下颌切牙可能存在的侧副神经分布可用以解释为何进行下齿槽神经或颏神经阻滞麻醉有时不能引起下颌切牙深麻醉的原因。作者在研究中使用了26具男女成人尸体,从下颌舌骨神经在颞下窝的起点到其在颏区的终点进行追踪。将二腹肌、下颌舌骨肌和颏肌由下颌骨分离,以宜于密切观查颏后孔。当下颌舌骨神经的终支进入至少含有一个切牙的下颌骨时,作者在解剖显微镜下进行了骨内解剖。在50%的标本中显示下颌舌骨神经的神经分支通过颏后孔进入下颌骨。其中有九例 The possible distribution of lateral accessory nerve in mandibular incisors may be used to explain why anesthesia with inferior alveolar nerve or chin nerve block may not sometimes cause deep anesthesia in mandibular incisors. In the study, the authors used 26 adult male and female bodies to follow the hypothalamus from the start of the infratemporal fossa to its end point in the chin area. The abdominal muscles, hyoid muscles and chin muscles from the mandibular separation, to be appropriate to closely observe the chin hole. When the terminal clavicle of the mandibular hymenal nerve enters the mandible with at least one incisor, the anatomy is performed under a dissecting microscope. In 50% of specimens, the nerve branches of the hyoidal nerve pass through the chin dorsum into the mandible. Nine of them