Digital Technologies

Question 1

what is the digital workflow

Answer 1

• scanning
• manufacturing
• prostheses

Question 2

what does CAD/CAM stand for

Answer 2

computer aided design computer aided manufacturing

Question 3

digital dentistry provides improvements in

Answer 3

-adaptation and material properties for better treatment/better prognosis
- esthetic outcomes
- improved process for operator/dentist for better outcomes
- improved experience for patients for better outcomes

Question 4

what are the considerations for the adaptation of the restoration/prosthesis

Answer 4

• dimensional accuracy and stability
• setting expansion of dental stone
• polymerization shrinkage

Question 5

decreased candida adherence leads to:

Answer 5

increased density and reduced residual monomer

Question 6

what is the height of the preparation and the step bur and what is the name of the step bur

Answer 6

12 S and doesnt exceed 12mm

Question 7

what is the width of the preparation and the steps burs and names

Answer 7

• step bur 12: 0.8mm
• step bur S: 1.25mm
• this width should not be less than 1mm (0.8-1.25mm)

Question 8

what are the tooth preparation requirements

Answer 8

• the height of the preparation
• the width of the preparation
• vertical axial walls (should not be greater/taller than 4-5mm)
• sharp angles
• “holy” zone (overmill)
• finish line design
• minimum thickness (1mm)
• undercuts

Question 9

what degree is the step bur 12S

Answer 9

3

Question 10

ensure that any internal angle has a diameter:

Answer 10

greater than 1mm

Question 11

what is the holy zone

Answer 11

cusps should be at least 1mm in diameter

Question 12

what should finish lines be refined with

Answer 12

a fine/superfine diamond bur

Question 13

what is the summary for tooth prep requirements

Answer 13

• sufficient tooth reduction (adequate strength of ceramic material)
• rounded internal angles (passive adaptation, prevents fractures)
• smooth tapered walls (passive adaptation)
• well defined finish lines
• exit angles approaching 90 degrees- ensures bulk of ceramic at the margin for strength

Question 14

scanning requires:

Answer 14

• the camera to visually access the structures to be captured
• moisture controlled environment

Question 15

when is gingival retraction/displacement required

Answer 15

when the finish line is at the gingival level or subgingival level