2.2b sinuses

Question 1

what is brachydont and hypsodont

Answer 1

Hypsodont - teeth with high crown and enamel that extends past the gumline

• Usually in herbivores

Brachydont - teeth with low crowns and relatively short root

• Carnivores, omnivores

Question 2

what are the 2 types of hypsodont

Answer 2

aradicular and radicular

Question 3

what is aradicular and radicular

Answer 3

Aradicular

• Lack a fixed root structure
• No true root

Radicular

• Teeth with true roots thar are anchored in the jawbone

Question 4

what are homodont and heterodont

Answer 4

Homodont - all the same type of teeth

Heterodont - different type of teeth (e.g. incisors, molar etc.)

Question 5

what are monophydont and polyphydont

Answer 5

Monophydont - one set that erupts (species that only have one set of teeth)

Polyphydont - multiple sets that erupt (species that replaces their teeth throughout life)

Question 6

what is contact surface and occlusal surface in dentition

Answer 6

• The contact surface is where adjacent teeth touch
• The occlusal surface is where opposing teeth touch

Question 7

what happen to gum through age in dogs and what is exposed

Answer 7

• Gum recede with age
• Exposes the non-enamel coated surface

Question 8

brachycephalic dogs teeth problems

Answer 8

• Brachycephalic dogs

○ Do not possess all canine cheek teeth

○ Often have teeth which have fused roots

• Roots of adjacent teeth become fused together

Question 9

horse teeth properties (5)

Answer 9

HORSE

• Continuous and considerable wear
• Surfaces enlarged of teeth
  
  • Help with grinding food
• Higher crown
  
  • Horses are hypsodont
  • The extra crown material is gradually exposed as the teeth erupt over time, compensating for wear
• Delayed development of the roots
  
  • This delayed development of the roots allows the teeth to continue to erupt and grow during the horse’s lifetime, compensating for the ongoing wear
• Complicated folding of enamel
  More strength

Question 10

properties of canines, incisors and premolars in horse teeth

Answer 10

Canines

• Rudimentary (underdeveloped)
• Size of root is greater than crown

Premolars

• Vestigeal
• Premolar and molar forms a continuous grinding surface
• Very high wear and erupt continuously
• Upper premolars wider then lower premolars

Incisors

• High crown
• Folded enamel surfaces

Question 11

properties of rodent teeth

Answer 11

• Reduced number of teeth
  
  • ## No canines and very large diastema (gaps between teeth)No pulp cavity
  • Hence teeth are insensitive
• No upper canines or incisors
  
  • Replaced by hard, fibrous dental pad
• Incisors do not erupt continuously

Diastema = gaps between teeth

Question 12

properties of pig teeth

Answer 12

• Incisors project rostrally
• Canines present as continuously erupting tusk for digging and tearing
• Premolar and molar have round cusps for crushing and grinding