I'm 37, female. Post crown fitted to upper front central incisor snapped at gum line. I believe that it failed due to my bad overject/overbite, was advised that this was not the cause. 2 lower 1st molars extracted recently due to old infection. In order to make my teeth meet to chew, my lower jaw is forced back more than ever which causes strain on it. Will dental implant fail like the crown did? I was advised that orthodontics treatment is not necessary. Dental implant/other viable option?