Lecture 6

Question 1

When do pit and fissure carried pass through the enamel?

Answer 1

they don’t (they are base to base)

Question 2

How do caries spread at the DEJ?

Answer 2

laterally

Question 3

T or F? S. surface carries penetrates the full thickness of the enamel.

Answer 3

T (2 pyramids, apex to base)

Question 4

What will caries in developmental defects look like?

Answer 4

pyramids base to base (just like pit and fissure)

Question 5

T or F? Both smooth surface carries and pit and fissure caries spread laterally along thee DEJ.

Answer 5

T

Question 6

What class are pit and fissure caries?

Answer 6

Class I

Question 7

T or F? All Classes of caries besides Class I can be categorized as smooth surface caries

Answer 7

F. Class VI was not on list

Question 8

Who coined the phrase, “extension for prevention.”

Answer 8

G.V.Black

Question 9

Explain what “extension for prevention” means.

Answer 9

pits and grooves should be included in the outline form to prevent them from becoming carious (not still done, we are more conservative now)

Question 10

How would you classify a carious lesion on the mesial surface of tooth 30 on a developmental defect?

Answer 10

Class I because it is caries of a developmental defect

Question 11

What class would be a lesion on the lingual surface of the Maxillary Lateral Incisor be?

Answer 11

Class I

Question 12

How would you classify a lesion in the buccal pit of the first mandibular molar?

Answer 12

Class I

Question 13

What types of teeth can be involved in Class II lesions?

Answer 13

premolars and molars

Question 14

How would you classify a carious lesion that is on the proximal surfaces bw the canine and the 1st premolar?

Answer 14

Class II or Class III?

Question 15

This caries class invovles the incisal edge corner:

Answer 15

Class IV

Question 16

These are smooth surface caries originating in the gingival 1/3 of the facial or lingual surfaces of anterior and posterior teeth:

Answer 16

Class V

Question 17

Incisal or occlusal wear can lead to the exposure of the dentin leading to the formation of caries, what class?

Answer 17

Class VI

Question 18

Which class was not part of the original classification system of G.V.Black but was added later?

Answer 18

Class VI

Question 19

Blacks steps in cavity preps:

Answer 19

Outline form, resistance form, retention form, convenience, form, remove remaining carious dentin, finish enamel walls and margins, cleanse cavity preparation

Question 20

What is the final form of the cavity prep determined by?

Answer 20

extent of lesion, proximity to pis and grooves, approximating and opposing teeth, soft tissue, esthetics, restorative material

Question 21

What is resistance form?

Answer 21

the shape and placement of the cavity walls that best enable both the restoration and the tooth to withstand occlusal forces WITHOUT fracture

Question 22

What is retention form?

Answer 22

the shape or form given to the cavity prep that best allows the restoration to resist displacement through TIPPING or LIFTING forces

Question 23

What is convenience form?

Answer 23

the shape or form of the cavity that allows adequate observation, accessibility and ease of operation in preparing and restoring the cavity.

Question 24

When would addition carious dentin need to be removed after obtaining the convenience form?

Answer 24

if it were medium or large in size

Question 25

How do you finish the enamel walls and margins?

Answer 25

unsupported enamel rods are removed, to make the lbest marginal seal bw the restorative and tooth structure, provide maximal strength of both enamel and restorative material at the margin

Question 26

Step in cleansing the cavity prep:

Answer 26

remove all chips and debris & final inspection

Question 27

For our Class I Resin Prep, how wide should the distal and marginal ridges be?

Answer 27

1-1.5mm wide

Question 28

For our Class I Resin Prep, how wide should the bucco-lingual isthmus be?

Answer 28

1-1.25

Question 29

What is the term for the width of the prep in the buccal-lingual direction?

Answer 29

bucco-lingual isthmus

Question 30

For our Class I Resin Prep, the pull wall minimal depth is:

Answer 30

1.5mm at the central pit

Question 31

For our Class I Resin Prep, the pull wall maximum depth at the triangular ridges is:

Answer 31

2mm

Question 32

Term for the junction of the cavity prep and the tooth surface;

Answer 32

cavosurface margin

Question 33

Term for open margins, marginal deficiencies:

Answer 33

sub-margination

Question 34

Term for marginal excess:

Answer 34

flash

Question 35

If the cuspal plain of your prep is concave, this means it it (over/under) contoured:

Answer 35

under

Question 36

T or F? The final product should always have proper MIP occlusion.

Answer 36

F. Centric occlusion

Question 37

For our Class I Resin Prep, the ideal external outline form is:

Answer 37

1.25mm B-L width, 1-1.5mm marginal ridge width

Question 38

2 types of fissures:

Answer 38

I and V type

Question 39

Tx for pt with deep pits and fissure w no caries:

Answer 39

sealants and reevaluation

Question 40

Tx for pt w minimal isolated carious pits and fissures

Answer 40

PRR

Question 41

Tx for pt w carious lesions throughout pits and fissure system:

Answer 41

composite resin/ amalgam

Question 42

The only time you would prepare a traditional class I prep for carious lesion in pit and fissure system:

Answer 42

carious lesions throughout pits and fissure system

Question 43

What is the most critical aspect to caries prevention with sealants?

Answer 43

Retention

Question 44

3 goals in the placement of sealants:

Answer 44

repair, conserve, prevent