张某,女,37岁。助产士。因左下后牙反复肿痛两月余,于1988年8月29日就诊。查:(?)前倾阻生,残冠,叩痛(士)。远中及颊侧龈瓣轻度充血,(?)缺失,诊断:(?)8慢性冠周炎。治疗经过:在左下齿槽神经传导阻滞麻醉下,用牙挺挺出患牙。查:该牙为一融合根,其颊侧根同时带出约0.5×0.5cm大小之牙槽骨,与牙根呈骨性粘 Zhang, female, 37 years old. Midwife Due to repeated swelling of the left lower back teeth more than two months, August 29, 1988 treatment. Check: (?) Antegrade obstruction, residual crown, percussion pain (disabilities). Distal and buccal gingival flap mild hyperemia, (?) Deletion, diagnosis: (?) 8 chronic pericoronitis. After treatment: under the left lower alveolar nerve block anesthesia, with teeth Ting Ting teeth. Check: The tooth is a fusion root, the buccal root at the same time bring about the size of 0.5 × 0.5cm alveolar bone, and the root was skeletal sticky