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Why does the tooth hurt after filling?

Dental treatment, like any other medical intervention, can have not only pleasant consequences, but often causes trouble. One of the troubles is pain that appears on the day of tooth treatment and can continue for some time later (up to 3 days or more).

The causes of toothache after treatment differ depending on what kind of manipulations were performed with the tooth:

reatment of deep caries can subsequently cause pain in the tooth, when the filling is installed in sufficient proximity to the pulp chamber and, if unsuccessfully biting into it, can cause compression of the tooth nerve, which provokes pain.
A filling that is insufficiently adjusted to the bite increases the bite and can injure not only the pulp when biting, but also creates an additional load on the periodontium, which causes pain in the area of the tooth.
Depulpation of a tooth is in itself already an injury to the nerve endings that fit the teeth, because the doctor has to break the innervation at a certain interval. In this case, the tooth will ache for a while, and the pain may affect the areas adjacent to the tooth (for example, part of the dentition may hurt).
Often a tooth hurts after filling in the event of an unsuccessful endodontic treatment (when removing the filling material outside the root apex, when the root canal is not filled or other possible cases).
Sometimes it seems that the tooth hurts after filling, but in fact the gum adjacent to the tooth hurts, which had to be moved away (retracted) for the correct placement of the filling in the extensive marginal defect of the tooth. Mechanical retraction of the gums disrupts the circular ligament of the tooth, which is the cause of pain.
Often the cause of pain after filling the teeth is pressure sores on the gums, which formed even before treatment (for example, under an old filling that has slipped onto the gum or interdental papilla, or as a result of food methodically clogged into the interdental space). Painful sensations in this case were present before the treatment of the tooth and may not go away after the treatment for some time, although the factors traumatizing the gums were eliminated during the treatment period.

In any case, after the treatment and filling of the tooth, it is necessary to wait some time (up to three days), and if the painful sensations do not reduce the intensity, but continue, seek the advice of your doctor - dentist, who will identify the cause of the persistent pain and take measures to eliminate this cause.