Podcast
Questions and Answers
Why is the creep potential of dental amalgam a clinical concern?
Why is the creep potential of dental amalgam a clinical concern?
Creep can lead to dimensional changes, marginal deterioration, and potential failure of the restoration.
In what scenario would a high hardness number be a disadvantage for a dental material?
In what scenario would a high hardness number be a disadvantage for a dental material?
High hardness can cause excessive wear on the opposing dentition.
What is the primary failure mechanism of acrylic resin denture bases under cyclic loading, and how can it be mitigated?
What is the primary failure mechanism of acrylic resin denture bases under cyclic loading, and how can it be mitigated?
Fatigue fracture is the primary failure mechanism. It can be mitigated by proper denture design, material selection, and patient education on denture care.
Under what conditions might yield strength be considered more critical than ultimate strength in a dental material?
Under what conditions might yield strength be considered more critical than ultimate strength in a dental material?
Why is a sharp snap removal preferred when removing elastic impressions from a patient's mouth?
Why is a sharp snap removal preferred when removing elastic impressions from a patient's mouth?
Why is stiffness a critical property for materials used in long-span bridges?
Why is stiffness a critical property for materials used in long-span bridges?
Why is high impact strength important for denture base materials?
Why is high impact strength important for denture base materials?
Explain why the endurance limit of restorative materials should exceed masticatory stresses.
Explain why the endurance limit of restorative materials should exceed masticatory stresses.
Why should the base under an amalgam restoration be stiff?
Why should the base under an amalgam restoration be stiff?
What are the potential consequences of opposing natural teeth with porcelain teeth in a restoration?
What are the potential consequences of opposing natural teeth with porcelain teeth in a restoration?
How does the thermal conductivity of a dental material influence its suitability for use near the pulp?
How does the thermal conductivity of a dental material influence its suitability for use near the pulp?
Describe the difference between tarnish and corrosion in the context of dental materials.
Describe the difference between tarnish and corrosion in the context of dental materials.
Why is it important to consider the water sorption of a dental resin composite?
Why is it important to consider the water sorption of a dental resin composite?
What is the role of silane coupling agents in composite restorations?
What is the role of silane coupling agents in composite restorations?
How does the coefficient of thermal expansion (CTE) mismatch between a restorative material and tooth structure affect the long-term success of a restoration?
How does the coefficient of thermal expansion (CTE) mismatch between a restorative material and tooth structure affect the long-term success of a restoration?
Explain the phenomenon of 'galvanism' in the oral cavity and its potential effects.
Explain the phenomenon of 'galvanism' in the oral cavity and its potential effects.
Why is radiopacity an important characteristic for dental materials?
Why is radiopacity an important characteristic for dental materials?
Describe the process of polymerization shrinkage in resin-based composites and strategies to minimize its effects.
Describe the process of polymerization shrinkage in resin-based composites and strategies to minimize its effects.
What is the purpose of acid etching enamel before placing a composite restoration?
What is the purpose of acid etching enamel before placing a composite restoration?
Explain why proper finishing and polishing of dental restorations are important for long-term clinical success.
Explain why proper finishing and polishing of dental restorations are important for long-term clinical success.
Flashcards
What is Creep?
What is Creep?
A slow, permanent deformation under constant stress.
What is Hardness?
What is Hardness?
Resistance to localized plastic deformation (indentation or scratching).
What is Yield Strength?
What is Yield Strength?
The maximum stress a material can withstand before permanent deformation occurs.
Elastic Impression Removal
Elastic Impression Removal
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Why Stiff Bridge Materials?
Why Stiff Bridge Materials?
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Denture Base Impact Strength
Denture Base Impact Strength
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Endurance Limit
Endurance Limit
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Stiff Base Under Amalgam?
Stiff Base Under Amalgam?
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Porcelain vs Natural Teeth
Porcelain vs Natural Teeth
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Study Notes
- Dental amalgam can be susceptible to creep.
- A high hardness number in a material can be both beneficial and detrimental.
- Acrylic resin denture bases can fracture under small cyclic loading.
- A material's yield strength is more critical compared to its ultimate strength.
- When removing elastic impressions from a patient's mouth, a swift, snapping action is essential.
- Stiff materials are required for constructing long-span bridges.
- Denture bases need materials with high impact strength.
- Restorative materials should have an endurance limit exceeding masticatory stresses.
- The base under amalgam should be stiff.
- Porcelain teeth should not oppose natural teeth.
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