16 Questions
What is the purpose of a working cast in dentistry?
To replicate the prepared teeth, ridge areas, and other parts of the dental arch
What is the main factor determining the accuracy of a cast-and-die system?
The accuracy of the impression or optical capture
What is the purpose of an interocclusal record in dentistry?
To record the occlusal relationship between the maxillary and mandibular teeth
What is the purpose of a master cast in dental procedures?
To replicate the prepared teeth, ridge areas, and other parts of the dental arch
What is a requirement for dental casts?
Exact reproduction of surfaces
Which type of gypsum produces acceptable surface details for fixed prosthodontics?
Type IV and V
What is a characteristic of resin die materials compared to gypsum?
Greater abrasion resistance
When are flexible die materials used?
For interim restorations
What are the essential laboratory steps for making dies?
Vacuum mixing, trimming, and creating interocclusal records
Which concepts are important in occlusal adjustment?
Canine guidance and group function
What are elastomeric materials, such as polyvinyl siloxane (PVS), used for?
Bite registration
What is essential for stability in big cases?
Hard baseplate wax and acrylic resin
What can be used for digital design, scanning, and milling for same-day implant restorations?
Virtual definitive cast-and-die system
What is the purpose of discernible unprepared tooth structure in dental casts?
Accurate duplication
What may resin die materials experience during polymerization?
Minor shrinkage
Which materials are similar to heavy bodied silicone or polyether impression materials?
Flexible die materials
Study Notes
Dental Cast and Die Materials and Techniques
- Requirements for dental casts include exact reproduction of surfaces, precise articulation, accurate duplication without bubbles or voids, and discernible unprepared tooth structure.
- Gypsum is an inexpensive die material available in five forms, with types IV and V producing acceptable surface details for fixed prosthodontics.
- Resin die materials offer greater abrasion resistance than gypsum, but are more expensive and may experience minor shrinkage during polymerization.
- Flexible die materials are similar to heavy bodied silicone or polyether impression materials and are used for interim restorations, indirect composite resin inlays, and onlays.
- Laboratory steps for making dies involve vacuum mixing, trimming, and creating interocclusal records for maximum intercuspation and centric relation.
- Canine guidance and group function are important in occlusal adjustment, with conformative occlusion and reorganized occlusion being key concepts in restoration.
- Elastomeric materials, such as polyvinyl siloxane (PVS), are used for bite registration, with hard baseplate wax and acrylic resin being essential for stability in big cases.
- After mounting the maxillary and mandibular casts, a virtual definitive cast-and-die system can be used for digital design, scanning, and milling, allowing for same-day implant restorations.
Test your knowledge of dental cast and die materials and techniques with this quiz. Explore topics such as gypsum and resin die materials, flexible die materials, laboratory steps for making dies, occlusal adjustment, elastomeric materials, and digital design and milling for implant restorations.
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