Directions For Use. Zirconia. Minimum occlusal wall thickness: 0.5 mm, including a 0.1 mm reserve for occlusal adjustment

Transcription

1 Zirconia ht Minimum occlusal wall thickness: 0.5 mm, including a 0.1 mm reserve for occlusal adjustment Conservative circular preparation, minimum wall thickness 0.4 mm Marginal region, minimum wall thickness 0.2 mm Directions For Use Manufactured for: DENTSPLY International Inc. DENTSPLY Ceramco 570 West College Ave. York, PA 17401, prosthetics.dentsply.com Distributed by: DENTSPLY Canada 161 Vinyl Court Woodbridge, Ontario L4L 4A /2014 DENTSPLY Ceramco All Rights Reserved. REF Rev. 1 (02/14)

2 Zirconia ht Cercon ht blanks are made of yttriastabilized zirconia (Y-TZP). They are used in fabricating frameworks for fixed prosthetic restorations using Cercon brain / Cercon brain expert. They are made of a ceramic oxide material characterized by particularly highstrength. Depending on the framework design, Cercon ht frameworks can be veneered with ceramics or inserted as fully anatomical restorations. With fully anatomic restorations, no space is required for the ceramic veneer, which may allow the dentist to preserve more of the tooth structure. Using Cercon brain / Cercon brain expert, your restorations and frameworks are individually fabricated to your digital design specifications such as anatomic shape, framework wall thickness and connector diameter or cementing gap. Always use the most current version of the design software, as this may influence the production of your restorations. INDICATIONS Cercon ht is indicated in the anterior and posterior segments for: Crowns Telescopic primary crowns Multi-unit bridges up to 16 units (with no more than two pontics between abutment crowns) Cercon ht can be used as a substructure (framework) which is then veneered with a dental veneering ceramic or can be used for full-contour application (without veneering) as well. In the case of Telescopic primary crowns the substructure is not veneered. CONTRAINDICATIONS In patient hypersensitivity to zirconia or one of the other ingredients, this medical product may not be used at all or only under the particular scrutiny of the dentist or physician in charge. Bruxism or recalcitrant parafunctional habits (as usual for all ceramically veneered frameworks) Insufficient available space Inlay bridges Endodontic posts Endosseous implants WARNINGS Known cross-reactions or interactions of this medical product with other medical products or material already present in the oral environment must be taken into consideration by the dentist in charge when selecting this medical product. PRECAUTIONS Please note: Keep product dust away from eyes Avoid any contact with mucosa After use, wash your hands and apply a hand cream When using, do not eat or drink, do not ingest, do not inhale dust particles Use local suction and suitable mouth/face protection during grinding Processing the material will result in the release of dust that may cause irritation of the eyes, skin or respiratory passages. The safety and warning notes listed here describe how to use our system components in a safe and risk-free manner. Notify the dentist in charge of all 1

3 factors described above if you use this medical product for a custom design and make sure to comply with the Instructions for Use and the pertinent Safety Data Sheets (SDS). ADVERSE REACTIONS We are not aware of any risks or adverse reactions related to Cercon base / Cercon ht. If properly processed, adverse reactions of this medical product are highly unlikely. However, reactions of the immune system (such as allergies) or localized paraesthesia (such as an irritating taste or irritation of the oral mucosa) cannot be completely ruled out as a matter of principle. INSTRUCTIONS Framework dimensions (anterior and posterior): Wall thickness Single crowns Margin thickness Single crowns Wall thickness Bridges Margin thickness - Bridges 0.4 mm 0.2 mm 0.5 mm 0.2 mm Additional dimensional requirements for the anterior region: Number of pontics 2 Connector cross section 6 mm 2 Additional dimensional requirements for the posterior region: Number of pontics 2 Connector cross section 9 mm 2 Cantilever pontic at tooth position (only one pontic, up to one premolar width) Connector cross section for this cantilever pontic Up to second premolar 12 mm 2 2

