Position of the roots
in relation the MC
Above the canal Buccal side Lingual side Canal between the roots
IAN injury incidence 9/272 (3.3%) 16/86 (18.6%) 8/172 (4.6%) 0/7 (0%)
P value 0.006 < 0.0001 0.32 -
IAN recovery 23 healed within a week, and 10 healed within 6 months. No permanent injury.