Characterization and glazing

Laboratory Session

Bisque Bake Porcelain

• Bisque bake porcelain is adjusted and contoured as necessary with green stones

Characterization and Glazing of Porcelain

• Provides luster or gloss of porcelain

• The surface layer of porcelain and fill surface defects

• Some dentists do in house characterization with stains

• Degree of glazing depend on # of cycles

• TOO GLAZED is unnatural

Armamentarium• Porcelain furnace• Clean glass slab (clean white

paper)• Sable brushes• Distilled water or special liquid• Stain powder• Hemostat

Characterization and Glazing

• Increase shade match

• Difficulties and inaccuracies

• Modifications are expected

• Request porcelain in bisque

• Stain kits available

Stain kit

“Staining” or Shade modification

• Increasing Chroma or value is the simplest

• Decreasing Chroma or Value is the MOST difficult

• It is applied with a sable brush and special liquid where needed

• Characterization a better term

• Hypocalcified areas

• Proximal coloration

• Enamel cracks

• Stained crack lines

• Exposed dentin

“Staining” or Shade modificationexercise is to increase the Value

or….

Glazing of Porcelain• Glazing is applied in

all surfaces• Most glazing is done

under 1600 F• In PFM’s metal must

be polished again (next session)