Why Your Tooth Hurts When Eating After a Filling

Experiencing tooth sensitivity or pain after a dental filling is common. This article explores the reasons behind post-filling discomfort, offers guidance on recognizing different pain types, and advises when to seek professional dental care.

Understanding Post-Filling Pain

Receiving a dental filling involves removing decayed tooth material, which can irritate the delicate pulp, the innermost part of the tooth containing nerves and blood vessels. This irritation often leads to temporary sensitivity as the tooth adjusts to its new filling. The nerve endings within the tooth may respond more intensely to temperature changes, pressure, or even air.

Sometimes, a filling might be slightly “high,” interfering with your natural bite. This misalignment can cause pressure on the filled tooth when biting, leading to discomfort. Your dentist can easily adjust the filling’s height to correct this issue.

When a cavity is particularly deep, the filling material may be placed closer to the tooth’s nerve, which can increase sensitivity or cause inflammation of the pulp. While often reversible, deeper fillings can lead to longer-lasting sensitivity.

Types of Pain and What They Mean

Distinguishing between different types of pain can help determine if your post-filling discomfort is normal or signals a more serious issue. Temporary sensitivity is often described as a sharp, short-lived pain that occurs when the tooth is exposed to hot or cold temperatures, or even air, and quickly fades once the stimulus is removed. This kind of sensitivity is a normal part of the healing process as the tooth acclimates to the new filling and should resolve within a few weeks.

Pain experienced specifically when biting or chewing often points to a high filling. If the pain persists or worsens, however, it could also indicate a cracked tooth or a deeper issue with the tooth’s pulp. Constant, throbbing pain, particularly if it lingers or wakes you from sleep, suggests significant pulp inflammation (pulpitis) or possibly an infection within the tooth.

Pain that lingers for more than a few seconds after exposure to hot or cold stimuli is also a sign of significant pulp irritation, potentially indicating irreversible pulpitis. Dull, continuous discomfort, even when not biting, can also suggest a sensitivity issue or an improper bite alignment.

When to Contact Your Dentist

While mild, temporary sensitivity after a filling is common and resolves within a few weeks, certain symptoms warrant contacting your dentist. If the pain is severe, worsens over time, or is characterized by constant throbbing, seek professional evaluation. Other red flags include swelling in the face or jaw, fever, or any other signs of infection.

If pain when biting down does not improve after a few days or weeks, or if the feeling of an uneven bite persists, your dentist can adjust the filling. For managing mild discomfort at home, over-the-counter pain relievers can be used, and avoiding extreme temperatures or a very hard diet may provide some relief. Maintaining good oral hygiene is also beneficial during the healing period.

Contact your dentist if your symptoms are concerning or uncertain. Early intervention can help prevent minor issues from escalating into more serious problems, potentially saving your tooth from more extensive treatment like a root canal. Your dentist can assess the situation and recommend the appropriate course of action.

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