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Dental Ceramics — Types & Systems

Dental Materials • NEET MDS Study Guide • AI-Generated Notes

⭐ High-Yield Facts for Exam

  • Feldspathic = most esthetic, weakest.
  • Leucite-reinforced = IPS Empress.
  • Lithium disilicate = IPS e.max (popular).
  • Zirconia = strongest, more opaque.
  • Glass ceramics: HF etch + silane bonding.

Dental Ceramics

  • Feldspathic porcelain — most esthetic but weakest; used for veneering.
  • Leucite-reinforced — e.g., IPS Empress; improved strength with good esthetics.
  • Lithium disilicate — IPS e.max; strong and esthetic, very popular for crowns/veneers.
  • Zirconia — the strongest dental ceramic (high flexural strength/toughness) but more opaque; used for high-load and full-contour crowns/bridges.

Fabrication

CAD-CAM milling (and pressing/layering) allows precise, efficient ceramic restorations. Bonding protocols differ (HF etch + silane for glass ceramics; specific primers for zirconia).

Exam Tips ⭐

Feldspathic = most esthetic/weakest; lithium disilicate (e.max) = popular; zirconia = strongest, more opaque.

📝 Practice MCQs — Dental Ceramics — Types & Systems

Q1. The strongest dental ceramic is:
A. Feldspathic
B. Leucite-reinforced
C. Lithium disilicate
D. Zirconia
Show Answer
✅ Answer: D
Zirconia has the highest strength/toughness among dental ceramics.
Q2. IPS e.max is based on:
A. Feldspar
B. Leucite
C. Lithium disilicate
D. Zirconia
Show Answer
✅ Answer: C
IPS e.max is a lithium disilicate glass-ceramic.
Q3. The most esthetic but weakest ceramic is:
A. Feldspathic porcelain
B. Zirconia
C. Lithium disilicate
D. Alumina
Show Answer
✅ Answer: A
Feldspathic porcelain is most esthetic but lowest strength.
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