急性牙髓炎（acutepulpits，AP）是口腔常见疾病，其主要症状是剧烈的、难以忍受的疼痛。临床上常见到这种疼痛放散到周围其它部位，以至患者就医时，不能准确指出患牙，不仅给诊断造成困难，也给患者带来很大的痛苦。研究AP疼痛的放散规律，正确认识其临床意义，有助于提高AP Acute pulpitis (AP) is a common oral disease, the main symptom is severe, unbearable pain. Clinically, it is common to see such pain emanating to other parts of the surroundings. As a result, patients can not accurately identify their teeth when they seek medical treatment, which not only causes difficulties in diagnosis but also brings great suffering to the patients. Studying the rules of AP pain release, correctly understand its clinical significance, help to improve AP