class 1 preparation

Question 1

what is the goal of operative dentistry

Answer 1

preserve or prevent if possible
only restore if necessary
all restoration eventually need to be replaced

Question 2

penetrates in a narrow or cone shaped channel to the DEJ then spreads laterally

Answer 2

caries progression

Question 3

____ remains in a completed prepration, whether intentional or by accident

Answer 3

residual caries

Question 4

location of class one lessions

Answer 4

1- occlusal surface of premolars and molars
2- occlusal 2/3 of facial and lingual surfaces of molars
3- lingual surface of upper anterior teeth
4- any other usually located pit or fissure

Question 5

how to diagnose decay regardless of classification?

Answer 5

1- location of decay
2- see it, feel it , diagnose it
3- sharp eye, dull explorer

Question 6

not all color change is decay t/f

Answer 6

True

Question 7

need a minimum of ____mm to prevent fracture of the restoration

Answer 7

1.5

Question 8

need at least 1.5 mm of restorative material or may not resist ______

Answer 8

occlusal force/ may fracture

Question 9

all line and point angles should be rounded but defined to _____

Answer 9

avoid stress concentrations

Question 10

converge provide _____

Answer 10

primary retention

Question 11

facial pit outline

Answer 11

takes the shape of the lesion
minimum diameter 0.75 mm
maximum diameter 1.5 mm (for dentoform)
align bur perpendicular to facial surface