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The bone is so dense that a 6 mm drill jumps at the opening of the osteotomy and that a 5x14 mm tissue-level implant (Fig.3 I) has insertion torque of >60 Ncm. The patient feels much pressure while the implant is being placed in spite of large amount of anesthetics. The superior border of the Inferior Alveolar Canal (red dashed line in Fig.1,2) is not distinct in Fig.3, but the implant should have enough clearance, since it is superior to the line connecting the apices of the teeth #30 and 31 (brown line).
Xin Wei, DDS, PhD, MS 1st edition 10/05/2015, last revision 12/19/2018