Midterm 2020

Question 1

1. Occlusal clearance for posterior ceramic crown of 1 is enough?

Answer 1

a. False

Question 2

2. Picture of tipping tooth with short walls is about

Answer 2

a. Resistance
b. Improve by- grooves/ boxes

Question 3

3. Picture of anterior prep where facial reduction was < 1mm and asked what is
   wrong with the preparation.

Question 4

4. Picture of knife edge margin

Question 5

5. Why use chamfer for all metal?

Answer 5

a. all of the above: acute angle with metal, ease of ability etc).

Question 6

6. most teeth just have to be 2mm tall. Need to be 0.4 or higher

Answer 6

a. first is false, second is true

Question 7

7. picture of prep asked what is wrong with buccal and lingual walls

Answer 7

a. over-converged

Question 8

8. what type of finish line for porcelain?

Answer 8

a. Modified shoulder or heavy chamfer

Question 9

9. What is the measurement of a chamfer line?

Answer 9

a. 0.3-0.5mm

Question 10

10.What finishing bur not for acrylic?

Answer 10

diamond point on highspeed

Question 11

11.w/o proximal contact in provisional: what happens:

Answer 11

food impaction/
perioinflamm and mesial drift leading to more final adjustments or remake
needed

Question 12

12.reason for indirect provisional:

Answer 12

protection of pulp from exothermic heat

Question 13

13.why you want monomer fully reacted:

Answer 13

toxic (biologically harmful), stronger
physical properties

Question 14

14.which is best for direct?

Answer 14

a. Bis-acryl resin

Question 15

15.what to do to evaluate occlusion:

Answer 15

intraoral exam, diagnostic casts

Question 16

16.how NOT to view undercuts:

Answer 16

a. binocular vision

Question 17

17.groove helps with

Answer 17

a. path of insertion, proper seating, resistance to rotation

Question 18

18.ant ceramic-unfavorable with

Answer 18

a. occlusal contact in cervical 1/5

Question 19

19.something about getting right axial reduction

Answer 19

a. 2-plane

Question 20

20.You preserve facioproximal and linguiproximal angles

Answer 20

a. True

Question 21

21.Short walls will ______ resistance and this is important for ______ teeth

Answer 21

a. Decrease resistance, wider teeth

Question 22

22.Rampant caries –

Answer 22

motivate pt to have good oral hygiene and control ds, no
fixed tx until under under control, amalgam with pin

Question 23

23.Rationale for facebow with semi adjustablea.

Answer 23

close approx. of post determinants

Question 24

24.“Standard not Met” with occlusion

Answer 24

a. Shim stock holds in crown but not in adjacent teeth
b. Red marks from eccentric movement showed in same place as MIP

Question 25

25.Evaluation shows TMJ is off….

Answer 25

a. Further evaluate

Question 26

26.Use full depth of bur to make chamfer line

Answer 26

a. False

Question 27

27.Where gold cast crown is contraindicated

Answer 27

a. Only moderate carious lesions

Question 28

28.Most shrinkage

Answer 28

a. PMMA

Question 29

29.Lead to fracture

Answer 29

a. Sharp line angles

Question 30

30.Articulator and face bow

Answer 30

a. Closely approximate position of posterior teeth

Question 31

31.Groove needs to be

Answer 31

a. 90 degrees to axial wall

Question 32

32.Tooth preparations require all of the following except

Answer 32

a. OC:FL ratio of 0.25

Question 33

33.Incisal reduction of metal ceramic?

Answer 33

a. 2-2.5 mm

Question 34

34.Occlusal clearance of complete metal crown?

Answer 34

a. 1-1.5 mm

Question 35

35.Collarless metal ceramic (Porcelain labial margin)

Answer 35

a. Shoulder