A dental crown is a tooth-shaped cap placed over a damaged or decayed tooth to restore its form, size, and function. While crowns offer protection, the natural tooth structure underneath remains susceptible to decay, allowing cavities to form.
How Cavities Develop Under Crowns
Cavities often form under crowns when the crown does not fit perfectly, leaving tiny gaps where bacteria and food particles accumulate. Over time, the cement holding the crown in place can wear down, creating spaces for bacteria to enter and cause decay. Gum recession can also expose parts of the natural tooth not covered by the crown, making them vulnerable to decay.
Poor oral hygiene is another contributing factor, as inadequate brushing and flossing allow plaque and bacteria to build up around the crown’s base. This bacterial accumulation can lead to the erosion of tooth enamel just beneath the crown, particularly at the margin where the crown meets the natural tooth. The original tooth structure beneath the crown is still vulnerable to decay, even with the crown’s protection.
Recognizing a Cavity Under a Crown
Identifying a cavity under a crown can be challenging because signs might be subtle or not immediately visible. Indicators of decay include discoloration around the crown margin, such as dark lines or a graying appearance. In advanced stages, if decay is extensive, the crown might appear loose or shifted as the underlying tooth structure weakens.
Sensory cues are common. You might experience increased sensitivity to hot, cold, or sweet foods and beverages. Persistent pain, especially when biting down or chewing, is another symptom. Other signs include persistent bad breath or an unusual, unpleasant taste in your mouth, which can signal bacterial buildup. Swelling or inflammation of the gums around the crowned tooth may also indicate decay affecting the tooth at or below the gum line.
A professional diagnosis by a dentist is necessary to confirm a cavity. Dentists often use dental X-rays to reveal decay not visible during a visual examination. X-rays can show issues hidden beneath the crown or in tight spaces between teeth. Dentists may also use a dental probe to check for soft spots or areas where the crown does not fit snugly against the tooth, indicating potential decay.
Next Steps When a Cavity is Suspected
If you suspect you have a cavity under a crown, schedule an appointment with your dentist promptly. Avoiding self-diagnosis or attempting to treat the issue yourself is advisable, as professional evaluation is necessary for an accurate assessment. A dentist can conduct a thorough examination and use diagnostic tools, such as X-rays, to confirm the presence of decay and determine its extent.
Early detection of a cavity under a crown is important for preventing further damage and preserving the tooth. Addressing the issue in its early stages can lead to less invasive and more conservative treatment options. Prompt dental care helps avoid complications that could lead to more extensive procedures or, in severe cases, tooth loss.