Abstract:

 Objective  To recognize the regularity of the uncinate process'superior attachment sites and frontal sinus drainage pathway in rhino-patients. Methods  50 coronal computed tomography scans of the sinuses performed from July 2007 to November 2007 were evaluated. Result  About 62% (59/95) of the uncinate process had two or more superior attachment sites, and the other 38%(36/95) had one superior attachment site.When the uncinate process had two or more superior attachment sites, 95%（56/59） of frontal sinuses directly drained into the middle nasal meatus. Conclusion  The structure of the frontal recess could be clearly recognized by coronal computed tomography.

Key words: Frontal sinus; Uncinate process of the ethmoid bone; Tomography, X-ray computed