IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0775074
(2010-05-20)
|
등록번호 |
US-8337535
(2012-12-25)
|
발명자
/ 주소 |
- White, Patrick M.
- Chenaux, Fabrice
- Merrette, Jean-Sebastien
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
12 인용 특허 :
5 |
초록
▼
The present invention relates to a bone plate designed to secure locking screws inserted into the plate at various angles. The interior wall surface of the plate apertures include a series of protruding threaded ridges interspaced by relief notches. The threaded ridges and intermediate relief notche
The present invention relates to a bone plate designed to secure locking screws inserted into the plate at various angles. The interior wall surface of the plate apertures include a series of protruding threaded ridges interspaced by relief notches. The threaded ridges and intermediate relief notches of the bone plate in combination with the threaded ridges and intermediate relief notches of the locking screw head allow the locking screw to bypass or “jump” threads of the bone plate. Thus, the locking screw can be inserted into the bone plate at a first angle and part-way through its advancement along the threads of the bone plate that angle can be changed. The second angle can either be greater than the first with respect to an orientation perpendicular to a longitudinal axis of the bone plate, or less than. This gives the physician a great amount of flexibility during a surgical procedure.
대표청구항
▼
1. A bone plate system, which comprises: a) an elongated plate having a longitudinal axis, a bone contacting bottom side, a topside, a thickness between the topside and the bottom side and at least one threaded screw aperture comprising plate threads, wherein the plate threads are provided with a fi
1. A bone plate system, which comprises: a) an elongated plate having a longitudinal axis, a bone contacting bottom side, a topside, a thickness between the topside and the bottom side and at least one threaded screw aperture comprising plate threads, wherein the plate threads are provided with a first pitch and comprise a first plurality of threaded columns separated by first intermediate relief notches;b) a screw comprising a shaft provided with shaft threads that are adapted to thread into a bone, the shaft supporting a head provided with screw head threads, wherein the screw head threads are provided with a pitch substantially matching the first pitch of the plate threads and comprise a second plurality of threaded columns separated by second intermediate relief notches; andc) wherein a width of each screw head thread comprising the second plurality of threaded columns of the screw head is wider than the width of the first intermediate relief notches of the plate, andd) wherein during use, the screw is threadable into a threaded engagement with the threaded aperture of the bone plate with the screw head threads being in a contact relationship with the plate threads at a first pitch and further wherein the screw is manipulatable by imparting a lateral force thereto to cause the screw to change its angle of inclination with respect to the plate from a first inclination to a second inclination when the screw head threads substantially reside in the first intermediate relief notches between adjacent first threaded columns so that the screw head threads are moved from being in a first threaded engagement with a first thread of the plate threads to subsequently being in a second threaded engagement with a second plate thread, the second plate thread being either one thread up or one thread down along the longitudinal axis of the at least one threaded screw aperture of the bone plate. 2. The bone plate system of claim 1 wherein the first plurality of threaded columns extend from adjacent the topside toward the bottom side of the bone plate. 3. The bone plate system of claim 1 wherein the second plurality of threaded columns extend substantially along a longitudinal axis of the screw. 4. The bone plate system of claim 1 wherein the at least one threaded screw aperture in the plate is sized to receive only one screw. 5. The bone plate system of claim 4 wherein the at least one threaded screw aperture in the plate is a complex aperture comprising first and second threaded apertures separated from each other by a relief zone. 6. The bone plate system of claim 4 wherein the at least one threaded screw aperture in the plate is a complex aperture extending through the plate thickness and comprised of at least two overlapping holes having an offset of a given distance between centers thereof, wherein any two immediately adjacent overlapping holes comprise a compression ramp extending from an oval shaped opening at the top side of the plate downwardly and inwardly part way through the plate thickness to a threaded lower portion having an hourglass shape extending from where the compression ramp ends at the hourglass shape to the bottom side of the bone plate with threaded surfaces of the overlapping holes meeting each other at a threaded overlap forming the hourglass shape, wherein the threaded lower portion of the complex aperture comprises the plate threads provided with the first pitch and comprising the first plurality of threaded columns separated by the first intermediate relief notches. 7. The bone plate system of claim 1 wherein the plate and screw are made from a biocompatible metal or polymer. 8. The bone plate system of claim 1 wherein the plate and screw are part of a kit. 9. The bone plate system of claim 8 wherein the kit includes both a locking screw and a compression screw. 10. The bone plate system of claim 1 wherein the plate threads extend through the thickness thereof. 