Hello i m 45 never had braces my teeth r ok but over crowding on bottom so much now that center tooth is receding as those adjacent seem to be shifting over the receding tooth can simpli5 help correct just the bottom teeth? In addition i have two cardiac issues mvp and bicuspic aortic valve both leak slighty. I premed before each dentist appt would braces open up my mouth to to much bacteria? I would like to correct bottom teeth as they make me slightly self conscious but wonder if its to risky for someone with cardiac issues. In addition is it very costly?