Podcast
Questions and Answers
What is the purpose of attaching a sprue to the wax pattern in casting procedures?
What is the purpose of attaching a sprue to the wax pattern in casting procedures?
Why is wax sprue preferred over plastic or metallic sprue in casting procedures?
Why is wax sprue preferred over plastic or metallic sprue in casting procedures?
In which technique is the wax pattern prepared on the cast, but the final adjustment is made inside the patient's mouth?
In which technique is the wax pattern prepared on the cast, but the final adjustment is made inside the patient's mouth?
What is the purpose of constructing a wax pattern using an indirect technique?
What is the purpose of constructing a wax pattern using an indirect technique?
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What role does a sprue play in allowing molten alloy to flow into the mold during casting?
What role does a sprue play in allowing molten alloy to flow into the mold during casting?
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Study Notes
Sprue in Casting Procedures
- A sprue is attached to the wax pattern to provide a pathway for molten alloy to flow into the mold during casting.
Advantages of Wax Sprue
- Wax sprue is preferred over plastic or metallic sprue because it can be easily melted out of the mold, allowing for a smooth, unobstructed flow of molten alloy.
Direct and Indirect Techniques
- In the indirect technique, the wax pattern is prepared on the cast, but the final adjustment is made inside the patient's mouth.
Purpose of Indirect Technique
- The purpose of constructing a wax pattern using an indirect technique is to create a precise replica of the desired shape, ensuring a accurate fit in the patient's mouth.
Role of Sprue in Casting
- A sprue plays a crucial role in allowing molten alloy to flow into the mold during casting, ensuring a successful casting process.
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Description
Test your knowledge of casting procedures in dentistry, including the construction of wax patterns, the lost wax process, and the reproduction of accurate castings. Learn about the techniques used for creating restorations like inlays, onlays, crowns, bridges, and denture bases.
