1. Injury to a nerve resulting in numbness or tingling of the chin, lip, cheek, gums and/or tongue on the operated side; this can persist for several weeks, months or, in rare instances, permanently
2. Postoperative infection requiring additional treatment
3. Opening of the sinus (a normal cavity situated above the upper teeth) requiring additional surgery
4. Restricted mouth opening for several days or weeks, with possible dislocation of the temporomandibular (jaw) joint
5. Injury to adjacent teeth or fillings
6. In rare circumstances, cardiac arrest or breakage of the jaw
7. Postoperative discomfort, swelling and bleeding that may necessitate several days of recuperation
8. A small piece of root left in the jaw when removal would require extensive surgery
9. Stretching of the corners of the mouth with resultant cracking and bruising