When the 2nd premolar is extracted, the lingual plate (L) is found thicker than the buccal (B); osteotomy (Fig.6 (CT coronal section of a 2nd lower bicuspid; not the same case) red outline) forms in the lingual slope of the socket (Fig.5 <) instead of being along the original longitudinal axis.  The new trajectory in this direction is also safe for the mental loop (M).

Return to Trajectory

Xin Wei, DDS, PhD, MS 1st edition 07/22/2014, last revision 01/19/2018