A tooth with a filling that hurts when you bite down hard may have reactive pain or an occlusal high spot, which may require a refilling, regrinding, or root canal, depending on the situation.
1. Reactive pain. When you bite hard on a filled tooth, it may be that the tooth caries is close to the pulp cavity, the tooth filling is not cushioned, instrument stimulation or filling material stimulation of the pulp caused by reactive pain, without medication cushioning, you need to re-remove the filling material after cushioning and filling, and instrument stimulation caused by the temporary observation.
2. Bite high point. The tooth filled with pain when biting hard, may also be the teeth bite high point, need to use the bite paper to check the bite, for adjustment and grinding.
If there is spontaneous pain in the tooth, it is suspected to be irreducible pulpal inflammation, and it is necessary to go to the hospital in time for root canal treatment.