Practice Test Flashcards by Grant Teichmeier

If a patient has one side of their arch supported by the residual ridge and the other supported by natural dentition, what classification are they?

Unilateral tooth-tissue supported RPD

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If a patient is missing her 4 maxillary incisors and has a severely resorbed edentulous ridge, what would you recommend for a treatment plan?

Removable Partial Denture

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The reciprocating arm of a supra-bulge clasp is located

In the middle 1/3

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When surveying a cast, the maximum tilt that is acceptable is

10 degrees

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A component of a RPD that serves to transfer forces occurring against the prosthesis down the long axis of the abutment tooth and prevent tissue-ward movement of the RPD is

Rest

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Which of the following is false concerning Indirect Retainers

Most commonly in the form of a MO rest on a 1st molar

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The purpose of tripoding the cast is to

Record the cast position to the surveyor

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Path of insertion is determined by all of the following EXCEPT::

Guiding planes
Retentive Undercuts
Occlusion
Interferences
Esthetics

Occlusion

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A surveyed crown are indicated when

The survey line is in the gingival 1/3
No undercuts exists on abutment teeth
With the help of enameloplasty, one cannot have the changes necessary for the abutment teeth without cutting into dentin
All of the above are true

-All of the above are true

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The amount of undercut varies depending on the clasp type. How many inches of undercut is used for a Cr-Co or Ni-Cr cast clasp is

0.01 “

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The order of performing tooth modifications within the mouth are

Guide planes, Survey line reposition, Rest

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You should decide what type of clasp to use after

Surveying the cast

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Vertically parallel surfaces of abutment teeth oriented to contribute to the direction of the path of insertion and dislodgment of a RPD during insertion and removal is called

Guiding planes

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The terminal 1/3 of a retentive clasp arm in a tooth-tissue borne RPD should be located

Gingival 1/3

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Picture of a maxillary arch: The patient is missing tooth #12, 13, 14, 15 but has retained tooth #16. What is the classification?

Class 3

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Which of the following is true concerning Kennedy’s classification?

Edentulous areas other than those that determine the classification are referred to as modifications and are designated by their number

The extent of the modification is not considered, only the number of additional edentulous areas is considered

Both of the above are true

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Which Kennedy’s classification is it not possible to have modification areas?

class 4

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Which of the following is true concerning guiding planes

As wide as the widest portion of the occlusal rest
1/3 the bucco-lingual width of the tooth
1/2 the distance between the cusp tips
All of the following are true

All of the above

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The length of guiding planes in a tooth-tissue supported abutments should be

1.5-2.0 mm

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The length of guiding planes in a tooth supported abutments should be

3-4 mm

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Borders for a maxillary major connectors should be placed ________ mm from the gingival margin

6 mm

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The primary purpose of a posterior palatal seal for the maxillary major connectors is to

Prevent the ingress of air and food underneath the denture

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Which of the components of a RPD are not rigid

(A AND B ARE RIGHT)
Approaching arm of I-bar

Terminal 1/3 of the retentive arm

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A facebow transfer of a diagnostic cast for planning an RPD helps with:
`

(A AND B ARE RIGHT)

More accurate arc of closure
More accurate occlusion

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Which clasp is indicated when the patient is concerned about esthetics?

I-Bar

Why choose cingulum rest over incisal edge

Less leverage on the tooth

The amount of space needed from the floor of the mouth to the free gingival margin for a lingual bar is

7-9 mm

A lingual plate is indicated for all of the following EXCEPT?

Severely anterior crowding | `

The ____________ component of an RPD joins the major connector to the clasp assembly and indirect retainers

Minor Connector

In a suprabulge clasp type, the retentive arm approaches the undercut from

Above the survey line

The first choice of clasp for a distal-extension RPD is

RPI

Examples of Tooth-tissue supported RPDs are

(A AND B ARE RIGHT) Class 1 Class 2

The most common cause of rest fracture is due to

Inadequate rest seat reduction

The primary function of an occlusal rest is to

Direct forces down the long axis of the tooth

The primary-design quality of the occlusal rest would categorize it as a + rest seat is

Forms an acute angle with the minor connectors that connect them to the major connectors

Which teeth can be prepared with a lingual rest seat (does not require the addition of composite)?

Maxillary canine

The altered cast procedure is used to

Ensure support for the RPD

The altered cast procedures requires all of the following EXCEPT

Placement of pressure on the distal extension

If a patient has numerous teeth with harmonious occlusion, casts can be mounted

In MIP

All of the following are the disadvantages of the bar (infra-bulge) clasp EXCEPT one. Which is the exception?

Less Flexible

The only major connector that should not be used in the maxillary arch is

Lingual bar

The major connector most commonly used for class III RPDs

Palatal strap

The width of the straps used in A-P

6-8 mm

Depth of marginal ridge in rest seat

1- 1.5 mm

Proximal plate needs to be adjusted before rest seat. You want the S curved survey line in the retentive arm, not the reciprocal arm

both true

Fabrication of RPD framework

Master cast

Lateral forces are what function

Cross arch stabilization

t/f: Rests transfer forces down long axis

true

Order of reduction

Guide planes, survey line adjustment, rest seats

You want guide planes to wrap around to lingual in RPI. There should be sluiceway through the facial in RPI on the mesial rest

true then false

Cast circumferential undercut

0.01 "

