Why does my dental crown keep coming off

Having a dental crown come off can be frustrating and inconvenient. Not only does it create discomfort and affect your ability to fully enjoy your meals, but it also raises concerns about the quality of the dental work and the need for additional visits to the dentist. In this article, we will explore the possible reasons why your dental crown keeps coming off and discuss ways to prevent it from happening. Let's dive right in!

Poor fitting

One of the most common reasons why a dental crown may keep coming off is a poor fit. If the crown does not fit snugly onto your tooth, it is more likely to become loose and eventually fall out. Poor fitting can occur due to several factors:

1. Inadequate preparation: Insufficient tooth preparation prior to crown placement can lead to improper fit. It is essential for your dentist to remove a sufficient amount of the tooth structure to accommodate the crown accurately.

2. Improper impression: A poorly taken impression can result in a crown that does not fit properly. The impression needs to capture an accurate mold of your tooth to ensure a precise fit of the crown.

3. Temporary crown issues: Temporary crowns are meant to protect the prepared tooth until the permanent crown is ready. If the temporary crown is not correctly placed or comes off prematurely, it can affect the fit of the final crown.

4. Aging or damaged crown: Over time, the cement holding the crown in place can weaken, leading to a loose crown. Additionally, if the crown gets damaged or cracked, it may no longer fit tightly on the tooth.

Poor oral hygiene

Another significant factor that can contribute to a dental crown coming off is poor oral hygiene. Neglecting proper oral care can lead to various dental problems, including gum disease and tooth decay. These issues can weaken the supporting structures of the crown, making it more prone to loosening or falling off.

1. Gum disease: If you have gum disease, also known as periodontal disease, the supporting tissues around your teeth may get damaged. As a result, the crown loses its stability and may eventually come off.

2. Tooth decay: Tooth decay can affect the underlying tooth structure supporting the crown. Weakened tooth structure compromises the crown's stability, increasing the chance of it detaching from the tooth.

3. Plaque buildup: Inadequate brushing and flossing can lead to a buildup of plaque around the crown margins. Excessive plaque accumulation can cause gum inflammation, which weakens the crown's support and may cause it to dislodge.

4. Teeth grinding: If you have a habit of grinding or clenching your teeth (bruxism), it can put excessive pressure on the crown, increasing the likelihood of it coming off. A nightguard or splint may be recommended to prevent crown dislodgement in such cases.

Poor crown material or placement

The choice of crown material and the expertise of your dentist can influence the longevity of your dental crown. Here are some factors related to crown material and placement that can contribute to crown dislodgement:

1. Type of crown material: Different crown materials have varying strengths and adhesive properties. Porcelain-fused-to-metal (PFM) crowns and all-ceramic crowns are commonly used due to their aesthetics, but they may be more prone to fracture or debonding compared to metal crowns.

2. Improper cementation: The technique used to bond the crown to the tooth is crucial. If the cement is not properly mixed, applied, and cured, it may not create a strong bond, leading to crown instability.

3. Insufficient tooth reduction: Adequate tooth reduction is necessary to accommodate the crown's thickness. If the dentist fails to remove enough tooth structure, it can compromise the crown's stability and retention.

4. Bite problems: An incorrect bite alignment can lead to excessive forces being applied to the crown during chewing. Over time, this can weaken the cement or cause fractures, resulting in crown dislodgement.

Prevention and remedies

Now that we have explored the various causes of dental crown dislodgement, let's discuss some preventive measures and remedies:

1. Choose a skilled dentist: Finding a qualified and experienced dentist is crucial for ensuring proper crown placement. A skilled dentist will accurately prepare the tooth, take precise impressions, and use appropriate materials and techniques to prevent crown issues.

2. Maintain good oral hygiene: Brush your teeth twice a day with a soft-bristle toothbrush and fluoride toothpaste. Floss daily to remove plaque and debris from between your teeth. Regular dental check-ups and professional cleanings are also essential to maintain a healthy mouth.

3. Be cautious with your crown: Avoid biting on hard objects, such as ice or nuts, to prevent damage to your crown. If you grind your teeth, talk to your dentist about a custom-made nightguard to protect your crown from excessive forces.

4. Seek prompt dental care: If you notice any signs of a loose or dislodged crown, contact your dentist immediately. They will evaluate the situation and determine the most appropriate course of action, which may involve recementing the crown or fabricating a new one if necessary.

FAQs

1. How much does a dental crown cost?

The cost of a dental crown can vary depending on several factors, such as the material used and the location of the dental practice. On average, the cost ranges from $800 to $2,500 per crown.

2. Can I glue my dental crown back on at home?

No, it is not recommended to glue your dental crown back on at home. Dental cement used for tooth restorations requires professional application. Gluing the crown at home can lead to ill-fitting and potential complications.

3. How long does a dental crown usually last?

The lifespan of a dental crown depends on various factors, including oral hygiene practices, bite forces, and the crown material. On average, a well-maintained dental crown can last between 10 to 15 years.