Midterm

Question 1

Cingulum rest size

Answer 1

Mesiodistal: 2.5-3mm
Labiolingual: 2mm
Incisoapical 1.5mm

Question 2

Incisal rest size

Answer 2

2. 5mm wide

1. 5mm deep

Question 3

Class III uses this design

Answer 3

Circumferential

Question 4

Class I and II uses this design

Answer 4

RPI

RPA

Question 5

Wrought vs combination

Answer 5

Wrought has mesial rest, combo has distal rest

Question 6

When is embrasure clasp used

Answer 6

II or III on side with no missing teeth

Question 7

Ring clasp use

Answer 7

when undercut is on mesial buccal or mesial lingual of mandibular molars

Question 8

Considerations controlling path of insertion

Answer 8

Tooth structure to be removed
Location of undercuts
Absence of tissue undercuts
Patient ability to place along path of insertion

Question 9

Size of guide planes

Answer 9

1/3 buccal lingual width

2-3mm from marginal ridge to certical

Question 10

First class lever example

Answer 10

see saw

crowbar

Question 11

Second class lever example

Answer 11

Wheel barrow

Question 12

RPI

Answer 12

Mesial rest
Distal proximal plate
I bar

Question 13

Contraindication of I bar

Answer 13

Bony undercut or high frenum attachment

Question 14

Which arm stay below survey line?

Answer 14

RPA

Question 15

Which ones have .02 undercut

Answer 15

Combo clasp

RPW

Question 16

Ibar must be __mm apical to FGM

Answer 16

3mm

Question 17

Wrought is made of

Answer 17

18 guage

Question 18

Bur used for rests

Answer 18

8 then 6

Question 19

Steps of tooth prep (6)

Answer 19

Establish occlusal plane
Recontour posterior proximal
Recontour anterior proximal
Recontour facial and lingual
Rest preps
Smooth and polish

Question 20

Palatal strap
AP
Full palatal

Answer 20

Class III
Class I II IV
6 or fewer teeth

Question 21

6 steps to direct retainer

Answer 21

Support
Stabilization
Retention
Encirclement 
Reciprocity
Passivity