Method and device for surgical bone grinding
First Claim
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1. A bone grinder, comprising:
- a housing having a bone chute therethrough and a chamber intersecting said bone chute, wherein said bone chute has a bone segment entry portion for receiving bone segments, and an exit opening for exiting bone fragments of a predetermined size produced from said received bone segments;
a grinding assembly provided in said chamber, said grinding assembly rotatable about an axis traversing an extent of said bone chute, wherein said grinding assembly includes;
(a) a shaft rotatable about said axis, and (b) a plurality of cutting plates, each plate having opposed first and second sides, a corresponding thickness therebetween and an opening through said thickness of the plates between said opposed sides for matingly receiving said shaft, and at least one cutting edge between said opposed sides for fragmenting said bone segments within said entry portion when said cutting plate rotates with said shaft;
wherein at least two of said cutting plates are contiguous on said shaft so that said at least one cutting edge on each of said contiguous cutting plates have contiguous cutting paths in said bone chute.
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Abstract
A method and apparatus for grinding bone for use in orthopaedic procedures includes a bone shoot for receiving bone segments which are fed into a grinding assembly rotatable about an axis such that a plurality of cutting plates rotate about such axis to grind bone into uniform and desirable sized portions suitable for use in cementing of bone implants.
15 Citations
7 Claims
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1. A bone grinder, comprising:
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a housing having a bone chute therethrough and a chamber intersecting said bone chute, wherein said bone chute has a bone segment entry portion for receiving bone segments, and an exit opening for exiting bone fragments of a predetermined size produced from said received bone segments;
a grinding assembly provided in said chamber, said grinding assembly rotatable about an axis traversing an extent of said bone chute, wherein said grinding assembly includes;
(a) a shaft rotatable about said axis, and (b) a plurality of cutting plates, each plate having opposed first and second sides, a corresponding thickness therebetween and an opening through said thickness of the plates between said opposed sides for matingly receiving said shaft, and at least one cutting edge between said opposed sides for fragmenting said bone segments within said entry portion when said cutting plate rotates with said shaft;
wherein at least two of said cutting plates are contiguous on said shaft so that said at least one cutting edge on each of said contiguous cutting plates have contiguous cutting paths in said bone chute. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for grinding bone, comprising:
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providing a housing having a bone chute therethrough and a chamber intersecting said bone chute, wherein said bone chute has a bone segment entry portion for receiving bone segments, and an exit opening for exiting bone fragments of a predetermined size produced from said received bone segments;
providing a grinding assembly provided in said chamber, said grinding assembly rotatable about an axis traversing an extent of said bone chute, wherein said grinding assembly includes;
(a) a shaft rotatable about said axis, and (b) a plurality of cutting plates, each plate having opposed first and second sides, a corresponding thickness therebetween and an opening through said thickness of the plates between said opposed sides for matingly receiving said shaft, and at least one cutting edge between said opposed sides for fragmenting said bone segments within said entry portion when said cutting plate rotates with said shaft;
wherein at least two of said cutting plates are contiguous on said shaft so that said at least one cutting edge on each of said contiguous cutting plates have contiguous cutting paths in said bone chute.
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Specification