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Hello,
My name is Ana Medeiros, I’m graduate student in Chiba University
(Faculty of Engineering) – Japan, studying about materials applied in
pediatric prosthetic knees. I read some articles which explained this
subject, but I still have some big doubts on polycentric knees. So if
possible could anyone give me a little help? I would be forever
grateful.
1- It is advocated that polycentric knee is a good choice for a child
with knee disarticulation. Which are the most important points in the
polycentric design that influence this choice?
a) The ability to support the body weight in flexioned position? (center
of rotation – in full extension- not elevated and between superimposed
heel contact and push off lines)
b) The stability during stance-phase? (elevated instant center, or
hyper-stabilized center)
c) Flexion is not restricted until at least 130 degrees?
d) Mechanical knee center is better located (closer to the anatomical
center in sound limb) than in single-axis knees?
2- For a young child, who walk with flexionated knees in a wide base, a
flexionated prostheses is used? If so, (for knee disart.)that is the
polycentric “#1 a)” (writen above), or which other?
3- Which available pediatric knee would you use for a knee
disarticulation prostheses for a young child (for the instance suppose
the ideal one: average weight, height, motor development) who is
receiving the first articulated knee? Why?
Well, I may have asked redundant, wrong questions. If you think so,
please correct me and save a soul from the eternal ignorance.
Thank you very much for your attention and help.
Sincerely,
Ana
————–3393CA91CCE88D6CEB27355F
Content-Type: text/html; charset
us-ascii
Content-Transfer-Encoding: 7bit
Hello,
My name is Ana Medeiros, I’m graduate student in Chiba University (Faculty
of Engineering) – Japan, studying about materials applied in pediatric
prosthetic knees. I read some articles which explained this subject,
but I still have some big doubts on polycentric knees. So if possible could
anyone give me a little help? I would be forever grateful.
1- It is advocated that polycentric knee is a good choice for
a child with knee disarticulation. Which are the most important points
in the polycentric design that influence this choice?
a) The ability to support the body weight in flexioned position? (center
of rotation – in full extension- not elevated and between superimposed
heel contact and push off lines)
b) The stability during stance-phase? (elevated instant center, or
hyper-stabilized center)
c) Flexion is not restricted until at least 130 degrees?
d) Mechanical knee center is better located (closer to the anatomical
center in sound limb) than in single-axis knees?
2- For a young child, who walk with flexionated knees in
a wide base, a flexionated prostheses is used? If so, (for knee disart.)that
is the polycentric “#1 a)” (writen above), or which other?
3- Which available pediatric knee would you use for a knee disarticulation
prostheses for a young child (for the instance suppose the ideal one: average
weight, height, motor development) who is receiving the first articulated
knee? Why?
Well, I may have asked redundant, wrong questions. If you think so,
please correct me and save a soul from the eternal ignorance.
Thank you very much for your attention and help.
Sincerely,
Ana
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