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Polyether Rubber Impression Materials Overview
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Polyether Rubber Impression Materials Overview

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Questions and Answers

What is a disadvantage of polyether impression materials?

  • Long working time and high flexibility
  • Short working time and high stiffness (correct)
  • Short working time and low fluidity
  • Long working time and low stiffness

    • What advantage do polyether impressions offer over polysulfides?

  • Easier availability
  • Better mechanical properties (correct)
  • Higher flexibility
  • Lower cost

    • What is a notable characteristic of polyether impression materials related to wetting properties?

  • High fluidity
  • High hydrophobicity
  • High stiffness
  • High hydrophilicity (correct)

    • How are polyether rubber impression materials supplied?

    <p>As two pastes</p> Signup and view all the answers

    What is the base composition of polyether impression materials?

    <p>80% low M.W. polyether liquid polymer and 20% Fillers as silica</p> Signup and view all the answers

    What type of polymerization gives rise to polyether rubber impression materials?

    <p>Addition polymerization of Polyether (liquid polymer) + Sulfonic acid ester</p> Signup and view all the answers

    Which type of polyether consistency is meant for injection by a syringe?

    <p>Light body</p> Signup and view all the answers

    What is the dimensional change due to shrinkage during polymerization of polysulfide impressions in the first 24 hours?

    <p>0.3%</p> Signup and view all the answers

    Why are polyether impression materials better at reproducing details?

    <p>Due to their high hydrophilicity</p> Signup and view all the answers

    What makes polyether impression materials preferable to condensation silicone impressions in terms of dimensional change?

    <p>Less dimensional change</p> Signup and view all the answers

    What is a notable disadvantage of polyether impression materials?

    <p>Short working time</p> Signup and view all the answers

    Which pastes are polyether materials typically supplied as?

    <p>Two pastes</p> Signup and view all the answers

    What is the general property of rubber impression materials in terms of fluidity?

    <p>Depends on consistency</p> Signup and view all the answers

    Which component of polyether impression materials contributes to better wetting of soft tissues?

    <p>Polyether liquid polymer</p> Signup and view all the answers

    What is the main advantage that polyether impressions have over condensation silicone impression materials?

    <p>Excellent surface details</p> Signup and view all the answers

    What is the base composition of polyether impression materials?

    <p>Low M.W. polyether liquid polymer</p> Signup and view all the answers

    Which polymerization process gives rise to polyether rubber impression materials?

    <p>Addition polymerization</p> Signup and view all the answers

    What type of shrinkage is observed during the first 24 hours for condensation silicone impressions?

    <p>0.6%</p> Signup and view all the answers

    Which component contributes to the setting reaction of polyether rubber impression materials?

    <p>Sulfonic acid ester</p> Signup and view all the answers

    What consistency is the light body of polyether materials used for?

    <p>For injection by syringe</p> Signup and view all the answers

    What is a specific advantage of polyether impressions over condensation silicone impressions in terms of wetting properties?

    <p>Better wetting to soft tissues</p> Signup and view all the answers

    Which component contributes to better wetting of gypsum products when pouring the models of polyether impressions?

    <p>Low M.W. polyether liquid polymer</p> Signup and view all the answers

    What is a notable disadvantage of polyether impressions?

    <p>Short working time</p> Signup and view all the answers

    Which type of consistency in polyether materials is meant for use as a tray for the light body?

    <p>Heavy body</p> Signup and view all the answers

    What is the general property of rubber impression materials in terms of dimensional changes during polymerization?

    <p>Little shrinkage observed</p> Signup and view all the answers

    Which polymerization process gives rise to polyether rubber impression materials?

    <p>Addition polymerization</p> Signup and view all the answers

    What property of polyether impressions contributes to restorations with excellent surface details?

    <p>Hydrophilicity</p> Signup and view all the answers

    Which component is responsible for the setting reaction in polyether rubber impression materials?

    <p>Sulfonic acid ester</p> Signup and view all the answers

    Which type of shrinkage is observed during the first 24 hours for polysulfide impressions?

    <p>0.3%</p> Signup and view all the answers

    What makes polyether impressions preferable to polysulfide impressions in terms of dimensional change?

    <p>Lower shrinkage rate</p> Signup and view all the answers

    What type of shrinkage is observed during the first 24 hours for condensation silicone impressions?

    <p>0.6%</p> Signup and view all the answers

    Which component contributes to the setting reaction in polyether rubber impression materials?

    <p>Catalyst</p> Signup and view all the answers

    In polyether rubber impression materials, what is the base primarily composed of?

    <p>Low M.W. polyether liquid polymer with terminal group</p> Signup and view all the answers

    What is the purpose of the fillers in the composition of the polyether rubber impression materials?

    <p>Add strength and rigidity</p> Signup and view all the answers

    Which factor distinguishes polyether impression materials from polysulfides?

    <p>Better wetting capabilities</p> Signup and view all the answers

    What characteristic of polyether rubber impression materials is responsible for better wetting of soft tissues?

