Bibliographic Details
| Title: |
Intramedullary bone plate with sheath |
| Document Number: |
20070083202 |
| Publication Date: |
April 12, 2007 |
| Appl. No: |
11/231710 |
| Application Filed: |
September 20, 2005 |
| Abstract: |
An intramedullary bone plate with sheath having an intramedullary stem, a bone plate head and a neck that connects the intramedullary stem to the bone plate head in a manner where the stem and head are offset from each other longitudinally and axially in the sagittal plane. The bone plate head includes a sheath recess wherein non-threaded bone screw holes and a threaded sheath screw hole are located. Bone screws are inserted through the sheath recess and oriented at set angles allowing for bone fragment fixation and fracture reduction. A sheath element is placed within the boundaries of the sheath recess and secured with the sheath screw. The intramedullary stem includes longitudinal flutes in its distal portion and a bi-arced geometry in its proximal portion providing for stabilization of the implanted device. The bone plate head configuration provides for more complete fracture capture and multiple fixation modalities. |
| Inventors: |
Eli Running, Donald (Warsaw, IN, US); Ondrla, Jeffrey Michael (Leesburg, IN, US); Hunt, Thomas R. (Birmingham, AL, US); Churchill, R. Sean (Mequon, WI, US) |
| Claim: |
1. An intramedullary bone plate device, comprising: an intramedullary stem element configured to provide fixation within a medullary canal of a bone; a bone plate head element, wherein the bone plate head element is comprised of a medial-lateral width which is greater or equal to one-half the proximal-distal length of said bone plate head element; and a neck element fixed to an end of said intramedullary stem element and extending in an upward direction and fixed to one of at least the edge and bottom of said bone plate head element. |
| Claim: |
2. The intramedullary bone plate device of claim 1 wherein: the bone plate head element comprises a medial-lateral width which is greater or equal to the proximal-distal length of said bone plate head element. |
| Claim: |
3. The intramedullary bone plate device of claim 1 wherein: said bone plate head element comprises a lateral side and a medial side wherein said medial side has a downward angled and outward extending member. |
| Claim: |
4. The intramedullary bone plate device of claim 1 wherein: said bone plate head element having a medial side and said medial side comprises a downward angled and outward extending member and said member having at least two holes completely therethrough, and a longitudinal channel within the top surface of said member connecting said two holes. |
| Claim: |
5. The intramedullary bone plate device of claim 1 wherein: said top surface of said bone plate head element includes a sheath recess. |
| Claim: |
6. The intramedullary bone plate device of claim 1 wherein: said bone plate head element includes at least one completely therethrough hole. |
| Claim: |
7. The intramedullary bone plate device of claim 1 wherein: said bone plate head element includes a plurality of completely therethrough holes. |
| Claim: |
8. The intramedullary bone plate device of claim 5 wherein: said bone plate head element includes at least one completely therethrough hole located within the sheath recess. |
| Claim: |
9. The intramedullary bone plate device of claim 5 wherein: said bone plate head element includes a plurality of completely therethrough holes located within the sheath recess. |
| Claim: |
10. The intramedullary bone plate device of claim 9 wherein: said plurality of holes are longitudinally and laterally displaced within the sheath recess. |
| Claim: |
11. The intramedullary bone plate device of claim 9 wherein: said plurality of holes includes at least one hole completely therethrough with said hole centerline being about normal to a top surface of said sheath recess. |
| Claim: |
12. The intramedullary bone plate device of claim 9 wherein: said plurality of holes includes at least one hole completely therethrough with said hole centerline being angled to a top surface of said sheath recess. |
| Claim: |
13. The intramedullary bone plate device of claim 7 wherein: at least one of said plurality of holes has an oblique axis relative to the others. |
| Claim: |
14. The intramedullary bone plate device of claim 8 wherein: said bone plate head element includes at least one completely therethrough hole located within the sheath recess with a raised collar approximately concentric to said hole. |
| Claim: |
15. The intramedullary bone plate device of claim 9 wherein: at least one of said plurality of holes is at a fixed angle relative to the top surface of the sheath recess. |
| Claim: |
16. The intramedullary bone plate device of claim 9 wherein: at least one of said plurality of holes has a spherical concave cavity relative to the top surface of the sheath recess. |
| Claim: |
17. The intramedullary bone plate device of claim 9 wherein: at least one of said plurality of holes is set at a fixed angle relative to the sagittal plane and transverse plane. |
| Claim: |
18. The intramedullary bone plate device of claim 17 wherein: the angular orientation of a bone screw inserted in said holes is rigidly fixed in the sagittal plane and transverse plane. |
| Claim: |
19. The intramedullary bone plate device of claim 16 wherein: a bone screw inserted in said holes can pivot about 0 to 10 degrees relative to the transverse plane and about 0 to 20 degrees relative to the sagittal plane. |
| Claim: |
