Abrasive cutting surgical instrument

1. A surgical tissue cutting tool, comprising:

an elongated hollow member, having a distal open end, wherein said elongated hollow member is bent at a bending location;

a burr bit configured for forward and lateral cutting of tissue, distally protruding from the distal open end of said hollow member, the burr bit comprising: a proximal bit end, a cylindrical burr body having circumferential cutting/abrasive characteristics, and a close-ended distal bit front end;

a non-hollow rotary shaft comprising a driving end configured to be connected to a rotary motion actuator; and a target end, mechanically connected to the proximal bit end of the burr bit, and configured to affect rotary motion thereto;

a burr shield extending from the distal open end of said hollow member to at least partially cover the cylindrical burr body, wherein a distance between said burr tip and the bending location is less than 20 mm; and

a bearing surrounding the proximal end of the burr bit, while facilitating movement thereof;

wherein said burr bit is configured to rotate axially in an axis extending from said proximal bit end to said distal bit front end, and to affect abrasive grinding/cutting of tissue by contact with said burr body at areas not covered by said burr shield; and

wherein said bearing is configured to maintain the burr bit in an eccentric position relative to said elongated hollow member and to mitigate movement of said burr bit as a result of impact with the tissue, when in use.

2. The tool of claim 1 , wherein said burr shield is configured to facilitate separation between a hard tissue intended for cutting and a soft tissue.

3. The tool of claim 1 , further comprising a distal bearing element, integrated in said burr shield in proximity to said distal bit front end, configured to facilitate rotation of said burr bit.

4. The tool of claim 1 , wherein said burr bit has a length to radius ratio in the range of 0.5-2.

5. The tool of claim 1 , wherein said burr bit has a length of about 2-10 mm.

6. The tool of claim 1 , wherein said rotary shaft comprises bendable coiled and stranded wires.

7. The tool of claim 1 , wherein a distance between said burr shield and a center of said bending location is about 10-15 mm.

8. The tool of claim 1 , wherein a distance between said bending location and said burr bit is less than 10 mm.

9. The tool of claim 1 , wherein the said hollow member is bent at a bending angle of up to 90 degrees and at a bending radius of less than 10 mm at the bending location.

10. The tool of claim 1 , further comprising a handle configured to facilitate operation and control of said device by an operator and a rotary actuator, placed within said handle configured to induce rotation motion to said rotary shaft by said driving end thereof.

11. The tool of claim 1 , further comprising a control-interface configured to facilitate operation control over a rotation speed of said rotary actuator, rotation intermittency, a rotation direction or bending of said hollow member.

12. The tool of claim 1 , wherein the proximal end of the burr bit is closer to a wall of the hollow member at a side thereof opposite said burr shield.

13. The tool of claim 1 , wherein the burr body opposite the burr shield is essentially collinear with a wall of the hollow member.

14. The tool of claim 1 , wherein said distal bit front end comprises a cutting edge.

15. The tool of claim 1 , wherein said burr bit body is devoid of a central channel extending therethrough.

16. The tool of claim 1 , wherein said burr shield is integrally formed with said elongated hollow member.