Lab Exam

Question 1

ADD SAGITTAL PLANE MOVEMENTS

Question 2

TWO HEADS (almost 2 separate muscles)

Answer 2

Lateral Pterygoid

Question 3

Answer 3

Chewing Stroke

Question 4

Identify:

Answer 4

Centric Relation

Question 5

What is this? Why Use?

Answer 5

Custom Anterior Guide Table

–Used to preserve pt’s anterior guidance when restorations are done on the anterior teeth

Question 6

Answer 6

Anterior Guidance

Question 7

Answer 7

Masseter

Question 8

ORIGIN
* TEMPORAL FOSSA and
LATERAL SURFACE OF THE SKULL
I
NSERTION
* CORONOID PROCESS and
* ANTERIOR BORDER OF
ASCENDING RAMUS

ACTION
* ANTERIOR – MANDIBLE IS RAISED VERTICALLY
* MIDDLE – ELEVATES AND RETRUDES THE MANDIBLE
* POSTERIOR – AIDS IN RETRUSION OF THE MANDIBLE

Answer 8

Temporalis

Question 9

Which number/letter is associated with max opening?

Answer 9

III

Question 10

ID:

Answer 10

Rotation

Question 11

Question 12

Answer 12

Axial Reduction
0.5-1.0mm

Question 13

What color arrow represents the non-working pathway?

Answer 13

brown

Question 14

Answer 14

working

Question 15

ID the contact and what position cast was mounted in

Answer 15

Centric Occlusion Contact; Centric Relation

Question 16

What is this and what is it used for?

Answer 16

Leaf Gauge
–identify first point of contact when making a CR record

First contact when leaf gauge is in place on the anterior teeth: Centric Occlusion Contact

Question 17

Answer 17

Functional Cusp Bevel
1.5mm tapers to 1.0mm

Question 18

ID:

Answer 18

Rotation and Translation

Question 19

An unwanted or premature interocclusal contact

Answer 19

Occlusal Interference

Question 20

The chewing stroke starts at the MIP and
drops downwards and forwards to the position of desire opening.
* It returns in a straighter pathway slightly
posterior.

Which letter/number is associated with the chewing stroke?

Answer 20

H

Question 21

Answer 21

Morphologic Occlusal reduction
–Functional Cusp: 1.5mm
–Central Fossa: 1.5mm
–Non-functional cusp: 1.0mm

Question 22

ORIGIN Posterior border of styloid process
INSERTION Body of the hyoid bone

Answer 22

Stylohyoid

Question 23

What would be the reason to do the steps in this picture?

Answer 23

Verify occlusal clearance

Question 24

–Also called PREMATURE CONTACT
– A premature contact that occurs when the
condyles are manipulated into CR

Answer 24

Centric interference

Question 25

ID:

Answer 25

PRP....Interocclusal Space shown

Question 26

Answer 26

Curve of Spee - Antero-posterior* curvature of the occlusal plane - Concave in the mandible, Convex in the maxilla

Question 27

Answer 27

Canine Guidance

Question 28

ID: what type of interocclssal record is being made here?

Answer 28

CR

Question 29

Answer 29

Anterior Guidance

Question 30

Answer 30

Group Function

Question 31

Answer 31

Centric Interference

Question 32

Answer 32

Working Side interference

Question 33

ID: Use?

Answer 33

Envelope of Motion - Three-dimensional - Combination of border movements in all 3 planes: I. sagittal II. horizontal III. frontal - The envelope differs from person to person but it has the same characteristic shape -The superior surface of the envelope is determined by the tooth contacts -The other borders are primarily determined by the TMJ anatomy and the ligaments

Question 34

Identify

Answer 34

Maximum Intercuspation: All the teeth contact in a stable way.

Question 35

ORIGIN: line from the last molar root to the mandibular symphysis INSERTION: median raphe from chin to hyoid bone and hyoid bone

Answer 35

Mylohyoid

Question 36

ORIGIN * Pterygoid fossa INSERTION * Medial surface of the mandibular angle ACTION * ELEVATES the mandible * PROTRUDES the mandible * UNILATERAL contraction results in mediotrusion

Answer 36

Medial Pterygoid

Question 37

Answer 37

Non-working side interference

Question 38

What is this and what is it used for?

Answer 38

Anterior Deprogrammer Jig --Used to relax muscle before taking a CR record

Question 39

Answer 39

Temporalis

Question 40

ID: CO

Question 41

Which numbers correspond to: --CR --MIP

Answer 41

CR: 1 MIP: 2

Question 42

ORIGIN: Inferior genial tubercle on the inner surface of mandibular symphysis INSERTION: Anterior surface of body of hyoid bone

Answer 42

geniohyoid

Question 43

-ELEVATES THE MANDIBLE -PROVIDING THE FORCE FOR CHEWING -SUPERFICIAL HEAD: AIDS IN PROTRUSION -DEEP HEAD: STABILIZES THE CONDYLE AGAINST THE EMINENCE O: Zygomatic Arch I: Lateral surface of ramus and angle of mandible

Answer 43

Massester

Question 44

ORIGIN * The posterior belly, longer than the anterior, arises on the inferior surface of the skull, from the medial surface of the mastoid process * The anterior belly arises from a depression on the inner side of the lower border of the mandible, close to the symphysis INSERTION Hyoid bone

Answer 44

Digastric

Question 45

ORIGIN * Outer surface of the lateral pterygoid plate. INSERTION * Neck of the condyle. EXTENTION * Backward, upward, and outward. ACTION * BILATERAL CONTRACTION: Causes the condyles to be pulled down the articular eminences and the mandible is protruded. * UNILATERAL CONTRACTION: Causes mediotrusive movement (Downward, forward, and medially) **depresses mandible**

Answer 45

Inferior Lateral Pterygoid

Question 46

ID the plane and each movement

Answer 46

## Footnote Frontal Plane

Question 47

Answer 47

Protrusive Interference

Question 48

ORIGIN * infratemporal surface of the greater sphenoid wing INSERTION * disk, capsule, and neck of the condyle ACTION Inactive during mandibular opening Active only with elevator muscles (closure of the mandible) Power stroke: the inferior lateral pterygoid is especially active during mandibular closure against resistance (chewing or clenching)

Answer 48

Superior Lateral Pterygoid

Question 49

Answer 49

Chamfer Margin 0.5mm

Question 50

ID the malocclusion:

Answer 50

Class 3 Prognathic