Cavity Design: Principles and Class V

Question 1

What is Black’s classification of caries?

Answer 1

Question 2

Classify this type of caries:

Answer 2

Class I

Question 3

Classify this type of caries:

Answer 3

Class I

Question 4

Classify this type of caries:

Answer 4

Class I

Question 5

Classify this type of caries:

Answer 5

Class II

Question 6

Classify this type of caries:

Answer 6

Class II

Question 7

Classify this type of caries:

Answer 7

Class III

Question 8

Classify this type of caries:

Answer 8

Class IV

Question 9

Classify this type of caries:

Answer 9

Class I and VI

Question 10

Classify this type of caries:

Answer 10

class V

Question 11

What’s the difference between Primary vs. Secondary caries?

Answer 11

Question 12

Terms to describe size of a filling:

Answer 12

Question 13

What wall surfaces on a tooth is considered when we do fillings?

Answer 13

Question 14

What angles on a tooth is considered when we do fillings?

Answer 14

Question 15

What type of angle + margin is used as reference when doing fillings

Answer 15

Question 16

List the principles of tooth preparation we need to consider when doing fillings:

Answer 16

Question 17

List the 9 steps of tooth preparation :

Answer 17

Question 18

In general what is the correct alignment of rotary instruments when we are dealing with caries on the

a) occlusal/proximal surfaces
b)facial/ oral surfaces

Answer 18

Question 19

Define the principle of Resistance form:

Answer 19

prevention of fracture of restoration or tooth structure under occlusal forces.

Factors affecting resistance form:
* depth of the cavity
* thickness of remaining cavity walls
* internal angles
* pulpal wall (floor)
* cavosurface angle

Question 20

Define the principle of Retention form + give 2 types ‘locks’ that we can place on a filling to ensure it doesn’t fall out.

Answer 20

Question 21

Define the principle of Convenience

Answer 21

Question 22

Define the principle of Caries removal

Answer 22

Question 23

Define the principle of External wall finishing

Answer 23

Question 24

Define the principle of Cavity debridement

Answer 24

Question 25

What surface does a class V filling involve and what filling material can we use to restore it?

Answer 25

Surface of Class V decay: gingival 1/3 of buccal/lingual surface on any teeth

Filling material we can use: Glass Ionomer Cement (GIC) or Composite Resin (CR)

Question 26

Objectives of tooth preparation of class V decay:

Answer 26

Question 27

The difference when preparing a filling using GIC (glass Ionomer cement) vs CR (composite resin):

Answer 27

After drilling out all of carious part of teeth (dimensions in picture), we can fill it with GIC.

If using CR instead then we need to do an extra step