Two-part bone cement composite containing particles in a non-uniform spatial distribution and devices for implementation

A method for treating or preventing a vertebral compression fracture, comprising the steps of:

• inserting a cavity-forming device into an area of cancellous bone in a vertebral body;
• displacing cancellous bone with the cavity-forming device to create a cavity defined by a surface of cancellous bone;
• introducing a first media into the cavity to line at least a portion of the surface thereby reducing the volume of the remaining cavity;
• and
• filling the remaining cavity with a second media;
• wherein the first media comprises particles within the range of from about 50% to about 80% by weight, and
• wherein the second media comprises particles within the range of from about 10% to about 50% by weight.

A method for treating or preventing a vertebral compression fracture, comprising the steps of:

• inserting a cavity-forming device into an area of cancellous bone in a vertebral body;
• displacing cancellous bone with the cavity-forming device to create a cavity defined by a surface of cancellous bone;
• introducing a first particle-containing media into the cavity to line at least a portion of the surface thereby reducing the volume of the remaining cavity;
• and
• filling the remaining cavity with a second particle-containing media;
• wherein the first media comprises at least about 60% particles by weight, and the second media comprises less than about 40% particles by weight.