CA2626694A1 - Bone plate with conical screw threads - Google Patents

Bone plate with conical screw threads Download PDF

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Publication number
CA2626694A1
CA2626694A1 CA002626694A CA2626694A CA2626694A1 CA 2626694 A1 CA2626694 A1 CA 2626694A1 CA 002626694 A CA002626694 A CA 002626694A CA 2626694 A CA2626694 A CA 2626694A CA 2626694 A1 CA2626694 A1 CA 2626694A1
Authority
CA
Canada
Prior art keywords
type
hole
bone plate
plate
threaded portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002626694A
Other languages
French (fr)
Other versions
CA2626694C (en
Inventor
Michael Wagner
Robert Frigg
Robert Schavan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Synthes USA LLC
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Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4551663&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2626694(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of CA2626694A1 publication Critical patent/CA2626694A1/en
Application granted granted Critical
Publication of CA2626694C publication Critical patent/CA2626694C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8052—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
    • A61B17/8057—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded the interlocking form comprising a thread
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8004—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for distracting or compressing the bone or bones
    • A61B17/8014—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for distracting or compressing the bone or bones the extension or compression force being caused by interaction of the plate hole and the screws

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Neurology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
  • Prostheses (AREA)
  • Dowels (AREA)
  • Materials For Medical Uses (AREA)

Abstract

The inventive bone plate has a top surface (1), a bottom surface (2) for contact with the bone and several holes (4) which are situated along the longitudinal axis of the plate, connecting the top surface and the bottom surface (1, 2), for receiving bone screws (11). The diameter DL of at least one of these holes (4) is greater in the direction of the longitudinal axis of the plate (3) than the diameter DQ of said hole vertically in relation to the longitudinal axis of the plate (3). At least one of the holes (4) has an inner screw thread (5). This inner screw thread (5) tapers towards the bottom surface of the bone plate. The inventive bone plate can serve as a compression plate and as a so-called internal fixator at the same time, as effectively as if the two elements were separate.

Claims (52)

1. A bone plate having a longitudinal axis and comprising:
an upper surface;

a lower surface; and at least one first type of hole, the first type of hole being elongated and extending through the upper and lower surfaces, and having a central axis a longitudinal axis, wherein the first type of hole is at least partially threaded and the threaded portion of the hole tapers inward with respect to the central axis; and at least a second type of hole extending through the upper and lower surfaces, the second type of hole including an internal thread configured and dimensioned for engaging a threaded portion of a screw head.
2. The bone plate of claim 1, wherein the plate comprises a plurality of holes of the first type and a plurality of holes of the second type.
3. The bone plate of claim 2, wherein the plurality of holes of the first type are located closer to a first end of the plate and the plurality of holes of the second type are located closer to a second end of the plate.
4. The bone plate of claim 1, wherein the longitudinal axis of at least one of the first type of hole is substantially aligned with the longitudinal axis of the plate.
5. The bone plate of claim 1, wherein the second type of hole has an outer perimeter that is substantially circular.
6. The bone plate of claim 5, wherein the second type of hole is conically tapered inward from the upper surface towards the lower surface of the plate.
7. The bone plate of claim 6, wherein the second type of hole conically tapers at a cone angle of between about 5° and about 20°.
8. The bone plate of claim 5, further comprising at least a third type of hole extending through the upper and lower surfaces, wherein the third type of hole is substantially non-threaded.
9. The bone plate of claim 5, wherein a plurality of holes of the first type and at least one hole of the second type or third type is located closer to a first end of the plate and a plurality of holes of at least the second type are located closer to a second end of the plate.
10. The bone plate of claim 5, wherein the second type of hole has a first opening on the upper surface of the bone plate and a second opening on the bottom surface of the bone plate, and the first and second openings have substantially the same dimensions.
11. The bone plate of claim 10, further comprising at least a third type of hole extending through the upper and lower surfaces, wherein the third type of hole is substantially non-threaded.
12. The bone plate of claim 11, wherein a plurality of holes of the first type and at least one hole of the second type or third type is located closer to a first end of the plate and a plurality of holes of at least the second type are located closer to a second end of the plate.
13. The bone plate of claim 1, wherein the threaded portion of the first type of hole extends through an angle of between about 200° and about 250°
with respect to the central axis.
14. The bone plate of claim 1, wherein:
the threaded portion of the first type of hole extends through a first angle at the upper surface;

