Ceramics Flashcards
Indirect Ceramic Restorations
crowns, bridges, jacket crown, vaneers, inlays/onlays, dentures
Ceramic Properties
Mechanical - porcelain = brittle
Thermal - electric/thermal insulators
Harder than tooth
Esthetically pleasing
Optical Properties of Ceramics
Translucency - light reflection
Chroma - degree of saturation (shades A-D)
Ceramics - how they’re made
Inorganic metal oxides baked at high temp to fuse small particles together
Glass Based Ceramics:
Porcelain, Leucite, Lithium Discilicate (strongest)
Non-Glass Ceramics:
Zirconia
PFM advantages
good mechanical properties, precise fit, colors/shades, stain resistant
PFM disadvantages
opaque - light not transmitted through wear - opposing enamel or restorations
Porcelain Vaneers advantages
esthetics, fix spacing/gaps, reshapes teeth, cracks, covers stain, evens/adds length
*high fracture rate
Lumineers
.02mm reduction of tooth structure - - compared to 3-5mm for vaneers
Role of RDH: Ceramics
assess/identify, administer professional care, ensure proper OSC, continued ed.
+use sharp curettes, no scalers, ultrasonic only in sulcus, avoid air polishers
How to identify Ceramics
explorer, light strokes, air, illumination, radiographs
Ceramics considerations
margins, crown contour, improper temps.
*gingival health important
Polishing/Stain removal Ceramics
no coarse/medium paste, aluminum oxide strips, floss paste interproximal
Composite Paste
aluminum oxide paste