Clinical Procedures & Protocols Flashcards

When communicating shade information to a dental laboratory, which method provides the most accurate and reproducible color documentation?

Answer: Digital shade matching with spectrophotometer readings

Spectrophotometers provide objective, reproducible numerical color data that eliminates subjective interpretation errors inherent in verbal or visual shade communication.

During the try-in phase of a porcelain restoration, the ceramist notices a slight color mismatch under dental operatory lighting. What is the most appropriate next step?

Answer: Evaluate the restoration under multiple light sources before making adjustments

Evaluating color under multiple light sources (metamerism check) ensures the restoration matches in all clinical lighting conditions before any irreversible corrections.

What is the primary purpose of using a die spacer in fixed prosthodontic procedures?

Answer: To create space for the luting cement film thickness

Die spacer creates controlled space between the restoration and the prepared tooth to accommodate the cement luting film, ensuring proper seating and marginal fit.

A ceramist receives a case with a preparation margin that transitions from supragingival anteriorly to subgingival posteriorly. How should this affect fabrication protocol?

Answer: Adjust wax-up and ceramic layering to address varying visibility zones

Mixed margin locations require zone-specific ceramic planning — visible supragingival areas demand higher aesthetic detail while subgingival zones prioritize marginal seal.

Which occlusal contact pattern is most desirable for posterior all-ceramic restorations in centric occlusion?

Answer: Multiple tripod contacts distributing forces evenly

Tripod contacts distribute occlusal forces across multiple stable points, reducing stress concentration that could fracture all-ceramic restorations.

When fabricating a ceramic restoration for a patient with bruxism, which material modification is most appropriate?

Answer: Increase ceramic thickness and consider zirconia-based materials

Bruxism generates excessive occlusal forces requiring increased ceramic thickness and high-strength substrates like zirconia to resist fracture.

What is the standard protocol for verifying the internal fit of a ceramic crown before final cementation?

Answer: Use of fit-checking spray or silicone disclosing medium on internal surface

Fit-checking spray or silicone disclosing medium applied to the internal crown surface reveals high spots and contact areas that need adjustment for optimal seating.