What Causes a Dental Crown to Break?

Dental crowns are commonly used to restore damaged teeth and help them function like new ones. While crowns are durable, they are not invincible, and there are several reasons why a dental crown might break. Understanding these causes can help you take better care of your crown and avoid unnecessary problems.

Poor Fit or Installation

One of the most common reasons a dental crown might break is if it does not fit properly. When a crown is poorly fitted, it can put pressure on certain areas of the tooth and cause the crown to crack or chip. A crown should fit snugly and comfortably, matching the shape of the natural tooth it is covering. If the crown is too loose or too tight, it can lead to stress on the material, making it more likely to break.

Biting Hard Objects

While dental crowns are strong, they are not immune to damage from biting down on hard objects. Crunching on ice, biting nails, or chewing on hard candies can put too much pressure on a crown, causing it to fracture. It's important to avoid habits like these to protect your dental work and keep your crowns intact.

Teeth Grinding (Bruxism)

Many people unknowingly grind their teeth at night or clench their jaws during the day. This condition, known as bruxism, can put excessive force on your crowns, leading to cracks or breakage over time. If you suspect that you grind your teeth, it's worth discussing with your dentist, as they can recommend a mouthguard to protect your crowns and natural teeth.

Age of the Crown

Dental crowns are not meant to last forever. Over time, the materials used to create crowns—whether porcelain, metal, or ceramic—can wear down. The adhesive that holds the crown in place can also weaken. As a result, an older crown may be more prone to breaking. Regular checkups with your dentist can help ensure that your crown is still in good condition and functioning well.

Infection or Tooth Decay Underneath the Crown

A dental crown is designed to cover a tooth that has been treated for damage or decay. If there is decay or infection underneath the crown, it can weaken the tooth, causing the crown to break or loosen. This is why it is important to maintain good oral hygiene and see your dentist regularly for cleanings and checkups. If decay is found underneath the crown, it may need to be replaced.

Trauma or Injury

Accidents happen, and sometimes, a sudden blow to the mouth can cause a crown to break. Whether it's from a sports injury, a car accident, or a fall, trauma can cause enough force to damage a crown, especially if it's already weakened by other factors. Wearing a mouthguard while playing contact sports or in risky situations can help protect your dental work from damage.

Poor Oral Hygiene

Good oral hygiene is crucial for the long-term health of your teeth and crowns. If you neglect brushing and flossing, plaque and bacteria can build up around the edges of the crown, causing damage to both the crown and the tooth underneath. Over time, this can lead to infections, decay, or even the need for a new crown.

Material Wear and Tear

Different types of crowns are made from different materials, such as porcelain, ceramic, or metal. Porcelain crowns, while natural-looking, may not be as strong as metal crowns and are more likely to chip or crack if exposed to excessive force. Ceramic crowns can be more durable but may still wear down over time. It's important to know the type of crown you have and follow your dentist's recommendations for care.

Summary

Dental crowns are essential for restoring the function and appearance of damaged teeth, but like anything, they can break under certain conditions. Poor fit, biting hard objects, teeth grinding, age, infection, trauma, poor oral hygiene, and the material of the crown itself can all contribute to a crown breaking. By understanding these factors and taking preventive measures, you can help ensure your crown stays in good condition for many years. If your crown breaks or shows signs of damage, consult your dentist for advice on the next steps. Keep in mind that the dental crown cost can vary depending on the material and your location, but preventing damage through good habits can save you money in the long run.