Midterm Questions from Drive 2 Flashcards Preview

Occlusion > Midterm Questions from Drive 2 > Flashcards

Flashcards in Midterm Questions from Drive 2 Deck (54):
1

plane of occlusion

lines connecting cusp tips and incisal edges

2

arch length

distal 3M to distal 3M of each arch; MX > MD

3

which arch has greatest width?

MX > MD

4

supporting/centric cusps

MD buccal and MX lingual

5

guiding/non-centric cusps

MD lingual and MX buccal

6

each tooth occludes with 2 opposing teeth EXCEPT?

MD CIs and MX 3Ms

7

Mesial step relationship between MD and MX 1Ms?

*permanent MD 1M is mesial to MX 1Ms
*MB cusp of MX 1M is in the buccal groove of MD 1M

8

curve on monson

spherical curve of approximately 8" resting on buccal cusps of mandibular posterior teeth

9

MD vs MX posterior crown tilts?

*MD= lingual
*MX= buccal

10

skeletal components?

condyle and articular eminence
*condylar path determined by articular eminence

11

1) class 1
2) class 2
3) class 3

1) MX MB cusp in MD B groove
2) retruded mandible= MX MB cusp is mesial to MD B groove
3) protruded mandible= MX MB cusp distal to MD B groove

12

Class 2 division 1 vs division 2?

*1= MX incisors in normal position
*2= MX incisors retruded and inclined lingualy

13

working vs non-working side of mouth

*working= side that mandible moves towards
*non-working= side which mandible moves away from

14

Masseter A, O, and I?

A- elevates mandible
O- zygomatic arch
I- coronoid process and anterior border of ramus

15

temporalis A, O, and I?

A- elevates mandible
O- pterygoid fossa
I- coronoid process and anterior border of ramus

16

medial pterygoid A, O, and I?

A- elevates, protrudes, and mediotrusive (unilateral) mandible movement
O- pterygoid fossa
I- medial angle of mandible

17

lateral pterygoid Superior Head A, O, and I?

A-
O- greater wing
I- capsule and disc and neck of condyle

18

lateral pterygoid Inferior Head A, O, and I?

A- protrude (bilateral) and mediotrusive (unilateral)
O- lateral pterygoid plate
I- neck of condyle

19

Anterior belly of Digastric

A- depress/pull mandible back and elevates hyoid when mandible is stable(swallowing)
O- digastric fossa
I- middle tendon at hyoid

20

Posterior belly of Digastric

A- depress/pull mandible back and elevates hyoid when mandible is stable(swallowing)
O- mastoid notch
I- middle tendon at hyoid

21

motor unit with few or a lot of fibers? muscles examples?

motor unit= motor neuron and # of muscle fibers it innervates
*few= precise movement (lateral pterygoid)
*more fibers= gross function (masseter)

22

stretch/myotactic reflex? determines what?

causes contraction when a sudden forces stretches them
***determines muscle tonus

23

What is the computer board of brain? does what?

CNS= thalamus= controls and directs signals from cortex

24

primary pain

site and source of pain are the SAME
(heterotropic pain has different site and source)

25

TMJ innervated by? BS?

innervated by auriculotemporal nerve and BS is superficial temporal, middle meningeal artery, and maxillary artery

26

functional vs accessory ligaments examples

*functional= collateral, capsular, temporomandibular
*accessory= sphenomandibular, stylomendibular

27

articular disc attaches?

posteriorly to retrodiscal tissue and anteriorly to capsular ligament

28

what forms sling?

medial pterygoid forms sling with masseter laterally

29

denture bite force compared to normal?

1/4 of natural teeth

30

tongue thrusting

habit where tongue pushes excessively against incisors when swallowing, causes flaring of teeth

31

occlusal table

*occlusal surfaces of teeth
*between B and L cusp tips of posterior teeth
* ~50-60% of BL width of tooth

32

buccoocclusal (BO) line vs linguooclusal (LO) line vs central fossa (CF) line?

*BO= line through all buccalcusp tips of MD posterior teeth
*LO= line through all lingual cusp tips of MX posterior teeth
*CF= line though central grooves of MX and MD teeth

33

centric cusps contact?

the opposing central fossa line in central fossa areas

34

what do lingual and buccal embrasures do? which is better?

lingual> buccal
**guide food towards tongue

35

nociceptor, proprioceptors, interoceptors?

*nociceptor- pain
* proprioceptors- position and movement
* interoceptors- internal organ

36

muscle spindles do what?

monitor length within skeletal muscle

37

golgi tendon organ does what?

monitors muscle tension

38

pacinian corpuscle does what?

movement and firm pressure?

39

retrodiscal ligament does NOT?

stretch

40

isotonic vs isometric?

*isotonic= shortening under load
*isometric= contract without shortening

41

controlled relaxation vs eccentric contraction?

*controlled relaxation= lengthening with decreases motor unit stimulation
*eccentric contraction= lengthening while contracting simultaneously

42

central pattern generator (CPG)?
It's two phases?

higher centers in brain that control the activity of the specific muscle involved in chewing stroke
1) opening= mandible drops, then moves laterally
2) closing= crush and grind, buccal cusps of MX and MD are aligned then teeth guided to MI

43

central pattern control

breathe, walk, chew; brain stem

44

central excitatory effect

deep pain input to CNS, stimulates non-associated neurons

45

spinal tract recieves info from?

receives periodontal and pulpal afferent (from trigeminal nerve)

46

reticular formation influences?

on pain

47

describe the two reflex arches?

stimulus response
1) myotactic- causes contraction with stretched
2) nociceptive- protective; biting hard, causing mandible to drop quickly

48

reciprocal innervation controls?

antagonistic muscles

49

regulation of muscle activity?

gamma efferent system

50

secondary hyperalgesia?

increased tissues sensitivity without local cause

51

overjet vs overbite vs open bite?

*over-jet= horizontal
*over bite= vertical
*open bite= no contact

52

gliding contact

passing of cusp inclines

53

tall cusps and deep fossae = ____ chewing stroke?

vertical

54

worn and flat teeth= ____ chewing stroke?

broader