I have a lingual paresthesia due to a lesion in the inferior dental nerve. will i recover soon?

Depends: It depends on the lesion and how it was removed. If it was removed and the nerve was cut, then it will take a long time if ever to recover. If the nerve was "bruised" or injured, thenit take 6-12 months to regain normal function.

Paresthesia: Sometimes after surgery it may take time for the normal feeling to come back. It can be a few days to a few months. On rare occasions it can be permanent . The surgeons try's to do their best but sometimes anatomically it may be very difficult and risky.