A 2 mm pilot drill is used to initiate osteotomy at the depth of 8 mm. A parallel pin is inserted for the 1st intraop PA (Fig.4: P), which shows again likelihood of incooperation from the patient. The inferior alveolar nerve canal is not completely shown (red dashed line). Combined with the information from CT, it appears alright to continue increasing osteotomy in the diameter and depth.
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Xin Wei, DDS, PhD, MS 1st edition 04/20/2013, last revision 04/20/2014