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INTRODUCTION
The Child's Play Knee with Manual Lock is a four‐bar, polycentric knee that utilizes a mechanical locking system with a manually
operated release lever. It is a lightweight, low‐profile knee that provides constant friction and spring extension‐assist for pediatric
amputees. The Child's Play Knee with Manual Lock is appropriate for pediatric amputees with low to high activity levels and is
compatible with 22mm endoskeletal modular prosthetic components.
Product Code
Description
SSK610A
Child's Play Knee with Manual Lock
SSK610A‐DIS
Lamination Bracket for SSK610A
LIMITATIONS
The Child's Play Knee with Manual Lock (SSK610A) requires a clearance of 15 mm (.59") from center of knee to the mounting surface.
The knee reaches full flexion at 140°.
INSTALLATION AND USE
Warning: Recommended installation and use procedures must be followed for maximum safety and service life. Never modify the
Child's Play Knee with Manual Lock. Failure to follow the installation and use procedures set forth following may lead to
structural failure of the components subjecting the user to a risk of serious personal injury.
Warning: Do not expose knee to water. If the knee comes in contact with water, the extension assist control should be thoroughly
evaluated for functionality.
Socket Attachment
SSK610A comes preassembled with a pyramid (SSK610A‐PYR). The attachment screw should be tightened to 66 Nm (48.7 ft‐lbs)
using an 8mm hex driver. Use low‐strength thread retaining compound such as Loctite 242 or similar (this is to prevent galling or
seizing of the threads when the bolt is tightened). A rotatable Knee Disarticulation Mounting Bracket, (SSK610A‐DIS Laminating
Bracket for SSK610A), is also available and is designed to be laminated into place as follows:
1. Roughen the mounting area of the socket surface with sandpaper to ensure adhesion of the lamination.
2. Mark the position of the bracket in the appropriate alignment on the laminated socket.
3. Bend the metal mounting bracket to closely match the contour of the socket in the desired position while maintaining correct
alignment. Remove any bending iron impressions from the surface of the metal bracket.
4. Remove the mounting bracket from the knee by loosening the attachment screw located distally on the bracket with an 8mm
hex key. Remove the attachment screw and set it aside until the knee is to be re‐assembled.
5. Prepare the mounting bracket for lamination. Use clay to protect the attachment surface and screw holes from filling with
laminate. Bond Kemblo or Pelite over the attachment surface and screw hole to further prevent resin intrusion.
6. Temporarily secure the mounting bracket into place with methyl methacrylate or epoxy. If necessary, the mounting bracket can
be riveted into place through the four mounting holes for additional strength.
Caution: Test walking on an unreinforced mounting bracket after temporarily securing it in place may cause failure.
7. Secure the mounting bracket to the socket using several layers of fiberglass casting tape as a temporary reinforcement. When
satisfactory alignment has been achieved, remove the fiberglass casting tape before application of the definitive lamination.
8. Laminate the mounting bracket to the socket surface using an appropriately strong layup for the individual patient.
9. Trim the hardened lamination to expose the distal mounting surface for the screw hole. Do not cut or nick the mounting bracket
when trimming the laminate away from the distal surfaces.
10. Reinstall the knee unit into the mounting bracket so that the label is anterior facing.
11. Use the attachment screw, previously set aside, to attach the mounting bracket to the knee unit. Use a torque wrench with an
8mm hex driver to tighten the attachment screw to 66 Nm (48.7 ft‐lbs). Use low‐strength thread retaining compound such as
Loctite 242 or similar.
Note:
•
The application of the thread retaining compound is to prevent galling or seizing of the threads when the bolt is tightened,
and to ensure proper torque value is achieved.
Trulife www.trulife.com Page 1 of 3
Weight Limit
55 kg/121 lb
55 kg/121 lb
Child's Play Knee with Manual Lock
SSK610A
Instructions and User Guide
29151‐001 REV G
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Summary of Contents for Trulife Child's Play Knee with Manual Lock
- Page 1 5. Prepare the mounting bracket for lamination. Use clay to protect the attachment surface and screw holes from filling with laminate. Bond Kemblo or Pelite over the attachment surface and screw hole to further prevent resin intrusion. 6. Temporarily secure the mounting bracket into place with methyl methacrylate or epoxy. If necessary, the mounting bracket can be riveted into place through the four mounting holes for additional strength. Caution: Test walking on an unreinforced mounting bracket after temporarily securing it in place may cause failure. 7. Secure the mounting bracket to the socket using several layers of fiberglass casting tape as a temporary reinforcement. When satisfactory alignment has been achieved, remove the fiberglass casting tape before application of the definitive lamination. 8. Laminate the mounting bracket to the socket surface using an appropriately strong layup for the individual patient. 9. Trim the hardened lamination to expose the distal mounting surface for the screw hole. Do not cut or nick the mounting bracket when trimming the laminate away from the distal surfaces. 10. Reinstall the knee unit into the mounting bracket so that the label is anterior facing. 11. Use the attachment screw, previously set aside, to attach the mounting bracket to the knee unit. Use a torque wrench with an 8mm hex driver to tighten the attachment screw to 66 Nm (48.7 ft‐lbs). Use low‐strength thread retaining compound such as Loctite 242 or similar. Note: • The application of the thread retaining compound is to prevent galling or seizing of the threads when the bolt is tightened, and to ensure proper torque value is achieved. Trulife www.trulife.com Page 1 of 3 ...
- Page 2 2. Loosening or tightening the screw located on the posterior side of the rear linkage with a 4mm hex key. • Turning the screw counter‐clockwise increases stability. Figure 2: Child's Play Knee with • Turning the screw clockwise decreases stability. Manual Lock adjustments Note: The manual locking mechanism will not function if stability is decreased too much 3. Re‐tighten the locking set screw to prevent migration of the stability adjustment screw. Locking Mechanism The SSK610A Child’s Play Knee with Manual Lock has a lock that can be manually released when knee flexion is desired by using the lock cable. This lock can also be set open to allow free motion by lifting the lock lever and tightening the Anti‐lock Screw located on the upper, left and right sides of the knee using a 2mm hex key. Use Loctite® 242 (or similar) on this screw to keep it from backing out. 1. Once the knee is assembled, locate an appropriate location on the socket for the locking mechanism handle and attaching it to the socket with the screw provided. Trulife www.trulife.com Page 2 of 3 ...
- Page 3 This warranty will not apply if the PRODUCT has been damaged by misuse, abuse, neglect, improper care, failure to follow instructions, abnormal wear and tear, or in the event that the PRODUCT has been modified/repaired by persons unauthorized by Trulife. If a defect in material or workmanship is found during the warranty period, Trulife will, at Trulife’s option, either repair or replace the product. If it is not possible to repair or replace the product, Trulife will be limited to refunding the purchase price. Trulife will not be liable under any legal theory for any direct, indirect, special, incidental or consequential damages arising from the use of or inability to use this product. The application guidelines for this Trulife product are for the use of and by a certified, qualified practitioner only. Patients are not to attempt to apply or adjust the item unless expressly instructed to do so by the practitioner responsible for the prescription and/or initial fitting of the device. All patient questions should be referred to the practitioner and not to the manufacturer. The manufacturer warrants only that the enclosed ...
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