Fig.2 (coronal section of CBCT of the lower left 1st molar): A bone-level implant is placed (6.9x10 mm; apical diameter: 4.8 mm).  N: the inferior alveolar nerve. The lingual plate is thicker than the buccal one.  Osteotomy may have to start closer to the lingual plate.  The thicker plate may deviate drills, taps and implant to the weak plate.

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Xin Wei, DDS, PhD, MS 1st edition 03/08/2013, last revision 03/08/2014