Methods Fifty-nine patients with impacted tooth were taken transverse tomography by SIEMENS panoramic machine.
方法对59例上颌前部埋伏牙患者，通过SIEMENS全景机拍摄横断体层片。
Results 14 patients were localized successfully, and one patient was failing because the distance between the impacted tooth and the reference tooth is too close to differentiate.
结果14例患者取得明确定位，1例因阻生牙与参照牙距离过近而失败。
The X-ray photographs of 400 cases of mandbular impacted third molar were observed and the impacted molar types and relations between impacted types and complications of impacted tooth were analysed.
通过400例下第三磨牙的X 线片观察，分析了阻生齿的阻生类型，阻生类型与阻生齿并发症的关系。
Impacted tooth frequently appears in upper cuspid and upper central incisors(except of the third molar) .
较常见的是尖牙和上颌切牙的埋伏阻生（第三磨牙除外）。
Impacted tooth frequently appears in upper cuspid and upper central incisors(except of the third molar) .
较常见的是尖牙和上颌切牙的埋伏阻生（第三磨牙除外）。
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