Mastication

Question 1

What food mastication imp

Answer 1

V imp for red meat and veg
Imp for white meat
Not very imp for fish, egg, bread

Question 2

What are the mech is of ingestion

Answer 2

Stage 1 transport for lips to cheek
Mastication
Stage 2 transport food form cheek to back of tongue
Swallowing

Question 3

What a re the mechanics of mastication

Answer 3

Jaw movements - chewing cycles
Tongue movements - direct, crush,mix food
Cheek movements - directing food
Lip movements - accept food, retain food, direct food

Question 4

How long is a chewing cycle

Answer 4

0.5 - 1.2 secs

Question 5

What are the pass of a chewing cycle

Answer 5

Opening , closing, occlusal phase

Question 6

Know vertical tooth sep

Answer 6

Graph showing
Open 
Fast close 
Slow close
ICP

Question 7

What are the masticatory chewing forces

Answer 7

Chewing forces - 70-150n dentate or 4-55n endentulous

Max clench force between molars 500-700n

Question 8

Know chewing cycle diagrams

Answer 8

Medial to lateral
Tough foods
Brittle foods
Abnormal x2

Question 9

What are the condylar head movements

Answer 9

During opening
Woking side - rotates vertical axis, move slight laterally Bennett move,
Non working - move down forward and medial Bennett angle

Question 10

What sit he sequnce of muscle activation for chewing

Answer 10

Mylohyoid 
Digrastic 
Lateral pterygoid 
Temporalis
Masseter
Medial pterygoid

Question 11

What is the central pattern generator

Answer 11

Hugher centres in cerebral cortex
Central neural pattern generator (Pons)
Masticatory muscle motorneurones
Masticatory muscles

Question 12

Role of mastication

Answer 12

breakdown foodstuffs 
Prep for swallow 
Increase sa for digestion 
Release of chem for sense of taste 
Stim saliva 
Growth and maintenance of orofacial tissues