Self-contouring plate system for bone fractures
View Patent ↗The self-contouring plate system for bone fractures allows a surgeon to bridge a bone fracture, primarily in bones of complex shape where the use of plates or screws is difficult. The self-contouring plate is formed from a series of similar or identical rigid elements, the elements able to bend and rotate with respect to each other. This flexibility is initially helpful as the surgeon contours the device to the shape of the bone. When the desired shape is reached, the elements are locked into place. The length of device is adjusted by adding or removing elements, much like a necklace. Each element of the self-contouring plate includes a ball that extends away from a body, a cavity for receiving the ball of the neighboring plate, and a screw to compress the ball within the cavity.
1. A device adapted to connect across a bone fracture, the device flexible for positioning and then rigid for support, the device comprising:
a multiplicity of individual plates connecting at ball and socket joints;
each ball and socket joint allowing for rotation of the individual plates with respect to each other;
the ball and socket joints each formed from a ball and a socket;
the ball and the socket located at opposite ends of a body;
the socket having a compressed position and an uncompressed position;
the ball able to rotate within the socket when the socket is in the uncompressed position;
the ball unable to rotate within the socket when the socket is in the compressed position;
a first compression screw located adjacent to the socket;
wherein tightening the first compression screw puts the socket in the compressed position, and loosening the first compression screw puts the socket in the uncompressed position;
whereby a surgeon can position the device, adjust a position of the multiplicity of individual plates, and fix the position of the multiplicity of individual plates before placing against a bone.
2. The device adapted to connect across a bone fracture of claim 1 , further comprising:
a second compression screw;
the second compression screw located opposite the first compression screw, across the socket;
wherein a combination of the first compression screw and the second compression screw determines whether the socket is in the compressed position or the uncompressed position.
3. The device adapted to connect across a bone fracture of claim 1 , wherein:
the first compression screw does not pass through the ball, and
the ball is solid.
4. The device adapted to connect across a bone fracture of claim 1 , wherein:
a lower surface of the multiplicity of individual plates is curved to match a surface profile of a curved bone.
5. The device adapted to connect across a bone fracture of claim 1 , wherein:
the socket is split by a compression gap;
the compression gap opening and closing depending upon whether the socket is in the compressed position or in the uncompressed position.
6. The device adapted to connect across a bone fracture of claim 1 , further comprising:
a head plate;
the head plate including a socket, but lacking a ball;
the head plate for placement at a first end of the multiplicity of individual plates.
7. The device adapted to connect across a bone fracture of claim 1 , further comprising:
a tail plate;
the tail plate including a ball, but lacking a socket;
the tail plate for placement at a second end of the multiplicity of individual plates.
8. A device to bridge a fracture of a curved bone, the device comprising:
a first plate, a second plate, and a third plate;
the first plate, the second plate, and the third plate each formed from:
a body;
a head connected to the body by a neck;
a socket;
the socket having a compressed position and an uncompressed position;
the first plate, the second plate, and the third plate affixed to each other by interaction of the head in the socket of adjacent plates;
the socket placed in the uncompressed position to allow each plate to be oriented;
the socket placed in the compressed position to fix each plate with respect to its adjacent plate;
a first compression screw;
a second compression screw;
the first compression screw and the second compression screw located on opposite sides of the socket;
wherein a combination of the first compression screw and the second compression screw determines whether the socket is in the compressed position or the uncompressed position; and
whereby a user can loosely connect the first plate, the second plate, and the third plate, position the device against the curved bone, and then secure positions of the first plate, the second plate, and the third plate.
9. The device to bridge a fracture of a curved bone of claim 8 , wherein:
the first compression screw does not pass through the head, and the head is solid.
10. The device to bridge a fracture of a curved bone of claim 8 , wherein:
a lower surface of the first plate, the second plate, and the third plate is curved to match a surface profile of the curved bone.
11. The device to bridge a fracture of a curved bone of claim 8 , wherein:
the socket is split by a compression gap;
the compression gap opening and closing depending upon whether the socket is in the compressed position or in the uncompressed position.
12. The device to bridge a fracture of a curved bone of claim 8 , further comprising:
a head plate;
the head plate including a socket, but lacking a ball;
the head plate for placement at a first end of a combination of the first plate, the second plate, and the third plate.
13. The device to bridge a fracture of a curved bone of claim 8 , further comprising:
a tail plate;
the tail plate including a ball, but lacking a socket;
the tail plate for placement at a second end of a combination of the first plate, the second plate, and the third plate.
14. A device to bridge a bone fracture of a curved bone, the device comprising:
a plurality of rigid elements;
each element of the plurality of rigid elements including:
a body;
the body including a hole for a bone screw;
a socket within a first end of the body;
a ball-shaped head at a second end of the body;
the ball-shaped head sharing a centerline with the body;
the ball-shaped head able to be movably interfaced with the socket of an adjacent rigid element of the plurality of rigid elements;
the ball-shaped head having an unlocked condition with respect to the socket, and the ball-shaped head having a locked condition with respect to the socket;
a neck;
the neck joining the body to the ball-shaped head;
a first compression screw;
a second compression screw;
the first compression screw and the second compression screw located on opposite sides of the socket;
wherein a combination of the first compression screw and the second compression screw determines whether the socket is in a compressed position or an uncompressed position; and
the plurality of rigid elements joined by the ball-shaped heads, allowing each element of the plurality of rigid elements to have six degrees of rotational freedom with respect to each other.
15. The device to bridge a bone fracture of a curved bone of claim 14 , wherein:
the first compression screw does not pass through the ball-shaped head, and the ball-shaped head is solid.
16. The device to bridge a bone fracture of a curved bone of claim 14 , wherein:
the socket is split by a compression gap;
the compression gap opening and closing depending upon whether the socket is in the compressed position or in the uncompressed position.
17. The device to bridge a bone fracture of a curved bone of claim 14 , further comprising:
a head plate;
the head plate including a socket, but lacking a ball;
the head plate for placement at a first end of the plurality of rigid elements.
18. The device to bridge a bone fracture of a curved bone of claim 14 , further comprising:
a tail plate;
the tail plate including a ball, but lacking a socket;
the tail plate for placement at a second end of the plurality of rigid elements.