Bone connector adapted for joining cut bone ends
First Claim
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1. A bone connector comprising:
- a first joint which is adapted to be inserted and secured in one of two cut bone pieces to be interconnected at the cut end thereof, said first joint comprising a substantially cylindrical body having a predetermined diameter and threads surrounding a peripheral surface thereof for screw engaging in the cortical bone of one of the two cut bone pieces, and a substantially flat end surface which is adapted to be substantially flush with the cut end of one of the two cut bone pieces, the cut end substantially encircling said substantially flat end surface upon insertion of said first joint;
a second joint which is adapted to be inserted and secured in the other of the two cut bone pieces at the cut end thereof, said second joint comprising a substantially cylindrical body having a diameter substantially equal to said predetermined diameter and threads surrounding a peripheral surface thereof for screw engaging in the cortical bone of one of the two cut bone pieces, and a substantially flat end surface which is adapted to be substantially flush with the cut end of the other of the two cut bone pieces, the cut end substantially encircling said substantially flat end surface of said second joint upon insertion of said second joint;
said first joint further comprising a stepped engaging groove extending through said substantially flat end surface in a direction substantially perpendicular to a longitudinal axis of said substantially cylindrical body, wherein said stepped engaging groove comprises a first groove having a first width meeting said substantially flat end surface, and a second groove having a second width greater than said first width, said second groove positioned within said cylindrical body and extending from said first groove; and
said second joint further comprising a pair of engaging projections fixed to and extending from said substantially flat end surface, wherein each said engaging projection comprises a leg portion substantially perpendicular to said substantially flat end surface and engageable with said first groove, and a projection which projects substantially perpendicularly from said leg portion and is engageable with said second groove, wherein said engaging projections engage with said stepped engaging groove to retain said substantially flat end surfaces in contact with one another.
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Abstract
A bone connector including a first joint which is inserted and secured in one of cut bone pieces to be interconnected at the cut end thereof, a second joint which is inserted and secured in the other bone piece at the cut end thereof, and engaging portions provided on the first and second joints to connect the same.
55 Citations
26 Claims
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1. A bone connector comprising:
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a first joint which is adapted to be inserted and secured in one of two cut bone pieces to be interconnected at the cut end thereof, said first joint comprising a substantially cylindrical body having a predetermined diameter and threads surrounding a peripheral surface thereof for screw engaging in the cortical bone of one of the two cut bone pieces, and a substantially flat end surface which is adapted to be substantially flush with the cut end of one of the two cut bone pieces, the cut end substantially encircling said substantially flat end surface upon insertion of said first joint; a second joint which is adapted to be inserted and secured in the other of the two cut bone pieces at the cut end thereof, said second joint comprising a substantially cylindrical body having a diameter substantially equal to said predetermined diameter and threads surrounding a peripheral surface thereof for screw engaging in the cortical bone of one of the two cut bone pieces, and a substantially flat end surface which is adapted to be substantially flush with the cut end of the other of the two cut bone pieces, the cut end substantially encircling said substantially flat end surface of said second joint upon insertion of said second joint; said first joint further comprising a stepped engaging groove extending through said substantially flat end surface in a direction substantially perpendicular to a longitudinal axis of said substantially cylindrical body, wherein said stepped engaging groove comprises a first groove having a first width meeting said substantially flat end surface, and a second groove having a second width greater than said first width, said second groove positioned within said cylindrical body and extending from said first groove; and said second joint further comprising a pair of engaging projections fixed to and extending from said substantially flat end surface, wherein each said engaging projection comprises a leg portion substantially perpendicular to said substantially flat end surface and engageable with said first groove, and a projection which projects substantially perpendicularly from said leg portion and is engageable with said second groove, wherein said engaging projections engage with said stepped engaging groove to retain said substantially flat end surfaces in contact with one another. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A bone connector comprising:
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first and second joints having a substantially circular cross-section wherein each said cross-section is substantially equal to the other in diameter, said first and second joints being adapted to be secured to cut ends of bone pieces to be interconnected; said first and second joints each comprising threads surrounding a peripheral surface thereof for screw engaging in the cortical bone of one of the two cut bone pieces, and wherein one of said first and second joints comprises a stepped engaging groove extending through an end surface thereof in a direction substantially perpendicular to a longitudinal axis of said one of said first and second joints, wherein said stepped engaging groove comprises a first groove having a first width meeting said end surface, and a second groove having a second width greater than said first width, said second groove positioned within said one of said first and second joints and extending from said first groove; the other of said first and second joints comprises a pair of engaging projections fixed to and extending from an end surface of said other of said first and second joints, wherein each said engaging projection comprises a leg portion substantially perpendicular to said end surface and engageable with said first groove, and a projection which projects from said leg portion and is engageable with said second groove, wherein said engaging projections engage with said stepped engaging groove to retain said end surfaces of said first and second joints in contact with one another; and wherein upon engaging said engaging projections with said stepped engaging groove to retain said end surfaces of said first and second joints in contact with one another, said first and second joints are adapted to maintain the cut ends of bone pieces in contact, such that the cut ends substantially encircle said end surfaces of said first and second joints. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A bone connector comprising:
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a first joint which is adapted to be secured to a cut end of one of two bone pieces to be interconnected; and a second joint which is adapted to be secured to a cut end of the other of the two bone pieces; said first joint provided with a first body having external threads wherein said first joint can be screwed and secured intramedullarly in the cut end of the one bone piece, said first body comprising a stepped engaging groove extending through an end surface thereof in a direction substantially perpendicular to a longitudinal axis of said first body, wherein said stepped engaging groove comprises a first groove having a first width meeting said end surface, and a second groove having a second width greater than said first width, said second groove positioned within said first body and extending from said first groove, wherein said end surface of said first body comprises a substantially flat end which is adapted to be substantially flush with the cut end of the one bone piece, the cut end substantially encircling said substantially flat end surface upon implantation of said first joint; said second joint being provided with a second body having external threads wherein said second joint can be screwed and secured intramedullarly in the cut end of the other bone piece, said second body comprising a pair of engaging projections fixed to and extending from an end surface of said second body, wherein each said engaging projections comprises a leg portion substantially perpendicular to said end surface and engageable with said first groove, and a projection which projects from said leg portion and is engageable with said second groove, wherein said engaging projections engage with said stepped engaging groove to retain said end surfaces of said first and second joints in contact with one another, wherein said end surface of said second body comprises a substantially flat end which is adapted to be substantially flush with the cut end of the other bone piece, the cut end substantially encircling said substantially flat end surface of said second joint upon implantation of said second joint; wherein engagement of said engaging projections in said stepped engaging groove is adapted to maintain the cut ends of the bone pieces flush to each other; said first and second joints being made of a material strong enough to hold the flush contact of the cut ends of the bone pieces. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification