To appreciate the shifting, let us study the extracted tooth with granulation tissue in the furcation (Fig.4 *).  With removal of the granulation tissue and turn of the tooth is Fig.5: pretend that the tooth has been extracted; between the buccal (B) and palatal roots is the septum.

Septal Slope of Upper 2nd Molar Last Next Xin Wei, DDS, PhD, MS 1st edition 08/25/2015, last revision 10/19/2019