Although very rare, the incidence of nerve damage due to anesthesia via inferior alveolar block is about 1:26762 and 1:160571. In more than 85% of the cases, the symptoms resolve within about 8 weeks, with a poor prognosis after this time period.
Source: Sevels I, Clinical Abstracts, Inferior Alveolar Nerve Damage, Ontario Dentist, Nov 2014, vol 91, no 9, pg 16.
Hans Skariah, B.Sc., DMD
Promenade Court Dental
2233 Hurontario St., Mississauga, ON, Canada (905) 273-7100
43 Albert St. West, Unit 8, Plattsville, ON, Canada (226) 656-1000