THE EFFECT OF BLEEDING ON THE CEMENT-BONE INTERFACE - AN EXPERIMENTAL-STUDY

A model was developed to simulate bleeding from cancellous bone at the physiologic pressures and flow rates that can occur during total hip arthroplasty. The consequences of simulated bleeding on the penetratio n of bone cement into cancellous bone, the shear strength of the cemen t-bone interface, and the shear strength of bone cement were investiga ted. In the presence of active bleeding, the shear strength of the cem ent-bone interface was reduced significantly in 50% of interfaces in w hich cements of lower viscosity were used. The simulated bleeding did not exert a detrimental effect on the depth of cement penetration.