The New Filling Hurt More Than the Cavity Did

Quick answer: Pain when biting after a new filling is usually a high spot, and adjusting it takes five minutes. Pain to cold that lingers, or that wakes you at night, is the nerve, and that is a different conversation. The distinction is easy to make at home.

The call

Elisheva, 34, from RBS Bet, had a filling on a Tuesday and phoned on the Thursday, frustrated. The tooth had been mildly sensitive before treatment. Now she could not bite on it at all, and she had a dull ache spreading along that side of her jaw.

Her assumption was that the filling had been done badly. As it happened, the tooth was fine and the fix took less time than the phone call.

What we found

Her bite. When we asked her to close on articulating paper, the new filling on the lower right first molar made contact a fraction before every other tooth in her mouth.

The scale of this is worth appreciating. The periodontal ligament — the sling of fibres suspending each tooth in its socket — can detect a discrepancy of around 20 microns, a fifth of the thickness of a sheet of paper. A filling that is high by that much means the tooth takes the full force of every bite, every swallow, and every clench during the night, before anything else touches. Within a day or two the ligament becomes inflamed and bruised. That produces exactly what she described: pain on biting, a dull persistent ache, and often tenderness spreading to the jaw and ear.

Numb lips at the time of the filling are the usual reason it happens. You cannot judge your own bite reliably while anaesthetised, and a filling that felt fine in the chair can feel enormous three hours later.

Crucially, her tooth responded normally to cold — a brief, sharp response that stopped immediately. That ruled out the other explanation.

What we did

Adjusted the filling with a fine polishing bur, rechecked with articulating paper in several positions including side-to-side movements, and polished it smooth. Under five minutes, no anaesthetic.

We told her the ache would take three to five days to settle, because the ligament needs time to recover even after the cause is removed. It did.

The outcome

Comfortable within four days, and no problems since.

Here is the distinction that matters, and it is easy to apply at home:

• High bite. Hurts on biting and chewing. Normal or near-normal response to cold. Started right after the appointment. Adjusting it fixes it.
• Post-operative sensitivity. Sharp with cold, settles within seconds, gradually improving over days to weeks. Common after a deep filling. Usually needs patience, not treatment.
• Irreversible pulpitis. Cold pain that lingers thirty seconds or more, spontaneous ache, worse lying down, disturbs sleep. The nerve was already too damaged. Needs a root canal — and it is not the dentist's fault; the decay got there first.

What to do if this happens to you

1. Phone the practice that did the filling. Adjusting a high bite is quick, and it should not be charged as a new problem.
2. Do not wait a fortnight to see if it settles. Every day of overloading inflames the ligament further.
3. Note what triggers the pain — biting, or cold. That single observation usually gives the answer.
4. Expect some sensitivity after a deep filling for a few weeks. That is normal and usually improves.
5. Report anything that wakes you at night. That is the sign that needs proper reassessment.
6. Do not test it repeatedly by biting hard. You are making the bruising worse.

New filling hurting? Ramat Beit Shemesh Urgent Dental Care adjusts bites the same week. 055-985-8845 · WhatsApp https://wa.me/972559858845 · Harav Kook 28/1, Beit Shemesh.

Based on real cases treated at the clinic. Names have been changed.