Porcelain dental material JPW

for dental restorationsfor dental bridgessolid

JPW is a white, high noble porcelain dental alloy with exceptional properties. The alloy has an unusually light oxide, lighter than most other alloys with a similar gold content. This means your opaque will cover the coping easily and completely. JPW’s average grain size of 12 microns eliminates hot tears and marginal flaking. Because it contains 15% Ag, it may be a more cost-effective choice when high nobility is desired. Category: Porcelain Nobility: High Noble Color: White Composition: 49% Au, 31.5% Pd, 15% Ag Ideal for: Any type of restoration from single units to long-span bridges. WAXING Wax to a minimum thickness of .3mm for single units and .5mm for bridge work. Avoid sharp angles and wax to provide for an even thickness of porcelain. SPRUING The indirect method is recommended for multi-units. Use an 8 gauge (3mm diameter) runner bar with a10 gauge (2.5mm diameter) connectors. If preferred, the direct method may be used on both single units and small bridges. Use a 10 gauge (2.5mm diameter) sprue 1/4” to 3/8” (6mm to 9mm) long. Sprues longer than 3/8” (9mm) should have a reservoir 1.5mm from the pattern. Patterns should be a maximum of 6mm from the top of the investment. INVESTMENT A phosphate-bonded, high heat investment with or without carbon content is recommended. BURNOUT 1400ºF (760ºC) MELTING AND Wind casting arm one turn more than usual. Use a multi-orfice torch tip with 10 psi gas CASTING pressure and 20 psi oxygen pressure. Continue heating until the cloudy surface clears, releasing casting arm. DO NOT OVERHEAT. DO NOT USE CASTING FLUX. The casting temperature is 2425ºF (1330ºC). .