WillowWood One Transtibial System

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The WillowWood One TT system adapts socket technology from the transfemoral version of the system, and makes it available for transtibial applications. The transtibial socket system, for use with either elevated vacuum or suction, delivers an airtight seal, an internal sleeve, and socket security.

Components of the WillowWood One TT system include an Alpha Duo® Liner, a One Gel Sock, an optional LimbLogic, a flexible inner socket, a One Sleeve, and the One Link. Together, these components create an airtight system that moves with an amputee’s residual limb for reliable suspension and comfort.

Throughout development, goals for the transtibial system were to make it comfortable to wear, control pistoning, facilitate a comfortable walking gait, and be compatible with various amputee activity levels. Clinical testing has shown unprecedented seal durability and compatibility with various activity levels and ages. Numerous amputees who tested the system reported feeling a closer fit on their residual limbs and experiencing an improved sense of security from the WillowWood One TT system over their previous prostheses.

See if your patient is a candidate for this system!

Product Highlights:

• Use system with suction suspension or with elevated vacuum
• Features two seal points ensuring that the airtight seal does not break
• Control your LimbLogic from your iPhone or iPad
• The Alpha Duo Liner, One Gel Sock, and the pre-flexed One Sleeve are part of the system and also available separately

LimbLogic®
Product Weight distal mount: 225 g
Product Height distal mount: 1.42″ (36 mm)
Patient Weight
350 lb (160 kg) for U.S. Activity Level 3* 300 lb (136 kg) for U.S. Activity Level 4*

*Body weight plus any loads normally or routinely carried cannot exceed this weight limit.

Alpha Duo® Liner
Style Symmetrical 4.5 mm
Interface Material interior: Alpha Classic® Gel
exterior: Alpha Silicone®
Color Dark Gray, Satin finish
Sizes** Medium, Medium Plus, Large, Large Plus, Extra Large

** Liner size determines size of the One Gel Sock.

One Sleeve
Interface Material Alpha Silicone®
Sizes Four sizes (Small, Medium, Large, Extra Large)
Sleeve Gel Thickness 2 mm
Color Gray
Warranty 3 months from date of invoice
U.S. L-Code Suggestion L5685
WillowWood One® TT System
U.S. L-Code Suggestions L5781 (vacuum only), L5647 (suction only), L5679, L8417, L5700, L5645, L5940, L5910, L5637, L5629, L5685
Lead Time WillowWood One Definitive Socket has a lead time of five business days after receipt of final diagnostic socket.
Warranty LimbLogic Pump: 24 months / Liner, Gel Sock: 12 months /
One Sleeve: 3 months / Definitive Socket: 2 months
Trial Period For non-fabricated socket: 30 days from date of invoice
For a fabricated socket: 30 days from the socket ship date from WillowWood on Liner and LimbLogic®.

Vacuum Kit with WillowWood Fabrication

Suction Kits

Vacuum – Fabrication not included

Vacuum Distal Mount Kit Includes:

Distal Mount LimbLogic® with charger and fob, Alpha Duo® Liner, One Gel Sock, One Sleeve, and liner drying stand. Elevated Vacuum part numbers include definitive socket fabrication.

Size* Part Number
Medium Duo Liner
with Small One Sleeve
ONE-TTVD-MD-SM
Medium Duo Liner
with Medium One Sleeve
ONE-TTVD-MD-MD
Medium Plus Duo Liner
with Small One Sleeve
ONE-TTVD-MP-SM
Medium Plus Duo Liner
with Medium One Sleeve
ONE-TTVD-MP-MD
Medium Plus Duo Liner
with Large One Sleeve
ONE-TTVD-MP-LG
Large Duo Liner
with Medium One Sleeve
ONE-TTVD-LG-MD
Large Duo Liner
with Large One Sleeve
ONE-TTVD-LG-LG
Large Duo Liner
with Extra Large One Sleeve
ONE-TTVD-LG-XL
Large Plus Duo Liner
with Large One Sleeve
ONE-TTVD-LP-LG
Large Plus Duo Liner
with Extra Large One Sleeve
ONE-TTVD-LP-XL
Extra Large Duo Liner
with Extra Large One Sleeve
ONE-TTVD-LG-XL

*Liner size determines size of One Gel Sock.
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† Suction Kit Includes:

Alpha Duo Liner, One Gel Sock, One Sleeve, and liner drying stand.
† To include One TT definitive suction socket fabrication, also order OFAB-ONE-TTP.

