1) humans have how many sets of teeth? a) 2 b) 3 c) 4 d) none of the above 2) adults have how may permanent teeth? a) 22 b) 32 c) 42 d) 52 3) what type of food products make teeth stronger? 4) what is the visible part of the tooth? a) pulp b) enamel c) crown d) both b and c 5) what part of the tooth is harder than bone? a) pulp b) crown c) enamel d) dentin 6) what part of the tooth is soft and contains the nerves? a) pulp b) crown c) dentin d) root 7) what refers to the alignment of the teeth? 8) the lower teeth protect what? a) top teeth b) lips c) jaw bone d) tongue 9) malocclusion is the least common reason for referral to orthodontists. true false 10) usually, malocclusion is hereditary. true false 11) which type of malocclusion is commonly referred to as an overbite? 12) bacteria are living organisms than cause cavities. true false 13) what is the whitish film that grows on your teeth called? 14) what is the best fighter of cavities? gingivitis is the inflammation of the a) gums b) teeth c) tongue d) jawbone 16) gingivitis is permanent. true false 17) name 2 ways to fight gingivitis. 18) the cause of gum disease is a) heredity b) bacteria c) food d) fungus 19) untreated, periodontitis will progress until your teeth loosen and fall out. true false thx you if u answer