AIn fact the apex of the lateral incisor is also in the center of the alveolus (Fig.9 *).  Osteotomy established in the lingual slope for a long distance (Fig.10,11) will perforate the lingual plate.  The correct method of osteotomy is to set up in the middle of the socket and along the long axis of the alveolus with 2 fingers holding the alveolus (Fig.12 (2 circles)).  The problem for this case is to use the lower RPD as a guide.  With the RPD in place, the tactile sensation is lost.

Prevent Perforation

Xin Wei, DDS, PhD, MS 1st edition 07/15 /2017, last revision 07/15/2017