5 Reasons Your Dental Crown Came Loose

What Could Cause Your Crown To Fall Off?
27 March 2017

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It can be both painful and unsettling to have a crown come loose or fall out due to age, especially if it exposes the tooth dentin that is sensitive to hot and cold foods. This could constitute a dental emergency depending on the severity of the pain, so it is important that you visit your dentist as soon as your crown falls off. But why would the dental crown fall off? Below are some common explanations.

  1. Tooth Decay

    The crown itself is not prone to tooth decay, but the natural tooth underneath is. The decay usually forms near the gumline at the point where the crown meets the natural tooth. Depending on the severity of the decay, your dentist may choose to save the crown or replace it. Still, the decay must be removed and the resulting cavity filled. If the crown is in good condition, it can be replaced on the tooth, or a new crown can be made.

  2. You Consumed Too Many Sticky Items

    Sticky foods are generally harmful to restored or replaced teeth. Eating too many chewy foods such as toffees can cause the crown to loosen gradually until it eventually falls off. Fortunately, the damage can be easily fixed by simply sticking the crown back on the tooth with cement.

  3. The Cement Bonding the Crown to the Tooth Weakened

    The crown is made from hard materials that can tolerate years of biting and chewing forces. However, the cement holding it to your teeth is a weak point that can cause the crown to come loose over time, and ultimately fall off. This problem can be fixed by cementing the crown back onto the tooth.

  4. Weakened Natural Tooth Structure

    Crowns are typically placed teeth that have already been heavily damaged due to tooth decay, fracture, or previous fillings.. In addition, preparing a tooth for the crown removes additional tooth structure. If the capped tooth is severely worn down, such that there isn’t enough space for the crown to be properly cemented, then the crown may not last as long as it should.

  5. Breakage of the Crown Due to Trauma or Heavy Grinding or Clenching

    As strong as the crown material may be, it is also susceptible to excessive forces that can break it and cause it to fall off the tooth. Usually, the damage starts with a small crack that gradually extends until the crown weakens enough to fall off.

    To avoid problems with either the crown or the underlying tooth that may lead to dental crown treatment, it is important that you take good care of your teeth, restorations, or replacements. Habits such as chewing on ice, biting your nails, opening bottles with your teeth, and grinding or clenching your teeth can also cause the crown to come loose or fall off. So, avoid such behaviours and talk to your dentist about wearing a night guard.

Proper at-home dental care and regular check-ups can help to identify any problems with your teeth or restorations before they become emergencies. For professional advice on how to care for your dental crowns or other restorations, please contact our office to schedule a meeting with the dentist.

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