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D2 Fall - RPD > 8/28: Rest & Rest Seats > Flashcards

8/28: Rest & Rest Seats Flashcards

1
Q
  1. This is a rigid extension of a fixed or RPD that transmits functional forces to the teeth
A

Rest

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2
Q
  1. What are the functions of rests?
A

a. Direct forces down the long axis
b. Prevent cervical movement
c. Limit lateral movement
d. Maintain retentive arm in proper vertical position
e. Improve occlusal plane

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3
Q
  1. What are the types of rests?
A

a. Occlusal
b. Embrasure
c. Cingulum
d. Hooded
e. Incisal

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4
Q
  1. Where is the location of occlusal rests?
A

a. mesial/distal pits
b. Over marginal ridge

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5
Q
  1. What is the depth of the occlusal rest seat?
A

a. 1-1.5mm reduction over marginal ridge
b. 1.5-2mm at deepest

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6
Q
  1. The floor of the rest seat and axial centers angle should be
A

a. Less than 90

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7
Q
  1. Where is the location of the embrasure rest seats?
A

a. 2 adjacent posterior teeth

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8
Q
  1. When are embrasure rests used?
A

a. No posterior modification space is available

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9
Q
  1. In embrasure rests, should you maintain tooth contact?
A

Yes

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10
Q
  1. How much space in embrasure rest seat?
A

2mm

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11
Q
  1. What shape should the marginal ridge be for the embrasure rest? dimensions?
A

a. U shape
b. 1mm depth, 2mm wide

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12
Q
  1. How is occlusal clearance evaluated for the embrasure rest?
A

a. 18-gauge wire

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13
Q
  1. When would you use a lingual rest seat?
A

a. Canines with gradual lingual slope
b. Any anterior tooth

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14
Q
  1. Can you prep a mandibular canine for a lingual rest? How?
A

a. Yes, with composite

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15
Q
  1. How do you prep a cingulum rest seat for the max canine?
A

Cut into tooth

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16
Q
  1. How do you prep a cingulum rest seat for the mandible canine?
A

a. Composite restoration

17
Q
  1. How wide is the cingulum rest from the proximal view?
A

1mm

18
Q
  1. The lingual cingulum rest uses primarily what teeth?
A

Max canines

19
Q
  1. What shape is the lingual cingulum rest seat?
A

a. Chevron ā€œVā€

20
Q
  1. What are the dimensions of the lingual cingulum rest seat?
A

a. Width = 0.75-2mm
b. Depth = 1-1.5mm

21
Q
  1. When would you do a hooded rest seat?
A

a. Mandibular 1st premolars only

22
Q
  1. What reduction is needed for a hooded rest seat?
A

a. 1-1.5mm

23
Q
  1. This is the least desirable of all rests
A

a. Incisal rest

24
Q
  1. Incisal rests are primarily used on which tooth?
A

a. Mandibular canine

25
Q
  1. Incisal rests are primarily used as an
A

a. Indirect retainer or auxiliary rest

26
Q
  1. What is the minimal rest seat reduction needed?
A

1mm

D2 Fall - RPD (10 decks)

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