Operative Technique
11c. Acetabular component impactor
assembly
Once happy with the acetabular component size, the
components corresponding impaction plate should be
selected for assembly onto the impaction handle.
Figure 20
Before assembling the impaction handle to the
impaction plate make sure the ball bearing bushing is
visable at the tip of the handle. (Figure 20). If the ball
bearings are not visible, unscrew the strike plate until
Figure 21
resistance is felt and pull the bushing out. If the ball
bearings are not completely visible, once assembled,
the impactor plate will not engage with the cup.
Correct assembly of the impaction handle and
impaction plate is achieved by aligning the impaction
plate with the tip of the handle so that the slots are
aligned. (Figure 21). Care should be taken not to push
the ball bearings back into the shaft of the impaction
handle. Engage the handle with the impactor plate by
pushing the two parts together against a hard surface.
Figure 22
Confirm that the two parts are flush together and
therefore fully seated. (Figure 22).
The acetabular component is mounted onto the
impaction plate and handle by aligning the fingers of
the impaction plate over the cut outs on the peripheral
edge of the acetabular component (Figure 23).
Once aligned the cup is secured to the handle by
turning pulling the strike plate towards yourself and
turning it in a clockwise direction until hand tight. (Fig
ure 24). The cup is now ready to be impacted into the
acetabulum.
Figure 23
Figure 24
15
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