    <p>Hydrophilicity</p> Signup and view all the answers

    Which consistency of polyether materials is specifically designed for use alone in a special tray?

    <p>Medium body</p> Signup and view all the answers

    What is a notable advantage of condensation silicone impressions over polyether impressions?

    <p>Longer working time</p> Signup and view all the answers

    Which factor contributes to restorations with excellent surface details in polyether rubber impressions?

    <p>Better wetting capabilities</p> Signup and view all the answers

    What property of polyether impression materials makes them suitable for wetting gypsum products during pouring the models?

    <p>Hydrophilicity</p> Signup and view all the answers

    What is a notable disadvantage of polyether rubber impression materials?

    <p>Short working time and high stiffness</p> Signup and view all the answers

    Which component contributes to the setting reaction of polyether rubber impression materials?

    <p>Sulfonic acid ester</p> Signup and view all the answers

    What is the primary function of fillers in the composition of polyether rubber impression materials?

    <p>Increase mechanical properties</p> Signup and view all the answers

    Which consistency of polyether materials is typically used for injection by a syringe?

    <p>Light body</p> Signup and view all the answers

    What is a notable advantage of polyether impression materials over condensation silicone impressions in terms of dimensional changes during polymerization?

    <p>Lower dimensional shrinkage</p> Signup and view all the answers

    How are polyether rubber impression materials supplied for use?

    <p>As two pastes</p> Signup and view all the answers

    Which aspect distinguishes polyether impression materials from polysulfides?

    <p>Hydrophilicity</p> Signup and view all the answers

    What type of dimensional changes occur during the polymerization of polyether rubber impression materials?

    <p>Shrinkage</p> Signup and view all the answers

    What is the main component of the base composition in polyether impression materials?

    <p>Low M.W. polyether liquid polymer</p> Signup and view all the answers

    What characteristic of polyether rubber impression materials contributes to better wetting of gypsum products during model pouring?

    <p>Hydrophilicity</p> Signup and view all the answers

    What is the primary disadvantage of polyether impressions?

    <p>Short working time</p> Signup and view all the answers

    Which polymerization process is involved in the setting reaction of polyether rubber impression materials?

    <p>Addition polymerization</p> Signup and view all the answers

    What does the base of polyether impression materials primarily consist of?

    <p>Low M.W. polyether liquid polymer</p> Signup and view all the answers

    Which type of shrinkage is observed during the first 24 hours for condensation silicone impressions?

    <p>0.6%</p> Signup and view all the answers

    What do polyether impressions offer over polysulfide impressions in terms of dimensional changes during polymerization?

    <p>Less shrinkage</p> Signup and view all the answers

    What characteristic of rubber impression materials makes them suitable for use as a tray for the light body?

    <p>High stiffness</p> Signup and view all the answers

    Which component contributes to better wetting of soft tissues in polyether impression materials?

    <p>Low M.W. polyether liquid polymer</p> Signup and view all the answers

    What type of consistency is the medium of polyether materials used for?

    <p>Use in a special tray</p> Signup and view all the answers

    What property of polyether impression materials is responsible for restorations with excellent surface details?

    <p>High hydrophilicity</p> Signup and view all the answers

    Which component is involved in the setting reaction of polyether rubber impression materials?

    <p>Sulfonic acid ester</p> Signup and view all the answers

    What distinguishes polyether impressions from condensation silicone impression materials?

    <p>Less dimensional change</p> Signup and view all the answers

    Which polymerization process is involved in the setting reaction of polyether rubber impression materials?

    <p>Addition polymerization</p> Signup and view all the answers

    What characteristic of polyether rubber impression materials contributes to better wetting of soft tissues and gypsum products?

    <p>Hydrophilicity</p> Signup and view all the answers

    What type of shrinkage is observed during the first 24 hours for polysulfide impressions?

    <p>0.3%</p> Signup and view all the answers

    What property of rubber impression materials affects their fluidity?

    <p>Consistency</p> Signup and view all the answers

    Which component contributes to the setting reaction of condensation silicone impression materials?

    <p>Catalyst</p> Signup and view all the answers

    What makes polyether rubber impression materials more suitable for use in a special tray?

    <p>Low viscosity</p> Signup and view all the answers

    Why are polyether impression materials preferred over polysulfides in terms of mechanical properties?

    <p>High stiffness</p> Signup and view all the answers

    Which paste is typically involved in the setting reaction of polyether rubber impression materials?

    <p>Catalyst paste</p> Signup and view all the answers

    What does the presence of Sulfonic acid ester contribute to in polyether impression materials?

    <p>Setting reaction</p> Signup and view all the answers

    What is the primary disadvantage associated with polyether rubber impression materials?

    <p>Long working time</p> Signup and view all the answers

    Which component is responsible for the setting reaction in polyether rubber impression materials?

    <p>Catalyst</p> Signup and view all the answers

    What distinguishes polyether impression materials from condensation silicone impressions in terms of wetting properties?

