Podcast
Questions and Answers
What is a key characteristic of condensation polymerization?
What is a key characteristic of condensation polymerization?
Which stage of polymerization involves the attachment of monomers to the growing chain?
Which stage of polymerization involves the attachment of monomers to the growing chain?
What occurs during the termination stage of polymerization?
What occurs during the termination stage of polymerization?
What type of polymerization is characterized by little shrinkage during curing?
What type of polymerization is characterized by little shrinkage during curing?
Signup and view all the answers
Which type of acrylic is known for curing through heat?
Which type of acrylic is known for curing through heat?
Signup and view all the answers
What is the primary initiator activated during the heat curing process?
What is the primary initiator activated during the heat curing process?
Signup and view all the answers
Which method of curing is primarily used for repairing acrylic and soft denture liners?
Which method of curing is primarily used for repairing acrylic and soft denture liners?
Signup and view all the answers
What key characteristic distinguishes thermosetting polymers from thermoplastics?
What key characteristic distinguishes thermosetting polymers from thermoplastics?
Signup and view all the answers
What factor is NOT a common cause of bubble formation during the curing process?
What factor is NOT a common cause of bubble formation during the curing process?
Signup and view all the answers
Which activator is used in the light polymerizing curing method?
Which activator is used in the light polymerizing curing method?
Signup and view all the answers
Which type of wax is considered to have a high melting point and is plant-based?
Which type of wax is considered to have a high melting point and is plant-based?
Signup and view all the answers
What is a characteristic of synthetic waxes compared to natural waxes?
What is a characteristic of synthetic waxes compared to natural waxes?
Signup and view all the answers
Which wax is primarily used for creating patterns in the lost wax casting technique?
Which wax is primarily used for creating patterns in the lost wax casting technique?
Signup and view all the answers
What is a common property of dental wax?
What is a common property of dental wax?
Signup and view all the answers
Which wax is described as brittle and has a moderate melting point?
Which wax is described as brittle and has a moderate melting point?
Signup and view all the answers
What is the primary use of occlusal registration wax?
What is the primary use of occlusal registration wax?
Signup and view all the answers
What distinguishes impression waxes from pattern waxes?
What distinguishes impression waxes from pattern waxes?
Signup and view all the answers
What is the primary purpose of inlay casting wax?
What is the primary purpose of inlay casting wax?
Signup and view all the answers
Which of the following properties is essential for a wax used in partial denture patterns?
Which of the following properties is essential for a wax used in partial denture patterns?
Signup and view all the answers
Which wax type is used primarily for boxing in dental lab work?
Which wax type is used primarily for boxing in dental lab work?
Signup and view all the answers
What characteristic distinguishes sticky wax from other types of wax?
What characteristic distinguishes sticky wax from other types of wax?
Signup and view all the answers
What is the function of sprue wax in dental applications?
What is the function of sprue wax in dental applications?
Signup and view all the answers
Which property is NOT essential for the inlay casting wax mentioned in the content?
Which property is NOT essential for the inlay casting wax mentioned in the content?
Signup and view all the answers
What is the main disadvantage of using sticky wax?
What is the main disadvantage of using sticky wax?
Signup and view all the answers
Which type of wax is specifically designed for creating tactile sensations in dental frameworks?
Which type of wax is specifically designed for creating tactile sensations in dental frameworks?
Signup and view all the answers
What is the primary consequence of failing to seal gypsum adequately?
What is the primary consequence of failing to seal gypsum adequately?
Signup and view all the answers
What is the first historical use of Polymethyl Methacrylate (PMMA)?
What is the first historical use of Polymethyl Methacrylate (PMMA)?
Signup and view all the answers
How does cross-linking affect polymers?
How does cross-linking affect polymers?
Signup and view all the answers
Which of the following describes a copolymer?
Which of the following describes a copolymer?
Signup and view all the answers
What effect does higher molecular weight have on polymers?
What effect does higher molecular weight have on polymers?
Signup and view all the answers
What happens during polymerization?
What happens during polymerization?
Signup and view all the answers
Study Notes
Types of Dental Waxes
- Baseplate wax
- Border wax
- Box wax
- Card wax
- Corrective impression wax
- Inlay pattern wax
- Occlusal registration wax
- Resin wax
Wax Properties
- Amorphous materials with high molecular weight and low surface energy
- Low thermal conductivity
- High heat capacity
- Insoluble in water
- Made up of two or more different waxes with additives (natural and synthetic)
Wax Components
- Gums
- Fats
- Fatty acids
- Oils
- Resins
- Pigments
Wax Uses
- Casting
- Constructing non-metallic denture bases
- Registering jaw relations
- Laboratory work
Natural Waxes
- Organic compounds
- Melting range varies due to impurities
- Carnauba wax: hard, high melting point, plant-based (flakes on leaves)
- Beeswax: plant-based, hard-melting
Impression Waxes
- Originally used for impressions
- Does not work well with undercuts
- Soft waxes used on stock trays with alginate to improve peripheral border molding (aid in comfort)
- Pliable, can be used without heating
Pattern Waxes
- Used to form patterns for lost wax casting techniques (e.g., crowns, bridges, partial dentures)
- Used in the lost wax technique: wax is removed, replaced with acrylic or ceramic
Lost Wax Technique
- First introduced in 1907
- Direct technique: wax molded in patient's mouth
- Indirect technique: wax formed on a model in the lab
Inlay Casting Waxes
- Paraffin, gum dammar, carnauba
- Must be strong, stable
- Must create fine detail, easily carved without flaking
- Burnout cleanly (no residue)
- Partial denture wax patterns
Other Wax Types
- Brittle waxes.
- Moderate melting point
- Soft paraffin wax: low melting point, petroleum based
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This quiz covers the various types of dental waxes, their properties, components, and uses in dentistry. Learn about natural and impression waxes, as well as their applications in crafting denture bases and other dental procedures.
