Coring device for preserving living tissue
AssigneeDsm IP Assets B.V.
InventorsGino Bradica, Timothy Ringeisen
Life of this patent
Estimating the term…
Abstract
Improved coring devices suitable for articular cartilage and bone, wherein the cutting device is capable of slicing through a tough protective tangential zone, delicately separating the shock absorbing columns of cells in the radial zone of the cartilage, and finally cutting into the hard underlying bone in a manner that preserves the viability of osteochondral cells. The coring device features an annulus having a flat annular cutting edge interrupted by at least one serration having neutral cutting angles. A method for concurrently removing cartilaginous and bony tissue using an improved coring device that preserves the viability of osteochondral cells.
Claims27
An improved tissue cutting device, the improvement comprising a tissue cutting portion comprising an annulus having an annular cutting element on a distal surface of said annulus, said annular cutting element comprising at least one level surface interrupted by at least one proximally directed serration, said serration being defined by a radius curve, said at least one level surface having a sharp edge that is arranged to neatly slice soft tissue, said at least one serration being arranged to cut into hard tissue, wherein the junction of the level surface and the serration forms a pair of cutting angles, wherein said cutting angles are each arranged at or about a nearly neutral cutting angle, wherein the use of said cutting device preserves cell viability.
A multiphasic cutting tool that reduces cellular damage, is capable of penetrating at least one tissue presenting at least a biphasic micro-architecture, said multiphasic cutting tool comprising a head portion, and a means for supporting said head portion while in use, said head portion comprising
- a. a sharp level cutting edge to neatly slice soft tissue;
- b. a double beveled wedge for separating tissues;
- and
- c. at least one concave serration, wherein a junction of said at least one concave serration and said level cutting edge presents at least one pair of neutral cutting angles capable of cutting into hard tissue.
Dependencies are inferred from the claim text.