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What is the purpose of using the Biogeneric Variation Tool?
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The Biogeneric Variation Tool is used for adjusting anatomical features and ensuring proper tooth morphology.
What are the benefits of applying a consistent thin layer of glaze?
It provides a smooth and even finish, ensuring the crown has a realistic appearance with minimal flaws.
Why is it useful to make occlusion red during the position phase?
Making occlusion red helps highlight areas that require further adjustments.
Why is model axis alignment particularly significant for anterior cases?
Setting the model axis is important for anterior cases to ensure the arch fits within the outlined shape and aligns correctly with the occlusal plane.
Describe the process of mixing stain with glaze for color application.
Mix stain with glaze at a 50/50 ratio and apply this mix to areas that require color before baking.
How do you ensure optimal tooth contacts using the adjustment tools?
Use the 'Adjust Contacts' tool, aim for green contacts, and set occlusal strength to -175.
What are the set parameters for an Emax posterior crown in terms of spacer and contact strength?
Spacer: 100-140 (120 as medium), Occlusal & Dynamic Contact Strength: -175.
Why should the marginal thickness be increased to 90 for an Emax crown?
Increasing the marginal thickness to 90 helps in preventing chipping of the crown.
When should you disable the 'Keep Contacts' option?
Disable 'Keep Contacts' for smoother adjustments when making significant positioning changes.
How does the 'Scale' tool assist in the position phase of crown design?
The 'Scale' tool helps in adjusting the fitting of the tooth shell to the prep and margins for a better control over the design.
What are the primary goals in designing a single unit posterior crown?
Efficient design techniques, perfect contacts and occlusion, stain and glaze techniques, and choosing the appropriate shade for an Emax crown.
How should you choose the shade for an Emax crown?
Match the shade to the lightest portion of the tooth to avoid a too-dark final result and use lighter shade blocks for translucent effects, such as BL1 for HT.
In what scenarios is manual marking of margins preferred over automatic marking?
Manual marking is preferred in areas where the margin meets tissue or is not distinctly ledged or supragingival.
What is an alternative staining technique for more control over the final color?
You can stain first and then apply glaze for more precision in color application.
What does the presence of yellow indicate during the insertion axis phase?
Yellow indicates undercuts on the prep, which should be minimized especially near the margin.
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