According to the location and pneumatization of the sphenoidal sinus,110 posterior walls of sphenoidal sinus were assigned into three categories:thick walls(35.6%),thin walls(55.9%)and weak walls(8.5%).

 
  • 结合蝶窦气化情况;将蝶窦后壁按厚度分为厚壁型(35.;6%25)、薄壁型(55
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