- Patients will be randomly assigned to one of 2 groups: experimental group (taking a 100 mg of Aceclofenac) and the control group (taking a placebo tablet). Each tablet will be taken one hour before starting treatment. After 15 minutes of the initial inferior alveolar nerve block (IANB), the teeth will be examined using a cold pulp sensitivity test; in case of no or mild pain, the treatment will be initiated otherwise, additional IANB will be administered.