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Flashcards in Midterm 1 Deck (42)
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1
Q

What is a Kennedy Class I?

A

Bilateral edentulous areas located posterior to the remaining natural teeth

2
Q

What is Kennedy Class II?

A

Unilateral edentulous area located posterior to the remaining teeth

3
Q

What is a Kennedy Class III?

A

Unilateral edentulous area with natural teeth remaining anterior and posterior to it

4
Q

What is a Kennedy Class IV?

A

A single gap crossing the midline anterior to the remaining natural teeth

5
Q

T/F: Classification should be made before any planned extractions.

A

False

Have hopeless teeth extracted then give the classification

6
Q

T/F: If a third molar is missing and not to be replaced, it is not considered in the classification.

A

True

7
Q

T/F: If a third molar is present and is to be used as an abutment, it is considered in the classification.

A

True

8
Q

T/F: If a second molar is missing and is not to be replaced, it should still be considered in the classification.

A

False

If a tooth is not to be replaced it is not a part of classification

9
Q

When might you not replace a 2nd molar?

A

No teeth opposing it

10
Q

When there are multiple edentulous areas, which one determines classification?

A

Most posterior edentulous area

11
Q

What is a modification?

A

An edentulous area other than those determining the modification

12
Q

T/F: You can have a class IV arch with additional modifications.

A

False

13
Q

What is the major connector of an RPD?

A

Thicker part of framework connecting parts on either side of arch

14
Q

What are some examples of maxillary major connectors?

A
  1. Ant-post palatal strap
  2. Single palatal strap
  3. Modified full palatal
  4. Complete palatal coverage
  5. U shaped/horseshoe
15
Q

When is a full palatal coverage major connector indicated in the maxilla?

A
  1. When the patient has 6 teeth or less

2. Very small mouth, flat or flabby ridges

16
Q

What is the advantage of a modified full palatal coverage major connector?

A

Similar support to full coverage but does not cover rugae area behind incisors

17
Q

When would a u-shaped/horseshoe major connector be indicated?

A

Patient has a large torus palitinus

Does not offer as much support as full or modified palatal

18
Q

What are the three types of mandibular major connectors?

A
  1. Lingual bar
  2. Lingual plate
  3. Labial bar (swing lock)
19
Q

T/F: Lingual bars have the highest patient acceptance of all mandibular major connectors.

A

True

20
Q

What are the needed dimensions for a lingual bar?

A

Bar is 4 mm in height and top of the bar is 3-4 mm from FGM

21
Q

When is a lingual plate indicated?

A

Lingual vestibule is < 7mm

22
Q

T/F: Lingual plate is good to use when there is an anticipated loss of teeth.

A

True

23
Q

T/F: Lingual plates can be used in the presence of lingual tori.

A

True

24
Q

When is a swing lock major connector indicated?

A
  1. Missing key abutments
  2. Unfavorable contours
  3. Labial inclination of teeth
25
Q

What is the main advantage of an intracoronal retainer?

A

Esthetics

26
Q

What are the disadvantages of intracoronal retainers?

A
  1. Requires castings
  2. Complicated
  3. Difficult to repair
  4. Expensive
  5. May require splinting
27
Q

What are the 4 parts to a basic clasp assembly?

A
  1. Rest
  2. Retentive arm
  3. Reciprocating arm
  4. Guiding plate
28
Q

How much undercut is needed for the CC clasp retentive arm?

A

.01 inches

29
Q

What is the purpose of the reciprocal arm?

A

Counteract retentive force of the clasp

30
Q

What is the purpose of the rest?

A

Resistance to the RPD pushing too hard on the tissue

31
Q

What types of rests are used on anterior teeth?

A

Cingulum rest (canines) or incisal rest

32
Q

T/F: The guide plate is always next to the edentulous area.

A

True

33
Q

T/F: CC clasps are highly indicated for Kennedy Class III arches.

A

True

34
Q

When is it best to use an embrasure clasp?

A

Kennedy II or III with no mods or Kennedy IV

Need double rests

35
Q

What are the six requirements for every direct retainer or clasp assembly?

A
  1. Support
  2. Stabilization
  3. Retention
  4. Adequate encirclement
  5. Reciprocity
  6. Passivity
36
Q

Support is provided by the _____.

A

Rests

37
Q

The minor connectors and guide plates provide the RPD with ________.

A

Stabilization

38
Q

What is considered adequate encirclement?

A

Greater than 180 degrees

39
Q

_________ means there is no active force on the tooth when the clasp is in place.

A

Passivity

40
Q

What would be an application of the thinner mesh denture base?

A

When there is not much interocclusal space for a new tooth

41
Q

T/F: Butt acrylic teeth are not indicated for Kennedy I or II arches.

A

True

42
Q

T/F: The angle of the finish line with the major connector should be less than 90 degrees.

A

True