A big debate is currently going on in the field of orthodontics. Unfortunately the discussion hasn't reached a lot of patients and their awareness of modern techniques available today is therefore very limited. One group of orthodontists claim that crooked teeth and malocclusions are hereditary and therefore can't be prevented http://www.drugoffice.gov.hk/gb/unigb/www.nylaserdentist.com/porcelain-crowns-and-bridges/