4 General notes on framework design: Make sure the occlusal surfaces are not modified by severely deepening existing fissures, as this might compromise the stability of the material. (Figure 1) Note that a shallow occlusal relief will increase the life expectancy of fully anatomic restorations. When manually finishing the frameworks, never deepen the interproximals (connectors) with cutting wheels, disks, or other rotary instruments, as this may cause fracturing. (Figure 2) Figure 1 Figure 2 Technical specifications: Type II, Class 6 (according to DIN EN ISO 6872; 2008) CTE: 10.5 ( C) Modulus of elasticity: 210 GPa Composition (in mass %): Zirconia Yttria 5% Hafnium oxide <3% (Cercon ht) Alumina and silica < 1% (Total 100%) Sintering Cercon ht: Note: The Cercon heat CANNOT be used to sinter Cercon ht zirconia. The Cercon heat has a maximun temperature of 1350 C (2462 F) which is too low. You must use a suitable sintering furnace. made of Cercon ht are sintered at 1500 C (2732 F). 1-8 Manual finishing after sintering: 9-16 C Starting Ramp 40 min 120 min Ramp min 120 min Cool 270 min 270 min F Starting Ramp 40 min 120 min Ramp min 120 min Cool 270 min 270 min Note: Zirconia should be finished using diamond instruments with proper irrigation. Keep the pressure on the framework material to a minimum and work only in one direction. Sandblast the finished areas once again with alumina [ µm, 3

5 max. 3 4 bar (44-58 psi), 45 angle]. Finally, clean the framework using a steam cleaner. General: Notably, reproduction of the custom shade is potentially influenced by: Die shade Colour of the material used for temporary/definitive cementing Wall thickness of the framework Use of liner Build-up technique: It is recommended to use Ceramco PFZ, or Cercon ceram kiss / Cercon ceram press porcelains for veneering zirconia frameworks. Make sure to follow the applicable Directions for Use. (Figure 3, 4 Figure 5 In-laboratory polishing: Unveneered zirconia frameworks should not be inserted without polishing them to a high luster or sealing them with a glaze in order to protect the antagonists from abrasion. In addition, polishing or glazing the restoration supports patients in their efforts at oral hygiene. & 5) Figure 3 Shading Cercon ht: Milled Cercon ht is a translucent white material. To achieve a tooth colored material, utilize one of the available dipping solutions in the market. In most cases, you should try to achieve a base color that is slightly less chromatic than the final shade. This will allow you the ability to customize the shade for optimal results. Figure 4 In-office polishing: Comprehensive studies have demonstrated the abrasive effect of Cercon ht on the antagonist not to exceed that of commercially available ceramic veneers or lithium disilicate ceramics not even after adjusting or polishing. Shades finalized by staining may result in bright spots where the stain was removed during occlusal adjustment. 4

6 For customers using the Compartis service, we recommend the following procedures. Staining technique: SmartSourcing To achieve the shade, Cercon ht Full Contour crowns are shaded slightly light in chroma. This allows the user to stain the various areas of the tooth to achieve the optimal shade. For tooth-colored staining of fully anatomic Cercon ht restorations, we recommend the Cercon Stain and Glaze kit (part number ). (Figure 6) However, other stains designed to be used with zirconia may also be used, including Ceramco PFZ and Cercon ceram kiss. Firing schedules may be found in Table 1. Mix the Cercon glaze (Glasur) with the Ducera Liquid STAIN, to a thin consistency. Apply a thin mixture to the crown. It is not necessary to do a separate firing. Use the following chart to complete the shade. (Figure 7 & 8) Figure 6 Figure 7 Figure 8 Fire according to Table 1. Table 1. If the final crown has too high of a sheen, lower the High in 5 C (41 F) increments to achieve the desired sheen. If the final crown has too low of a sheen, increase the High in 5 C (41 F) increments to achieve the desired sheen. C Dry Preheat Low Heat Rate High Start Stop Air Cool PFZ Stains/Glaze Cercon ceram kiss Stains/Glaze Cercon Stain & Glaze F Dry Preheat Low Heat Rate High Start Stop Air Cool PFZ Stains/Glaze Cercon ceram kiss Stains/Glaze Cercon Stain & Glaze

7 Shades Keyed to Vita * Classical Shades A1 A2 A3 Apply a second coat of the body mixture and fire. A3.5 A4 B1 B2 B3 B4 C1 C2 C3 C4 D2 D3 D4 Apply an Ivory stain wash and a blue (Strato) on the incisal and fire. Apply an Ivory stain wash and a blue (Strato) on the incisal and fire. Apply an Ivory stain wash and a blue (Strato) on the incisal and fire. * Vita is a registered trademark of Vita Zahnfabrik H. Rauter GmbH & Co. 6