The Inferior Alveolar Canal is ~ 3 mm thick. To avoid nerve injury from implant (green box), there should be an extra 2 mm clearance (Fig.2).
Infiltration anesthesia is administered first; a 10 mm osteotomy is made initially (Fig.3). The clearance appears to be not enough. The length of the osteotomy is reduced to 8 mm.
When a PA shows one border of the Canal, it is most likely the inferior one (arrowheads).
Non-Immediate Implant in Lower 2nd Molar
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Xin Wei, DDS, PhD, MS 1st edition 05/31/2015, last revision 11/20/2018