zirconium Flashcards
what are the properites of zirconia
Type of metal which is long lastinga nd indestructible
why does a dentist like zirconia
Long lasting Indestructible Body does not reject zirconia Safe to use Prefered over porcelain fused to metal
What is the white powdered metal used to create dental crowns bridges and others
Zirconium oxide( zirconia)
Why did Zirconia replace gold and stainless
Creates a white translucent tooth
INdications of zirconia
Anterior and Posterior Crowns and bridges
Post and core (endo)
Implants and abutments
Ortho brackets
Contraindications for Zirconia
Reduced inter occlusal space
Deep vertical overlap
Opposing supra erupted tooth
Very short clinical crown
Advantages of Zirconia
Superior esthetics Easy prep and cementations Optimal fit (CAD/CAM( Hight strength ( fracture and crack resistance as well as good flexural) Excellent insulating behavior Biocompatible
Disadvantage of zirconia
Expensive
Difficult to re intervine (posts for endo)
Bond between veneer ceramic and zirconia frameowk is weak component in the layered strucutre
Non available longitudinal study
What is the most proven Crown type
Porcelain-fused-to-metal, with over 50 years of use
What is the most esthetic restorations
Lithium disilicate
Longest-lasting crown restorations
Properly fabricated and seated cast-gold alloy
Do dentist use only 1 type of restoration
no
Problems with PFM/MCC crowns
Increased Opacity
Porcelain chips
Marginal discoloration
When is Zirconia most recommended
Molars and premolar single unit or short span posterior bridges
What are the Uses of PFM in the future
Long-span prostheses, precision attachment placement, others
