CDT CDT Complete Denture Fabrication 2

Question 1

What is the 'try-in' appointment in complete denture fabrication designed to verify?

Accepted Answer

Tooth arrangement, occlusion, esthetics, and phonetics before final processing

Answer

The wax try-in allows assessment and correction of tooth position, occlusal scheme, vertical dimension, and esthetics before irreversible acrylic processing.

Question 2

What is 'processing shrinkage' in acrylic denture fabrication, and how is it managed?

Accepted Answer

Dimensional contraction of acrylic during polymerization; managed by using proper packing and curing cycles

Answer

Acrylic resin shrinks approximately 0.2–0.5% during polymerization, and proper flask packing technique and controlled curing cycles minimize distortion.

Question 3

What is the purpose of 'festooning' the denture wax prior to processing?

Accepted Answer

To carve the wax to simulate natural gingival contours and root prominences

Answer

Festooning shapes the wax base to mimic natural gingival architecture, including root eminences and interdental papillae, for a lifelike esthetic result.

Question 4

Which acrylic resin polymerization method produces the least porosity in a complete denture base?

Accepted Answer

Heat-cured acrylic processed in a water bath at a controlled long-cure cycle

Answer

A long, controlled water-bath heat cure (e.g., 74°C for 8 hours or 74°C/2hr + 100°C/1hr) minimizes residual monomer and gaseous porosity.

Question 5

What is the 'neutral zone' concept in complete denture construction?

Accepted Answer

The space where forces from the tongue and cheeks/lips balance, used to position denture teeth

Answer

The neutral zone is where musculature forces from the tongue and perioral muscles balance, providing the most stable position for denture teeth.

(CDT) Certified Dental Technicians Practice Test

(CDT) Certified Dental Technicians Practice Test

CDT CDT Complete Denture Fabrication 2