How to predict the percentage of root coverage ?

@ A case (#43) of severe gum recession and root exposure after orthodontic treatment:

1. Severe root prominence
2. Root outer the alveolar house
3. Miller's classification : Class III
4. Root exposure with wide and deep type

For severe gum recession + loss of some interproximal bone + wide and deep root exposure>>> 100% root coverage is not possible!

....70~80 % root coverage will be predictale goal.

....Cervical operative restoration may be needed to cover exposed root surface.