Noun
pulpitis (uncountable)
(dentistry) A reversible or irreversible inflammation of the tooth pulp which is in most cases of endodontic origin but can also be of periodontal origin too. It can lead to apical periodontitis, cysts and tooth loss if not treated.
Classically, the increased pain when tilting the head forwards separates sinusitis from pulpitis. Source: Internet
Imaging by either X-ray, CT or MRI is generally not recommended unless complications develop. citation Pain caused by sinusitis is sometimes confused for pain caused by pulpitis (toothache) of the maxillary teeth, and vice versa. Source: Internet