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本研究的目的是:用三视图(即同时观察侧向,斜向45°和后前位头颅片)来描述男性下颌第三磨牙的正常萌出;观察某些下颌阻生第三磨牙的萌出道;考察第三磨牙萌出与阻生有关的参数。材料与方法:本研究用改良的随机抽样法选择20人(均属北美黑种人),每人均有二个下颌第三磨牙,共计40颗牙。在B.F.Wehmer头测量器上摄取所有为本研究使用的标准侧位:左右侧斜向45°位、
The purpose of this study was to describe the normal eruption of the third mandibular third molars in three views (ie simultaneous lateral, oblique 45 ° and posterior head cranial); to observe the eruption of the third molars impacted on the mandible ; Investigate the third molar eruption and impaction-related parameters. MATERIALS AND METHODS: Twenty patients (all North American blacks) were selected by a modified random sampling method. Each patient had two third molars with a total of 40 teeth. All standard lateral positions for the study were taken on a B.F.Wehmer head gauge: left and right oblique 45 °,