Fig. 4. Schematic illustration showing the classification of root proximity according to the location of the miniplate anchoring screw (MPAS) at position 1. A, Frontal view: group 1, frontal overlap (no contact [1a], frontal contact [1b, the MPAS contacts the labial surface of the mandibular incisor], and root perforation [1c]); group 2, interdental space; group 3, lateral contact; and group 4, no-root area. B, Axial view: 1a, no contact; 1b, frontal contact; 1c, root perforation; 2, interdental space; 3, lateral contact.
