Final Exam 18-34 Diewitt

Question 1

17. Non-Functional Diagram - Mandible

- Be able to identify movement or to which side for movements (see practical for details)

Answer 1

Possible answers:

• Movement: Protrusive, Left Lateral, Right Lateral, or Lateral Protrusive
• Side: Left or Right

Question 2

18. Abfraction
    - Mechanism that explains the loss of ___ and ___ caused by flexure and ultimate material fatigue of susceptible teeth at locations ___ (away from/at) the point of loading
    - Breakdown is ___ (dependent/independent) of the magnitude, duration, frequency, and location of the forces

Answer 2

1. Dentin tissue and tooth enamel; away from

2. Independent

Question 3

19. During a Right lateral movement, what terms can be applied for the patient’s left hand side?

Answer 3

1. Translating
2. Mediotrusive
3. Balancing
4. Orbiting

Question 4

19. During a Right lateral movement, which terms can be applied for the patient’s right hand side?

Answer 4

1. Rotating
2. Laterotrusive
3. Working
4. Function

Question 5

20. Working/Centric Cusps & Pathways
    - Mesiolingual cusp of Max Left 2nd Molar would escape/pass over what structures of the mandible during lateral movements?

Answer 5

Triangular Ridge and Distal Facial cusp of the Mand left 2nd Molar

Question 6

21. Border Movements of the Mandible
    - Defined as the extreme anatomical limits of mandibular movements in all ___ (two/three) reference planes
    - The muscles, teeth, and primarily the ___ determine the extent to which the mandible is allowed to move
    - A device is needed to capture the dynamic positioning of the ___ in all ___ (two/three) reference planes

Answer 6

1. Three
2. Ligaments
3. Mandible; Three

Question 7

22. Pantographic Tracings
    - Tracings are captured and depicted in each plane of reference in what three locations?
    - How many tracing plates can be obtained from using all three locations?

Answer 7

1. Both condyles and the mand incisors

2. Nine

Question 8

23. Border Movements in Sagittal Plane
    - Which of these locations are best determined due to minimal tonus of the musculature?

(Choose from: CR, MI, ETE, MP, MOA, MO, RP, CL)

Answer 8

Rest position or Postural Position of the Mandible

All others, the muscles are involved

Question 9

24. Border Movements in Horizontal Plane
    - Which three positions do not have tooth contact?

(Choose from CR, MI, ETE, MP, ERL, ELL, RP, VCA, HCA)

Answer 9

1. Vertical Chewing Arch
2. Horizontal Chewing Arch
3. Rest Position

Question 10

25. Condylar Guidance Angle
    - If condylar guidance was the only vertical Determinant of Occlusion, the cusp angles would need to be ___ (greater/less) than the angle of the articular eminence in order to avoid ___ in eccentric movements

Answer 10

1. Less

2. Collision

Question 11

26. Anterior Guidance
    - The incisal edges of the mand. anterior teeth ___ (strongly & actively /lightly & passively) occlude with the lingual surface of the max anterior teeth in what position?

Answer 11

1. Lightly (passively)

2. Maximum intercuspation (MI)

Question 12

26. Anterior Guidance
    - The steepness of the lingual surfaces of the max ant teeth determine the amount of ___ (vertical/horizontal) movement of the mandible

• Ant guidance is considered to be a ___ (variable/fixed) factor. It ___ (can/can’t) be altered restoratively, orthodontically, or surgically

Answer 12

1. Vertical
2. Variable
3. Can

Question 13

27. Vertical Overlap Changes
    - As the amount of Vertical Overlap increases, the ant guidance angle ___ (increases/decreases)

• Vertical Overlap increase results in __ (more/less) of a vertical component to mand movement and the potential for ___ (steeper/shallower) posterior cusps

Answer 13

1. Increases
2. More
3. Steeper

Question 14

28. Mand Movement when PCF and ACF are not identical

- The nearer a point is to a controlling factor, the ___ (more/less) its movement is controlled by that factor

Answer 14

More

Question 15

29. Plane of Occlusion - Effect on Cusp Height
    - The plane of occlusion is a ___ (fixed/variable) determinant of ___ morphology. The clinician can change the nature and position of the occlusal plane.

Answer 15

1. Variable Vertical

2. Occlusal

Question 16

30. Curve of Spee
    - Variable or fixed?
    - The longer the radius, the more ___ (flat/curved) the Curve of Spee

Answer 16

1. Variable

2. Flat

Question 17

31. If the Temporalmandibular Ligament of the working side condyle is tight and the non-working condyle is close to the ___, a pure arcing movement is made and no ___ translation of the mandible occurs

Answer 17

1. Medial wall of the fossa

2. Lateral

Question 18

31. Typically, the temporalmandibular ligament is loose, resulting in space present between the non-working condyle and the medal wall of the fossa.

When this occurs, the non-working condyle tends to move ___ towards the medial wall of the fossa and produces ___ ___ ___ movement

Answer 18

1. Medially

2. Mandibular Lateral Translation

Question 19

32. Immediate Mandibular Translation
    - Immediate sideshift: When the initial mandibular ___ translation movement occurs before the ___ translate from the fossa

• Progressive sideshift: The progressive lateral translation movement of the condyle in a ___, ___, and ___ direction

Answer 19

1. Lateral
2. Condyle
3. Downward, forward, and medial

Question 20

32. Immediate Mandibular Translation
    - The greater the immediate sideshift, the ___ (taller/shorter) the posterior cusps must be and the ___ (wider/narrower) the opposing fossae and grooves

• Immediate Sideshift + Progressive Sideshift = ___?

Answer 20

1. Shorter
2. Wider
3. Bennett Movement

Question 21

33. Lateral Displacement of the Mandible
    - Direct contact between Max Lingual to Mand Facial Cusp results in what type of Premature Contact (A or B)?

• Premature ___ (A/B) contacts will display the condyle on the ___ (same/opposite) side deviating laterally. The condyle on the opposite side of the interference is ___ (anterior/posterior) to the CR position

Answer 21

1. B
2. B
3. Same
4. Anterior