Explain, with the use of diagrams,how to sprue porcelain crowns forpressable ceramic materials
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Dental Technology Mapa Mental sobre Explain, with the use of diagrams,how to sprue porcelain crowns forpressable ceramic materials, criado por Alice Dolman em 02-05-2019.
Explain, with the use of diagrams,how to
sprue porcelain crowns forpressable
ceramic materials
Sprues are attached to the wax veneer or crown patterns and invested using a special refractory investment to
produce a mould, capable of being injected with the E.Max Lithium Disilicate ceramic ingots.
Sprue to the incisal edge using the sprue ring provided. If more
than one investing, place restorations opposite each other on the
ring.
The Sprue should be at the correct angle, ensure your restoration follows the same angle. This should then be
between 45-60̊ to the base.
sprue diameter- 2.5- 3mm
Attachment point- thickest part of wax up (generally cusps)
Sprue angle- axial
Design of attachment points- rounded and slightly tapered, no sharp
angles or edges