Profile: Chinese Stomato logical Association of oral mucosa of the Authority chairman, the Chinese Stomato logical Association of Hospital Management, vice chairman of the Authority, the Chinese Stomatological Association of directors, Shanghai oral medical director of the Center for Quality Control, the International Faculty of Dentistry Fellow (ICD) , Shanghai Second Medical University School of Stomatology, vice president of Shanghai oral, deputy director of the Institute of Medicine, 9 People’s Hospital of oral medical director. Specializes: Integrated Treatment of oral mucosal diseases, including ulcers, white spot, Lichen Planus, pemphigus, chronic cheilitis, lupus erythematosus, oral sexually transmitted diseases, etc.. Pulp-dry teeth at the centre, from the outer enamel and dentin and cement around the package, only in a very sharp hole and organizations linked to periapical; pulp nerve from the trigeminal nerve, Intramedullary The nerve fibers low stress threshold, and its strong pressure sensitivity, and pulp their own organizations other than the pressure was on the organ of the Organization of high pressure. When the pulp artery inflammation at the first expansion, congestion, caused by the pulp cavity of the pressure increased, so that the root tip-vein are oppressed, leading to venous congestion, so that effusion aggregation, a result of the adoption of the very small tip Contact with the outside hole, poor drainage, poor blood supply, resulting in the pulp nutrition obstacles, can cause pulp necrosis. Necrotic tissue and release more inflammatory products, so that more of the increase in vascular leakage, further increasing the pressure within the marrow, plus the pulp was closed in the inelastic hard in the cavity, as pulp for the four weeks A solid tooth, the amount of space marrow is constant, there is room for a buffer, increased the pressure on the pulp of oppression, will result in severe pain, with the pulp cavity of the pressure increased, further increasing the pain and therefore This is indeed unbearable pain, most patients are very painful toothache Jane to the immediate experience.