CAD/CAM Digital Dentistry Flashcards
7 cards from real CDT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 CAD/CAM Digital Dentistry flashcards as text
Which type of CAD/CAM block is indicated when maximum translucency is required for an anterior veneer restoration?
Answer: Feldspathic porcelain or high-translucency lithium disilicate block
Feldspathic and high-translucency lithium disilicate blocks mimic natural enamel optical properties best for anterior esthetics.
What is the purpose of applying a digital articulator in CAD software during crown design?
Answer: To simulate jaw movement and verify occlusal clearance in dynamic excursions
A virtual articulator replicates condylar guidance angles to check for interferences during protrusive and lateral movements.
Which surface treatment is recommended before bonding a CAD/CAM lithium disilicate crown to increase micromechanical retention?
Answer: Hydrofluoric acid etching followed by silane application
HF acid etching creates microporosity in the glass matrix that silane then chemically bridges to the resin cement.
In a full-arch implant-supported fixed prosthesis designed via CAD, why is a milled titanium bar often preferred over a printed polymer bar?
Answer: Titanium provides superior long-term strength, biocompatibility, and passive fit accuracy
Milled titanium offers proven biocompatibility, high fatigue resistance, and dimensional precision critical for passive fit on multiple implants.
What does 'sprue placement' refer to in CAD software for milling PMMA or wax blanks?
Answer: The attachment point connecting the restoration to the blank holder during milling
Sprues hold the milled restoration in the blank during machining and are cut away after milling is complete.
Which measurement validates the internal gap between a CAD/CAM crown and its die during quality control?
Answer: Die spacing measured in micrometers via silicone replica technique or micro-CT
The silicone replica technique or micro-CT allows quantification of cement space thickness, typically targeted at 50–120 µm.
Which CAD/CAM material is most appropriate for fabricating a long-term provisional crown lasting 6–12 months?
Answer: PMMA (polymethyl methacrylate) milled block
Milled PMMA blocks produce strong, accurately fitting temporaries with good esthetics suitable for extended provisionalization.