11. The bone plate system of claim 6 wherein the complex aperture is adapted to lock with threads of the bone screw in one or the other of the overlapping holes. 12. A bone plate system, which comprises: a) an elongated plate having a longitudinal axis, a bone contacting bottom side, a topside, a thickness between the topside and the bottom side and at least one complex aperture extending through the plate thickness, the complex aperture comprised of at least two overlapping holes having an offset of a given distance between centers thereof, wherein any two immediately adjacent overlapping holes comprise a compression ramp extending from an oval shaped opening at the top side of the plate downwardly and inwardly part way through the plate thickness to a threaded lower portion having an hourglass shape extending from where the compression ramp ends at the hourglass shape to the bottom side of the bone plate with threaded surfaces of the overlapping holes meeting each other at a threaded overlap forming the hourglass shape, wherein the threaded lower portion of the complex aperture comprises plate threads provided with a first pitch and comprising a first plurality of threaded columns separated by first intermediate relief notches;b) a screw comprising a shaft provided with shaft threads that are adapted to thread into a bone, the shaft supporting a head provided with screw head threads, wherein the screw head threads are provided with a pitch substantially matching the first pitch of the plate threads and comprise a second plurality of threaded columns separated by second intermediate relief notches; andc) wherein a width of each screw head thread comprising the second plurality of threaded columns of the screw head is wider than the width of the first intermediate relief notches of the plate, andd) wherein during use, the screw is threadable into a threaded engagement with the threaded aperture of the bone plate with the screw head threads being in a contact relationship with the plate threads at a first pitch and further wherein the screw is manipulatable by imparting a lateral force thereto to cause the screw to change its angle of inclination with respect to the plate from a first inclination to a second inclination when the screw head threads substantially reside in the first intermediate relief notches between adjacent first threaded columns so that the screw head threads are moved from being in a first threaded engagement with a first thread of the plate threads to subsequently being in a second threaded engagement with a second plate thread, the second plate thread being either one thread up or one thread down along the longitudinal axis of the at least one threaded screw aperture of the bone plate. 13. The bone plate system of claim 12 wherein the complex aperture is adapted to lock with threads of the bone screw in one or the other of the overlapping holes. 14. A bone plate system, which comprises: a) an elongated plate having a longitudinal axis, a bone contacting bottom side, a topside, a thickness between the topside and the bottom side and at least one threaded screw aperture comprising plate threads, wherein the plate threads are provided with a first pitch and comprise a first plurality of threaded columns separated by first intermediate relief notches;b) a screw comprising a shaft provided with shaft threads that are adapted to thread into a bone, the shaft supporting a head provided with screw head threads, wherein the screw head threads are provided with a pitch substantially matching the first pitch of the plate threads and comprise a second plurality of threaded columns separated by second intermediate relief notches; andc) wherein a width of each screw head thread comprising the second plurality of threaded columns of the screw head is wider than the width of the first intermediate relief notches of the plate, andd) wherein during use, the screw is threadable into a threaded engagement with the threaded aperture of the bone plate with the screw head threads being in a contact relationship with the plate threads at a first pitch and further wherein the screw is manipulatable by imparting a lateral force thereto to cause the screw to change its angle of inclination with respect to the plate from a first inclination to a second inclination when the screw head threads substantially reside in the first intermediate relief notches between adjacent first threaded columns so that the screw head threads are moved from being in a first threaded engagement with a first thread of the plate threads to subsequently being in a second threaded engagement with a second plate thread, the second plate thread being either thread up or thread down along the longitudinal axis of the at least one threaded screw aperture of the bone plate. 15. The bone plate system of claim 1 wherein the width of each screw head thread comprising the second plurality of threaded columns of the screw is from 0.5 to 2 millimeters wider than the width of the first intermediate relief notches of the plate. 16. The bone plate system of claim 12 wherein the width of each screw head thread comprising the second plurality of threaded columns of the screw is from 0.5 to 2 millimeters wider than the width of the first intermediate relief notches of the plate. 17. The bone plate system of claim 14 wherein the width of each screw head thread comprising the second plurality of threaded columns of the screw is from 0.5 to 2 millimeters wider than the width of the first intermediate relief notches of the plate.
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