Acetabulum: Bone Bed Preparation
Reaming
Ream the acetabulum at the anatomical site to the size determined at preoperative planning. Save part of the subcondral bone. The reaming should be over-sized in order to obtain a 2 - 3 mm cement mantle.
Anchorage holes
In order to remove as little bone as possible, drill and/or impact five to eight holes, 6 mm deep, in the cranical and central aspect of the acetabulum.
These anchorage holes increase the contact area between bone and cement, providing better fixation.
Brushing
Remove soft tissue and loose cancellous bone with a brush.
Pulse lavage
In order to obtain micro-interlock, use high-pressure pulse lavage repeatedly. Always use a nozzle with front orifices and a splash shield.
Secure the haemostasis with a sponge impregnated with adrenaline or liquid hydrogen peroxide.
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