    <p>High hydrophilicity</p> Signup and view all the answers

    Which type of shrinkage is observed during the first 24 hours for polysulfide impressions?

    <p>0.3%</p> Signup and view all the answers

    What property of polyether impression materials contributes to restorations with excellent surface details?

    <p>High hydrophilicity</p> Signup and view all the answers

    What is the general property of rubber impression materials in terms of fluidity?

    <p>Medium light body</p> Signup and view all the answers

    What consistency is the heavy body of polyether materials used for?

    <p>Tray for the light body</p> Signup and view all the answers

    What aspect distinguishes polyether impression materials from polysulfides regarding mechanical properties?

    <p>Low stiffness</p> Signup and view all the answers

    Why are polyether impressions better at reproducing details compared to other impression materials?

    <p>High hydrophilicity</p> Signup and view all the answers

    Which polymerization process is involved in the setting reaction of polyether rubber impression materials?

    <p>Addition polymerization</p> Signup and view all the answers

    Which polymerization process is involved in the setting reaction of polyether rubber impression materials?

    <p>Addition polymerization</p> Signup and view all the answers

    What is the primary disadvantage associated with polyether rubber impression materials?

    <p>Short working time</p> Signup and view all the answers

    What is the primary advantage that polyether impressions have over condensation silicone impression materials?

    <p>Better wetting to soft tissues</p> Signup and view all the answers

    Why are polyether impressions better at reproducing details compared to other impression materials?

    <p>Sulfonic acid ester catalyst</p> Signup and view all the answers

    What characteristic of polyether rubber impression materials contributes to better wetting of soft tissues?

    <p>Hydrophilicity</p> Signup and view all the answers

    What consistency is the heavy body of polyether materials used for?

    <p>Use as a tray for light body</p> Signup and view all the answers

    Which component contributes to better wetting of soft tissues in polyether impression materials?

    <p>Polyether liquid polymer</p> Signup and view all the answers

    What distinguishes polyether impressions from condensation silicone impression materials?

    <p>Setting reaction process</p> Signup and view all the answers

    What property of polyether impression materials contributes to restorations with excellent surface details?

    <p>Better wetting to soft tissues</p> Signup and view all the answers

    What aspect of polyether impressions is responsible for less dimensional change compared to condensation silicone impression materials?

    <p>Hydrophilicity</p> Signup and view all the answers

    What is a key advantage of polyether impressions over polysulfides?

    <p>Better wetting to soft tissues</p> Signup and view all the answers

    Which factor contributes to restorations with excellent surface details in polyether impressions?

    <p>Hydrophilicity and better wetting properties</p> Signup and view all the answers

    Which component is responsible for the setting reaction in polyether rubber impression materials?

    <p>Sulfonic acid ester</p> Signup and view all the answers

    What property of polyether impressions makes them superior in reproducing details compared to other materials?

    <p>Hydrophilicity</p> Signup and view all the answers

    Which general property of rubber impression materials influences their fluidity?

    <p>Consistency of the material</p> Signup and view all the answers

    Why do polyether impressions have better wetting to soft tissues and gypsum products?

    <p>The hydrophilicity of the material</p> Signup and view all the answers

    What type of shrinkage is observed during the first 24 hours in both polysulfide and condensation silicone impressions?

    <p>0.6%</p> Signup and view all the answers

    Which component in polyether rubber impression materials is responsible for the addition polymerization reaction leading to rubber production?

    <p>Low M.W. polyether liquid polymer</p> Signup and view all the answers

    What presents a notable disadvantage of polyether impression materials?

    <p>High stiffness</p> Signup and view all the answers

    Which property of polyether impressions contributes to their superiority in reproducing fine details?

    <p>Hydrophilicity</p> Signup and view all the answers

    Polyether rubber impression materials have a longer working time than condensation silicone impression materials.

    <p>False</p> Signup and view all the answers

    The catalyst in the composition of polyether rubber impression materials is a sulfonic acid ester.

    <p>True</p> Signup and view all the answers

    Polyether impressions are less hydrophilic than condensation silicone impression materials.

    <p>False</p> Signup and view all the answers

    Polysulfide impressions have a higher dimensional change than polyether impressions.

    <p>False</p> Signup and view all the answers

    The polyether materials for impressions are supplied as a single paste.

    <p>False</p> Signup and view all the answers

    The setting reaction of polyether rubber impression materials involves condensation polymerization.

    <p>False</p> Signup and view all the answers

    Polyether rubber impressions have a higher shrinkage during setting than condensation silicones.

    <p>False</p> Signup and view all the answers

    Rubber impression materials are supplied in different consistencies for light, medium, and heavy body applications.

    <p>True</p> Signup and view all the answers

    Condensation silicone impressions shrink more during the first 24 hours than polysulfide impressions.

    <p>True</p> Signup and view all the answers

    The base of polyether impression materials primarily consists of high molecular weight liquid polymer.

    <p>False</p> Signup and view all the answers

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