6.1 3D Surface Digitization

Question 1

Define digital workflow

Answer 1

Any workflow that occurs primarily through the use of converting physical or “analog” structures into a digital format to be manipulated using CAD software

Question 2

What are the two types of scanners used for 3d surface data acquisition?

Answer 2

1. Optical scanners

2. Contact scanners

Question 3

Define tesselation

Answer 3

Division of a surface into smaller polygons, yielding a higher level of detail

Question 4

What is the file format used for object capture?

Answer 4

Standard tessellation language (STL)

Question 5

Digital impression techniques are clinically acceptable for what two clinical situations?

Answer 5

1. Fabrication of crowns and short FPD’s

2. Fabrication of implant-support crowns and FPD’s

Question 6

Which are more accurate, direct or indirect scanners?

Answer 6

Indirect scanners have higher accuracy