上颌第一磨牙２根１例报告患者杨××，男，２０岁，以＂左上后牙咬合痛３日＂就诊，疼痛无放射性，夜间疼痛可加剧。体检：近中邻面深龋已穿髓，穿髓点无探痛，叩痛（＋＋＋），患牙有沉浮感，颊腭侧牙槽未见瘘管，龋洞内有牙龈息肉长入，异位，位于腭侧，诊断为急性根尖... One case of maxillary first molars reported patients Yang × ×, male, 20 years old, with “upper left posterior teeth biting pain on the 3rd” treatment, pain, no radioactivity, night pain may aggravate. Physical examination: near the mid-face deep caries have been paracentesis, no trauma to wear through the pulp point, percussion pain (+++), a sense of ups and downs in the affected teeth, no fistula in the buccal and lingual alveolus, gingival polyps in the carious cavity, Bit, located on the palatal side, diagnosed as acute apical ...