Podcast
Questions and Answers
What is the primary characteristic of heat-cured resin?
What is the primary characteristic of heat-cured resin?
- Cures by heating over a long period (correct)
- Forms by addition reaction without by-products
- Requires halogen light for curing
- Cures at room temperature
Self-cured resin requires heating to initiate the curing process.
Self-cured resin requires heating to initiate the curing process.
False (B)
Name two types of polymerization processes mentioned.
Name two types of polymerization processes mentioned.
Condensation Polymerization, Addition Polymerization
In the process of addition polymerization, monomers combine without the formation of any __________.
In the process of addition polymerization, monomers combine without the formation of any __________.
Match the following dental resins with their curing process:
Match the following dental resins with their curing process:
Which of the following is NOT a use of dental resins?
Which of the following is NOT a use of dental resins?
Poly (methyl methacrylate) is a type of acrylic resin used in dentistry.
Poly (methyl methacrylate) is a type of acrylic resin used in dentistry.
What is a required component for addition polymerization?
What is a required component for addition polymerization?
Condensation polymerization is also known as __________ growth polymerization.
Condensation polymerization is also known as __________ growth polymerization.
Match the types of dental resins with their characteristics:
Match the types of dental resins with their characteristics:
Which of the following materials can be categorized as synthetic resin?
Which of the following materials can be categorized as synthetic resin?
Thermoset resins can be reshaped by applying heat.
Thermoset resins can be reshaped by applying heat.
What is polymerization?
What is polymerization?
A polymer composed of two or more different monomers is called a __________.
A polymer composed of two or more different monomers is called a __________.
Match the following terms to their definitions:
Match the following terms to their definitions:
Which of the following is NOT a use of synthetic resin?
Which of the following is NOT a use of synthetic resin?
Thermoplastic materials become liquid when heated.
Thermoplastic materials become liquid when heated.
What type of polymer is formed from a network structure?
What type of polymer is formed from a network structure?
Synthetic resins can be used for __________, temporary sealers, and orthodontic appliances.
Synthetic resins can be used for __________, temporary sealers, and orthodontic appliances.
What is one characteristic of thermoset resins?
What is one characteristic of thermoset resins?
What is the duration for the dough to be moldable according to ADA SPEC.#12?
What is the duration for the dough to be moldable according to ADA SPEC.#12?
The stiff stage indicates that the dough can still be packed into the mold space.
The stiff stage indicates that the dough can still be packed into the mold space.
What is the purpose of placing a polyethylene sheet over the resin during the trial closure?
What is the purpose of placing a polyethylene sheet over the resin during the trial closure?
The assembly is kept in a water bath for __________ hours during the rapid curing process.
The assembly is kept in a water bath for __________ hours during the rapid curing process.
Match the stages of the curing process with their respective descriptions:
Match the stages of the curing process with their respective descriptions:
During which stage does the dough become completely hardened?
During which stage does the dough become completely hardened?
What is the function of dibutyl phthalate in synthetic fiber applications?
What is the function of dibutyl phthalate in synthetic fiber applications?
Poly (methyl methacrylate) discolors in UV light.
Poly (methyl methacrylate) discolors in UV light.
What is the role of hydroquinone in the components of liquid monomer?
What is the role of hydroquinone in the components of liquid monomer?
The __________ stage is when the resin is packed.
The __________ stage is when the resin is packed.
Match the following types of acrylic resin with their descriptions:
Match the following types of acrylic resin with their descriptions:
Which material is used to prevent cohesion of beads or pearls during storage?
Which material is used to prevent cohesion of beads or pearls during storage?
Organic amines act as accelerators to decompose peroxide at high temperatures.
Organic amines act as accelerators to decompose peroxide at high temperatures.
What is the main purpose of the double-pressing technique in denture base construction?
What is the main purpose of the double-pressing technique in denture base construction?
_____ is used as a cross-linking agent to resist surface cracks in acrylic resin.
_____ is used as a cross-linking agent to resist surface cracks in acrylic resin.
Which monomer is commonly used in the components of liquid for acrylic resin?
Which monomer is commonly used in the components of liquid for acrylic resin?
What is the boiling point of the highly volatile resin mentioned?
What is the boiling point of the highly volatile resin mentioned?
The steps in denture base construction include trimming and polishing.
The steps in denture base construction include trimming and polishing.
What are the two techniques for packing resin into the mold space?
What are the two techniques for packing resin into the mold space?
The polymer-to-monomer ratio by weight is ______.
The polymer-to-monomer ratio by weight is ______.
Match the steps in denture base construction with the correct process:
Match the steps in denture base construction with the correct process:
During the investment, what is used to ensure retention at the base of the master cast?
During the investment, what is used to ensure retention at the base of the master cast?
The metal flask used in the investing process consists of three parts.
The metal flask used in the investing process consists of three parts.
What is the purpose of applying colorgard while packing resin?
What is the purpose of applying colorgard while packing resin?
