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Flashcards in Final Deck (60):
1

Where does the ML cusp of the MX 1M occlude in a Class 1 occlusal relationship?

Central fossa of the MD 1M

2

In a class 3 occlusal relationship where does the MB cusp of the MX 1M occlude?

Embrasure space between the MD 1M and 2M

3

Which acronym applies to posterior tooth contacts in protrusive MD movement?

DUML

4

Which statement best describes the tooth contact in a left working side laterotrusive MD movement?

The inner inclines of the MX buccal cusps oppose the outer inclines of the MD buccal cusps

5

What are the three types of rotational MD movements?

- Horizontal
- Frontal
- Saggital

6

Which pattern shape describes the border movement of the mandible in a horizontal plane?

Rhomboid

7

What occurs when the mandible has opened a distance of 20-25 mm during a posterior border movement?

A translational opening continues to a distance of 40-60 mm

8

Where does translational movement of the mandible occur?

In the superior cavity of the TMJ between the superior surface of the articular disc and the inferior surface of the mandibular fossa

9

Which theory in the history of development of occlusal concepts states that bilateral and balancing tooth contacts for all lateral and protrusive mandibular movements should exist?

Balance occlusion

10

Which statement(s) apply to the term “centric relation”?

- Useful in achieveing a “reproducible” position when constructing complete dentures
- The articular discs are positioned between the condyles and mandibular fossa
- The condyles are in their most superoanterior position

11

Which statement is true about the directions of force on teeth?

The PDL effectively dissipates vertical forces to the bone

12

Which statement describes the term “mutually-protected” occlusion?

The anterior teeth guide eccentric movements of the mandible and the posterior teeth stop mandibular closure

13

Vertical determinants of occlusal morphology include:

- Plane of occlusion
- Lateral translation
- Condylar guidance

14

T/F... Over-bite refers to the amount of horizontal distance between the incisal edges of opposing MX incisors and MD incisors

False (vertical overlap of MX anterior teeth below edges of the MD anterior teeth)

15

T/F... Rotational mandibular movement refers to the simultaneous movement of an object in the same direction

False (that is translation)

16

T/F... The most superior position of the mandibular condyles from which hinge axis movement can occur is called “centric relation position”

True

17

T/F... Frontal (vertical) plane border movements of the mandible is defined by a rhomboid shaped pattern

False

18

T/F... The absence of a slide from centric relation tooth contact (centric occlusion) to the MI position occurs in only about 10% of the population

True

19

T/F... Saggital plane border movements of the mandible is defined by a “shield-shaped” pattern

False

20

T/F... The lingual morphology of the MX anterior teeth determines part of the characteristics of superior contact border movements of the mandible

True

21

T/F... Occlusal changes should not be part of routine TMD management unless the occlusion is orthopedically unstable

True

22

T/F... It is desirable that only the anterior teeth contact in eccentric movement of the mandible and the posterior teeth disclude

True

23

T/F... The rule of thirds is used to determine the mesiodistal arch discrepancy between the MX and MD teeth

False (buccolingual?)

24

T/F... The non-adjustable articulator is only capable of reproducing one (1) occlusal contact position with no duplication of the patient’s eccentric movements

True

25

T/F... The later condylar guidance (bennet angle) setting on a semi-adjustable articulator duplicates the patients protrusive guidance

False (condylar inclination)

26

T/F... A facebow transfer procedure is a procedure used to properly orient the MX cast on a semi-adjustable articulator

True

27

T/F... A fully adjustable articulator uses “pantographic” recording when the condyles are positioned against the disc and fossa without tooth contact

True

28

T/F... A major goal in the selection of an articulator for restorative dentistry is to avoid excess intraoral grinding and minimize chair time

True

29

Which statement is true concerning the horizontal determinants of occlusal morphology?

Horizontal determinants influence cusp position and ridge/groove direction

30

Horizontal determinants of occlusal morphology include

Rotating condyle distance, Lateral translation, Mid-saggital plane

31

Reversible occlusal therapy includes the following treatment(s):

Occlusal splints

32

Choose the one correct criterion from the following statements that is desirable for musculoskeletal stability prior to occlusal therapy.

