hello and welcome to HCM forum,
After reading through your query,
I would like to inform you that sometimes following extraction, inability to open mouth completely and a feeling of
numbness is from the local
anesthetic that is injected, it is temporary and usually become normal on its own.
You can take painkillers as advised by your
dentist.
If the symptoms do not go away in next 24 hrs, kindly see your dentist.
until then apply alternate hot and
cold compresses over your jaw joint, this will allow jaw muscles to relax and increase the mouth opening.
Do not worry, continue to follow the instructions given by your dentist, kindly have a regular follow-up.
I Hope I answered your query,
I wish a very good health,
take care.