CDC Laboratory Techniques & Technology 2

Question 1

Which digital workflow step converts a scanned STL file into a milling or printing path?

Accepted Answer

CAM processing

Answer

CAM (Computer-Aided Manufacturing) processing translates the CAD design into toolpaths or print instructions for the fabrication device.

Question 2

When using a dental milling unit to produce a zirconia crown, what is the purpose of the pre-sintering stage the blank is in?

Accepted Answer

It is partially sintered, making it softer and easier to mill

Answer

Pre-sintered (green or white) zirconia is in a partially sintered state that is softer, reducing tool wear during milling before final sintering.

Question 3

A ceramist notices micro-cracks forming along the margin of a pressed ceramic restoration after divesting. The MOST likely cause is:

Accepted Answer

Too-rapid bench cooling of the investment

Answer

Rapid cooling of the investment ring creates thermal shock and uneven contraction, producing marginal micro-cracks in the ceramic.

Question 4

Which bonding agent chemistry is most appropriate for cementing a high-translucency zirconia restoration?

Accepted Answer

MDP-containing resin cement

Answer

MDP (10-methacryloyloxydecyl dihydrogen phosphate) monomers chemically bond to zirconia's oxide surface, providing durable adhesion.

Question 5

In a dental laboratory, the primary purpose of an articulator's condylar guidance setting is to:

Accepted Answer

Replicate posterior disclusion during excursive movements

Answer

Condylar guidance reproduces the arc of condylar movement so the articulator mimics posterior tooth disclusion during lateral and protrusive excursions.

(CDC) Certified Dental Ceramist Practice Test

(CDC) Certified Dental Ceramist Practice Test

CDC Laboratory Techniques & Technology 2