02 CAD/CAM Inlays and Onlays Flashcards
For posterior CAD/CAM crown preps, what is the ideal occlusal reduction
1.5-2.0 mm
What is the margin design for a posterior CAD/CAM crown
1 mm Heavy chamfer, shoulder, or butt joint
How much taper is on a posterior cad/cam crown ideally
6-10 degrees
cad/cam anterior full crown prep facial and lingual reduction
1.0-1.5 mm
cad/cam anterior crown incisal reduction
1-2 mm
cad/cam anterior crown reduction at the margin
1 mm
cad/cam anterior crown taper
6-10 degrees
What type of margin do you want on an anterior cad/cam crown
chamfer or shoulder
How many planes of reduction should a cad/cam anterior crown have
3
What is an inlay
it is similar to a filling that fits inside cusp tips at the center of the tooth’s surface
how does an onlay differ from an inlay
it is more extensive and extends over at least one cusp….or the entire biting surface of the treated tooth
Why should the margins have sharp edges for a cad/cam onlay?
so they are easily identifiable
what is the minimum occlusal reduction for a cad/cam onlay
1.5 mm
what is the angle of the internal axial walls in a cad/cam onlay
6-10 degrees
How much interproximal flare is used for a cad/cam onlay
100-120 degrees
What type of margin is used in a cad/cam only
butt joint
Ideal CAD/CAM Inlay Dimensions
Margins: \_\_\_\_ \_\_\_\_ Occ Redux: \_\_\_\_\_\_ Internal Ax Walls \_\_\_ \_\_\_ Int Line angles Intrprx Flare \_\_\_\_\_ Isthmus width \_\_\_\_\_ Isthmus depth \_\_\_\_\_
Sharp edges 1.5-2 mm 6-10 degrees Rounded 100-120 1.5-2.0 mm >1.5 mm
What should you avoid in your prep design
sharp angles
What will cause overmilling
If the diameter of the bur is larger than a section of the prep
What type of margin is to be avoided for CAD/CAM inlay onlys
feather edge
What is the highest degree of translucency for e.max
hT
What is the indications for IPS Empress CAD
Single tooth restorations
Ceramir Technique
- Leave prep slightly ________
- No _____ agent required.
- Do not use _____, primers or other treatments
- Etch lithium disilicate with ___ ______ acid for ___ seconds
- Mix cement and load crown with Ceramir
- ___ minutes working time
- Clean up gel phase at ___ minutes
- Fully set at ___ minutes
9 ____ which fosters ________ formation between tooth and material
- Moist
- bonding
- silane
- 5%, hydrofluoric
- 2
- 3
- 5
- Bioceramic, nanocrystal
Esthetic cements require a ______ primer for bonding to _______ based ceramics or _______ primer containing _______ monomer for bonding to zirconia based ceramics
silane
silica
ceramic
acidic
What is the coupling agent between the inorganic porcelain and organic resin cement
Silane primer
For higher bond strength to zirconia
Apply tribochemical silica coating to the restoration and use silane primer
What is Tribochemical silica coating?
Impact energy blasted silicate particles that produce bonding between the silicate and target surface by mechano-chemical means
What materials do you use a ceramic primer with?
alumina and zirconia
What is the universal restorative primer
Monobond plus
What is monobond a combo of
Silane methacrylate
Phosphoric acid methacrylate
Sulfide methacrylate
How long does monobond need to react
60 seconds
