I have tooth pain 7/10 over last two days in a tooth which had a filling done on it in 11/2014. no gum swelling or discomfort. what could it be?

Dental abscess: The most common type of dental abscess is a periapical abscess (tooth), and the second most common is a periodontal abscess (gums) or combination of both tooth-gum abscess, regardless if the tooth has a filing. In order to get appropriate treatment it is important to know the underlying cause for this infection. Rec.: see your dentist for evaluation, imaging and treatment. .

More info needed....: Pain = 7/10... to what ? Hot? Cold? Biting down? Continuous or episodic? How deep was the filling? Without answers to these questions it is not possible to accurately diagnose your problem. Your best bet is to call our dentist for a followup. Hard to say without a radiograph and and an exam.

Likely root canal: While it's important to get a complete exam on the situation before making a diagnosis, I find that 80% of the time a 7/10 pain showing up 6 months after dental treatment on a specific tooth will be indicating irreversible pulpitis and the need for completing removal of the dying nerve/pulp within the tooth. Eliminate all other causes of pain through a thorough exam first, of course.

Acute Pulpitis: The tooth could be fractured (especially likely if the filling was large or deep). Root canal treatment may be needed if the nerve is involved. An xray and clinical evaluation would give more definite information. If possible, see the same dentist to get a good comparison (before/after). BUT it may be a structural issue that can be resolved with a crown that can hold all the pieces together.

Many possibilities: Most common cause is pulpitis, or irritation to the pulp. Bacteria infiltrate the tooth in a slow insidious manner and the body does not usually feel them damaging the dentin. When the dentist removes them, they clean away the dead tooth structure exposing the healthy live tooth structure. The exposed dentinal tubules can cause pain. May need a root canal or redo filling.

Pulpitis: Pulpitis likely. May need root canal. Follow advice of treating dentist.