What is the purpose of an opaqueporcelain layer in the ceramo-metalprocess? Explain what would happen ifthis layer is omitted
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Dental Technology Mapa Mental sobre What is the purpose of an opaqueporcelain layer in the ceramo-metalprocess? Explain what would happen ifthis layer is omitted, creado por Alice Dolman el 02/05/2019.
What is the purpose of an opaqueporcelain
layer in the ceramo-metalprocess? Explain
what would happen ifthis layer is omitted
These powders are used as the initial layer when constructing bonded restorations.
Its function is to bond the porcelain onto the alloy and mask out the metal substructure.
Porcelain bonds to the metal substructure chemically, an oxide produced by Tin,
Indium, Zinc or Iron is incorporated in both the alloy and opaque powders which
produces molecular bonding.
OPAQUE PORCELAIN: in metal-bonding porcelains, this porcelain powder is used for two reasons:
1. To bond the porcelain veneer to the metal substructure
If the opaque porcelain layer is not applied then a
metal-porcelain failure will occur, this is when a fracture
occurs, leaving a clean surface on the metal due to no
oxides being present to adhere to.
2. To mask out the dark colour of the metal substructure
Also opaque porcelains increase the brightness/value this adds to
the aesthetics of ceramics, without this layer the metal
substructure will be more visible, or harder to cover.