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Class V Amalgam Preps
Finals - Fall 2010
12
Biology
Post-Graduate
12/04/2010

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Cards

Term
Where is the location of class V
Definition
In the gingival third
Term
Class V- what is the axial depth
Definition
.65 minimum
Term
class V, the prep should be .65 that is .15 of enamel and .5 into dentin. If enamel is thicker than .15 what do you do?
Definition
Make sure you are at the minimum .5 into dentin. 
Term
Class V Is the axial wall straight?
Definition
No follow the contour of the tooth.
Term
Class V Describe Axial line angle as it meets other walls?
Definition
Line angles should be curved 
Term
Name the wall of a class V prep?
Definition
mesial, distal, occlusal, and gingival wall
Term
Why follow the contour of the tooth?
Definition
To maintain the minimum amount of axial depth
Term
What happens when areas of defect go deeper then the minimal depth in the axial wall?
Definition
make a minimal prep design then specifically address the other areas. The whole prep is not adjusted just the area of lesions or defects. 
Term
How do you create retention in a class V prep?
Definition
undercut the occlusal and gingival walls. they measure .25 in each direction. Place in the sound dentin already exposed. Don't continue to extend axially 
Term
Where are the retentive grooves added?
Definition
 Gingival and occlusal wall, must extend .25 into dentin
Term
What type of bur is used to place retentive groove in class v?
Definition
Use a 33.5 inverted cone bur or a 1/4 round bur.
Term
With class V the walls are planned using what hoe?
Definition
10-4-8
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