If you have such small injury
there are more chances of complete recovery in 6 months time.
in addition you can gargle regularly and maintain good oral hygiene
these injuries do destroy the nerves buy the nerves heal on there own if the nutrition is good and if tobacco etc are avoided .hope you are not diabetic as it take time for the diabetics to heaL the wound and the sensation of nerves are also disturbed in diabetics.
you can take multivitamins specially vitamin B12