Surgical cutting tool
OwnerErich Johann Mullerinventor
Life of this patent
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Abstract
Surgical cutting tool for manufacturing of a recess in a firm body tissue, in particular in a bone and/or in a cartilage, with a milling range rotatable around a central axis of rotation, with an outside lateral surface and an internal area substantially defined by the lateral surface and turned away from the worked on body tissue. The lateral surface is formed with at least two machining cutting edges, which proceed at the lateral surface from a machining center to a machining edge of the milling range and which are in particular spiral curved. Apertures are arranged adjacent to the cutting edges for the transport of the cutting splinters into the internal area, whereby the cutting edges are interrupted by means of recesses in such a way that the cutting edges are formed by individually cutting elements.
Claims16
A surgical cutting tool for forming a recess in a body tissue, comprising:
- a milling area on the surgical cutting tool that is rotatable around a central axis of rotation and has an outside lateral surface and an internal area which is substantially defined by the outside lateral surface and facing away from the machined body tissue, the outside lateral surface having at least two curved machining cutting edges which are formed thereon to provide a milling head and which proceed at the outside lateral surface from a machining center to a machining edge of the milling area, and
- apertures formed in the surgical cutting tool arranged adjacent to the cutting edges and configured to transport cutting splinters from the machined body tissue into the internal area,
- whereby the cutting edges are interrupted by recesses formed in the cutting edges to form individual cutting elements,
- wherein the outside lateral surfaces between two cutting edges comprise at least two stop surfaces which are arranged substantially parallel and adjacent to the cutting edges, and the stop surfaces are configured to limit the penetration of the cutting edges into the body tissue in relation to the penetration depth into the tissue, and
- wherein a first stop surface of the at least two stop surfaces limiting a first penetration of the cutting edge into the tissue has a first differential height in relation to a tip of the cutting edge, wherein the first differential height is essentially constant or slightly declining between a region of the rotational center and a circumferential region of the surgical cutting tool,
- and a second stop surface of the at least two stop surfaces extends to the opening of the second cutting edge and limits the penetration following the first penetration of the cutting edge into the tissue, wherein the second stop surface has a second differential height in relation to the tip of the cutting edge, which second differential height decreases from the region of the rotational center toward the circumferential region.
Dependencies are inferred from the claim text.