17930916
Beschreibung
Mindmap von Alice Dolman, aktualisiert more than 1 year ago
|
Erstellt von Alice Dolman
vor mehr als 5 Jahre
|
|
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.
- 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.
- 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.
- 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.
- 1. To bond the porcelain veneer to the metal substructure
Möchten Sie kostenlos Ihre eigenen Mindmaps mit GoConqr erstellen? Mehr erfahren.