Can You Get a Cavity on a Filling? Understanding Secondary Caries
The short answer is yes, you can get a cavity on a filling, or more accurately, around a filling. This is often referred to as a secondary caries, recurrent caries, or a leaky filling. While fillings are designed to protect your teeth from decay, they aren't foolproof, and several factors can contribute to the development of cavities near existing restorations.
This article will delve into the causes of secondary caries, preventive measures, and what you can do to protect your teeth and fillings.
What Causes Cavities Around Fillings?
Several factors can lead to secondary caries developing around a filling:
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Poor oral hygiene: Insufficient brushing and flossing allow plaque and bacteria to accumulate around the edges of the filling, leading to decay. This is the most common cause. Bacteria thrive on sugars and starches, producing acids that attack the tooth enamel and dentin.
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Inadequate sealing of the filling: If the filling isn't properly sealed to the tooth, bacteria can seep underneath and cause decay. Over time, the bond between the filling and the tooth can weaken, creating microscopic gaps where bacteria can thrive.
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Wear and tear of the filling: Over time, fillings can wear down, particularly those made of amalgam (silver fillings). This wear creates gaps that allow bacteria access. Composite (tooth-colored) fillings are less prone to wear, but still vulnerable to damage.
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Dietary habits: A diet high in sugary and acidic foods and drinks significantly increases the risk of cavity formation, both with and without fillings.
How Can I Prevent Cavities Around My Fillings?
Prevention is key to protecting your teeth and fillings from decay. Here’s what you can do:
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Maintain excellent oral hygiene: Brush your teeth twice a day for two minutes using fluoride toothpaste, and floss daily to remove plaque and food particles from around your fillings.
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Regular dental checkups: Regular visits to your dentist (every six months is generally recommended) allow for early detection of any problems. Your dentist can examine your fillings for any signs of wear, cracks, or leakage.
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Healthy diet: Minimize sugary and acidic drinks and foods. Consume plenty of water, and consider healthy snacks such as fruits and vegetables.
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Fluoride treatments: Ask your dentist about fluoride treatments, which can strengthen tooth enamel and make it more resistant to decay.
What Happens If I Get a Cavity Around My Filling?
If a cavity develops around your filling, your dentist will need to remove the decayed area and replace the filling. In some cases, more extensive treatment like a crown may be necessary, depending on the extent of the decay. Early detection is critical to minimize the extent of treatment needed.
Does the type of filling matter?
Yes, the type of filling can influence the risk of secondary caries. Amalgam fillings, while durable, can wear down over time, creating spaces where bacteria can invade. Composite fillings are less prone to wear but can still be vulnerable if not placed properly or if oral hygiene is poor.
Can I tell if I have a cavity near my filling?
You may not notice any symptoms in the early stages of a secondary cavity. Regular dental checkups are the best way to catch problems early. However, some signs could indicate a problem such as sensitivity to hot or cold temperatures, pain when chewing, or a visible dark spot near the filling. If you experience any of these symptoms, contact your dentist immediately.
By following these preventive measures and attending regular dental checkups, you can significantly reduce the risk of developing cavities around your fillings and maintain healthy teeth for years to come. Remember, your oral health is a vital part of your overall well-being.
