Fig. 1From: Radiographic study of the distribution of maxillary intraosseous vascular canal in KoreansThe vertical position of the bony canals according to the tooth region on para-axial sinus CT scan. CH (canal height), distance between alveolar crest and inferior border of the canal; RH (ridge height), distance between alveolar crest and sinus floor; CHS (canal height from the sinus); CH-RH Back to article page