Podcast
Questions and Answers
Which type of dental material is considered the weakest and least expensive?
Which type of dental material is considered the weakest and least expensive?
What is the primary use of Type III Dental Stone?
What is the primary use of Type III Dental Stone?
Which type of dental stone is known for its high strength and reduced surface area?
Which type of dental stone is known for its high strength and reduced surface area?
What distinguishes Type V Dental Stone from Type IV Dental Stone?
What distinguishes Type V Dental Stone from Type IV Dental Stone?
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In which application is Type II Dental Plaster primarily utilized?
In which application is Type II Dental Plaster primarily utilized?
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What is seen as force over area, while deformation is over length?
What is seen as force over area, while deformation is over length?
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What is the average biting force for bicuspids?
What is the average biting force for bicuspids?
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In what year did G.V. Black introduce an acceptable amalgam formula?
In what year did G.V. Black introduce an acceptable amalgam formula?
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What is known as the ability of a material to sustain permanent deformation without rupture under compression?
What is known as the ability of a material to sustain permanent deformation without rupture under compression?
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What is the Knoop hardness number for dentin?
What is the Knoop hardness number for dentin?
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Which one of the following is not a mechanical property related to plasticity?
Which one of the following is not a mechanical property related to plasticity?
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What term describes a liquid that becomes less viscous and more fluid under repeated applications of pressure?
What term describes a liquid that becomes less viscous and more fluid under repeated applications of pressure?
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What is the maximum stress a material can withstand without permanent deformation known as?
What is the maximum stress a material can withstand without permanent deformation known as?
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What primarily causes electrochemical corrosion to occur under food debris on a metallic restoration?
What primarily causes electrochemical corrosion to occur under food debris on a metallic restoration?
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Which theory describes the transition of hemihydrate powder from a solution to a gel state?
Which theory describes the transition of hemihydrate powder from a solution to a gel state?
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Which factor does NOT affect good bonding?
Which factor does NOT affect good bonding?
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What role do thermal stresses play in bonding?
What role do thermal stresses play in bonding?
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How do hydrogen bonds contribute to gypsum setting according to the hydration theory?
How do hydrogen bonds contribute to gypsum setting according to the hydration theory?
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What is a consequence of shrinkage in liquid adhesives?
What is a consequence of shrinkage in liquid adhesives?
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Which of the following is a key aspect of the dissolution precipitation theory?
Which of the following is a key aspect of the dissolution precipitation theory?
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Which factor leads to deterioration of an adhesive bond?
Which factor leads to deterioration of an adhesive bond?
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What is the elastic limit in a material referred to as?
What is the elastic limit in a material referred to as?
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What type of stress is characterized by parallel forces not acting along the same axis?
What type of stress is characterized by parallel forces not acting along the same axis?
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Which tests are used to measure the microhardness of materials?
Which tests are used to measure the microhardness of materials?
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Which of the following is NOT a method for adhesive bonding?
Which of the following is NOT a method for adhesive bonding?
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Which property is essential for an ideal restorative material?
Which property is essential for an ideal restorative material?
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What type of corrosion occurs due to dissimilar metals in contact?
What type of corrosion occurs due to dissimilar metals in contact?
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Which type of corrosion results from variations in electrolyte concentration?
Which type of corrosion results from variations in electrolyte concentration?
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What is a characteristic of stress corrosion?
What is a characteristic of stress corrosion?
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What challenges does dentin present for adhesive bonding?
What challenges does dentin present for adhesive bonding?
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What is the purpose of preventative dental materials?
What is the purpose of preventative dental materials?
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Which type of dental material is used to repair or replace tooth structure directly within the oral cavity?
Which type of dental material is used to repair or replace tooth structure directly within the oral cavity?
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What is an example of a temporary restorative dental material?
What is an example of a temporary restorative dental material?
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What characterizes the smear layer on cut dentin surfaces?
What characterizes the smear layer on cut dentin surfaces?
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What type of gypsum product is identified as impression plaster?
What type of gypsum product is identified as impression plaster?
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What best describes auxiliary dental materials?
What best describes auxiliary dental materials?
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What is a significant effect of acid etching on dentin?
What is a significant effect of acid etching on dentin?
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Study Notes
Dental Materials (MCQs) - Test 1
- Stress vs. Strain: Stress is force over area, while strain is deformation over length.
- Bicuspid Biting Force: Average biting force for bicuspids is 222-445 to 400-890 N. (133-334 to 250-450 N)
- Amalgam Formula: G.V. Black introduced an acceptable amalgam formula in 1895.
- Material Ability: The ability of a material to withstand permanent compression without rupture is known as ductility.
- Dentin Hardness: Knoop hardness number for dentin is 100.
- Adhesion Factors: Factors affecting adhesion include interpenetration, wettability, macro-mechanical interlocking but not viscosity.
- Gypsum Accelerator: Sodium sulfate is a gypsum accelerator.
- Light Beam Interactions: When a beam of light strikes an object, transmission, scattering, dispersion, and absorption can occur.
Dental Materials - Additional Concepts
- Maximum Stress: The maximum stress before permanent deformation is known as the elastic limit.
- Liquid Viscosity: A liquid that becomes less viscous with repeated pressure application is called thixotropic.
- Mechanical Properties: Mechanical properties related to plasticity include ductility, and percent elongation, but not elastic modulus.
- Synthetic Polymers: Bakelite, Perspex, and Nylon are examples of synthetic polymers. (Polystyrene is not listed as an example)
- Color Saturation: The strength of color or the degree of saturation of color is known as chroma.
- Thermal Disturbance: A measure of how quickly temperature disturbance travels through a body is called thermal diffusivity.
- Stress Deformation: Slow stress deformation under a constant load is called creep.
- First ADA Acceptance Seal: The first ADA seal of acceptance was used in 1931.
- Elastic Limit Definition: The elastic limit is the same as the yield point of a material.
- Shear Forces: Shear is a result of parallel but non-linear forces.
Dental Materials - Additional Concepts (Part B)
- Ideal Restorative Material Properties: Ideal restorative materials are biocompatible, bond permanently to the tooth structure, match natural tooth appearance, and initiate repair processes. These are important criteria for ideal restorative treatment choices.
- Electrochemical Corrosion: Galvanic corrosion occurs with combinations of metals, while concentration cell corrosion has differing electrolyte concentrations. Stress corrosion occurs due to fatigue from repeated loading.
- Gypsum Setting Theories: Setting of gypsum materials is explained by colloidal theory, hydration theory, and dissolution-precipitation theory.
- Adhesive Bonding Factors: Factors influencing good adhesive bonding are clean surfaces, substance penetration, chemical reactions (surface contact), shrinkage reduction and prevention and thermal stress stability.
- Dentin Challenges with Adhesion: Dentin presents challenges in adhesive bonding due to its living tissue nature, tubular structure, presence of the smear layer, and dentinal fluid.
- Dental Material Classification: Dental materials are broadly classified as preventative, restorative, auxiliary and temporary.
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Description
Test your knowledge on dental materials with this quiz focusing on stress, strain, and various properties of dental materials. Topics include biting forces, amalgam formulas, and adhesion factors. Perfect for students or professionals in dental sciences.
