Table 4.

Advantage and disadvantage of scanners

Scanner	Advantage	Disadvantage
CEREC AC-Bluecam	Distortion-free image	Needs coatings
	Automatic shake detection system
	Image stabilization systems
	Have in office milling unit
iTero	No need to apply any coatings to the teeth	Larger scanner head
Generates a colored 3D-virtual model	No in office milling units
Can have output files in STL format
E4D	In office milling units	Must be held at a specific distance from the target Occasionally needs coatings
Lava COS	Capturing 3D data in a video sequence Improper scanning shows hole in image, re-scanning can be done and software patches the hole	Needs coatings No in office milling units
TRIOS	Variation of the focal plane without moving the scanner	No in office milling units

3D: Three-dimensional, STL: Standard Tessellation or Stereolithographic File