Condyles are in the most superoanterior position against the posterior slopes of the articular eminence

33

When the middle 1/3 inner incline of a posterior tooth centric cusp in one arch contacts or aligns with the opposing central fossa which of the following treatment(s) may be indicated?

Selective grinding and Crowns and/or fixed prosthodontics

34

Diagnostic casts mounted in centric relation on the articulator can be helpful in evaluation of the following condition(s):

- “CR” to “MI” slide
- The static and functional relationships of teeth
- The MD movement without the neuromuscular protective mechanisms

35

What is the main advantage of the non-adjustable articulator?

Less time for mounting is required

36

Setting a protrusive condylar inclination on a semi-adjustable articulator allows dentists to create fixed prosthodontic restorations

Cusp height and Fossa depth

37

When providing fixed prosthodontic restorations for a patient with compromised anterior guidance, which type of articulator would be indicated for use?

Fully-adjustable articulator and semi-adjustable articulator

38

When performing Operative Dentistry procedures, a desirable occlusal treatment goal includes:

Carved occlusal restorations in cusp tip to flat surface relationships

39

What is one function of a “Custom anterior guide table”?

To record a desirable anterior guidance from provisional restorations prior to fabricating new anterior restorations

40

The sequence of the delivery of a crown restoration is generally described as:

Adjust proximal contacts, verify marginal fit, and evaluate the occlusion

41

T/F... MD anterior teeth usually contact the MX anterior teeth on the lingual surface 4mm gingival to the incisal edge

True

42

Which statement(s) apply to the term “centric relation”?

- Useful in achieving a “reproducible” position when constructing complete dentures.
- The articular discs are positioned between the condyles and mandibular fossa
- The condyles are in their most superoanterior position

43

Which statement describes the term “mutually protected” occlusion?

The anterior teeth guide eccentric movements of the mandibular and posterior teeth stop mandibular closure

44

Vertical determinants of occlusal morphology include

Plane of occlusion, lateral translation, and condylar guidance

45

Which statement is true concerning the horizontal determinants of occlusal morphology?

Horizontal determinants influence cusp position and ridge/groove direction

46

T/F... The “Dynamic individual occlusion” concept states that occlusion is dependent on an ideal occlusal configuration

False

47

T/F... The medial wall of the mandibular fossa is usually less steep than the wall directly anterior to the condyles

False

48

T/F... More vertical overlap (VO) in anterior guidance will allow for taller cusps

True

49

T/F... The closer a posterior tooth is to the TMJs the more the occlusal morphology will be influenced by the anterior guidance

False (condylar guidance)

50

T/F... Anterior guidance influences the occlusal morphology of posterior teeth, the closer the tooth is to the anterior teeth

True

51

T/F... The temporomandibular ligament assists in limiting the outward lateral movement of the rotating condyle

True

52

Vertical determinants of occlusal morphology include

Plane of occlusion, lateral translation, and condylar guidance

53

Which statement is true concerning the horizontal determinants of occlusal morphology?

Horizontal determinants influence cusp position and ridge/groove direction

54

When the middle 1/3 inner incline of a posterior tooth centric cusp in one arch contacts or aligns with the opposing central fossa, which of the following treatments may be indicated?

Selective grinding and Crowns and/or fixed prosthodontics

55

Reversible occlusal therapy includes the following treatment(s)

Occlusal splints

56

Diagnostic casts mounted in centric relation on the articulator can be helpful in evaluation of the following
condition(s)

- “CR” to “MI” slide
- The static and functional relationships of teeth
- The mandibular movement without neuromuscular protective mechanisms

57

When providing fixed prosthodontic restorations for a patient with compromised anterior guidance, which type of articulator would be indicated for use?

Fully adjustable articulator and Semi-adjustable articulator

58

T/F... The non-adjustable articulator is only capable of reproducing one occlusal contact position with no duplication of the patient’s eccentric movements

True

59

T/F... An “immediate sideshift” of the orbiting condyle in a lateral translation movement dictates that the posterior cusp heights be shorter

True

60

T/F... A facebow transfer procedure is a procedure used to properly orient the maxillary cast on a semi-adjustable
articulator

True