Dental Caries and Classification

Question 1

a multifacorial infectious disease that attacks teeth by certain bacteria if the conditions are permissible causing destruction(demineralization/dissolution) of the tooth

Answer 1

dental caries

Question 2

very tiny caries not pass DEJ

Answer 2

incipient (reversible)

Question 3

caries passes DEJ, just into dentin

Answer 3

small

Question 4

caries gone 1/2 through dentin

Answer 4

moderate

Question 5

caries lesion very close to pulp

Answer 5

extensive

Question 6

which caries classifications do we prep and restore

Answer 6

small, moderate, extensive (cavitated)

Question 7

on the occlusal surfaces of posterior teeth, buccal and lingual surfaces of molars, lingual surfaces of maxillary anterior teeth

Answer 7

pit and fissure caries

Question 8

caries on the surfaces that are pit and fissure free (mesial and distal)

Answer 8

smooth surface caries

Question 9

more in elderly, follows an advanced gingival recession

Answer 9

root surface caries

Question 10

rate classification active; __-rapidly invading, softer lesions, multiple teeth

examples; nursing bottle, radiation, meth mouth

Answer 10

rampant(acute)

Question 11

rate classification active; __-slow, long standing, dark in color and so there is a good chance of remineralization in early stages (reverse the demineralization process)

Answer 11

chronic

Question 12

not showing any further progression, smooth and polished like surface

Answer 12

arrested caries

Question 13

leaking margin, caries under a preexisting faulty restoration

Answer 13

recurrent/secondary caries

Question 14

who came up with the classification of caries (class 1, class II, etc.)

Answer 14

GV black

Question 15

pits and fissures of occusal surfaces of premolars and molars, buccal or lingual pits/fissures of the molars, lingual pit near the cingulum of the maxillary incisors

Answer 15

class 1

Question 16

involving the proximal surfaces (mesial/distal) of premolars and molars (posterior teeth only)

Answer 16

classII

Question 17

proximal (mesial/distal) surfaces of incisors and canines (anterior teeth)

Answer 17

class III

Question 18

proximal surfaces of incisors and canines, but also will involve the incisal edge

Answer 18

class IV (4)

Question 19

gingival third (the area near the gingiva) of the facial or lingual surfaces of any tooth

Answer 19

class V(5)

Question 20

involve the incisal edges of anterior teeth and the cusp tips of posterior teeth, (rare)

Answer 20

class VI(6)

Question 21

according to GV Black, the location of the lesion dictated the design of the

Answer 21

cavity preparation

*a class I lesion corresponds to a class I cavity prep and so on

Question 22

1. ) removal of dental caries
2. )removal of weak tooth structure to provide well supported sound hard tissue
3. )pulp protection (if healthy pulp, protect it)

Answer 22

fundamental concepts for all tooth preps

Question 23

a mechanical alteration of a diseased or a defective part of the tooth to receive a restoration material to ultimately restore healthy state of the tooth, longevity and patient comfort

Answer 23

cavity prep

Question 24

healthy state is reestablishing

Answer 24

tooth is not diseased anymore

normal function and form

esthetically pleasing where indicated(anterior zone of the oral cavity)

Question 25

junction of two surfaces

Answer 25

line angle

Question 26

junction of 3 surfaces

Answer 26

point angle

Question 27

extend to the outer tooth surface

Answer 27

external wall

Question 28

do not extend to the outer tooth surface

Answer 28

internal wall

Question 29

__ are parallel to the long axis

Answer 29

axial wall

Question 30

right angle to long axis

Answer 30

perpendicular walls

Question 31

touching uncut tooth structure

Answer 31

gingival wall

Question 32

not touching uncut tooth structure

Answer 32

axial and pulpal wall

Question 33

narrowest portion of a cavity prep (betweeen 2 triangular ridges)

Answer 33

isthmus

Question 34

a portion of the cavity connecting an occlusal portion and a proximal portion together

Answer 34

class II

Question 35

__ design includes each marginal fossa and the developmental grooves around the marginal pits

Answer 35

dovetail

Question 36

junction between the external walls of the cavity prep and the uncut tooth surface

Answer 36

cavosurface margin

Question 37

``` outline form resistance form retention form convenience form finishing debridement ```

Answer 37

basic 6 principles of cavity preps

Question 38

+conservation of tooth structure +location and the extent of the carious lesion +position of pit and fissure dictate the outline

Answer 38

factors governing outline form

Question 39

two outline form approaches; __1__; extensive tooth preparation, unnecessary loss of healthy tooth structure _2_; preservation of the remaining tooth structure, minimal extension of the outline form

Answer 39

1= extension for prevention 2=conservative approach

Question 40

who to do with caries lesions on same tooth that are separated with less and more than 0.5mm of enamel

Answer 40

less than 0.5 make 1 prep greater than 0.5mm save as much and make 2 preps

Question 41

design features of cavity prep to avoid fracture of tooth structure, allowing the remaining tooth structure and the restoration to withstand forces that are principally directed towards the long axis of the tooth

Answer 41

resistance form

Question 42

1. removal of the undermined enamel 2. flat pulpal fllor and cavity wall angulation 3. cavity prep depth 4. well defined rounded internal line angles 5. type of restorative material

Answer 42

primary resistance

Question 43

resistance form __; cavosurface margin should not terminate on unsupported or undermined enamel to prevent fracture

Answer 43

removal of undermined surface enamel

Question 44

resistance form ___;cup shapred cavity, rotation of the restoration results in a wedging effect on the supporting dentin bridge +box shaped: pulpal floor perpendicular to the long axis of the tooth

Answer 44

flat pulpal floor

Question 45

resistance form __, adequate depth to provide enough thickness of amalgam to prevent its fracture under load

Answer 45

cavity prep depth

Question 46

minimal amalgam thickness to withstand forces

Answer 46

1.5mm

Question 47

resistance form __, placing line angles to delineate the walls

Answer 47

well defined rounded internal line and point angles

Question 48

__ line angles are not recommended in any restoration because they act as stress concentration areas

Answer 48

sharp

Question 49

cavosurface margin has to establish a __butt-joint margin amalgam margin

Answer 49

90 degrees

Question 50

__has a low edge strength

Answer 50

amalgam

Question 51

design features of the cavity prep that prevent __of the restoration by lifting or tipping forces

Answer 51

dislodgement

Question 52

amalgam does not bond to tooth structure thus increasing the __ of the walls that contacts the amalgam will increase friction

Answer 52

surface area

Question 53

making opposing walls __or__toward the occlusal

Answer 53

parallel or slightly converging

Question 54

sufficient access to the cavity, to facilitate visibility and instrumentation of the cavity prep and the insertion of the restorative material

Answer 54

convenience form

Question 55

__ is important for complete removal of decay

Answer 55

visibility

Question 56

__ the cavorsurface margin (enamel margin) to prevent jagged or rough outline, to achieve the best marginal seal

Answer 56

finish

Question 57

this is the final step before cavity prerp receives the restoration, rinsing the cavity with air/water syringe and high suction evacuation, to removal smear layer and free cavity from moisture (blood and saliva)

Answer 57

debridment