Final Exam 1A

Question 1

The position of the TMD ligament is designed to limit the ______ movement of the mandible?

Answer 1

pure hinge axis rotational movement

Question 2

The full length of the TMD ligament occurs at no more than _____ mm of opening.

Answer 2

15-20 mm

Question 3

The TMD ligament has a pivot point at this 15-20 mm of opening at which the movement of the mandible commences ______.

Answer 3

translation

Question 4

Thickest portion of TMD ligament?

Answer 4

posterior

Question 5

Most of the articular disc mandibular movement occurs where?

Answer 5

intermediate zone (thinnest)
anterior region

Question 6

Retrodiscal tissue is ____, ______, and ______.

Answer 6

elastic
highly innervated
vascular

Question 7

If we place significant force (loading) on retrodiscal tissue, it can be what?

Answer 7

painful

Question 8

Any type of trauma can cause _____ on retrodiscal tissue?

Answer 8

inflammation

Question 9

Max. Int. = For angle class 1 occlusion, the ___ and ____ have an important relationship.

Answer 9

first molars

canines

Question 10

For MI, there must be ____ overlap.

Answer 10

adequate

Question 11

For MI, occlusal forces should be exerted down ____ of _____ teeth.

Answer 11

the long axis

posterior

Question 12

For MI, there must be ______ contact of all (what teeth)?

Answer 12

simultaneous

maxillary & mandibular

Question 13

For MI, _____ teeth should dominate over the ____ teeth.

Answer 13

posterior

anterior

Question 14

For MI, anterior teeth should display _____ occlusal contact.

Answer 14

passive

Question 15

For MI, There should be ____ occlusal contacts on ___ teeth that adequately distribute forces.

Answer 15

multiple

all

Question 16

2 actions of the temporalis are?

Answer 16

retract/retrude mandible

obtain centric relation

Question 17

Medial Pterygoid primary muscle to produce _____ movement.

Answer 17

mediotrusive

Question 18

Superior head of lateral pterygoid is ____ during what movement of the mandible?

Answer 18

progressively active during closing movement

Question 19

Superior head of lateral pterygoid frequently displays ____ as a result of ____.

Answer 19

a spasm

occlusal dysfunction

Question 20

What 3 muscles contract during normal closure of the mandible?

Answer 20

anterior fibers of temporalis
medial pterygoid
masseter

Question 21

For normal closure of the mandible, the condyle will be located primarily where?

Answer 21

within the glenoid fossa

Question 22

What 2 muscles relax during normal closure of the mandible?

Answer 22

suprahyoids

infrohyoids

Question 23

What will contract to hold the cranium in place during normal closure of the mandible?

Answer 23

posterior neck musculature

Question 24

Name the factors influencing the arch alignment of the teeth.

Answer 24

MR MOMS Fractured Pears
Maxillary & mandibular arch size
Rotated or ectopically-positioned teeth
Missing teeth
Occlusal contacting relationships
Musculature
Severely carious teeth
Fractured cusps
Parafunctional activity

Question 25

What 2 teeth are in alignment to the maxillary second molar? (Tooth 7)

Answer 25

mandibular second & third molar (Teeth 7 & 8)

Question 26

Occlusal forces placed on ____ teeth are intended to go ____ the long axes of the roots.

Answer 26

posterior | up & down

Question 27

Cusp-Fossa relationship of posterior teeth: Cusp Schema = ?

Answer 27

maxillary lingual cusps & mandibular facial cusps

Question 28

Cusp-Fossa relationship of posterior teeth: preferred name?

Answer 28

centric

Question 29

Students should envision the _____ and maximum intercupsation positions as ____ when attempting to describe ideal tooth positions.

Answer 29

centric relation | coincident

Question 30

On each individual tooth there are ____ locations of where occlusal contacts ______ placed when the mandible has completely closed against the maxilla.

Answer 30

precise | should be

Question 31

Tooth contact should be ____, _____, and _____.

Answer 31

precise minimal short-lasting

Question 32

The arches should ____ the contact and then ____ or ____ from each other, when movement _____.

Answer 32

receive release or disengage commences

Question 33

Many contacts are _____, in that there are strategically ____ in each collective arch that determine the most optimal locations of stationary occlusal contact.

Answer 33

anatomically-driven | better locations

Question 34

Non-centric cusps (mandibular): _____ cusp of the mandibular second molar = lingual _____ between the maxillary ____ and ____.

Answer 34

mesiolingual | first and second molars

Question 35

Non-centric cusps (maxillary): _____ cusp of the maxillary _____ = _____ on the mandibular ____ OR ____ between the ______

Answer 35

``` Distofacial first molar distofacial groove first molar the facial embrasure mandibular molars ```

Question 36

Pathway of mandibular cusps positioned over the maxillary teeth: where is the lateral protrusive?

Answer 36

located at 45 degree angle between protrusion and working movements

Question 37

Left non-working movement travels _____.

Answer 37

mediotrusive

Question 38

The distolingual mandibular first molar cusp sits where in maximum intercupsation?

Answer 38

lingual sulcus or groove of the maxillary 1st molar

Question 39

On the mandible, if you have right-sided movement occurring on the left side, what working movement do you have?

Answer 39

left non-working movement (mediotrusive)

Question 40

The DL mandibular 1st molar exits and travels in what direction?

Answer 40

moving diagonally toward the anterior portion of the palate, away from maxillary posterior teeth