上颌窦向牙槽突气化的CT测量及意义

The measurement of pneumatization of maxillary sinus extended into alveolar process basing on the CT and its clinical significance

目的:探讨上颌窦向牙槽突气化的不同分型之间上颌窦实际外科深度的差异。方法:对100例患者的鼻窦CT结果进行观察分析,基于上颌窦底与硬腭的解剖关系,将上颌窦向牙槽突气化程度分型,并对上颌窦外科操作深度进行测量。结果:上颌窦外科实际操作的深度在3种类型的牙槽突气化中存在显著差异,Ⅲ型气化的上颌窦实际深度为(32.27±3.48)mm,深于Ⅱ型气化(28.35±3.45)mm及Ⅰ型气化(20.73±3.09)mm,差异均有统计学意义(均P<0.05)。此外,Ⅱ型气化也显著深于Ⅰ型气化(P<0.05)。结论:上颌窦向牙槽突的气化程度决定了上颌窦中鼻道自然口扩大后上颌窦的实际深度,可以作为内镜上颌窦手术入路选择的参考。

Objective：To investigate the significance of pneumatization of maxillary sinus extended into alveo- lar process. Method： One hundred outpatients encountered were included in this study. The pneumatizations of maxillary sinus extended into alveolar process were observed and classified. Depth of surgical procedure of maxil- lary sinus in different type was measured. Result： The actual depth of surgical procedure of maxillary sinus of in different types of the alveolar process pneumatization varied greatly. The actual depth of surgical procedure of max illary sinus in type Ⅲ pneumatization of alveolar process were（32.27±3.48）mm, which were significantly deeper than type Ⅱ （28.35±3.45） mm and type Ⅰ （20. 73±3.09） mm（P〈0.05 respectively）. Moreover, The actual depth of surgical procedure of maxillary sinus in type Ⅱ was also deeper than type Ⅰ （P〈0.05）. Conclusion：The pneumatization of maxillary sinus extended into alveolar process can significantly affect the actual depth of the maxillary sinus in the operation of endoscopic middle meatus antrostomy, which may serve as a reference for the choice of endoscopic maxillary sinus approaches.