DCD

Question 1

What is CAD/CAM?

Answer 1

a field ofprosthodontics in dentistryusing CAD/CAM (computer-aided design and computer-aided manufacture) to improve the design and creation ofdental restorations

Question 2

What are the work process steps of CAD/CAM system?

Answer 2

1. scanning
2. designing
3. manufacturing

Question 3

What is digital scanning?

Answer 3

used to convert a physical model into digital 3D computer-aided design (CAD) file

Question 4

What is intra-oral scanning?

Answer 4

• allows you to take a scan of the natural teeth and gingiva
• this saves you an extra work step and makes impression-taking more pleasant and time-saving than ever before
• not indicated for lower ridge due to the difficulties of tongue and saliva

Question 5

What is extra-oral scanning?

Answer 5

• versatile and reliable aid for all digitalization tasks in dental laboratories (scanning casts)
• more indicated for complete denture construction

Question 6

What is designing?

Answer 6

• design software analyzes the entire image and uses the results to calculate excellent restoration proposals
• this allows you to save time and arrive at the last step in the process
• manufacturing –> much more quickly

Question 7

What is manufacturing?

Answer 7

the final step of your work process, converting your design to an accurate and well fitting estoration

Question 8

What is subtractive milling?

Answer 8

• subtractive manufacturinginvolves material removal with turning, milling, drilling, grinding, cutting, and boring
• the material is typically metals or plastics, and the end product has a smooth finish with tight dimensional tolerances

Question 9

What is 4-axis milling machine used for?

Answer 9

for crowns and bridges

Question 10

What is wet cooling?

Answer 10

using coolant

Question 11

What is dry cooling?

Answer 11

without coolant

Question 12

What is the 5-axis milling macine used for?

Answer 12

prosthesis

Question 13

What is additive 3D printing?

Answer 13

a process of joining materials to make objects from 3D model data, usually layer upon layer, as opposed to subtractive manufacturing methodologies

Question 14

How many visits take place for DCD?

Answer 14

2

Question 15

What is in the 1st patient visit?

Answer 15

• digital impression
• jaw relation by occlusion blocks

Question 16

What are the lab steps after digital impression?

Answer 16

• digital construction of occlusion blocks
• assembling models in virtual articulator
• designing of artificial teeth using software program
• manufacturing

Question 17

What happens in the 2nd patient visit?

Answer 17

denture delivery

Question 18

What are the advantages of digital complete denture workflow
over laboratory steps of complete denture construction

Answer 18

• decreased the numbers of clinical and laboratory steps
• digital construction of occlusion blocks (trial denture base)
• virtual mounting and set up of teeth (digital designing)
• denture processing replaced by manufacturing (milling or 3D printing)