20. The intramedullary bone plate device of claim 1 further comprising: a sheath element, said sheath element being comprised of a top surface and bottom surface with at least one of two raised nobs and recesses fixed to said bottom surfaces; said sheath element being configured to attach to said bone plate element. |
| Claim: |
21. The intramedullary bone plate device of claim 20 wherein: said sheath element having at least one hole completely therethrough with the hole centerline being about normal to a top surface of said sheath element; said sheath element having a circular groove in the bottom surface of said sheath element with said circular groove being approximately concentric to the completely therethrough hole. |
| Claim: |
22. An intramedullary bone plate device, comprising: an intramedullary stem element, configured to provide fixative within a medullary canal of a bone; a bone plane head element, wherein the bone plate head element is comprised of a medial-lateral width which is greater or equal to one-half the proximal-distal length of said bone plate head element, wherein the top surface of said bone plate head element includes a sheath recess, wherein a plurality of completely therethrough holes are located; a neck element fixed to an end of said intramedullary stem element and extending in an upward direction and fixed to at least one of the edge and bottom of said bone plate element; and a sheath element, said sheath element being comprised of a top surface and bottom surface. |
| Claim: |
23. The intramedullary bone plate device of claim 22 wherein: said sheath element is configured to be fixed within the sheath recess. |
| Claim: |
24. The intramedullary bone plate device of claim 22 wherein: said sheath element is fixed within the sheath recess with a threaded screw. |
| Claim: |
25. The intramedullary bone plate device of claim 22 wherein: said sheath element covers said plurality of holes. |
| Claim: |
26. The intramedullary bone plate device of claim 22 further comprising: means for substantially inhibiting any movement of an inserted bone screw. |
| Claim: |
27. The intramedullary bone plate device of claim 26 wherein: said means for substantially inhibiting any movement of said inserted bone screw comprises a sheath element fixed to a sheath recess. |
| Claim: |
28. The intramedullary bone plate device of claim 1 wherein: said intramedullary stem element is comprised of a distal portion, a mid-shaft portion and a proximal portion. |
| Claim: |
29. The intramedullary bone plate device of claim 1 wherein: said intramedullary stem element is longitudinally displaced from said bone plate head element; and wherein said neck element connects the end of the distal portion of said intramedullary stem element to at least one of the edge and bottom of said bone plate head element forming an angle of ninety degrees or less. |
| Claim: |
30. The intramedullary bone plate device of claim 1 wherein: said intramedullary stem element is straight in the coronal plane; said bone plate head element has a convex top surface and concave bottom surface relative to the transverse plane. |
| Claim: |
31. The intramedullary bone plate device of claim 28 wherein: the distal portion and mid-shaft portion of said intramedullary stem element is straight in the sagittal plane and the proximal portion of said intramedullary stem element is curved in the sagittal plane. |
| Claim: |
32. The intramedullary bone plate device of claim 1 wherein: said intramedullary stem element is substantially circular in cross-section. |
| Claim: |
33. The intramedullary bone plate device of claim 28 wherein: the diameter of the proximal end of the distal portion tapers in the mid-shaft portion until said diameter matches the smaller diameter of the proximal portion of said intramedullary stem element. |
| Claim: |
34. The intramedullary bone plate device of claim 28 wherein: said intramedullary stem element is configured to provide fixation within a medullary canal of a bone, wherein the configuration is comprised of full circumference, longitudinal flutes extending from and including the distal portion to the mid-shaft portion. |
| Claim: |
35. A method of treating distal radius fractures and similar long bone fracture types with an intramedullary bone plate device comprising the steps of: providing an intramedullary bone plate device comprised of an intramedullary stem element, a bone plate head element, a sheath element and a neck element; inserting the intramedullary stem element into the medullary canal of the bone through an opening in the bone at the fracture site; seating the intramedullary stem element within the medullary canal; aligning the bone plate head element over the fracture site and the bone fragments; and affixing the bone plate head element to the bone. |
| Claim: |
36. A method of treating distal radius fractures and similar long bone fracture types with an intramedullary bone plate device of claim 35 further comprising steps of: reducing and buttressing the fracture; maintaining fracture reduction and drilling a plurality of holes, angular relative to each other into in at least one bone fragment through a plurality of therethrough holes in said bone plate element; screwing at least one bone screw into at least one bone fragment; and fixing the sheath element within a sheath recess, covering all inserted bone screws. |
| Current U.S. Class: |
606062/000 |
| Current International Class: |
61 |
| Accession Number: |
edspap.20070083202 |
| Database: |
USPTO Patent Applications |
