decay underneath the crown, ultimately causing crown failure. Dr. Bonin’s attention to detail during preparation and placement ensures your crown has the best possible foundation for long-term success.

Your Bite and Chewing Habits

The forces placed on your crown every time you chew influence how long it lasts. If you have a gentle bite and chew carefully, your crowns will likely last longer. If you generate significant bite force, clench or grind your teeth, or have a habit of chewing on hard objects like ice or hard candy, your crowns will face more stress.

Some people naturally apply more force when chewing than others do. This is partly anatomical and partly habitual. If you are a heavy chewer or if you grind your teeth, your crowns will experience more stress and may need replacement sooner than average.

Chewing hard, sticky, or crunchy foods accelerates wear on crowns. Biting down on extremely hard objects can crack or break a crown. On top of that, chewing sticky foods like caramels or taffy can dislodge a crown from the tooth underneath.

Oral Hygiene and Decay Prevention

A crowned tooth is not immune to decay. If bacteria and food particles accumulate at the margin of the crown where it meets the tooth, decay can develop underneath the crown. This decay gradually eats away at the tooth structure beneath the crown, eventually compromising the tooth and the crown’s longevity.

Meticulous oral hygiene is essential to prevent decay around and under a crowned tooth. You should brush at least twice daily and floss daily, paying special attention to the area where the crown meets your gum line. An electric toothbrush can be particularly helpful for cleaning around crowns.

Regular dental visits allow Dr. Bonin to examine your crowned tooth and detect any early signs of decay or crown failure. Professional cleanings also help prevent decay by removing calculus and plaque buildup.

The Underlying Tooth’s Health

The health of the tooth underneath the crown influences how long the crown will last. If the tooth structure beneath the crown is strong and healthy, the crown can be supported well. If the underlying tooth is compromised by previous decay, cracks, or root canals, it may not support the crown long-term, or it may fail and require extraction despite having a healthy crown on top.

A tooth that has undergone root canal treatment has lost its nerve and blood supply and becomes more brittle. These teeth are more prone to cracking under stress. If a significant crack develops in a root-treated tooth, the tooth may be lost even if the crown is still intact.

Approximately ten percent of crowned teeth eventually require root canal treatment because decay or other problems develop in the tooth beneath the crown. This does not mean the crown has failed; rather, the tooth underneath has developed a problem. The crown can sometimes remain in place after root canal treatment and continue to function normally.

Gum Health and Recession

Your gum health affects your crown’s longevity. Gum disease causes the gum tissue to recede, exposing the root surface of the tooth beneath the crown. This exposed area is more vulnerable to decay. On top of that, gum recession can expose the margin of the crown, which is often considered aesthetically undesirable, especially on front teeth.

Maintaining excellent oral hygiene and preventing gum disease helps your crowned tooth stay healthy long-term. Regular professional cleanings and periodontal care are essential if you have any gum issues.

When to Expect Crown Replacement

Eventually, all crowns will need replacement. The question is not if but when. Most patients receive a new crown every ten to fifteen years, though some people have crowns that last twenty years or more.

If your crown shows signs of failure, such as a crack, a gap between the crown and tooth, or discomfort, it should be evaluated and likely replaced. Waiting too long to replace a failing crown can allow decay or other problems to develop in the tooth underneath.

Maximizing Your Crown’s Lifespan

To help your crown last as long as possible, practice excellent oral hygiene. Brush twice daily, floss daily, and visit Bonin Dental Care regularly. Avoid chewing on hard objects like ice, hard candy, or pens. Be mindful of very sticky foods that can dislodge a crown.

If you grind or clench your teeth, discuss this with Dr. Bonin. A night guard can protect your crowns from excessive force while you sleep.

Avoid smoking, which can contribute to gum disease and tooth loss. Limit acidic beverages, which can erode the cement that holds the crown and eventually affect the underlying tooth.

The Long-Term Investment

A crown is an investment in your tooth’s future. While crowns do eventually need replacement, each crown gives you many years or even decades of reliable function. Treating your crowned tooth with care and maintaining excellent oral hygiene will maximize the time before replacement is necessary.

If you have a crowned tooth that concerns you, or if you are considering crown treatment, contact Bonin Dental Care in Windsor for an evaluation and discussion of what to expect. Dr. Bonin can assess your specific situation and set realistic expectations for crown longevity based on your individual factors.