Questions and Answers
The pH of saliva is always acidic.
False
Dental materials are used in medicine.
False
Ceramics are a type of polymer.
False
The oral environment is characterized by a constant temperature.
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An ideal dental material should be resistant to corrosion.
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The Greek word 'poly' means 'one'.
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Composites are a mixture of three or more classes of materials.
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Dental implants are a type of endodontic material.
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The study of composition and properties of dental materials is a subfield of medicine.
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Dental materials are fabricated to be used in both dentistry and medicine.
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The oral environment is characterized by a constant pH.
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An ideal dental material should be biocompatible and toxic.
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The Greek word 'meros' means 'one'.
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Composites are a mixture of one or more classes of materials.
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Dental restorations include crowns and bridges.
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Temperature fluctuations in the oral environment can range from 0°C to 100°C.
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Study Notes
Definition and Scope of Dental Materials
- Dental materials are specially fabricated materials designed for use in dentistry.
- The science of dental materials involves studying composition, properties, and environmental interactions.
Characteristics of Oral Environment
- Oral environment is characterized by:
- Wet conditions (saliva, food, and drinks)
- Temperature fluctuations (ice cream to coffee/tea)
- pH variations (neutral to acidic/alkaline)
- Masticatory forces variation
Ideal Dental Materials
- Biocompatibility and safety (nontoxic, non-irritating, non-allergic)
- Mechanically stable and durable (withstands biting and chewing forces)
- Dimensionally stable (minimally affected by temperature or solvents)
- Easy manipulation (easy use with no special equipment)
- Tasteless and odorless
- Cleanable (can be maintained)
- Resistant to corrosion or chemicals (does not deteriorate over time)
- Cost-effective (within patient's budget)
Classification of Materials Used in Dentistry
- Based on chemical composition, there are four classes of materials:
- Polymers
- Metals
- Ceramics
- Composites (mixture of two or more of the above classes)
Polymers
- Polymers are macromolecules built up by linking together smaller molecules (monomers)
- Process of linking repeating units (monomers) is termed polymerization
- Examples: polymer molecules formed from monomers through polymerization
Definition and Scope of Dental Materials
- Dental materials are specially fabricated materials designed for use in dentistry.
- The science of dental materials involves studying composition, properties, and environmental interactions.
Characteristics of Oral Environment
- Oral environment is characterized by:
- Wet conditions (saliva, food, and drinks)
- Temperature fluctuations (ice cream to coffee/tea)
- pH variations (neutral to acidic/alkaline)
- Masticatory forces variation
Ideal Dental Materials
- Biocompatibility and safety (nontoxic, non-irritating, non-allergic)
- Mechanically stable and durable (withstands biting and chewing forces)
- Dimensionally stable (minimally affected by temperature or solvents)
- Easy manipulation (easy use with no special equipment)
- Tasteless and odorless
- Cleanable (can be maintained)
- Resistant to corrosion or chemicals (does not deteriorate over time)
- Cost-effective (within patient's budget)
Classification of Materials Used in Dentistry
- Based on chemical composition, there are four classes of materials:
- Polymers
- Metals
- Ceramics
- Composites (mixture of two or more of the above classes)
Polymers
- Polymers are macromolecules built up by linking together smaller molecules (monomers)
- Process of linking repeating units (monomers) is termed polymerization
- Examples: polymer molecules formed from monomers through polymerization
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