下颌骨内外侧面副孔分布的比较研究及临床意义

目的　通过对国人下颌骨内外侧面副孔的数量及分布特征的比较研究 ,探讨其与肿瘤浸润的关系。方法　将74块下颌骨的内外侧面分为 2区 6部 ,在 1 0～ 2 0倍显微镜下观察各区、部的副孔数。结果　副孔的数量在不同的标本上相差很大 ,内、外侧面相应各区各部的副孔数比较 ,经U检验 ,P <0 0 0 1 ,差异显著 ,内侧面多于外侧面。结论　副孔为肿瘤由骨皮质表面进入松质骨提供了直接通路 ,内侧面副孔数显然多于外侧面 ,为肿瘤细胞由内侧面骨皮质表面入侵松质骨提供了有利途径

The distribution of accessory foramina in the medial and lateral mandibular surface and its clinical siginificance

Objective To study the number and distribution feature of accessory foramina in the medial and lateral countrymen′ mandibular surface and the relationship between accessory foramina and tumor spread.Methods Mandiles were divided into 2 regions and 6 sections in 74 specimens.The number of accessory foramina in 2 regions and 6 sections were observed under microscope.Results The number of accessory foramina varied greatly from specimen.compared the number of accessory foramina between the medical surface and lateral surface in every part and every region,the difference was obvious(in 2 regions and 6 sections).The medial surface in every part and every region,the difference was obious(in 2 regions and 6 sections)( P <0 001).The medial surface was more than the lateral surface( P <0 001).Conclusion Accessory foramina provide a direct path for tumor spread from cortical surface to the cancellous bone,obviously the accessory foramina of medial surface is more than that of the lateral surface,and provide the beneficial path for tumor cell′ invading from the cortical surface of medical surface to cancellous bone.