Impacted molars are more common in maxillary and mandibular third molars, whereas impacted first molars are relatively rare. A case of horizontal impaction of mandibular first molar is reported in this study, and the relevant literature are presented.
磨牙阻生多见于上下颌第三磨牙，第一磨牙阻生相对罕见。本文报道下颌第一磨牙水平阻生1例，并结合相关文献对其进行讨论。.
Keywords: first molar; horizontal impaction; impacted teeth.