Restorative & Materials · single question
Which of the following is NOT a crystalline phase of zirconia?
Show answer and explanation
Correct answer: C. Pyramidal
- A. — IS a phase. Tetragonal zirconia is responsible for transformation toughening.
- B. — IS a phase. Cubic zirconia is fully stabilized and highly translucent.
- C. Correct. — NOT a zirconia phase. The three crystalline phases of zirconia are: cubic, tetragonal, and monoclinic. 'Pyramidal' does not exist as a zirconia crystalline phase.
- D. — IS a design type. Monolithic zirconia refers to full-contour (no porcelain overlay) design; it is a fabrication type accepted in the field.
Practice Restorative & Materials questions Restorative & Materials study notes