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17 Cards in this Set
- Front
- Back
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Dicor |
* 1st castable ceramic *1.5 mm circumferential reduction *allows crystalline formation * surface staining for color * Cementation: adhesive or cemented |
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Willi's Glass |
Dicor layered with feldspathic porcelain |
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Ceramming |
* controlled crystallization * Determined by time and temperature of heat treatment * too much crystallization= TOO opaque |
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Empress 1 |
LEUCITE REINFORCED * tetragonal crystallographic configuration * need a full contour wax up * Melting of ingot ( use heat +pressure ) *ceramming process *abrasion resistance= same natural teeth *final shade: staining/layering feldspathic porc * Adhesive cem: can compensate for short CC |
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Empress 1 Continued |
* pressable ceramics: inlays, onlays, veneers and crowns. * Leucite crystal in glass prevent crack propagation in glass phase and tensile strength. * crystal grown during ceramming * semi- translucent material *Flexure strength: 134 Mpa |
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Empress 2 |
LITHIUM DISILICATE * Fluroapatite crystals allow for opalescence * pressable ceramics: inlay, onlay, veneers, crowns * Full contoured waxup or CAD/CAM milling *abrasion resistance= same as natural tooth *ceramming process
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Empress 2 Continued |
* final shade adjust by staining/layering feldspathic porc *Wear compatible to natural teeth * higher edge strength * adhesive cementation * Flexure strength: 350Mpa
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EMax (Ivoclar Vivadent) |
GLASS CERAMIC LITHIUM DISILICATE * Can be pressable or CAD/CAM milled * Flexure strength: 360-400 Mpa * can be adhesively bonded to tooth whereas Zi cannot.
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PRESSABLE |
*Needle like lithium disilicate crystals embedded in glassy matrix
* polyvalent ions dissolved in glass provided the desired color |
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CAD/CAM Milled Blocks: Intermediate Phase |
BLUE TRANSLUCENT STATE * polyions in diff oxidation states, therefore blue color
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Sinistered to.... |
* reach their final crystallized state and their high strenght, acheieves desired tooth color/opacity when lithium metasilicate --> lithium disilicate during sintering process. |
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Procera |
* Densely sintered high purity aluminum oxide coping * CAD/CAM: digitized, milled/pressed, sintered, porcelain application * flexure strength: 687 Mpa (worst)
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Procera CAD/CAM |
*prep: deep chamfer, no sharp angles * scan die * Cpu fabcricates enlarged refractory die, lab fab sintered alunious oxide coping * Sintering (20%) shrinkage * lab applies porcelain on coping |
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Zirconia |
* transition metal= elcellent physical props * addition of Y2O3 allows retention of tetra form at room tmep: high tougness, prevents crack propag. * presintered blocks for milling *sintering= ~25% shrinkage * Flexure Strength: 800-1000 Mpa *(best) |
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Zirconia transformation Toughening |
During heat process, addition of Y2O3 allows retention of tetragonal structure at room temp, thus arresting crack propagation and leading to higher toughness. |
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Zirconia Milling ( green state) |
* softer, therefore decreased temperature, then sintering heals any milling induced defects |
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Zirconia Milling (milling core after sintering) |
High temp milling may cause surface damge and defect formation, and may decreased life span of restoration
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