Quiz 2 Review

Question 1

1. Dental Articulator - Usage

- Orients the relative relationship of the Max and Mand cast of a patient to what two things?

Answer 1

1. To one another (max to mand)

2. To the posterior determinants of occlusion

Question 2

1. Dental Articulator - Usage

- What properties of the mandible does it duplicate?

Answer 2

Duplicates the functional and border movements of the mandible

Question 3

2. Nonadjustable Articulator
   - Are adjustments possible?
   - Allows for ___ movements within limitations of the instrument
   - Cannot duplicate what?
   - Sometimes referred to as a “___”?
   - What is the only reproducible contact position?

Answer 3

1. No, no adjustments
2. Allows for eccentric movements
3. Cannot duplicate a patient’s specific movements
4. “Barn door hinge”
5. Closed occlusal contact position (in MI or ICP)

Question 4

3. Semi-adjustable Articulator (pros vs cons)
   - Provides a significant advantage in replicating the patient’s “___”
   - Excellent for routine ___
   - More ___ in order to be effective (info must be transferred from patient to articulator)
   - More ___ (cheap/expensive) than nonadjustable

Answer 4

1. Patient’s specific condylar movement
2. Dental treatment
3. Time consuming
4. Expensive

Question 5

4. Nature of Occlusal Prematurities
   - These are recorded/recognized as a “___” contact, before the patient closes all the way into ___
   - First tooth contact in ___ is a good example of an occlusal prematurity

Answer 5

1. High ; Maximum Intercuspation

2. Centric Relation (CR)

Question 6

4. Nature of Occlusal Prematurities
   - The term prematurity implies that the contact is either on an ___ or is in an area that is considered ___
   - None of these contacts are proper ___ occlusal contacts
   - Mandible can be displaced ___ and/or ___ from ideal position

Answer 6

1. Incline / Unstable
2. Maximum Intercuspation (MI)
3. Anteriorly/Laterally

Question 7

5. A patient presenting with an occlusal prematurity on the Triangular ridge of the distal lingual cusp of mandibular first molar has what kind of interference?

Answer 7

Working interference

Question 8

6. Normal Closure - Muscles Involved
   - During Mand closure close to Max Intercuspation, what muscles of mastication contract?
   - What muscles relax?

Answer 8

Contract: Posterior and Middle Temporalis

Relax: Inf and Sup belly of Lateral Pterygoid

Question 9

7. Diff. Diagnosis of Clicking of Articular Disk
   - Click that occurs at initiation of translation of condyle?
   - Click that occurs just prior to termination of opening in patients with anteriorly displaced disks?
   - An aberrant structure of the articular disk?

Answer 9

1. Early opening click
2. Late opening click
3. Deviation in form

Question 10

8. Diff. Diagnosis of Clicking of Anterior Disk
   - Portion of articular dsk that is displaced to the anterior?
   - Generic displacement of the articular disk at rest, which resolves upon mand. opening (clicks back in)
   - Generic displacement of the articular disk at rest, which does not resolve upon mand. opening (no clicking)

Answer 10

4. Partial disk displacement
5. Disc displacement with reduction
6. Disc displacement without reduction

Question 11

9. Procedures utilizing a Nonadjustable Articulator
   - Arbitrary mounting procedures used for what two purposes?
   - Casts are located ___ between the Max and Mand components of the articular
   - Casts held together with the teeth in what contact position?
   - Any bite registration material that allows the teeth to resparate will result in what?

Answer 11

1. Locate and fix the casts
2. Equidistant
3. Max Intercuspation (MI)
4. Results in inaccurate replication of the intercuspal position (ICP)

Question 12

10. Bennett Angle Pathway
    - In the skull, the pathway the condyle descends during protrusive and laterotrusive movements is generally ___.
    - Can semiadjustable articulators be used to replicate this movement?

