GLAZING AND STAINING TECHNIQUE overglaze in jar thoroughly 2 Mix with a spatula if separation is seen. applying the stain and 1 Before overglaze material, remove all dirt desired amount of 3 Remove CELTRA overglaze paste a different consistency is 4 Ifdesired, adjust the consistency a thin layer of the 5 Apply overglaze material all over the customization is needed, take 6 Ifa little of the corresponding 8 and grease from the restoration. crown surfaces using a staining brush. Make sure not to apply the overglaze material either in too thick or too thin of a layer. A thin layer will result in a matte finish. A thick layer can result in puddling or pooling of the stain. crowns directly on 9 Position the ceramic honeycomb tray or firing cotton and fire according to the firing instructions. from jar to tray. body and incisal stains and position it on the tray. by diluting the material with Stain and Glaze liquid. Anterior and Bicuspid frameworks should be slightly filled with Super Peg II and a looped pin must be placed to prevent unit from falling. if needed and apply on 7 Dilute the crown. After the first firing, if the consistency of the overglaze was too thin, the restoration may come out under-glazed. If that is the case, apply a thin layer of the CELTRA overglaze material all over the crown surface using a brush. Once the overglaze is applied, conduct the second stain and overglaze firing procedure according to the firing schedule. POLISHING TECHNIQUE Start with a Diamond: Rubber Porcelain Polishers: 1 1 Use a medium grit rubber wheel of your choice. 2 For the occlusal surface, use a point shape. An electric handpiece should run at 10,000 RPM to a maximum of 15,000 RPM, with only light pressure used. Electric handpieces have constant torque even at a slow speed, so they are more effective than air driven handpieces. Begin the process with the medium shine wheel. Use a fine grit diamond in a friction grip slow speed handpiece ONLY to remove the excess from the mill. An electric handpiece is more effective than one that is air driven. the handpiece at a low speed 2 Run max 15,000 RPM. Avoid a high-speed handpiece because it will create excessive heat and trauma to the ceramic. 3 Next, use the fine grit rubber wheel and/or point shape with the same technique as described above. 4 Finish with the fine grit rubber wheel. 5 For an effective high shine, use polishing paste. Polishing paste should be used with a bristle brush wheel in a slow speed latch handpiece. This is very effective for polishing grooves in the posterior anatomy. THE DOs AND DON’Ts DO DON’T Always position crowns on a ceramic honeycomb tray. As an alternative option, a firing pad can be used. Do not add thinner inside the overglaze jar, always place it on the tray/glass slab in order to dilute to the right consistency. Note: To decrease/eliminate the imprint that the firing pad may leave on the restoration, use a metal mesh firing pad. Do not use water to clean the brush. Water should never be incorporated in any stains or glaze. Use thinner to clean the brush between different shades. If you use metal pins to support the CELTRA restoration, use a loop pin with Super Peg II to prevent the unit from falling and fracturing. Always use the exact manufacturing firing instructions. Don’t accelerate cool down, and be sure to use Super Peg II, not Object Fix®. If you must use refractory material, use Super Peg II. Restoration must cool on tray for 2 minutes post firing. CELTRA DUO FIRING SCHEDULES Initial Stain & Glaze DENTSPLY Paint-On Glaze C F Initial Stain & Glaze Indenco Spray-On Glaze C F Add-On/Stain/Correction Paint-On or Spray-On Glaze C F Initial Stain & Glaze 0 0 0 0 0 0 Preheat/Low Temp. Closing Time Heat Rate Increase High Temp. Hold Time Cooling Time/Temp. 500 3:30 55 820 1:30 3:00/750 923 3:30 131 1508 1:30 3:00/1382 500 1:00 55 820 1:30 3:00/750 923 1:00 131 1508 1:30 3:00/1382 500 2:00 55 770 1:30 3:00/700 923 2:00 131 1418 1:30 3:00/1292 Object Fix is a registered trademark of Ivoclar Vivadent AG. © 2015 Dentsply Caulk, a Dentsply International company. All Rights Reserved
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