Violation
After periodontal surgery, sensitivity to thermal change is reduced by 1. replaning the roots. 2. keeping the roots free of bacterial plaque. 3. adjusting the occlusion. 4. desensitizing the roots with an appropriate medicament.
All of the above.
(1) (2) (3)
(1) and (3)
(2) and (4)
(4) only.