why pulpitis unbearable toothache

Dental pulp bit dry central location, the outer layer from the enamel, dentin and cementum encircled the only hole in the very tip associated with periapical tissue; pulp nerve from the trigeminal nerve, medullary cavity nerve fiber stress threshold is low, its susceptibility to strong pressure, and pulp tissue itself inherently tissue pressure than other Dental compressor organs tissue pressure is high. When the pulp first arterial vasodilatation inflammation, congestion, resulting pulp increased internal pressure in the cavity, so that the apical hole by compression of the vein, causing venous congestion, so that the exudate accumulation, due to the very tip through a small hole contact with the outside, so that poor drainage, poor blood supply, resulting pulp nutritional disorders, can cause pulp necrosis. Necrotic tissue and releases more inflammatory product, to make more vascular leakage increased intramedullary pressure is further increased, coupled with the pulp is enclosed in a rigid cavity inelastic, that is surrounded by the pulp tissue solid tooth structure, medullary cavity space capacity is constant, with no room for a buffer, increased oppression of pulp nerve pressure, it will have severe pain, with the pulp cavity pressure increases, further aggravating the pain, and thus This pain is really unbearable, the majority of patients have painful toothache Jane up vital experience.