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。
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。
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