Patent ID: 8016834

Claim:
A process for treating a vertebral body comprising the following steps: introducing two trocars and two trocar jackets into the vertebral body; removing the trocars, leaving the trocar jackets in place; extracting spongiosa of the vertebral body into a first biopsy cannula introduced into a first of the trocar jackets to form a first substantially cylindrical hollow space, and extracting spongiosa of the vertebral body into a second biopsy cannula introduced into a second of the trocar jackets to form a second substantially cylindrical hollow space, wherein the first and second substantially cylindrical hollow spaces are directly connected to each other only at their distal ends in the vertebral body; filling two cement cannulas with bone cement; introducing the respective filled cement cannulas into the respective trocar jackets such that a distal end of each respective cement cannula projects beyond a distal end of the respective trocar jacket into the first and second substantially cylindrical hollow spaces respectively, and almost lies against an oppositely lying inner wall of the vertebral body; and depositing the bone cement along both the first and second substantially cylindrical hollow spaces by stepwise advancement of a first plunger and a second plunger, respectively, into the respective cement cannulas, while the cement cannulas are stepwise extracted from the vertebral body for dosed or metered extrusion of the bone cement.