Quiz 2 Exam 1-Review of class 1s

Question 1

Preserve what on mandibular molars

Answer 1

Marginal Ridge

Question 2

Include all central developmental groove, but extend __________ up the ______

Answer 2

1/3-1/2 up the buccal

Question 3

Include which triangular fossas in mandibular molar class 1 prep

Answer 3

M and D Triangular Fossas

Question 4

Extend ____ way up the M-B and M-L cusps

Answer 4

1/4

Question 5

For maxillary molar Class 1, include which pits?

Answer 5

M, central, distal pit

Question 6

Appearance of Max Molars Class 1

Answer 6

Modified butterfly

Question 7

Preserve what in class 1 on max molars

Answer 7

M marginal ridge

Question 8

How to preserve oblique ridge on max molar class 1 prep

Answer 8

extend only 1/4 its height

Question 9

Include all of what groove on max molar class 1 prep, but just 1/3-1/2 of the ______ developmental groove

Answer 9

buccal

Question 10

Mesial Triangular fossa included in Max molar class 1?

Answer 10

Yes

Question 11

Extend ___ way up M-B and M-L cusps on a max molar class 1 prep-and consider the D pit

Answer 11

1/4 the way all of them (D-B and D-L too

Question 12

Resistance form includes (4)

Answer 12

90 degree cavosurface margin

Cusps and ridges preserved by limiting extensions to 1/4 their heights

Flat pulpal floor that is perpendicular to occlusal forces

Divergence of M and D walls to avoid unsupported proximal enamel

Question 13

Retention Form (3)

Answer 13

M and D dovetails

Undercut M-B and M-L cusps

friction resistance of vertical walls

Question 14

M and D cavosurface angles should be _______ to their respective ridges

Answer 14

parallel

Question 15

Max molars L pit form

Answer 15

Elliptical form

Question 16

Extend L pit of max molars how far

Answer 16

include all of the affected portion of groove

Question 17

Retention form Max Molars L pit

Answer 17

Retention form:
Mesial and distal walls are parallel to each
other OR slightly converging; retention is
largely frictional resistance to displacement

Question 18

Axial wall of Max molars L pit has an outline form which is what to the external tooth surface-and where?

Answer 18

Parallel and 0.5mm inside the DEJ

Question 19

When do you include the D and L pit in one prep on a max molar?

Answer 19

On an OL, where the groove which connects them is involved

Question 20

On a max molar OL-you terminate the groove extension where?

Answer 20

Just gingival to the termination of the lingual groove

Question 21

Indication for Max molar Class 1 OL

Answer 21

Used when the L fissure connects with the D oblique fissure and D pit on the Occlusal surface

Question 22

M-D isthmus width of L extension on max molar OL should be approximately what? Is there an exception?

Answer 22

1mm-EXCEPT when removing carious or undermined enamel

Question 23

On a max molar OL-When indicated, the preparation should

be cut more at the expense of the ______ and______ rather than _______

Answer 23

cut at the expense of the oblique ridge and buccal cusp rather than centering over the fissure and thus weakening the small DL cusp

Question 24

On a max molar OL-you want to be sure to preserve two things, what are they?

Answer 24

The oblique ridge, but most importantly the small DL cusp

Question 25

The pulpal wall of a Max First molar OL prep may have a slight ______ inclination to conserve dentin support of the distal marginal ridge

Answer 25

Distal

Question 26

Both OL and OB are class 1s, T or F?

Answer 26

True-duh

Question 27

the target axial wall depth on an OL prep on #3 is what?

Answer 27

1.0mm

Question 28

Axial depth is from where to where? Thus it is synonymous with what on an OL?

Answer 28

From the external tooth to the axial wall Thus it is the B-L dimension of the box on an OL

Question 29

on a max molar OL, The occlusal portion may have what to conserve the dentin support

Answer 29

the occlusal portion may have a slight distal inclination (from gingival to occlusal) to conserve the dentin support of the distal marginal ridge

Question 30

Walls which converge on a max molar OL

Answer 30

M and B walls converge, as does most of the Distal (not the D-O)

Question 31

D wall of a max molar does what on an OL

Answer 31

D-O diverges while the distal wall is convergent

Question 32

Isthmus width for amalgam preps

Answer 32

At least 1.0mm to pass smallest amalgam condenser through

Question 33

A M-D width of what is a DEF on a mx molar OL-or probably any prep?

Answer 33

2.5mm

Question 34

Max ant class 1 prep outline form

Answer 34

Lots of variation-but in general- a rounded triangle with the apex in the pit and the sides corresponding to the M and D marginal ridges

Question 35

Walls are ______ to slightly ______ from the axial wall to the cavosurface on a Max ant class 1 prep

Answer 35

parallel to slightly converging

Question 36

On a max ant class 1, orient the axial wall how? why?

Answer 36

parallel to the external tooth surface in order to avoid pulp exposure

Question 37

How should the bur go in on a max ant class 1?

Answer 37

perpendicular to the lingual surface

Question 38

Total depth of max ant class 1 to not jeopardize pupal tissue

Answer 38

1.5mm

Question 39

Class V outline form clinically

Answer 39

Only extend far enough to remove caries and unsupported enamel

Question 40

Cavosurface bevels on a class V?

Answer 40

NO! Contraindicated

Question 41

Shape of Class V amalgam prep

Answer 41

Kidney bean shaped

Question 42

Cavosurface margins of Class V amalgam prep

Answer 42

90 degrees

Question 43

External wall orientation on a class V amalgam prep

Answer 43

Perpendicular to external tooth-parallel to enamel rods

Question 44

Incisal/O depth of Class V? | Gingival axial depth of Class V amalgam prep?

Answer 44

O=1.25mm | Gingival=0.75mm

Question 45

Axial wall depth of class V in comparison to DEJ

Answer 45

0.5mm inside DEJ

Question 46

Contour of axial wall of Class V prep

Answer 46

Convex!

Question 47

Orientation of all the walls on a class V amalgam prep

Answer 47

All diverging

Question 48

``` Retention of class V amalgam Prep -where are they? depth? orientation? ```

Answer 48

Retention grooves - entirely in dentin - 1/2mm inside the DEJ, regardless of axial wall depth - Orientated O/incisally and gingivally, NOT axially

Question 49

How to include more carious dentin in class V (extend?)

Answer 49

Finger extensions-do not extend full prep

Question 50

Internal walls include?

Answer 50

Internal Walls Axial – parallels long axis, vertical plane of the tooth adjacent to pulp Pulpal - perpendicular to the long axis of the tooth closest to the pulp in horizontal plane

Question 51

Axial wall runs what to the tooth

Answer 51

parallel to long axis

Question 52

Pulpal wall runs what to the tooth

Answer 52

perpendicular to the long axis

Question 53

Line angle

Answer 53

junction of two walls

Question 54

Point angles

Answer 54

junction of three walls