Medical instrumentarium
AssigneeAesculap AG
InventorsMartin Hirt, Thomas Güttler, Christian Bader
Life of this patent
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Abstract
The invention relates to a medical instrumentarium, in particular for implanting a hip joint stem, comprising a rasp instrument with a rasp shank defining a longitudinal axis, which rasp shank has an anterior side face, a posterior side face, a medial side face, and a lateral side face, wherein the side faces at least partially have rasp teeth which are formed running parallel to each other and circumferential or at least partially circumferential with respect to the longitudinal axis, wherein the rasp instrument comprises a rotational stabilization device for increasing a rotational stability of the rasp shank driven into a bone cavity, in particular a femur cavity.
Claims17
A medical instrumentarium for implanting a hip joint stem, comprising:
- a rasp instrument with a rasp shank defining a longitudinal axis, which rasp shank has an anterior side face, a posterior side face, a medial side face, and a lateral side face, wherein the side faces at least partially have rasp teeth which are formed running parallel to each other and circumferential or at least partially circumferential with respect to the longitudinal axis, wherein the rasp instrument comprises a rotational stabilization device for increasing a rotational stability of the rasp shank driven into a bone cavity, in particular a femur cavity;
- wherein the rotational stabilization device comprises a multitude of stabilization grooves on at least one side face of the rasp shank and wherein the multitude of stabilization grooves runs obliquely relative to the rasp teeth;
- wherein the multitude of stabilization grooves is formed at least one of on the lateral side face and on the medial side face and on the anterior side face and on the posterior side face of the rasp shank;
- wherein the multitude of stabilization grooves that are formed on the lateral side face and on the medial side face all run parallel or substantially parallel to each other.
A medical instrumentarium, in particular for implanting a hip joint stem, comprising a rasp instrument with a rasp shank defining a longitudinal axis, which rasp shank has an anterior side face, a posterior side face, a medial side face, and a lateral side face, wherein the side faces at least partially have rasp teeth which are formed running parallel to each other and circumferential or at least partially circumferential with respect to the longitudinal axis, wherein the rasp instrument comprises a rotational stabilization device for increasing a rotational stability of the rasp shank driven into a bone cavity, in particular a femur cavity, wherein the rotational stabilization device comprises a multitude of stabilization grooves on at least one side face of the rasp shank and wherein the multitude of stabilization grooves runs obliquely relative to the rasp teeth, wherein the multitude of stabilization grooves at least partially has a U-shaped or V-shaped cross-sectional shape, wherein a groove depth of the multitude of stabilization grooves on the lateral side face is greater than a tooth depth of the rasp teeth, and wherein a groove depth of the multitude of stabilization grooves on the medial side face is less than a tooth depth of the rasp teeth.
A medical instrumentarium for implanting a hip joint stem, comprising:
- a rasp instrument with a rasp shank defining a longitudinal axis, which rasp shank has an anterior side face, a posterior side face, a medial side face, and a lateral side face, wherein the side faces at least partially have rasp teeth which are formed running parallel to each other and circumferential or at least partially circumferential with respect to the longitudinal axis, wherein the rasp instrument comprises a rotational stabilization device for increasing a rotational stability of the rasp shank driven into a bone cavity, in particular a femur cavity, wherein the rotational stabilization device comprises a multitude of stabilization grooves on at least one side face of the rasp shank and wherein the multitude of stabilization grooves runs obliquely relative to the rasp teeth, wherein the medial side face has a proximal side face region and a distal side face region, and wherein the proximal side face region is concavely curved pointing away from the rasp shank in a direction parallel to the longitudinal axis and is planar or convexly curved pointing away from the rasp shank in a direction perpendicular to the longitudinal axis, and wherein the multitude of stabilization grooves of the medial side face is formed in the proximal or substantially in the proximal side face region;
- wherein the rotational stabilization device comprises a multitude of stabilization grooves on at least one side face of the rasp shank and wherein the multitude of stabilization grooves formed at least one of on the lateral side face and on the medial side face and on the anterior side face and on the posterior side face of the rasp shank;
- wherein the multitude of stabilization grooves that are formed on the lateral side face and on the medial side face all run parallel or substantially parallel to each other.
Dependencies are inferred from the claim text.