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Osteotomy starts in the lingual slope of the socket of #29 with Point/Lindamann bur, but a little too distal. Gradually the osteotomy is moved mesial with the same drill; the trajectory and position (Fig.1) are better than designed, but the osteotomy is close to the Mental Loop (red dashed line).
Xin Wei, DDS, PhD, MS 1st edition 08/05/2019, last revision 01/07/2020