Phibo CAD-CAM. Protocol Porcelain Veneering on Phidia, the Zirconia by Phibo. We decode nature.

Transcription

1 Phibo Protocol Porcelain Veneering on Phidia, the Zirconia by Phibo We decode nature.

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3 Table of contents 1. Preliminary Considerations 4 2. Devices 6 3. Procedure 7 4. Observations 8 5. Material: Zirconia Phibo 9 3

4 1. Preliminary Considerations To successfully fuse porcelain veneering onto Phidia, the Zirconia by Phibo, the following aspects of the design of the structure should be taken into consideration: w The structure reproduces the final shape of the reduced piece, as the design may influence the success or failure of the ceramic restoration on Zirconia. w The structures have to be designed with compensation (fully anatomical design with reduced final volume adapted to the ceramic coating). The thickness of the porcelain covering the surface of the structure must be uniform. w The minimum thickness of Phidia structures must be 0.2 mm on the marginal line, and 0.5 mm for the rest of the piece for screw-retained structures, and 0.5 mm over the whole piece for cement-retained structures. w When designing structures with more than one piece, ensure bond stability in areas between the abutments and pontics. The minimum cross-section for the connectors should be 9 mm 2. 4

5 Make sure that the CTE (coefficient of thermal expansion) of the porcelain coating is similar to that of Phibo Zirconia (CTE: 11,4 x 10-6 K -1 ). The structure should not be retouched. Phidia structures should not be sandblasted, as this procedure could cause phase changes and result in surface tensions that may cause cracks in the long term. If it is absolutely essential to retouch and/or sandblast a structure, prevent any adverse effects by only using tools for Zirconia and/or fine-grain diamond burs and sand-blast with aluminium oxide of a maximum of 125 µm at no more than 4 bar pressure. On completion of the retouch or sand-blasting, the structure should be heat treated at 1000 C during 15 minutes to revert the phase transformation and restore the initial properties of the material after sintering. The required conditions of cleanliness must be maintained to prevent contamination of the structure during the process. 5

6 2. Devices Porcelain kiln Porcelain (Wash / Dentin / Incisal) Steam machine Diamond burs and silicone tips 6

7 3. Procedure Step 1 Clean the Phidia structure with steam. The structure must be free of grease and grime. Once clean, prevent any contamination. Step 2 Preparatory wash: Apply the preparatory coat (Wash) to the structure and fire it according to the porcelain manufacturer s instructions. apply cocción Step 3 1st firing for dentin and incisal: Apply dentin and incisal and fire according to the porcelain manufacturer s instructions. apply firing Step 4 2nd firing for dentin and incisal: Apply dentin and incisal and fire according to the porcelain manufacturer s instructions. apply firing Step 5 Finish: Revise and polish the restoration with diamond burs. Apply glaze and cosmetics and fire according to the porcelain manufacturer s instructions. Step 6 Final result: The finished piece in the model. 7

8 4. Observations w The best results are achieved when the CTE of the porcelain coating is slightly lower than the CTE of the structure material. w The thickness of the porcelain layer must be even over the entire coated surface. w The thickness of the porcelain layer should not exceed 2 mm. The ideal thickness is between 0.7 and 1.2 mm. w Reduce any residual thermal stress present in the porcelain coating, particularly in large restorations with considerable material thickness, by means of slow cooling after the last firing process. 8

9 5. Material: Zirconia Phibo ZrO 2 (Tetragonal zirconium oxide, partially stabilised with Yttria, Y-TZP) Phidia by Phibo complies with Medical Device Directive 93/42/EEC Type II Class 2b, 4, 5, 6 (Classification as per ISO 6872:2008 standard). CHEMICAL COMPOSITION ZrO 2 +Hf 2 O 3 +Y 2 O 3 > 99 Y 2 O < 5.4 Hf 2 O 3 5 Al 2 O 3 < 0.5 Other oxides < 0.5 PROPERTIES UNITS VALUE Density ρ (g/cm 3 ) 3.5 Coefficient of thermal expansion (CTE) α (K -1 ) 11.4 x 10-6 Vickers hardness of sintered disks GPa 13 (1326 HV) Microstructure: grain size µm 0.60 Solubility µg cm -2 < 100 Radioactivity Bq g U, 232 Th < 0.03 Flexural strength of sintered discs MPa

10 Protocol Porcelain Veneering on Phidia, the Zirconia by Phibo Phibo Headquarters P. I. Mas d en Cisa Gato Pérez, Sentmenat Barcelona Spain T F info@phibo.com Phibo Benelux Hal Trade Center Bevelandseweg AZ Heerhugowaard Nederland T +31 (0) info.benelux@phibo.com Phibo Chile Calle Apoquindo 6314 O fic i n a5 0 1 Comuna de Las Condes Ciudad de Santiago Chile M (56 9) info.chile@phibo.com Phibo France 17/19 rue du Mont d Est, 6 ème Etage Noisy-le-Grand France T info.france@phibo.com Phibo Middle East North Africa Dubai Airport Free Zone Offi ce 5WA 226 Dubai United Arab Emirates T Info.emirates@phibo.com Phibo Colombia Av Cra # Of. 304 Bogotá. D.C. Colombia T info.colombia@phibo.com Phibo Deutschland Schwanheimer Str Bensheim Deutschland T F info.germany@phibo.com Phibo Italy Centro Direzionale M i l a n o fi o r i Strada 4, Palazzo A Assago Milano Italy T F info.italy@phibo.com Phibo Portugal P. D. Nuno Álvares Pereira, nº 20, Fracção BC Matosinhos Portugal T F info.portugal@phibo.com REF: PROTCERPHIEN_rev001 Este documento ha sido revisado y aprobado en We decode nature.