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25 Cards in this Set
- Front
- Back
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When should Diagnosti waxing occur (ideally)?
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-Ideally, after control-phase treatment, immediately prior to initiating fixed prost. TX or designing RPD's
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What is the indication of DX waxing at UNC or practice
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-Cases involve indrect restoration (onlay, crown, FPD or RPD)
-Case where significant alterations in contour or involve demanding restorative/esthetic results |
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What is the rationale for DX waxing?
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-Develop, preoperatively, the intended occlusal and axial contours of final restoration or articulated DX casts
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What is the purpose of DX wax?
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-Develop occlusal scheme
-Determine if preparation alteration is required -Provide template for dental lab -Evaulate reductions with thermoplastic index -Fabricate provisionals with thermoplastic index -MOCK preps |
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What is the DX waxing?
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-Roadmap that directs you and lab technician how to restore pt.
-Pre-treatment guide to help determine wheter you can restore patient -Show pt. your proposed final treatment |
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What are the advantages of DX waxing?
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-Roadmap
-Pre-TX guide -Proposed final TX |
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Why is it important not to add wax to the lingual of the anterior teeth?
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-Anterior teeth will not occlude correctly.
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Why is it important to soak your cast prior to duplicating it?
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-Keep alginate from sticking to the cast
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What is the advantage of Thermoplastic shim?
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-Less expense
-Clear so you can judge tooth reduction -Very accurate for multi-unit prostheses (FPDs) |
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END OF LECTURE 1
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END OF LECTURE 1
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Does the crown type impact the cement I select?
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-If crown is translucent, color of cement will affect the final shade, this is crown material specific
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What is the rationale in adjusting the proximal contact from the gingival aspect towards the incisal?
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-As you take from the gingival toward the incisal the crown will sit better
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Why use black fit checker for an all-ceramic crown?
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All ceramic crown is white so using a black fit checker will help to help if contact occurs
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What is the rationale behind temporarily cementing a crown?
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-Trial cements can be used to confirm final appearance
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What type of cement (auto cure, light cure, dual) should be used?
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Setting results from light cured and self cured cements increase the fracture resistance of ceramic materials that can be etched and silanated
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Describe a quick procedure of All ceramic delivery right before cementation?
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-Inspect intaglio surface and seats on die
-Remove provisional, pumice, seat crown -Adjust proximal contacts, margins, verify internal fit (black GC fit checker) -Adjust occlusion and contours -Polish crown with Dialite porcelain (BPG) |
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Cementation of All-ceramic crown?
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-Place in acetone ultrasonic
-If crown etchable (retract tissue, place Mylar strip, etch tooth, Rinse and dry, apply bonding agent and cure) -Crown not etchable (Sandblast intaglio surface w/ 50 um Al2O3). -Tack crown in place with small curing tip and keep pressure on crown -Remove XS cement, Floss interproximal, Light cure completely -Scalpel to remove interproximal XS |
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It is acceptable to use cement systems with try-in water soluble cement pasts (for composite cement systems) T/F
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True
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What are crowns that can and can NOT be etched?
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-Etchable: Feldspathic porcelains, IPS Empress (Leucite)
-Non-etchable: Alumina or Zirconia core |
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When adjusting occlusion on an All-Ceramic crown what is needs to be done?
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-Cement crown in place with GC fit checker (black)
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Inform patients of post cementation sensitivity due to?
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-Ass. with freshly prep/etched dentin
-Remnants of etching acid -Low pH of certain cements -Increase liquie to power ratio of GI cemetns -Over etching, desiccation (collapse of dentinal tubules) |
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If temporarily cementing all-ceramic crowns (do not do what)?
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-DO NOT use cement containing eugenol as it inhibits polymerization of the resin
-If eugenol cement was used, etching w/ 37% Phosphoric acid after cleaning w/ pumice (best way to remove ZOE) |
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You must be cautious when using Panavia 21 cement system, WHY?
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-Phosphonate molecule is sensitive to O2 and its with Ca of tooth
-Requires air barrier coating (at margins) to allow full set of cement |
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Silane applicaiton to intaglio surface an increase the ceramic-resin cement bond by 10% (T/F)
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False: 20%
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END OF LECTURE 2
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END OF LECTURE 2
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