Numbers Flashcards
What’s the initial depth of Class I in DEJ?
0.2 mm (for posterior teeth: 1.5 - 2.0 mm)
How deep in DEJ for Class II?
0.2 mm
What is the axial wall for Class III into dentin?
0.2 mm
What is the depth of a Lingual prep inside DEJ?
0.2 mm
What are the dentinal depths of the Axial wall of the proximal box?
Crown: 0.5 - 0.6 mm
Root: 0.75 - 0.8 mm
How much should be the remaining dentin thickness to place Resin Modified Glass Ionomer (RMGI) cement?
0.5 -1.5 mm
How much should be the remaining dentin thickness to place Calcium Hydroxide liner?
0.5 mm
How much is the width for bevelling?
0.5 - 2.0 mm
What is the angle to the
external surface when bevelling?
45-degree angle
How wide are the slots?
1 mm
How deep are the slots?
1 mm
How much is the length of the slots?
2 - 4 mm
How much are the slots in DEJ?
0.5 – 1.0 mm
What is the pinhole position relative to the DEJ?
1 mm in dentin
What is the pinhole position relative to the external tooth surface?
1.5 mm
How much is indicated for the axial depth inside the DEJ if retentive grooves are required?
0.5 mm
How much to establish (ideally) with adjacent proximal surface facially, lingually, and gingivally?
not more than 0.5mm
What is the preparation of functional cusps and non-functional cusps for a complex amalgam?
functional cusps: 2 mm
non functional cusps: 1.5 mm
What is the pinhole depth?
around 2 mm
How long should you condensate amalgam?
2.5 - 3.5 min
What is the initial depth of Class V restoration?
- 5 mm in DEJ
0. 75 - 0.8 mm in cementum for root caries
Recommended mesiodistal width of lingual extension of class I, OL?
1 mm
How much is the thickness of ferrule dentin?
1 mm
How much is the height of ferrule dentin?
2 mm
How far from the facial or lingual DEJ are the retention grooves
and how deep?
From DEJ: 0.2 mm
Deep: 0.5 mm
How much is the required gingival clearance for class II?
FROM ADJACENT TOOTH: 0.5 mm max
Facial must stay in contact
What is the initial depth to DEJ for posterior teeth?
1.5 - 2.0 mm
How long to light cure a composite?
40’’
How long to light cure adhesive?
20’’
How deep should the increments of a composite be?
2 mm
How deep to prepare another pinhole from the original?
1.5 mm
What should the cavo surface and marginal amalgam be far extensive prep class I?
Cavo surface 90 - 100 degrees
Marginal amalgam 80 degrees
How close to the proximal surface should we extend in a class II?
0.8 mm away from cutting through the marginal ridge
What should be the minimal distance from margin of cavity to proximal surface?
1.6 mm premolars
2 mm molars
What should be the maximum width at the isthmus of a cavity prep class I?
No more than 1/3 of intercuspal distance
What is the initial depth of class I?
1.5 - 2 mm measured from the central fissure
Which Bur do we use for class I restoration?
245
Which Bur is used to make retention grooves in class II?
1/4 round bur # 169
What should be the recommended isthmus width in class II on occlusal surface?
No wider than 1/4 intercuspal distance. It is wider than class I at proximal box
What is the guideline for formation of the proximal box in class II?
extend gingivally past either caries or occlussal contact (whichever is deeper)
2/3 expense of enamel 1/3 expense dentin
What is the minimum thickness of a Class I
amalgam restoration?
a. There is no minimum thickness.
b. 1mm.
c. 1.5mm.
d. 2.5mm.
c. 1.5mm
