Bone remover
A bone remover for removing bones such as a femoral bone head in a minimally invasive surgical procedure comprises a shaft having a handle at a proximal end, a screw portion at a leading end and tapered toward the leading end, and a blade portion at the leading end of the screw portion. Helical threads of the screw portion are on a surface of, and coaxial with, the shaft. The blade portion is plate-shaped and tapered toward the leading end, and has a cutting blade attained by at least one raked surface formed in a lateral end portion. A proximal side of the raked surface and a top surface at the leading end of the threaded portion are either directly connected, or connected by an extension surface at the proximal end of the raked surface and the top surface at the leading end of the threaded portion.
1 . A bone remover comprising:
a shaft portion;
a handle portion disposed at a proximal end of the shaft portion;
a tapered screw portion formed at a leading end of the shaft portion and tapered toward a leading end of the tapered screw portion; and
a blade portion disposed at the leading end of the tapered screw portion, wherein
the tapered screw portion has a helical threaded portion formed on a surface of a shaft that is coaxial with the tapered screw portion, said helical threaded portion having a leading end;
the blade portion is a plate-shaped body tapered toward a leading end of the blade portion, and has a cutting blade attained by at least one raked surface formed in a lateral end portion, said at least one raked surface having a proximal end; and
a proximal side surface of said at least one raked surface and is connected to a top surface at the leading end of the helical threaded portion by a connection from the group consisting of a direct connection and a connection consisting of an extension of said at least one raked surface at the proximal end of said at least one raked surface, said extension being connected directly to said top surface at the leading end of the helical threaded portion.
2 . The bone remover according to claim 1 , wherein notches for self-tapping are formed in an axial direction on the helical threaded portion.