class I cavity prep

Question 1

simple class I prep: pits and fissures: __surfaces of posterior teeth

Answer 1

occlusal surfaces of posterior teeth

Question 2

simple class I prep: ___ of the molars

Answer 2

buccal or lingual pits of the molars

Question 3

simple class I prep: __ of anteriors

Answer 3

lingual pit of anteriors (cingulum)

Question 4

two cavities should not be united unless the separating ridge is less than

Answer 4

0.5mm

Question 5

do not extend into __ of maxillary molars unles it is undermined by caires

Answer 5

obliqure ridge

Question 6

do not extend into __ of mandibular 1st premolar unless it is undermined by caries

Answer 6

transverse ridge

Question 7

cavity outline should extend around the ___(conservative approach)

Answer 7

cusps

Question 8

shape: flowing curves around

Answer 8

triangular ridges

Question 9

should not exceed 1/3 intercuspal distance (preferably 1/4)

Answer 9

isthmus

Question 10

depth of cavity prerp shoud be ___mm into dentin and __ on the ivorine teeth

Answer 10

0. 2-0.5mm into dentin

1. 5-2.0mm on ivorine teeth

Question 11

__dovetail is wider because __ fossa is wider

Answer 11

mesial wider because mesial fossa is wider

Question 12

the 2 opposing walls converge occlusally around central groove

Answer 12

buccal and lingual walls

to follow the direction of the enamel prisms and provide mechanical lock for amalgam retention

Question 13

keep the bur angulation with the

Answer 13

long axis of the tooth

Question 14

buccal and lingual walls __ around the remaining developmental (primary) grooves if any at all

Answer 14

diverge

Question 15

diverge the __ walls slightly toward the occlusal to follow the direction of the enamel rods without involving the marginal ridge

Answer 15

mesial and distal walls

Question 16

__mm of tooth structure shoudl be left between cavosurface margin and the proximal contact area

Answer 16

1.6mm

Question 17

dont slope pulpal flood except for the

Answer 17

mandibular 1st premolar

Question 18

criteria for the pulpal floor

Answer 18

flat and smooth

perpendicular to the long axis of the tooth

1.5mm depth

Question 19

depth of the punch cut

Answer 19

1.3mm - slightly short of the length of the 330 bur

Question 20

pulpal depth around the triangular ridges

around the fossa

Answer 20

2.0-2.25mm

around fossa - 1.5-1.75mm

Question 21

when naming things, what is the order/preference

Answer 21

1. axial
2. mesial
3. distal
4. facial
5. lingual
6. occlusal/incisal
7. gingival
8. pulpal