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Radiodensity Restorative Material-Dental Ceramic, Dyandra Wirahana Hasan -…
Radiodensity Restorative Material-Dental Ceramic
Radiodensity
Radiolucent
Refers to structures that are less dense and permit the x-ray beam to pass through them
It will appear in black or dark color
Radiopaque
Refers to structures that are dense and resist the passage of x-rays
In will appear in White or light color
indirect
Acrylic
Radiodensity
prosthetic acrylic resins are radiolucent and cannot be imaged using standard radiographic techniques
Gold Crown
Radiodensity
A large radiopaque restoration with smooth borders
Stainless Steel
Radiodensity
Radiopaque
Metal Porcelain
Radiodensity
Thin radiopaque line outline
Porcelain may appear more radiolucent than opaque, due to a lack of filler or density
All Ceramic
Radiodensity
porcelain restorations are slightly radiopaque and resemble the radiodensity of dentin.
All Ceramic
Radiodensity
restorations are radiopaque enough to be seen on radiographs and to be distinguishable from tooth structures
direct
Amalgam
the amalgam filling will appear bright white or radiopaque because the filling metal are too dense
High-copper amalgam includes 40-60% silver, 27-30% tin and 13-30% copper and 1% zinc set with mercury, these are metal component that is extremely dense, so X-radiation does not penetrate it as well as it does soft tissues
Composite Resin
it has the same or greater thickness of aluminium, this material appers radiopaque
GIC
Type
Type 2A
mostly radiopaque
Type 2B
always radiopaque
Type 1A
it is radiopaque bit less radiopaque than dentin
Type 3
always radiopaque
the radio opacity of GIC are affected by the composition of glass powder
Dental Ceramic
Types
Classifications based on Anusavice
Processing Method
Firing temperature
Principal; crystal phase or matrix
composition
microstructure
Use or indication
translucency
fracture resistance
abrasiveness
Classifications based on Craig
Based on fabrication method
sintered porcelain
cast porcelain
machined porcelain
based on the crystalline phase
Based on applications
all ceramic
to make ceramic veneers and ceramic onlays
Ceramic Implant Abutments and Implants
Metal ceramic
restorations for posterior teeth and long-span bridges
The alloy substructure is closest to the prepared tooth
give a natural teeth like color
The opaquing ceramic blocks the color of the alloy from showing through the other ceramic layers
Properties
High hardness
High elastic modulus
Low ductility
Good dimensional stability
Good wear resistance
High resistance to chemicals
High weather resistance
Relatively high melting point
Definition
Dental porcelain is a dental material used by dental technicians to create biocompatible lifelike dental restorations, such as crowns, bridges, and veneers
Dyandra Wirahana Hasan - 2106717682