“Why does my tooth hurt after a deep filling?”

There can be several reasons. First, the closeness to the pulp where the nerves and blood vessels are located could already be attacked by bacteria which give off gases after the filling is completed causing a throbbing type of pain. Other reasons are the filling may be a bit too much for the bite and may need reshaping and additional polishing, and finally, the bacterial may have already invaded the pulp chamber requiring a root canal treatment to save your tooth.

That is normal. Think about the fact that when you break a bone, it takes 6-8 weeks to heal. The tooth is like bone. It takes 6-8 weeks for the pulp to recede from the deepest part of the filling, and gradually insulate itself with reparative tooth structure and become asymptomatic. As long as it is gradually lessening, you will be fine. If not, or if pain increases, you make need root canal or extraction.

The filling may be very close to the pulp.Pain to heat and biting pressure means that this tooth may need more treatment.

A deep filling would by nature mean close to the nerve. So this is an irritation to the nerve that has to settle down. Sometimes it won’t settle down and would need a root canal which is expensive or to extract the tooth, but replacement options are also expensive

Teeth are part of our bodies so are similar in that they nerve receptors like many other external body. unlike other external body parts they have live soft tissue INSIDE Hard tissue. I, sure you have seen a tree cut in half. It has solid bark outside but inside it has thousands of tubules. Teeth are similar in that they solid enamel outside with dentin under with thousands of fluid filled tubules leading from live soft tissue inside to enamel out side. IN those tubules are nerve dendrites extending a distance up the tubules. the nerve endings sense fluid movement and pressure inside those tubules. Any fluid movement or pressure in those tubules triggers a response of those nerve endings as pain. With a tooth restoration there is removal of tooth structure there insult to the tooth. the body responds to insult by inflamation response. This has increased fluid. You have soft tissue with increased fluid inside a hard structure which does not expand like soft tissue would to accomodate the increased volume of fluid . Therefore you have an increased pressure inside the tooth which activates those nerve receptors in the tubules associated with those dendrites. The only message the receptors send is pain. Hence your tooth ache.

A tooth can continue to hurt after a deep filling because it's possible that the cavity was really big and got close to the nerve, causing the nerve to be irritated. Many times, this will necessitate a root canal to remove the nerve and alleviate the pain.

Ultimately, this is something you need to discuss with your general Dentist so they can evaluate and treatment plan accordingly.

Likely because the dental restoration is close to the nerve of the tooth. Let your dentist know, they may want to see you to evaluate.

Deep fillings are closer to the nerve, hence the word deep. When the nerve gets traumatized by he handpiece (drill) or from the cavity that was getting closer to the nerve, that causes temporary discomfort or permanent pain. If the second happens you may need a root canal therapy to save the tooth.