so that the mesial (M) and distal (D) roots are able to keep the osteotomy without deviation (Fig.6 red arrow), particularly when osteotomy increases in diameter.  It may deviate mesially or distally without the roots.

No Deviation in 3D     Last     Next

Xin Wei, DDS, PhD, MS 1st edition 06/13/2020, last revision 06/13/2020