Co-Cr is used in UMKC clinic. Co-Cr used more than Ni-Cr because of nickel allergy

true

t/f: Reciprocal clasp is rigid and above the survey line

true

The proximal 2/3 of reciprocal is in the ___ and the terminal 1/3 of the reciprocal is in the ___

middle | middle

Don’t want excessive tilt to the cast –why

You want the cast to be perpendicular to the occlusal plane

Kennedy classification with no mods

Class IV

Terminal 1/3 of retentive clasp is in the

Gingival 1/3

Which one does not apply to guiding planes

NEVER use mesially tilted mandibular molars for rest seat

Alternative cast method you remove

The distal extensions

Which of the following is drawn in red

undercut

For an I bar, you cannot use which of the following in a distal extension case

Width of guiding plane in tooth-tissue

1.5-2 mm

Width of guiding plane in tooth-tooth

3-4 mm

The pod of the I bar in a 0.01” undercut

The 2mm area that touches the undercut

As length of the guiding plane is increased, frictional retention increases. As the length increases, resistance retention increases

true | true

You have 19, 22, 23, 24, 25 missing – what is kennedy classification

Class III mod 1

Bilateral distal extension is what classification

Class I

Borders for lingual plate should be 3-4 from the gingival margin. Depth of floor of mouth is best determined by the cast

true then false

When do we not use the lingual plate

Severe anterior crowding

Which of the following are required for clasp assembly

Support, resistance, retention

Which major connector is the least rigid

Horseshoe

Which tooth is the composite cingulum rest seat placed on

Mandibular canine due to thinner enamel

What is the most common stress relief in distal extension cases

RPI

Pt with all maxillary teeth, which will not contribute to Kennedy classification

tori

Which of the following isn’t true about the principle of encirclement

The RPI doesn’t satisfy it

In CR, the condyle contacts the thinner, ___ part of the disc and is in the most ____ position

Avascular, anterior superior

The retentive arm is on the buccal of the maxillary teeth. This is due to the curve of spee

true, false

When viewed from the facial, when pt bites down on the distal extension area, what direction does the RPI move

Downward and mesially

What is not dental terminology

flipper

In Applegate’s rules, the most __ edentulous area ___ determines classification

posterior always

t/f: It is more desirable to keep the rounded contour from the occlusal

true

Tilting the cast changes the HOC. You use the tip of the carbon marker to mark the survey line

true, false

RPI clasp is what type of lever

class II

1. External finish line?

a. Framework to denture base

2. When biting down I bar moves (mesial, down, up)

a. Mesial and down

tissue undercut can prevent selection of (supra, infra, minor connector)

a. Infra bulge

4. Only major connector not used in maxillary arch

a. Lingual bar

5. Most commonly used for class 3 RPD

a. Palatal strap

6. Width of straps used in AP

a. 6-8 mm

7. Depth of marginal ridge in rest seat

a. 1-1.5

8. Undercut for a chromium thing

a. 0.01 inches

9. Proximal plate adjusted before rest seat. S curved survey line for retentive not reciprocal

a. True, true

10. Fabrication of RPD framework

a. Master cast

11. Lateral forces

a. Cross arch stabilization

12. Transfer forces down long axis

a. Rest

13. Order of reduction

a. Guide planes, survey line adjustment, rest seat

14. Co-Cr used at UMKC. Co-Cr used more than Ni because of allergies

a. True, true

15. Proximal 2/3 of reciprocal in ______, terminal 1/3 of reciprocal in ______

a. Middle, middle

16. Don’t want excessive tilt to the cast

a. Want cast to be perpendicular to occlusal plane

17. Kennedy classification with no modifications

a. 4

18. Terminal 1/3 of retentive clasps

a. Gingival 1/3

19. Does NOT apply to guiding planes

a. Never use mesially tilted mandibular molars for rest seats

21. Alternative cast what do you remove

a. Distal extensions

22. What do you use for alternative cast method

a. 1 and 2

23. What’s in red

a. Undercut

24. Where can you not put I bar

a. DF

25. As length of guiding plane increases ________

frictional retention and resistance increases

26. You have 19,22,23,24,25 missing. What classification is it?

a. Kennedy class 3 mod 1

27. Bilateral distal extension

a. Class 1

28. Borders for lingual bar 3-4 from GM. Distance best measured on cast

a. True, false

29. Axis of rotations measured from

a. Rest

30. Kennedy class 2 there is no axis of rotation something about median suture in max

a. False

31. Tooth that supports prosthesis

a. Abutment

32. Least rigid connector

a. Horseshoe

33. Isn’t true about principle of encirclement

a. RPI doesn’t satisfy it

34. “long” guiding planes

a. 3-4 mm

35. “short” guiding planes`

a. 1.5 mm

36. Required for clasp assembly

a. Stability, reciprocation, retention

37. Best clasp choice for stress relief

a. RPI

38. Composite cingulum

a. Mandibular canine due to thinner enamel

39. Pt with all maxillary teeth, not contribute to kennedy

a. Torus

40. Not dental terminology

a. Flipper

41. In applegate, most _____ edentulous area ______ determines classification

a. Posterior, always

42. Tilting the cast changes the HOC. You use the tip of carbon marker

a. True, false

43. RPI clasp is what type of lever

a. Class 2

44. The order of performing tooth modification within the mouth are

a. Guide planes, survey line reposition, rest

45. When is lingual plate NOT indicated?

a. Anterior crowding

46. Connects major connector to other pieces

a. Minor connector

47. You want to keep occlusal contour original rounded. Rest should be ½ distance between cusp tips

true true

You use altered cast technique on class I and III

• FALSE

Practice Test Flashcards

(130 cards)