Infiltration made easy
How do you get ready for using the brush infiltration technique to characterize Zenostar restorations? And how can you achieve optimum results with minimum effort? Here are some pointers:
Take the shade of the prepared abutment tooth into account.
Generally, if you use a material that has a high translucency (e.g. Zenostar MT), you should take the shade of the prepared tooth into account. Whiten severely discoloured preparations before you proceed with the restoration. If not, the prepared tooth structure may show through the restoration. A greyish looking restoration would be the dreaded result. Always use a tooth-shaded die to assess the shade of the restoration in the lab (prior to placement), e.g. using the "Natural Die Kit" from Ivoclar Vivadent.
Complete contouring of the restoration before you sinter it.
Try to rework the restoration as little as possible after it has been sintered. You can achieve this by giving the "white body" as much of its final shape as possible after the milling process. If handled badly, adjustments after the sintering process may have an adverse effect on the mechanical properties of the restoration.
Use up mixed liquids quickly
You can mix the Zenostar MT Color Liquids with Zenostar VisualiZr indicator liquid to make the colours easier to apply. You should, however, be aware that these two components (Zenostar MT Color + VisualiZr) are not permanently colour stable when they are mixed together. For this reason, they should be freshly mixed every time you are using the infiltration technique. As soon as the indicator colour loses its effect, it may falsify the shade of the final restoration. Mixed solutions should be used within 4 hours.
Shades can be mixed
The "Zenostar GI complete" Instructions for Use contain a basic schematic overview of how the desired shades can be reproduced using the infiltration technique. Shades can also be combined. For instance, Zenostar MT Color Liquid in shade A3 may be applied to the cervical area and shade A2 to the body area to achieve a customized solution meeting the requirements of the individual patient.
Raise lightness of shades to match individual requirements
If the available liquids are generally too dark for the restoration being characterized, you can raise their lightness with the help of Zenotec OptimiZr. To do so, you add a few drops of Zenotec Color OptimiZr to the colour liquids, depending on the intensity that you want to achieve. Observe the Instructions for Use of the OptimiZr liquids.
Apply Impulse liquids only selectively
If you apply the Zenostar MT Color Impulse liquids extensively over a large area, the intensity of the dentin liquids - and therefore the final chroma of the restoration - may be diminished. To avoid this effect, apply the Zenostar MT Color Impulse Liquids only selectively to the intended area. In addition, it is advisable to allow the white body to pre-dry for approx. 10 minutes after it has been infiltrated with the Zenostar MT Color dentin shades. Once the dentin shades have predried, the Impulse liquids are applied to the intended areas. In this way, an unwanted increase in brightness in the incisal area can be avoided.
Bright incisal – no liquid in the incisal area
We recommend leaving the incisal/incisal edge untouched by liquid if the patient has a very bright, white incisal. In this case, follow the "Zenostar GI complete" Instructions for Use as usual and leave the upper section free of liquid.
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