-
uction to a Type of Resin-Reinforced Rapid
Prototyping Transtibial Socket
This
article
introduced a type of rapid prototyping (RP)
transtibial
socket
that is fabricated by a fused
deposition modeling (FDM) machine
and
wrapped
with
a
layer
of
unsaturated
polyester
resin
(UPR)
to
enhance
its
flexural strength. As current rapid prototyping
machines
use a
layer-based process to manufacture
products, this will result
in RP
products liable to
break along forming layers once
bending moment is
applied.
To prevent RP prosthetic socket from
breakage, this study
proposed wrapping a layer of
unsaturated polyester
resin around a
preliminary thin RP socket to reinforce
its
flexural strength.
Factors
affecting the strength of the
resin-reinforced RP
socket
include
thickness
and
forming
orientation
of
the
preliminary
RP
socket,
thickness
of the UPR layer, and type of
material
used to make the
preliminary RP
socket. Employing
Taguchi experimental
design
method and ASTM
three-point bending
test standard, the parameters
that influence the
flexural
strength of the resin-reinforced RP
prosthetic
socket can be
determined.
Based
on
the
appropriate parameters,
including
thickness
of
the
RP
layer
and
UPR
layer,
the
RP
material
and
RP
fabricating
orientation,
the preliminary thin RP
prosthetic
sockets can be
fabricated by an FDM
machine.
And
the
thin
layer
preliminary
RP
sockets
were
then
wrapped
with
cotton
socks
and
laminated
UPR
layer
to
form
resin-reinforced
RP
sockets.
To
confirm the effectiveness of the resin-reinforced
sockets developed
in
this study, the pressures at residual
limb/socket interface were
measured
by
using
a
pressure
distribution
measurement
system
and
movement
was
captured by a motion analysis system
while a patient wears
the
resin-reinforced RP socket. Two resin-
reinforced RP sockets have been
fabricated and tested by a volunteer
amputee. Analysis of the
experimental results would assist a
prosthetist to assess the
distribution
of
interface pressures at the pressure-tolerant (PT)
and
pressure-relief (PR)
areas of the residual limb. And, the
gait pattern
will
be
used
to
evaluate
the
applicability
while
the
resin-reinforced
RP
socket
is worn.
Trial
uses
for
durability
test
of
the
proposed
RP
socket
are being arranged.
?2010
ASME
介绍了一种快速成型
Resin-
Reinforced
小腿插座
本文
介绍了一种快速成型
(RP)
插座
,<
/p>
小腿由熔融沉积制造
(FDM)
机器包装
,
用一层不饱和聚酯树脂
(UPR),
以提高其抗弯强度。当前快速成形机使用
layer-base
d
过程来生产产品
,
这将会导致
RP
产品责任打破一次弯矩作用下沿形
成层应
用。为了防止
RP
假肢接受腔的从破损
,
本研究提出包一层不饱和聚酯树脂
在初步薄
< br>RP
插座
,
加强其抗弯强度。强
度的影响因素
resin-reinforced RP
插座<
/p>
的方向包括厚度和形成初步的
RP
插座、
固化层的厚度和注塑材料的种类
,
用来做
初步的
RP
插座。采用田口实验设计方法和
< br>ASTM
标准三点弯曲试验参数是影响其
抗弯强度的
resin-reinforced RP
假肢接受腔的被确定。基
于适当的参数
,
包括
厚度的
RP
层和固化层
,
制作材
料和
RP RP
定位、初步薄
RP
假肢接受腔分可以编造
一个机器。和薄层初步
RP
带卯后用棉花袜子和叠层
UPR
层形成
resin-reinforced
RP
窝。
确认
resin-reinforced
插座的有效性发达的本构方程、残肢压力测量
/
插座接口采用
压力分布测量系统和运动被运动分析系统中
,
患者戴上了
resin-reinforced
RP
插座。两个
resin-reinforced RP
插座被捏造的
,
经一名志
< br>愿者的被截肢者。分析实验结果将帮助一个高品质的评估界面压力分布在
pres
sure-tolerant(PT)
和减压
(PR)
地区的残肢。而且
,
步态模式将被用来评价
的适用性
,resin-reinforced RP
插座架。试验采用耐久性试验的
RP
插座被安排
了。
2.
The
Gait
Analysis
and
Interface
Pressure
Measurement
Between Stump and Resin-Reinforced
Rapid Prototyping
Transtibial
Socket
Currently,
rapid
prototyping
(RP)
products
are
manufactured
by
layer-based process; this
result may cause RP products to break
easily
along
layers
when
a
bending
moment
is
applied.
To
prevent
RP
transtibial
sockets from breaking, wrapping a layer
of unsaturated polyester resin
(UPR) around transtibial sockets to
reinforce its flexural strength is
proposed. To verify the applicability
of resin-reinforced RP socket
fabrication,
two
experimental
systems,
including
a
socket
sensor
measurement
and
gait
analysis
system,
are
used
to
obtain
interface
pressures between
stump,
socket and gait
characteristics during stance
phase
while
such
type
of
prosthetic
socket
is
used.
A
male
volunteer
with
a
left
below-knee
amputation,
a
twenty-year
transtibial
socket
user,
was
selected
for this
study. In the experiments, sensors were pasted
on
the
stump
and
measurement
data
was
collected
at
different
walking
speeds.
The
results of these experiments showed
that the interface
pressures
were
concentrated on pressure-tolerant
areas, and the swing phase
and stride
length
of
stump
increased
while
the
volunteer
was
walking
at
a
fast
speed.
The
resin-reinforced rapid prototyping
sockets
have better comfortable
quality
of
fitting
because
the
interface
pressures
are
more
concentrated
on
pressure-tolerant
areas
including
the
patella
tendon
and
medial
tibia
flare while wearing the new type
of
sockets.
?2009
ASME