Violation
The retention form of a full crown preparation can be improved by 1. reducing its taper. 2. increasing its length. 3. utilizing grooves or boxes. 4. polishing the preparation.
(1) (2) (3)
(1) and (3)
(2) and (4)
(4) only
All of the above
The retention form of a full crown preparation can be improved by 1. reducing its taper. 2. increasing its length. 3. utilizing grooves or boxes. 4. polishing the preparation.
(1) (2) (3)
(1) and (3)
(2) and (4)
(4) only
All of the above