Jay J3 BACK User manual
STEP 1 Cushion Height
STEP 2 Cushion Width & Depth
STEP 3 PLA (Pelvic Loading Area) Size
STEP 4 PLA Insert
STEP 5 Cover Options
STEP 6 Positioning Cushion
OVERVIEW
1
For a custom-fit J3 Cushion, follow this
6-step guide to determine your
J3 Cushion Smart Part Number.
The part number that is generated over
the next several pages is for illustrative purposes.
Actual part numbers may vary.
J3 Cushion
Part
Numbers
begin with
“J3C”
- - - - -
STEP 1 STEP 2 STEP 3 STEP 4 STEP 5
J3C -
STEP 6
1
STEP 1
Cushion Height
S = Standard
x
3.6"
Note: Measurements above can vary depending upon cover selection.
D = Deep
Un-Loaded Femoral Height Loaded Femoral Height
3.0"
Un-Loaded Femoral Height
4.1" 3.5"
Loaded Femoral Height
2
3
Step 1 determines Cushion Height.
How much immersion and envelopment does
the user require? Standard or Deep height?
J3 Cushion
Part
Numbers
begin with
“J3C”
- - - - -
STEP 1 STEP 2 STEP 3 STEP 4 STEP 5
J3C -
STEP 6
S
2
3
STEP 2
Cushion Width
and Depth
12" 14" 15"16" 17" 18"19" 20"21" 22"23" 24"
12"SS
14"S
15"S
16"S
17"S
18"S
19"S
20"S
21"S
22"S
24"
Size Matrix
A
B
(A available)
C
(A&B available)
Std PLA
Special Order
N/A
Standard Size
Av ailable in Std. Ht Only
S
Width
Depth
Cushion Width
Cushion Depth
4
5
Step 2 determines Cushion Width and
Cushion Depth. Available sizes range
from 12" x 12" to 24" x 24".Write in the actual
inch measurements starting with the width.
J3 Part
Numbers
begin with
“J3”
- - -
STEP 1 STEP 2 STEP 3 STEP 4 STEP 5
J3 PL
J3 Cushion
Part
Numbers
begin with
“J3C”
S - - -
STEP 1 STEP 2 STEP 3 STEP 4 STEP 5
J3C -
STEP 6
1816
4
5
STEP 3
PLA (Pelvic Loading
Area) Size
Based upon human anatomy, PLA size has been
designed to optimize trochanteric loading and
stability. Standard PLA sizes shown below, alternate
sizes available on the order form.
Standard on 12" – 15"
widths
x
B
AC
Standard on 16" – 19"
widths
Standard on 20" – 24"
widths
6
7
Step 3 determines PLA size.
Reference page 6 for size and
width guidelines.
J3 Cushion
Part
Numbers
begin with
“J3C”
S - -
STEP 1 STEP 2 STEP 3 STEP 4 STEP 5
J3C -
STEP 6
1816 B
6
7
STEP 4
PLA Insert
Factory Filled PLA Insert
Field Variable PLA Insert
Three fluid chambers to reduce
fluid migration.
x
FF
FV Adjusts to changing user needs
and skeletal deformities.
Air Single PLA Insert
AS Adjustable immersion with stability.
Air Dual PLA Insert
AD Adjustable immersion with stability
and obliquity solution.
8
9
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5
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