急性牙髓炎及根尖周炎是口腔科常见疾病，主要症状是难以忍受的疼痛。开髓是减轻其剧痛的有效应急措施[1]。但是，在临床工作中常观察到一些急性牙髓炎及根尖周炎患者，经开髓应急治疗后，其疼痛未能缓解甚至加重，有些患者复诊时变成了急性报尖周炎或很尖周脓肿。我们在牙髓应 Acute pulpitis and apical periodontitis are common diseases of stomatology, the main symptom is unbearable pain. Open pulp is an effective emergency measures to reduce their pain [1]. However, in clinical practice, it is often observed that some patients with acute pulpitis and periapical periodontitis can not relieve or even exacerbate their pain after emergency treatment of the pulp. Some patients become acute apical or sharp at the time of referral Abscess week. We should be in the pulp