Flashcards in Class II Caries Deck (11)
What do early lesions look like?
What do later lesions look like?
Where are most class II caries located?
Just under the interproximal contact
Due to food impaction, insufficient brushing, no flossing
What are the negatives of Class II treatment?
Can damage adjacent tooth
Limited lifetime of the restoration (everything fails eventually)
Weakens the remaining tooth structure (especially cusps)
What are the two approaches to prep a Class II?
Occlusal - most common, weakens cusps by removing marginal ridge
Facial/Lingual - mostly for root caries, done as tissue receedes
What is the axial depth for a Class II prep?
Premolars = 1mm
Molars = 1.2-1.5mm
What are the BL contact dimensions for a Class II prep?
Ideally break contacts with 0.5mm clearance
What are some retentive features of a Class II prep?
Convergence of B and L walls
Retentive grooves in gingivo-axial corners of the prep
T/F - The farther anterior the Class II, the more retentive features are needed
False - the more posterior, the more retentive features needed to resist extrusive forces
Especially in preps with no occlusal component
What types of bands are used for Amalgam Class II