Test 1.1

Question 1

What does OOP stand for?

Answer 1

Outer oblique portion

Question 2

what function does the OOP provide?

Answer 2

Limits normal rotational opening movement

Question 3

What does IHP stand for?

Answer 3

Inner horizontal portion

Question 4

what function does the IHP perform?

Answer 4

Limits posterior movement of condyle and discs

Question 5

The relationship of the ______ ____ of the _____ and the ______ ____ muscle on one side establishes the _____-_____ _______ of the mandible at centric relation

Answer 5

Medal pole of the condyle, medial pterygoid, mid-most position

Question 6

What makes the NORMAL CURVE of the occlusion possible?

Answer 6

The interaction of the medial pole of the condyle with the steep medial wall of the fossa prevents the mandibular POSTERIOR teeth from the moving straight horizontally tword the midline

Question 7

T of F, Centric relation is a CONDYLAR POSITION, and DOES NOT NEED ANY TOOTH contact to be obtained.

Answer 7

TRUE

Question 8

The centric relation establishes the postion of the condyle in a _______ and _______ location with the disc properly interposed between the ______ and the _______ _____

Answer 8

Superior and anterior, condyl, temporal bone

Question 9

In what location in the centric relation articulated on?

Answer 9

Thin portion

Question 10

What is the most stable position of the condyle?

Answer 10

Centric relation

Question 11

Centric relation is a position of the mandible where the musculature displays _______ ____

Answer 11

Minimal tonus

Question 12

what are the 6 clinical condition in maximum intercuspation

Answer 12

1) TEETH determine the occlusal position
2) If centric relation and maximum intercuspation do not coincide, the patient will have a “SLIDE”
3) Most patients have some degree of a slide from centric relation into maximum intercuspation (it is approximately 1-2 mm IN LENGTH)
4) Maximum intercuspation is SIMULTANEOUS CONTACT of all the teeth and is the “ENDPOINT” of the SLIDE.
5) All occlusal forces should be CONCENTRATED DOWN the LONG AXIS of POSTERIOR TEETH
6) The maximum intecuspation position is DYMAMIC IN NATURE and WILL CHANGE throughout the patients life.

Question 13

what is a perafunctional activity of the temporalis

Answer 13

Clenching of the teeth when to muscle is overused

Question 14

what are the normal functional activities of the temporalis

Answer 14

• Elevate the mandible
• retract and retrude the mandible
• position the mandible to obtain centric relation

Question 15

T of F The temporalis is normally involved with producing lateral movement of the mandible

Answer 15

False, not normally involved

Question 16

What are the actions of the superior head of the lateral pterygoid muscle?

Answer 16

• Maintain a sustainable and consistent position of the articular disc
• Progressively active during closing movement of the mandible
• works in concert with the action and inactivity of the inferior head of the lateral pterygoid
• Deep placement, mostly covered by the medial pterygoid, but portions of the muscle CAN BE PALPATED

Question 17

What muscle frequently displays a spasm as a result of some types of occlusal dysfunction

Answer 17

Lateral pterygoid

Question 18

Functions of the mylohyoid muscle

Answer 18

• Slightly depresses the mandible
• Elevate the Hyoid, floor of the oral cavity, and the tongue
• Important during speaking and swallowing

Question 19

what action take place in normal jaw opening movement - LATE

Answer 19

• Inferior head of the lateral pterygoid is aat MAXIMUM point of CONTRACTURE
• Condyle has moved as far to the ANTERIOR as it can possibly move.
• The articular disc has rotated POSTERIORLY over the POSTERIOR PORTION of the head of the condyle
• the SUPERIOR retrodiscal tissues are in MAXIMUM TAUTNESS and cannot further hold the articular disc in position over the head of the condyle without either stretching or tearing

Question 20

Anterior, middle and posterior temporalis force vector from the frontal plane

Answer 20

Superior

Question 21

Masseter force vector from the frontal plane

Answer 21

superior

Question 22

Medial pterygoid muscle force vector in the frontal plane

Answer 22

superior and slightly medial (mediotrusive)

Question 23

Inferior head of the lateral pterygoid muscle force vector in frontal plane

Answer 23

anterior and medial (slightly mediotrusive)