第三磨牙是人类口腔中萌出最晚的一颗牙，往往在18-26岁才萌出。随着人类的进化，由于颌骨变小，而没有足够的位置，从而形成智齿错位萌出，这种牙又叫阻生牙。它往往会使牙冠周围软组织产生炎症，即"尽头牙"发炎。这种牙不但无功能反而有害，必须尽早拔除，以防止进一步发炎。
第三磨牙组织牵开器 third molar tissue retractor
下颌第三磨牙 mandibular third molar ; mandibular wisdom tooth
上颌第三磨牙 maxillary third molar ; upper third molar
阻生第三磨牙 impacted third molar ; impacted mandibular third molar ; IMTM
下颌阻生第三磨牙 impacted mandibular third molar
远中阻生第三磨牙 distal impacted third molar
释义下颌第三磨牙 lower third molar
第三磨牙牙胚 third molar germ
Results:1. There were significant differences in the change in the third molar eruptive space and space/width ratio among three groups(P<0.05).
结果:(1)第三磨牙萌出间隙及其与牙冠近远中径的比值变化量在3组之间均有统计学差异(P<0.05),拔第一磨牙组大于拔第一前磨牙组和非拔牙组。
参考来源 - 拔除第一磨牙矫治后第三磨牙萌出情况初探·2,447,543篇论文数据，部分数据来源于NoteExpress
结论引流能减少下颌阻生第三磨牙拔除后并发症的发生。
Conclusion Sluice can reduce postoperative complications after removal of mandibular third impact molars.
结论引流能减少下颌阻生第三磨牙拔除后并发症的发生。
Conclusions Sluice can reduce postoperative complications after removal of mandibular third impact molars.
如果下颌升支前部的吸收改建有限，下颌第三磨牙的萌出就会受阻。
If the remodeling resorption at the anterior aspect of the mandibular ramus is limited, the eruption of the mandibular third molars might be blocked.
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