Dental Prosthesis: Direct Retainers and Attachments
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Questions and Answers

What is the function of a direct retainer in a removable dental prosthesis?

  • To engage the tissue to resist displacement of the prosthesis from the abutment tooth
  • To engage an abutment tooth to resist displacement of the prosthesis away from tissue (correct)
  • To provide aesthetic enhancement to the dental prosthesis
  • To stabilize the denture framework
  • How is a direct retainer generally classified?

  • Attachment and Clasps (correct)
  • Retraction and Stabilization
  • Implant and Tooth-supported
  • Temporary and Permanent
  • What is the function of a patrix in an attachment for a removable dental prosthesis?

  • Attached to the denture framework and provides stability
  • Provides aesthetic enhancement to the denture framework
  • Consists of a metal receptacle for the keyway
  • Attached to the implant/tooth and provides retention (correct)
  • What type of attachment allows rotational movement between its parts?

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

    What is the purpose of using semi-precision attachment types?

    <p>To come as wax or plastic pattern to be cast in a lab</p> Signup and view all the answers

    Attachments for removable dental prostheses are generally classified into three categories: precision, semi-precision, and non-precision.

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

    Frictional, mechanical, and magnetic attachments are examples of the types of retention that may come from attachments for removable dental prostheses.

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

    Resilient attachment types allow rotational movement between their parts and are used in tooth-tissue supported prosthesis.

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

    Rigid attachment types induce less torque on abutments and are used with a few implant numbers.

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

    Precision attachment types come as wax or plastic patterns to be cast in a lab and are ready-made in metal.

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

    Study Notes

    Direct Retainers in Removable Dental Prosthesis

    • Direct retainers are essential components that help secure removable dental prostheses in place, preventing movement during function.
    • They are generally classified into two main types:
      • Clasp assemblies that encircle the abutment tooth
      • Attachments that connect a prosthetic component to an abutment through differing mechanisms

    Patrix Function in Attachments

    • A patrix serves as a part of an attachment mechanism between removable dental prostheses and the abutment, allowing for stability and proper alignment.

    Types of Attachments and Movement

    • Attachments can facilitate different types of movement; resilient attachment types specifically allow for rotational movement, aiding in tooth-tissue supported prostheses.
    • Rigid attachment types reduce torque on abutments, making them suitable for prostheses supported by a limited number of implants.

    Purpose of Semi-Precision Attachments

    • Semi-precision attachment types provide a balance between resilience and rigidity, ensuring a more adaptable and retentive fit for removable dental prostheses.

    Classification of Attachments

    • Attachments for removable dental prostheses fall into three broad categories:
      • Precision
      • Semi-precision
      • Non-precision
    • Each category offers varying levels of stability and retention.

    Types of Retention Offered by Attachments

    • Various retention methods provided by attachments include frictional, mechanical, and magnetic retention mechanisms.

    Attributes of Precision Attachments

    • Precision attachment types are available as wax or plastic patterns, allowing them to be cast in a laboratory setting prior to becoming ready-made in metal.

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    Description

    Test your knowledge of dental prosthesis direct retainers and attachments with this quiz. Learn about the definitions and classifications of direct retainers in removable dental prosthesis.

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