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The osteotomy has to be changed to the palatal plateau (Fig.2 *). The plateau is apical to the palatal crest. Since the plateau is relatively flat, penetration is easy (Fig.7). The drawback is that it is palatal. As drills increase in diameter and go deep, the coronal end of the drills is pushed buccally, while the apical end palatally. The final osteotomy is more or less in the center of the socket with 2-3 mm buccal gap.
in Wei, DDS, PhD, MS 1st edition 12/21/2014, last revision 12/21/2014