hello and welcome to hcm forum,
I would be glad to answer your query,
i would like to inform you that your dentist
had most probably performed a pulpotomy
for your son's tooth, numbness
2 weeks post dental treatment could be due to the effect of anesthesia
, but in order to confirm it, we need to check it clinically. do not worry ,it is nothing serious as there is no pain or swelling associated with the tooth.
kindly take your son to the dentist to confirm the etiology(cause).
i hope i answered your query,
i wish your son good health,