32 | Ottobock Helix
3.2 Positioning of the lamination plate
INFORMATION
During plaster cast taking, please make sure to apply the front casting block with an external rotation position
of 5°.
The bottom side of the lamination plate must not be shortened or bent.
If required, the front side of the lamination plate can be reduced in length to some degree and the corners be
rounded off. However, sufcient material must be left for later assembly of the connection system. Excessive
reduction of the front side of the lamination plate can have negative effects on the later laminate connection to
the pelvic socket.
2
y y/2
Centre of the body (navel)
Alignment
reference line
1
Neutral
position
Pelvic socket
reference line
For correct positioning of the pelvic socket/lamination plate, please proceed as follows:
1. Preparation: First bring the bottom side of the lamination plate in horizontal position (sagittally and frontally).
2. Positioning in the sagittal plane (Fig. 1): Position the pelvic socket in accordance with the determined pelvic
socket reference line as far anteriorly over the lamination plate as possible. Pay attention to that the pelvic
socket reference line is perpendicular to the horizontally positioned bottom side of the lamination plate.
3. Positioning in the frontal plane (Fig. 2): Position the pelvic socket in accordance with the determined pelvic
tilt. Transfer half of the mediolateral measurement y between the centre of the body and the contralateral outer
side to the pelvic socket side (y/2) and make a vertical mark. The middle of the lamination plate's front side
should coincide with this vertical mark.
4. Positioning in the transversal plane: Position the pelvic socket in the walking direction in accordance with the
determined pelvic rotation position. Pay attention to that the front side of the lamination plate is applied with
an external rotation position of about 5°.
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