Answer 12

1. Generally curved

2. No, they cannot. Semiadjustable articulators are limited to providing only a straight pathway.

Question 13

11. What three procedures are necessary to use the fully adjustable articulator properly and effectively?

Answer 13

1. An exact hinge axis location of the condyles for the facebow
2. A pantographic recording
3. A CR occlusal record

Question 14

12. Selection of an Articulator

- What two factors determine mandibular movement?

Answer 14

1. Posterior controlling factors (TMJ)

2. Anterior controlling factors (anterior teeth)

Question 15

12. Selection of an Articulator

- A patient’s adequate and immediate anterior guidance tooth contacts will dominate and control what?

Answer 15

1. Mandibular movement

Question 16

13. Occlusal Prematurities - Obj & Goals
    - Understand the location of occlusal prematurities during ___
    - Recognize the locations of ___, ___, & ___ premature occlusal contacts
    - Recognize the ___ positions as a result of either working or non-working premature occlusal contacts

Answer 16

1. Normal closure
2. Working side, non-working side, and protrusive
3. Condylar

Question 17

14. Occlusal Prematurities - Obj & Goals
    - Identify which ___ of mastication are affected by working, non-working, and protrusive premature occlusal contacts
    - Know which side that the ___ (mand/max) deviates whenever a working, non-working, or protrusive occlusal prematurity is present

Answer 17

1. Muscles

2. Mandible

Question 18

15. A patient with an occlusal prematurity at triangular ridge of Facial cusp of Mand 2nd Molar has what kind of interference?

Answer 18

Non-Working Interference

Question 19

15. A patient with an occlusal prematurity at Mesial Marginal Ridge of Max First Premolar has what kind of interference?

Answer 19

Protrusive inference

Question 20

16. Closure Interference - Tooth/Jaw Positions
    - If a patient has a premature contact or a closure interference that involves direct contact with triangular ridge of mesiofacial cusp of Max first molar and the facial ridge of the Mesiofacial cusp of Mand first molar, which clinical condition (contact) will be noted?
    - Mand or Max deviation?
    - To which side?

Answer 20

1. “A” contact
2. Displaying mandibular deviation
3. To opposite side of the premature contact

Question 21

17. Lateral Displacement of the Mandible
    - If a patient has a premature contact/closure interference that involves direct contact with the triangular ridge of the mesiolingual cusp of the Max first molar and the triangular ridge of the Mesiofacial cusp of the Mand first molar, which clinical conditions are noted?
    (What kind of contact and deviation to which side?)

Answer 21

1. Premature “B” contact

2. Condyle will deviate to same side

Question 22

18. Basic Terms of TMD Function and Dysfunction
19. Articular Disc Displacement - A physical ___ of the articular disc, either anterior or posterior to the ___ of the condyle
20. Intracapsular TMD - Problems and clinical conditions associated with the TMJ that are contained within the ___

Answer 22

1. Displacement/dislocation ; Head

2. Capsular apparatus

Question 23

18. Basic Terms of TMD Function and Dysfunction
19. Closed Lock - An internal derangement of TMJ in which art disk is dislocated ___ (ant/post) and usually medially to the ___.
20. Reciprocal clicking - A popping sound from art disc, exhibiting as a forceful ___ or ___ over the head of the condyle
21. What term is used to describe a # of different common painful states characterized by the presence of trigger points within the muscle?

Answer 23

3. Anteriorly; Condyle
4. Jumping back or Snapping
5. Myofacial Pain Dysfunction Syndrome

Question 24

19. Terms for Internal Derangements
    - Normal - Articular disk is located properly over the ___ of condyle
    - Displacement - Only a ___ of articular disk is anterior
    - Dislocation - Articular disk is completely ___ positioned

Answer 24

1. Head
2. Portion
3. Anteriorly

Question 25

20. Disc Dislocation w/o Reduction
    - Also known as “___ ___”
    - Disc positioned ___ (ant/post)
    - Does realignment occur?
    - Any popping or clicking (joint noises)?
    - Full or limited opening?

Answer 25

1. Closed lock
2. Anteriorly
3. Realignment does NOT occur
4. No popping or clicking - no joint noises
5. Limited opening