Class II Caries

Question 1

What do early lesions look like?

Answer 1

Chalky-white color

Question 2

What do later lesions look like?

Answer 2

Dark-colored

Question 3

Where are most class II caries located?

Answer 3

Just under the interproximal contact

Due to food impaction, insufficient brushing, no flossing

Question 4

What are the negatives of Class II treatment?

Answer 4

Can damage adjacent tooth
Limited lifetime of the restoration (everything fails eventually)
Weakens the remaining tooth structure (especially cusps)

Question 5

What are the two approaches to prep a Class II?

Answer 5

Occlusal - most common, weakens cusps by removing marginal ridge
Facial/Lingual - mostly for root caries, done as tissue receedes

Question 6

What is the axial depth for a Class II prep?

Answer 6

Premolars = 1mm
Molars = 1.2-1.5mm

Question 7

What are the BL contact dimensions for a Class II prep?

Answer 7

Ideally break contacts with 0.5mm clearance

Question 8

What are some retentive features of a Class II prep?

Answer 8

Convergence of B and L walls

Retentive grooves in gingivo-axial corners of the prep

Question 9

T/F - The farther anterior the Class II, the more retentive features are needed

Answer 9

False - the more posterior, the more retentive features needed to resist extrusive forces
Especially in preps with no occlusal component

Question 10

What types of bands are used for Amalgam Class II

Answer 10

Toffelmire

Contour

Question 11

What types of bands are used for Composite Class II

Answer 11

Sectional Matrix