2.2b sinuses Flashcards
what is brachydont and hypsodont
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
what are the 2 types of hypsodont
aradicular and radicular
what is aradicular and radicular
Aradicular
- Lack a fixed root structure
- No true root
Radicular
- Teeth with true roots thar are anchored in the jawbone
what are homodont and heterodont
Homodont - all the same type of teeth
Heterodont - different type of teeth (e.g. incisors, molar etc.)
what are monophydont and polyphydont
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)
what is contact surface and occlusal surface in dentition
- The contact surface is where adjacent teeth touch
- The occlusal surface is where opposing teeth touch
what happen to gum through age in dogs and what is exposed
- Gum recede with age
- Exposes the non-enamel coated surface
brachycephalic dogs teeth problems
- Brachycephalic dogs
○ Do not possess all canine cheek teeth
○ Often have teeth which have fused roots
- Roots of adjacent teeth become fused together
horse teeth properties (5)
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
properties of canines, incisors and premolars in horse teeth
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
properties of rodent teeth
- 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
properties of pig teeth
- Incisors project rostrally
- Canines present as continuously erupting tusk for digging and tearing
- Premolar and molar have round cusps for crushing and grinding
