Why Dental Crowns Don’t Make Teeth Immune to Decay

Dental crowns are a popular and effective solution for restoring damaged or weakened teeth. They provide protection and enhance the appearance of a tooth, but contrary to common belief, they do not make teeth immune to decay or other oral health issues. Understanding how bacteria can still affect a tooth under a crown is crucial for maintaining long-term dental health.

Can Teeth Rot Under a Dental Crown?

Yes, teeth covered with dental crowns can still decay. Crowns—often referred to as caps—offer significant protection, but they are not a foolproof barrier against bacteria. If proper oral hygiene is not maintained, bacteria can find their way under the crown and cause decay.

How Bacteria Invade a Crowned Tooth

Oral bacteria are persistent and can infiltrate areas that may seem well-protected. This can happen when:

• The crown is not properly sealed or fitted, leaving microscopic gaps where bacteria can enter.
• Poor oral hygiene allows plaque and bacteria to accumulate along the gum line and edges of the crown.
• The crown is damaged or worn out, exposing the underlying tooth to harmful bacteria.

Once bacteria access the area beneath the crown, they feed on sugars and release acids that erode enamel and lead to decay.

Why Teeth With Crowns Can Still Decay

1. Enamel Removal During Crown Placement

When a dentist prepares a tooth for a crown, a portion of the enamel is removed to ensure a proper fit. Since enamel is the strongest part of the tooth, this process makes the tooth more vulnerable. The crown serves as a replacement for enamel, but if it becomes compromised, the underlying tooth is at risk.

2. Poor Oral Hygiene Habits

Crowns do not require special cleaning techniques, but they do need the same level of care as natural teeth. If plaque is not removed through proper brushing and flossing, bacteria can infect the gums and seep under the crown.

3. Damage to the Crown

Over time, crowns can wear down or sustain damage from:

• Biting hard objects
• Teeth grinding (bruxism)
• Accidents or trauma

A damaged crown exposes the tooth underneath to bacteria and acids, increasing the risk of decay.

4. The Role of Saliva

Saliva helps neutralize acids and wash away bacteria. However, when a crown covers a tooth, the protective benefits of saliva are reduced. If bacteria get trapped under a damaged crown, the acids they produce stay in place for a prolonged time, accelerating decay.

How to Protect a Tooth Under a Crown

To prevent decay and maintain the health of a crowned tooth, follow these essential oral care tips:

1. Maintain Excellent Oral Hygiene

• Brush your teeth twice a day with fluoride toothpaste.
• Floss at least once daily, making sure to clean around the base of the crown.
• Use an antibacterial mouthwash to reduce plaque buildup.

2. Avoid Bad Dental Habits

• Do not chew ice, hard candy, or other hard foods that could damage the crown.
• If you grind your teeth at night, consider using a night guard to protect your crown and natural teeth.

3. Schedule Regular Dental Checkups

• Visit your dentist at least twice a year for professional cleanings and checkups.
• Have your crown examined to ensure it remains intact and properly fitted.

4. Address Issues Immediately

• If you notice a black line at the base of your ceramic or porcelain crown, visit your dentist promptly.
• Any sign of pain, sensitivity, or discomfort around the crowned tooth should be evaluated immediately.

A Crown Is Not a Shield Against Decay

Dental crowns are highly effective at protecting teeth, but they do not make them invincible. With proper care, a crowned tooth can remain healthy for many years. If you have concerns about your dental crown or need a checkup, our expert team at Preferred Dental Center in San Antonio is here to help.

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Request an appointment here: Preferred Dental Center or call (210) 822-8500 to schedule a visit with Dr. Andres Biaggi

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