UT Lack Of Root Fusion Signal

[@omarsami3593]

Very usefull ,keep it up ,Thanks alot

[@eunicef1]

These are really handy demos. Thanks a lot, John.

[@ruslanibrahimov1768]

HI. Can you take video compare Root LOF and Root undercut ?
Thanks a lot, John. for interesting videos.

[@vzwarun2584]

Sir.. how to identify this is Lack of root penetration or lack of fusion. just clarify