Outer boot design opinions continued
Kevin Matthews
Description
Collection
Title:
Outer boot design opinions continued
Creator:
Kevin Matthews
Date:
7/31/2007
Text:
Oops, I missed one reply. Mr. Lehneis has a very good idea for design that I feel may accomplish the same thing. My design is a little more rigid, but his may well be as effective. Thanks to all that replied.
Response...
Kevin, try making the solid after molding a 2 mm PE prosthetic foaming sheet anterior shell over the tibia including the dorsum of the foot with 1 thin non stick molding. This shell is relatively thin and eliminates the sausage effect of multiple straps and provides equal pressure distribution for comfort and a better hold. You do not need to mold the posterior shell over the front. Just cut it off posterior and remove.
Mold and finish your posterior solid with socks to provide a 2-4 mm M-L increase.
Place the unfinished anterior shell back on your model and then the posterior finished shell.
Mark the anterior shell where the posterior trim line meets the anterior and remark the lines posterior for at least a 1/2 overlap depending on size of leg
Cut with scissors to mark and grind a long bevel on the inside of the anterior shell and finish.
Note that the anterior shell does not take up much room. Leave a little extra build up for your bony prominences. The 2-4 mm at most in M-L is minimal considering tissue displacement and type of socks used.
I'm guessing that you will encapsulate the metatarsal heads and use a toe wedge in this case. You may want to consider molding in hinges and stops to be installed and cut at a later date if the therapy is aggressive.
Application of the device may seem tricky at first but is very easy. Apply the anterior shell first using the hand opposing the leg, e.g., right leg, use left hand with thumb under toes and fingers over dorsum of foot and anterior shell. Then place calf section of posterior shell with other hand above maleolous and slide it up while keeping the anterior shell tucked in. Apply the ankle strap first to seat the heel and so on.
The beauty behind this technique is that there is no mechanical block to prevent circumferential compression to hold the leg in place as the shells are molded independent of each other. Good luck
Rick Lehneis, CPO ( No, we're not licensed yet in NY )
Lehneis Orthotics and Prosthetics Assoc., Ltd.
13 Bedell's Landing Road
Roslyn, NY 11576
1-516-621-7277
********************
To unsubscribe, send a message to: <Email Address Redacted> with
the words UNSUB OANDP-L in the body of the
message.
If you have a problem unsubscribing,or have other
questions, send e-mail to the moderator
Paul E. Prusakowski,CPO at <Email Address Redacted>
OANDP-L is a forum for the discussion of topics
related to Orthotics and Prosthetics.
Public commercial postings are forbidden. Responses to inquiries
should not be sent to the entire oandp-l list. Professional credentials
or affiliations should be used in all communications.
Response...
Kevin, try making the solid after molding a 2 mm PE prosthetic foaming sheet anterior shell over the tibia including the dorsum of the foot with 1 thin non stick molding. This shell is relatively thin and eliminates the sausage effect of multiple straps and provides equal pressure distribution for comfort and a better hold. You do not need to mold the posterior shell over the front. Just cut it off posterior and remove.
Mold and finish your posterior solid with socks to provide a 2-4 mm M-L increase.
Place the unfinished anterior shell back on your model and then the posterior finished shell.
Mark the anterior shell where the posterior trim line meets the anterior and remark the lines posterior for at least a 1/2 overlap depending on size of leg
Cut with scissors to mark and grind a long bevel on the inside of the anterior shell and finish.
Note that the anterior shell does not take up much room. Leave a little extra build up for your bony prominences. The 2-4 mm at most in M-L is minimal considering tissue displacement and type of socks used.
I'm guessing that you will encapsulate the metatarsal heads and use a toe wedge in this case. You may want to consider molding in hinges and stops to be installed and cut at a later date if the therapy is aggressive.
Application of the device may seem tricky at first but is very easy. Apply the anterior shell first using the hand opposing the leg, e.g., right leg, use left hand with thumb under toes and fingers over dorsum of foot and anterior shell. Then place calf section of posterior shell with other hand above maleolous and slide it up while keeping the anterior shell tucked in. Apply the ankle strap first to seat the heel and so on.
The beauty behind this technique is that there is no mechanical block to prevent circumferential compression to hold the leg in place as the shells are molded independent of each other. Good luck
Rick Lehneis, CPO ( No, we're not licensed yet in NY )
Lehneis Orthotics and Prosthetics Assoc., Ltd.
13 Bedell's Landing Road
Roslyn, NY 11576
1-516-621-7277
********************
To unsubscribe, send a message to: <Email Address Redacted> with
the words UNSUB OANDP-L in the body of the
message.
If you have a problem unsubscribing,or have other
questions, send e-mail to the moderator
Paul E. Prusakowski,CPO at <Email Address Redacted>
OANDP-L is a forum for the discussion of topics
related to Orthotics and Prosthetics.
Public commercial postings are forbidden. Responses to inquiries
should not be sent to the entire oandp-l list. Professional credentials
or affiliations should be used in all communications.
Citation
Kevin Matthews, “Outer boot design opinions continued,” Digital Resource Foundation for Orthotics and Prosthetics, accessed November 23, 2024, https://library.drfop.org/items/show/228515.
