AFO: Metal and Metal-Plastic Designs Features
10 Questions
3 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the main disadvantage of the Easy shoe interchangeability?

  • Limits ankle motion
  • Requires larger shoes
  • Expensive
  • More skill and time required for fabrication of proper insert (correct)

    • Which type of ankle stop allows any predetermined range of motion?

  • Mediolateral stop
  • Dorsiflexion stop (correct)
  • Plantarflexion stop
  • Ankle Joint Assist

    • What is the function of the Springwire Dorsiflexion Assist?

  • Facilitates dorsiflexion using spring wire uprights (correct)
  • Controls mediolateral movement
  • Controls plantarflexion only
  • Limits ankle motion

    • Which feature is characteristic of the VAPC orthosis from the Veterans Administration Prosthetics Center?

    <p>Clasp type with resilient single posterior upright</p> Signup and view all the answers

    Why is the VAPC orthosis contraindicated for severe spasticity, paralysis, or joint stability?

    <p>Does not offer sufficient mediolateral control</p> Signup and view all the answers

    What is the function of a split stirrup in metal and metal-plastic AFO designs?

    <p>Allows for shoe interchangeability and accurate congruence between mechanical and anatomical joints</p> Signup and view all the answers

    What distinguishes a caliper attachment from a stirrup attachment in metal and metal-plastic AFO designs?

    <p>Caliper attachment involves a round tube in the heel, while stirrup attachment involves steel material riveted to the shoe shank</p> Signup and view all the answers

    Which component in metal and metal-plastic AFO designs is responsible for providing maximum control and support of the foot?

    <p>Shoe insert</p> Signup and view all the answers

    What disadvantage is associated with a caliper attachment in metal and metal-plastic AFO designs?

    <p>Causes malalignment upon dorsiflexion/plantarflexion due to distal location of the pivot joint</p> Signup and view all the answers

    How does a shoe insert differ from a split stirrup in metal and metal-plastic AFO designs?

    <p>Shoe insert is shaped to fit the patient’s foot contour, while split stirrup can be split distally with arms sliding into a plate</p> Signup and view all the answers

    Study Notes

    Metal and Metal-Plastic Designs Features

    • Two metal uprights with proximal ends connected to a leather-covered metal or plastic calf band
    • Distal ends form the proximal part of the ankle-joints mechanism
    • The shoe or foot attachment completes the mechanical ankle joint

    Shoe or Foot Attachments

    • Stirrup: steel material riveted to the shank of the shoe, encompassing the shoe like a U

    • Split Stirrup: can be split distally with each arm sliding into a channel in a plate riveted to the sole of the shoe

    • Advantages of Split Stirrup: permits shoe interchangeability, enables more accurate congruence between the mechanical and anatomical joints

    • Disadvantages of Split Stirrup: heavier, less durable

    • Caliper: round tube placed in the heel of the shoe, receiving the caliper

    • Pivot joint is at the level of the heel, distal to the anatomical ankle joint

    • Function: allows easy shoe interchangeability

    • Advantages: light and economical

    • Disadvantage: malalignment upon dorsiflexion/plantarflexion

    • Shoe Insert: plastic material shaped to the contour of the patient's foot, which fits into the shoe

    • Functions: provides maximum control and support of the foot

    • Advantages: easy accurate fitting, easy shoe interchangeability

    • Disadvantages: more skill and time requirement for fabrication, expensive, requires larger shoes

    Ankle Joints and Controls

    • Ankle Stops: allow any predetermined range of motion, control or assist dorsiflexion and plantarflexion

    • Types: dorsiflexion stop, plantarflexion stop

    • Ankle Joint Assists: aid in ankle motions in the form of springs

    • Types:

      • Dorsiflexion Assist: compression of spring after heel strike to control plantar flexion, recoil of spring aids dorsiflexion in swing phase
      • Dorsiflexion-Plantarflexion Assist: utilizes anterior and posterior springs
      • Springwire Dorsiflexion Assist: exerts its force by the recoil of the spring wire uprights and shoe attachment
        • Advantages: lightweight, easy adjustability, adequate cosmesis
        • Disadvantage: absence of mediolateral control
      • VAPC (Veterans Administration Prosthetics Center): clasp type orthosis with resilient single posterior metal or plastic upright
        • Features: resilient single posterior metal or plastic upright, distal end of the upright terminates in a metal clasp that grips the shoe counter, upper end passes through the sliding attachment in the calf cuff
        • Function: provides dorsiflexion assistance
        • Advantage: provides more normal function
        • Disadvantage: contraindicated for severe spasticity, paralysis, or joint stability

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    Learn about the features of metal and metal-plastic designs including components like metal uprights, ankle-joint mechanisms, and shoe attachments. Understand how these components work together to create a stable structure for foot support and mobility.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser