50 Questions
What is the primary reason for using a powder/liquid system in heat-cured resin?
To decrease polymerization shrinkage
What is the monomer used in the formation of polymethylmethacrylate (PMMA)?
Methylmethacrylate (MMA)
Why are acrylic resin dentures of natural appearance?
Due to their ability to mimic natural tooth color and texture
What is an advantage of acrylic resin dentures in terms of density?
They have low density
What is the process by which acrylic resin is formed?
Free radical addition polymerization
What is the primary advantage of light-activated acrylic resin?
It is a newer alternative to heat-cured and cold-cured resins
Why are acrylic resin dentures easy to repair?
Due to their ability to be easily manipulated and processed
What is the primary advantage of acrylic resin in terms of cost?
It is less expensive
What is the reason for acrylic resin being the most popular denture base material?
It meets many of the required criteria for an ideal denture base material
What is the characteristic of acrylic resin that helps maintain healthy tissues?
Good thermal conductivity
What is the primary purpose of good thermal conductivity in denture base materials?
To maintain healthy tissues
What is the advantage of a low-density denture base material?
Better retention of the denture
What is the purpose of the powder/liquid system in heat-cured resin?
To decrease polymerization shrinkage
What is the property of acrylic resin that allows it to reproduce surface details?
Dimensional stability
What is the benefit of a denture base material being radio-opaque?
It enables the denture to be seen in x-ray if swallowed
What is the process of forming polymethylmethacrylate (PMMA) from methylmethacrylate (MMA)?
Free radical addition polymerization
What is the primary advantage of cold-cured resin over heat-cured resin?
It is easier to process
What is the characteristic of an ideal denture base material that enables it to maintain its shape and size?
Dimensional stability
Why are acrylic resin dentures less likely to cause tissue irritation?
They are absence of odor, taste or toxic products
What is the primary advantage of acrylic resin dentures in terms of manipulation?
They are easy to process
What is the primary reason for the requirement of high mechanical properties in an ideal denture base material?
To withstand chewing forces
What is the benefit of a denture base material being dimensionally stable?
It maintains its shape and size
What is the primary advantage of acrylic resin dentures in terms of retention?
Good retention to other polymers, porcelain and metals
What is the purpose of the absence of odor, taste or toxic products in an ideal denture base material?
To prevent tissue irritation
What is the primary advantage of heat-cured resin over cold-cured resin?
Improved mechanical properties
What is the primary benefit of a denture base material being inexpensive?
It makes dentures more accessible to patients
What is the primary advantage of acrylic resin dentures in terms of shelf life?
Long-lasting
What is the primary purpose of good retention to other polymers, porcelain and metals in an ideal denture base material?
To ensure proper fit and function
What is the primary benefit of a denture base material being radio-opaque?
It enables identification of the denture in an x-ray
What is the primary advantage of acrylic resin dentures in terms of processing?
Easy to process
What property of an ideal denture base material helps maintain healthy tissues?
Good thermal conductivity
What is the primary advantage of a denture base material being low in density?
Helps denture retention
What is the primary reason for using acrylic resin in dentures?
It meets many of the required criteria of an ideal denture base material
What is the characteristic of an ideal denture base material that prevents it from being swallowed and causing harm?
Radio-opaque
What is the process of forming polymethylmethacrylate (PMMA) from methylmethacrylate (MMA)?
Free radical addition polymerization
What is the primary advantage of a denture base material being dimensionally stable?
It maintains its shape and size
What is the characteristic of acrylic resin that allows it to be easily processed and repaired?
Easy to manipulate and repair
What is the primary benefit of a denture base material being inexpensive?
It makes dentures more accessible to patients
What is the purpose of good retention to other polymers, porcelain, and metals in an ideal denture base material?
To ensure a strong bond and proper fit
What is the primary advantage of light-activated acrylic resin over other types of acrylic resin?
It provides an alternative method of curing
What is the primary advantage of an ideal denture base material having a natural appearance?
To provide a natural look and feel for the patient.
Why is it important for an ideal denture base material to have good thermal conductivity?
To maintain healthy tissues.
What is the benefit of using acrylic resin in dentures?
It meets many of the required criteria for an ideal denture base material.
What is the purpose of a denture base material being radio-opaque?
To be visible in an x-ray if swallowed.
What is the advantage of a denture base material having a high proportional limit?
It provides high mechanical properties and resistance to deformation.
Why is it important for a denture base material to have good retention to other polymers, porcelain, and metals?
To ensure a strong bond and stability of the denture.
What is the benefit of a denture base material having a low density?
It helps with denture retention.
What is the primary purpose of a denture base material being easy to manipulate?
To facilitate easy processing and repair.
What is the importance of a denture base material being dimensionally stable?
To maintain its shape and size over time.
What is the benefit of a denture base material having good shelf life?
It allows for longer storage and use.
Study Notes
Criteria of Ideal Denture Base Material
- Natural appearance
- High mechanical properties (proportional limit, ultimate strength, impact strength, fatigue strength), stiffness, and hardness
- Good thermal conductivity to maintain healthy tissues
- Low density to help denture retention
- Dimensionally stable and reproduce surface details
- Absence of odor, taste, or toxic products
- Good retention to other polymers, porcelain, and metals
- Radio-opaque to be seen in x-ray if swallowed
- Easy to repair
- Easy to manipulate
- Good shelf life
- Inexpensive
Acrylic Resins
- Meet many of the required criteria
- Natural appearance
- Low density
- Easy to process
- Inexpensive
- Easy to repair
Composition of Acrylic Resin
- Made by free radical addition polymerization to form polymethylmethacrylate (PMMA)
- Monomer is methylmethacreylate (MMA)
- Available in heat cured, cold cured, or light activated forms
Heat-Cured Resin
- Consist of a powder and a liquid
- Mixing and subsequent heating form a rigid solid
- Powder/liquid system to decrease polymerization shrinkage and process by the dough technique
Test your knowledge of the essential characteristics of an ideal denture base material, including its mechanical properties, thermal conductivity, and more. How well do you understand the criteria for a perfect denture base material? Take this quiz to find out!
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