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。
Purpose: the purpose of this study was to investigate the feasibility and advantage of extracting the impacted mandibular third molar via resection of lingual bone plate.
目的：探讨经舌侧骨板切除术拔除下颌低位阻生第三磨牙的可行性及其优势。
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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