Retrieval of fractured roots is extremely difficult due to hard bone.  Hemorrhage seems to be inconsistent with osteonecrosis.  The bone is so hard that the 2 mm drill does not reach the predetermined depth (15 mm vs. 13 mm (Fig.2)).  What is ignored is the mesial deviation of the initial osteotomy (<).  Red dashed line: the superior border of the Inferior Alveolar Canal.

Osteotomy Deviation Last Next

Xin Wei, DDS, PhD, MS 1st edition 05/31/2018, last revision 06/22/2018