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Initial osteotomy is created in the mesial slope of the socket for 14 mm (Fig.5). In fact the depth is insufficient considering heavy occlusion and local anatomy. Extending another 6 mm may not violate the Inferior alveolar Canal.
The 2nd point is that when osteotomy is established in a slope, the larger diameter of an implant, the less distal bone of the osteotomy remains and probably the less stability of the implant.
Xin Wei, DDS, PhD, MS 1st edition 12/10/2014, last revision 12/09/2017