下颌阻生第三磨牙在临床上多见于原位垂直,倾斜与水平阻生。异位阻生于下颌第一磨牙根尖下方的第三磨牙。临床上罕见。现将我们遇到的一例报告如下: 患者茅某某,女,42岁。某剧团演员,湖北省武汉市人。1986年5月因右下后牙反复疼痛、牙龈肿胀、溢脓半年余来我院就诊。半年前,患者感觉左下后牙不适、咀嚼疼痛,经服红霉素、牙周宁等药后症状得到缓解,但牙痛时好时发,曾在某医院为该牙做过脓肿切排,局部上药:抗炎治疗,仍未痊愈。检查:6无龋,松动I ,舌侧牙龈萎缩,舌侧根中1/3外露,颊侧龈沟未探及牙周袋,6近中颊龈有一瘘管,叩诊(+)57不松动,叩诊 Impacted third mandibular third molar clinical more common in situ vertical, oblique and level of impaction. Ectopic obstruction in the mandibular first molars apical third molar. Clinically rare. Now we encounter a report as follows: Patient Mao Moumou, female, 42 years old. A theater actor, Wuhan City, Hubei Province. May 1986 due to repeated pain in the lower right posterior teeth, gingival swelling, overflow pus more than six months to our hospital. Six months ago, the patient felt lower left posterior teeth discomfort, chewing pain, after taking erythromycin, periodontal and other drugs after the symptoms were relieved, but when the toothache is good, once in a hospital for the abscess incision made, the local On the drug: anti-inflammatory treatment, still not cured. Check: Caries-free, loose I, lingual gingival recession, tongue root in 1/3 exposed, buccal gingival sulcus was not detected and periodontal pocket, 6 near the middle of the gingiva with a fistula, percussion (+) 57 not loose, percussion