or-pr 156 task 6 replace a broken upright on a metal afo

OR-PR 156 Task 6

Replace a Broken Upright on a Metal AFO

Introduction

Repairs to existing orthoses are common and an important skill for a technician to possess

A common repair involves the replacement of a broken upright on a metal AFO

Objectives Remove existing

broken upright Straighten out orthosis

if necessary Shape new upright to

match existing one Attach new upright Restore cuff/closure

and re-align

Removing Broken Upright Adjust a joint

spacer fixture to the width of the ankle joints (X) while the orthosis is still attached to the stirrup

X

Removing Broken Upright Adjust a joint

spacer fixture to the width of the ankle joints (X) while the orthosis is still attached to the stirrup

Set the fixture aside for later use

X

X

Removing Broken Upright Remove the

orthosis from the stirrup

Removing Broken Upright Remove the

orthosis from the stirrup

Remove the calf cuff and preserve for later reattachment

Removing Broken Upright Remove the

orthosis from the stirrup

Remove the calf cuff and preserve for later reattachment

Reinstall the joint spacer fixture

Straightening Existing AFO Place the AFO calf

band up on the bench Lay out a horizontal

line on a sheet of paper (Line A)

Then lay out a perpendicular line on the end of the horizontal line corresponding to the unbroken side of the orthosis (Line B) Line A

Line B

Straightening Existing AFO Center the AFO ankle

joints on the horizontal line so that the proximal edge of the calf band on the unbroken side is along the vertical line

Line A

Line B

Straightening Existing AFO Center the AFO ankle

joints on the horizontal line so that the proximal edge of the calf band on the unbroken side is along the vertical line

Mark the height of the calf band on the vertical line

project a horizontal line (Line C) across the paper at this height

Line C

Straightening Existing AFO

Re-contour the unbroken upright to bring the calf band to a horizontal position along Line C

Trace the broken upright on the paper

Removing Broken Upright

Sand the surface of the broken upright to expose the rivets attaching it to the calf band. The rivet surfaces should be smooth and flat

Removing Broken Upright

Carefully center punch the rivets, producing a depression deep enough to keep a drill bit in place

Removing Broken Upright

Using a countersink bit or a drill bit 2x the diameter of the rivet drill out the countersink material down to the original rivet

Removing Broken Upright

Using a pin punch drive out the rivets to separate the band from the upright

Shaping New Upright

Take a new upright attached to an ankle joint and contour it to match the traced upright line

Attaching New Upright

Now install the new ankle joint-upright on the joint spacer fixture

Attaching New Upright

Continue to refine the shape of the new upright until it matches up with the calf band properly

Attaching New Upright

Rivet the new upright on the calf band

Remove the joint spacer and reinstall the calf cuff on the calf band

Reassembling the AFO

Rivet the new upright on the calf band

Remove the joint spacer and reinstall the calf cuff on the calf band

Reattach the orthosis to the stirrup and align as needed