Colours: blue = MIC, red = mental canal (the anterior opening of the mandibular canal) yellow = mandibular canal.
1 = distance from the inferior border of the mandible to the canal (7.2 to 10.2 mm);
2 = MIC has complete, partial, or no bony cortical borders;
3 = MIC is terminating apically to the lateral incisor and sometimes apically to the central incisor (approximate length 7 mm);
4 = distance to the buccal plate (approximate distance 2.4 mm);
5 = tooth apex-canal distance (in dentate subjects) (approximate distance 5.3 mm);
6 = MIC diameter (0.48 to 6.6 mm).