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Table 2 Distribution of shapes on CT sagittal sections in normal and cystic maxillary incisive canals

From: Advocacy of diagnostic criteria for maxillary incisive canal cysts based on alteration of normal maxillary incisive canals according to aging in Japanese populations

Age group Cylindrical Funnel Spindle Hourglass
Male (Normal canals) Female (Normal canals) Patients (Cystic canals) Male (Normal canals) Female (Normal canals) Patients (Cystic canals) Male (Normal canals) Female (Normal canals) Patients (Cystic canals) Male (Normal canals) Female (Normal canals) Patients (Cystic canals)
20s 12 13 1 13 13 1 4 3 1 3 4 5
30s 8 9 1 10 8 0 3 4 1 4 2 2
40s 5 4 1 4 2 0 4 2 0 3 3 1
50s 3 3 3 4 3 0 2 2 1 2 1 4
60s 3 3 2 2 3 0 1 1 1 5 2 5
70s 3 2 1 3 1 1 2 3 1 3 3 3
80s 4 3 1 4 3 0 2 0 0 2 2 3
Total 38 37 10 40 33 2 18 15 5 22 17 23
  1. CT Computed tomography