export_chapter 6 dental physiology

Question 1

Equine Dental Physiology Ch 6

Answer 1

cards by Diane

Question 2

What do remants of blood supply to infundibula look like after eruption?

Answer 2

• one or two small holes in infundibula

Question 3

What are the muscles of mastication in the horse and what does each do?

Answer 3

• masseter
• temporalis (both close the jaw and pull it to the acting side)
• pterygoideus (close the jaw)
• anterior belly of digastricus (opens the jaw)
• geniohyoideus and genioglossus (open the jaw)

Question 4

What are the muscles of the cheek and lip and what nerve supplies them?

Answer 4

• levator and depressor labii maxillaris and mandibularis
• orbicularis ori
  incisivus mandibularis and amxillaris
• buccinator
• zogmatics muscles

Question 5

What is the angle of the condyles in plan view and in elevation view?
How is this reflected in the mouth?

Answer 5

• 15 degrees
• occlusal CT surface angles in both verticle and transverse
• angles of palatine ridges

Question 6

What is a loph?

Answer 6

Ridge- folded enamel

Question 7

What are phases of the equine chewing motion?

How is this different from other herbivores?

Answer 7

opening stroke, closing stroke, power stroke, post power recovery stroke
- most herbivores don’t have last stroke

Question 8

What is percentage of left sided v right sided v both sided chewers in the horse?

Answer 8

11 - both
41 right
32 left (counterclockwise)

Question 9

What happens during swallowing?

Answer 9

• food moved backwards in auger-like fashion
• collects in the oropharynx
• pharynx constricts
• soft palate elevates
• epiglottis retracts
• larynx contracts
• food moves through lateral food channels in teeth around larynx and into esophagus

Question 10

What is horse chew rate?

Answer 10

11 /sec