Dentist removed tooth but left the root. He just said it would fall out anyway. Can I get an implant with an open bite?

Today i visited my dentist so he could check my mouth & see if everythings alright 'cause some days ago,i felt my tooth was shaky & gum was swelling.I didn't feel ANY pain.what was my surprise at the end that without warning me,he removed the tooth(the crown,he said)but the root STILL REMAINS?Last session he told me my mouth was ok?Im so sad i don't even know if i can get an implant 'cause of my open bite.he's been my dentist for YEARS..is this normal?thought i could trust him.what can I DO now?