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Table 3 Vertical height of the sphenoid ostium from the orbital floor

From: Is orbital floor a reliable and useful surgical landmark in endoscopic endonasal surgery?: a systematic review

Landmarks Lee et al. [13] Mean (mm) ± SD Lee [16] Mean (mm) ± SD
Height of maxillary sinus roof 33.45 ± 2.83 33.83 ± 3.40
Maxillary sinus roof to posterior ethmoid roof 14.08 ± 3.03 Not measured
Maxillary sinus roof to sphenoid ostium 2.76 ± 2.80 1.79 ± 3.09
Maxillary sinus roof to sphenoid roof 12.18 ± 3.20 12.02 ± 2.93
Maxillary sinus roof to sphenoid floor 5.94 ± 2.94 6.18 ± 2.88