To soften the wax, place the assembly in _____.
To soften the wax, place the assembly in _____.
How long should the wax assembly be soaked in boiling water?
How long should the wax assembly be soaked in boiling water?
Study Notes
Heat-Cured Resin
- Heat-cured resin needs heat to start the curing process.
Polymerization Processes
- Addition polymerization monomers combine without forming byproducts.
- Condensation polymerization monomers combine, releasing small molecules like water.
Dental Resins and Curing Processes
- Heat-cured resin uses heat for curing.
- Self-cured resin cures at room temperature.
- Light-cured resin uses UV light for curing.
Uses of Dental Resins
- Dental resins are NOT used for dental implants.
- Poly (methyl methacrylate) acrylic resin is used in dentistry for dentures, crowns, and fillings.
Requirements for Addition Polymerization
- Initiator molecule is needed for addition polymerization.
Condensation Polymerization
- Condensation polymerization is also known as step-growth polymerization.
Types of Dental Resins and Characteristics
- Heat-cured resin has good strength and durability.
- Self-cured resin cures quickly but may have lower strength.
- Light-cured resin is used for fillings due to its ease of application and control.
Synthetic Resins
- Synthetic resin can be categorized as a thermoplastic or thermoset material.
- Thermoset resin cannot be reshaped by applying heat.
Polymerization Definition
- Polymerization is the process of joining monomers to form long chains called polymers.
Polymer Types
- Copolymers are polymers made of two or more different monomers.
Terms and Definitions
- Monomer is a small molecule that can join with other monomers to form a polymer.
- Polymer is a large molecule made up of repeating units called monomers.
Uses of Synthetic Resin
- Synthetic resin is NOT used for construction materials.
- Synthetic resins are used for dentures, temporary sealers, and orthodontic appliances.
Thermoset Resin Characteristics
- Thermoset resins permanently harden and cannot be reshaped.
ADA SPEC.#12 for Dental Resin
- Dough needs to be moldable for 1.5 hours according to ADA SPEC.#12.
Curing Stages and Techniques
Stiff Stage
- Stiff stage allows the dough to be packed into the mold space.
Polyethylene Sheet
- Polyethylene sheet is used over the resin during the trial closure to prevent sticking to the mold.
Rapid Curing Process
- Rapid curing process involves soaking the assembly in a water bath for 8 hours.
Curing Stages
- Dough stage is when the resin is mixed and is moldable.
- Stiff stage is when the resin can be packed into the mold.
- Hard stage is when the resin is fully cured and hardened.
Dibutyl Phthalate
- Dibutyl phthalate is used in synthetic fiber applications to make the fibers soft and pliable.
Poly (methyl methacrylate) Discoloration
- Poly (methyl methacrylate) can discolor in UV light.
Hydroquinone in Liquid Monomer
- Hydroquinone is used in liquid monomer to inhibit polymerization during storage.
Packing Stage
- Packing stage is when the resin is packed into the mold.
Acrylic Resin Types
- Heat-cured acrylic resin is processed using heat.
- Self-cured acrylic resin is processed at room temperature.
- Light-cured acrylic resin is processed using UV light.
Cohesion Prevention
- Silicone oil is used to prevent cohesion of beads or pearls during storage.
Organic Amines
- Organic amines act as accelerators to decompose peroxide at high temperatures.
Double-Pressing Technique
- Double-pressing technique in denture base construction is used to improve the fit and accuracy of the denture.
Cross-linking Agent
- Methyl methacrylate is used as a cross-linking agent to resist surface cracks in acrylic resin.
Liquid Monomer Component
- Methyl methacrylate is commonly used in the components of liquid for acrylic resin.
Volatile Resin Boiling Point
- Methyl methacrylate is a highly volatile resin with a boiling point of 100.5°C.
Denture Base Construction Steps
- Denture base construction includes trimming and polishing.
Packing Resin Techniques
- Hand packing and injection molding are two techniques for packing resin into the mold space.
Polymer-to-Monomer Ratio
- The polymer-to-monomer ratio by weight is 3:1.
Denture Base Construction Steps
- Investing involves placing the master cast in a flask with investment material.
- Packing involves filling the flask with resin dough.
- Curing involves hardening the resin through controlled heat application.
Retention in Investing
- Retention in the base of the master cast during investing is ensured using a retention groove.
Metal Flask Components
- The metal flask used in the investing process consists of three parts: bottom, ring, and lid.
Colorgard Application
- Colorgard is applied while packing resin to improve the aesthetic appearance of the denture.
Wax Assembly Softening
- Boiling water is used to soften the wax assembly.
Wax Assembly Soaking Time
- The wax assembly should be soaked in boiling water for 10 minutes.
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Description
This quiz explores key concepts related to dental resins, including their curing processes and types of polymerization. Test your knowledge on the characteristics, uses, and definitions associated with various resins in dentistry. Perfect for dental students and professionals!
