CIRCULATING BLOOD DIMINISHES CEMENT PENETRATION INTO CANCELLOUS BONE - IN-VIVO STUDIES OF 21 ARTHROTIC FEMORAL HEADS

We compared the penetration depth into cancellous bone when pressurizi ng cement at predetermined pressure levels, and at different times aft er cement mixing, in 21 arthrotic femoral heads during total hip repla cement. To determine the influence of circulating blood on cement pene tration, cement was injected into holes drilled into the femoral head before and after osteotomy of the femoral neck. The penetration of cem ent increased on the average 100 percent in the absence of circulation .