Size* Part Number
Medium Duo Liner
with Small One Sleeve
ONE-TTSU-MD-SM
Medium Duo Liner
with Medium One Sleeve
ONE-TTSU-MD-MD
Medium Plus Duo Liner
with Small One Sleeve
ONE-TTSU-MP-SM
Medium Plus Duo Liner
with Medium One Sleeve
ONE-TTSU-MP-MD
Medium Plus Duo Liner
with Large One Sleeve
ONE-TTSU-MP-LG
Large Duo Liner
with Medium One Sleeve
ONE-TTSU-LG-MD
Large Duo Liner
with Large One Sleeve
ONE-TTSU-LG-LG
Large Duo Liner
with Extra Large One Sleeve
ONE-TTSU-LG-XL
Large Plus Duo Liner
with Large One Sleeve
ONE-TTSU-LP-LG
Large Plus Duo Liner
with Extra Large One Sleeve
ONE-TTSU-LP-XL
Extra Large Duo Liner
with Extra Large One Sleeve
ONE-TTSU-XL-XL

*Liner size determines size of One Gel Sock.
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To fabricate your own vacuum system:

To fabricate your own vacuum system a. determine Alpha Duo Liner size* b. determine One Sleeve size
c. order One Link Kit (ONE-TT-LINKKIT) and One Sleeve Dummy d. order LimbLogic Distal Kit(s)

a. Duo Liner
Size* Part Number
Alpha Duo Liner with One Gel Sock, Medium D990-1940
Alpha Duo Liner with One Gel Sock, Medium Plus D990-1944
Alpha Duo Liner with One Gel Sock, Large D990-1946
Alpha Duo Liner with One Gel Sock, Large Plus D990-1948
Alpha Duo Liner with One Gel Sock, Extra Large D990-1947

b. One Sleeve
Size Part Number
One Sleeve, Small ONE-SLEEVE-TT-SM
One Sleeve, Medium ONE-SLEEVE-TT-MD
One Sleeve, Large ONE-SLEEVE-TT-LG
One Sleeve, Extra Large ONE-SLEEVE-TT-XL

c. One Sleeve Dummy
One Sleeve Dummy, Small ONE-TT-FD-SM**
One Sleeve Dummy, Medium ONE-TT-FD-MD**
One Sleeve Dummy, Large ONE-TT-FD-LG**
One Sleeve Dummy, Extra Large ONE-TT-FD-XL**

d. LimbLogic® Distal Kit
LimbLogic Unilateral Kit, Lamination LLV-2000-L
LimbLogic Bilateral Kit, Lamination LLV-2002-L

 *  Liner size determines size of One Gel Sock.
** Sleeve size determines final digits in One Sleeve Dummy part numbers.
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WillowWood One TT Sytstem Prosthetist Instructions
WillowWood One TT System User Instructions
WillowWood One TT System Definitive Socket Order Form (download writable PDF form)
WillowWood One TT System Fabrication Instructions
LimbLogic Quick-Start Guide
LimbLogic Prosthetist Instructions
LimbLogic Patient Instructions
Alpha Duo Liner Sizing Guide

Mobile Apps

Related Products
D990-1940 Alpha Duo Liner with One Gel Sock, Medium
D990-1944 Alpha Duo Liner with One Gel Sock, Medium Plus
D990-1946 Alpha Duo Liner with One Gel Sock, Large
D990-1948 Alpha Duo Liner with One Gel Sock, Large Plus
D990-1947 Alpha Duo Liner with One Gel Sock, Extra Large
ONE-SLEEVE-TT-SM One Sleeve, Small
ONE-SLEEVE-TT-MD One Sleeve, Medium
ONE-SLEEVE-TT-LG One Sleeve, Large
ONE-SLEEVE-TT-XL One Sleeve, Extra Large
ONE-SOCK-MD One Gel Sock, Medium
ONE-SOCK-MP One Gel Sock, Medium Plus
ONE-SOCK-LG One Gel Sock, Large
ONE-SOCK-LP One Gel Sock, Large Plus
ONE-SOCK-XL One Gel Sock, Extra Large
OFAB-ONE-TTP Transtibial Definitive Socket Fabrication
ONE-TT-FABKIT-SM** Fabrication Kit w/One Link & One Sleeve Dummy, Small
ONE-TT-FABKIT-MD** Fabrication Kit w/One Link & One Sleeve Dummy, Medium
ONE-TT-FABKIT-LG** Fabrication Kit w/One Link & One Sleeve Dummy, Large
ONE-TT-FABKIT-XL** Fabrication Kit w/One Link & One Sleeve Dummy, Extra Large
LLV -COM LimbLogic® Communicator
LLV-21011 LimbLogic® Inductive Charger
LLV-21200 LimbLogic® Key Fob
LL-21240 LimbLogic® Fob Replacement Battery

** Sleeve size determines final digits in part number.


WillowWood One System for Transtibial Amputees


WillowWood One TT system: Anthony’s Experience


Fabricating the WillowWood One TT System


Final Assembly of the TT System

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