CDT Ceramics & Porcelain Techniques Flashcards
6 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 6 CDT Ceramics & Porcelain Techniques flashcards as text
What is the purpose of degassing (oxidizing) a metal coping before porcelain application?
Answer: To create a controlled oxide layer that promotes porcelain adhesion
Degassing creates a controlled, thin oxide layer on the metal surface that chemically bonds with the opaque porcelain.
Which type of ceramic is most commonly used for full-contour posterior restorations due to its strength and wear resistance?
Answer: Zirconia
Zirconia offers the highest flexural strength among dental ceramics, making it ideal for full-contour posterior crowns and bridges.
What does 'value' refer to in the Vita shade system?
Answer: The lightness or darkness of the shade
Value describes the relative lightness or darkness of a shade, ranging from very light (high value) to very dark (low value).
What is the recommended firing temperature range for most feldspathic dental porcelains?
Answer: 700–850°C
Feldspathic dental porcelains typically fire between 700°C and 850°C, depending on the specific formulation and manufacturer guidelines.
What is 'metamerism' in shade matching?
Answer: Two colors that appear to match under one light source but differ under another
Metamerism occurs when two materials look like the same color under one light condition (e.g., dental light) but differ under another (e.g., natural daylight).
Which finishing technique is used to create surface texture on ceramic restorations that mimics natural enamel?
Answer: Characterization with porcelain texturing stones and polishing
Texturing stones and rubber polishing points are used to create perikymata, stippling, and other natural enamel surface features before glazing.