Bending BWS primer

Learning to Bend wire

Purpose: To give you the skills and confidence

to make and use the Farrell Bent Wire

System

1) Unbend a paper clip...by hand

Unbend clip by plier

•Walk the plier around the curve to get a straight line

Extra-credit....re-bend the clip

(If you can do this, you’ll have all the plier skills you’ll need...)

Small Bends•Bend around the Round Beak•90o bend

Round Beak

Square Beak

Small Bends•Keep the second bend “on plane” (flat on the paper)

Small Bends•Do three more 90o bends, all on plane

Medium Bends•Use the second step of the loop forming plier, or the middle of the bird beak plier•180o bend, this time

Large Bends•Use the thickest part of the loop forming plier or the bottom of the bird beak•Alternate: Small 90o, Large 180o

Bend an Arch Form•Hollow Chop•“Spin” it

BWS loop•How many bends does this loop have?•What size are the bends?

Answer: Four

Small(90)Small(90) Medium(180)Large (180)

BWS Loop1)Make a small bend to 90 degrees 2)Make a Large bend 180 degrees. Keep the wire flat. 3)Make a small bend 90 degrees. Still flat.4)Make a Medium bend 180 degrees. 5)Voila! Your first BWS loop.

Supply Tray

Model (with

Bands)

Pencil, Marker Bird Beak

Heavy Wire Cutter

.028 SS wire

Using a Template•Creating a flat paper template•Good for learning•Easier to use than the model

Visualize the contact points

Mark points of contact

Mark loop locations

Put marked model on the photocopier

Cover with cloth or paper towel

Photocopy

Connect the lines

Keep the model nearby for reference

Start in the midline

Follow the lines...

...keeping the wire flat.

A little overbent, so...

...so correct it.

Follow along the line

Perfect all around

Take it to the model

Bending an “Ideal” BWS

•Not adapted to the rotations•Has an “ideal” (smooth) arch form

Mark points of contact

Mark loop locations

Visualize the contact points

“Spin” the wire and adjust to the the contact points

From the side

Done

Bending an“Adapted” BWS

•Follows the contours of the rotated teeth•Contacts surfaces

Mark the model where you want contact

Start bending from the midline, work right, then left

Make sure it lies passively

Go to the other side

Bending the Loop

Locate point for Loops

Mark the wire

Pick up next to the mark...

...round beak toward bend

Set the angle of the loop Plane of the

BWS (occlusion)

Plane of the bend: always perp to plier Upper = 25o

Lower = 10o

Bend around the round beak

The first bend: small 90

Ready for the second bend

2nd Bend: large 180

The Second Bend

Next: Small 90

Third bend

Next: Small 180

The Fourth Bend

the Fourth Bend

Adjust loop and distal leg

Adjusting the Legs: Horizontal plane

Adjust Angle of Loop

Gingival Gingival ImpingementImpingement

Adjust angle of loop

Adjust the Legs: Vertical plane

Loop’s too high

Now tipped down

Good

Cut off extra

One last case...

Adapted BWS

Make your marks

From above...

... the photocopy

Start your bends and adjust

...work around...

...set aside for try-in.