the threaded portion of the first type of hole extends through a second angle at the lower surface; and the first angle is larger than the second angle.
15. The bone plate of claim 14, wherein the first angle is between about 200° and about 270°, and the second angle is between about 180° and about 230°.
16. The bone plate of claim 1, wherein the first type of hole has first and second ends spaced apart along the longitudinal axis, and the threaded portion is disposed adjacent one of the ends.
17. The bone plate of claim 1, wherein the threaded portion of the first type of hole is located closer to a central portion of the bone plate than to an end portion of the bone plate.
18. The bone plate of claim 1, wherein the first type of hole has a non-threaded portion.
19. The bone plate of claim 18, wherein at least a portion of the non-threaded portion of the first type of hole tapers inward from the upper surface to the lower surface to form at least one ramp surface for engagement with a screw head.
20. The bone plate of claim 19, wherein the ramp surface is located on one end of the first type of hole to provide compression in a single direction.
21. The bone plate of claim 18, wherein the non-threaded portion of the first type of hole is configured and dimensioned to engage a substantially spherical screw head and provide compression of fractured bone fragments.
22. The bone plate of claim 21, further including a screw having a head, wherein the screw head is substantially smooth.
23. The bone plate of claim 21, further including a screw having a head, wherein the screw head is at least partially threaded.
24. The bone plate of claim 18, wherein the non-threaded portion of the first type of hole includes a concave recessed portion in the upper surface.
25. The bone plate of claim 24, wherein the recessed portion is substantially spherical.
26. The bone plate of claim 1, wherein:
the first type of hole has a first dimension on the lower surface that is substantially parallel to the longitudinal axis;
the first type of hole has a second dimension on the lower surface that is substantially perpendicular to the longitudinal axis; and the first dimension is between 1.1 and 3 times larger than the second dimension.
27. A bone plate having a longitudinal axis and comprising:
an upper surface;
a lower surface; and at least one first type of hole, the first type of hole being elongated and extending through the upper and lower surfaces, and having a central axis and a longitudinal axis, wherein the first type of hole is at least partially threaded and the threaded portion of the hole tapers inward with respect to the central axis; and at least a second type of hole extending through the upper and lower surfaces, wherein the second type of hole is substantially non-threaded.
28. The bone plate of claim 27, wherein the plate comprises a plurality of holes of the first type and a plurality of holes of the second type.
29. The bone plate of claim 28, wherein the plurality of holes of the first type are located closer to a first end of the plate and the plurality of holes of the second type are located closer to a second end of the plate.
30. The bone plate of claim 27, wherein the longitudinal axis of at least one of the first type of hole is substantially aligned with the longitudinal axis of the plate.
31. The bone plate of claim 27, wherein the second type of hole has an outer perimeter that is substantially circular.
32. The bone plate of claim 31, wherein the second type of hole is conically tapered inward from the upper surface towards the lower surface of the plate.
33. The bone plate of claim 32, wherein the second type of hole conically tapers at a cone angle of between about 5° and about 20°.
34. The bone plate of claim 33, further comprising at least a third type of hole extending through the upper and lower surfaces, wherein the third type of hole includes an internal thread configured and dimensioned for engaging a threaded portion of a screw head.
35. The bone plate of claim 34, wherein a plurality of holes of the first type and at least one hole of the second type or third type is located closer to a first end of the plate and a plurality of holes of at least the third type are located closer to a second end of the plate.
36. The bone plate of claim 31, wherein the second type of hole has a first opening on the upper surface of the bone plate and a second opening on the bottom surface of the bone plate, and the first and second openings have substantially the same dimensions.
37. The bone plate of claim 36, further comprising at least a third type of hole extending through the upper and lower surfaces, wherein the third type of hole includes an internal thread configured and dimensioned for engaging a threaded portion of a screw head.
38. The bone plate of claim 37, wherein a plurality of holes of the first type and at least one hole of the second type or third type is located closer to a first end of the plate and a plurality of holes of at least the third type are located closer to a second end of the plate.
39. The bone plate of claim 27, wherein the threaded portion of the first type of hole extends through an angle of between about 200° and about 250°
with respect to the central axis.
40. The bone plate of claim 27, wherein:
the threaded portion of the first type of hole extends through a first angle at the upper surface;
the threaded portion of the first type of hole extends through a second angle at the lower surface; and the first angle is larger than the second angle.
41. The bone plate of claim 40, wherein the first angle is between about 200° and about 270°, and the second angle is between about 180° and about 230°.
42. The bone plate of claim 27, wherein the first type of hole has first and second ends spaced apart along the longitudinal axis, and the threaded portion is disposed adjacent one of the ends.
43. The bone plate of claim 27, wherein the threaded portion of the first type of hole is located closer to a central portion of the bone plate than to an end portion of the bone plate.
44. The bone plate of claim 27, wherein the first type of hole has a non-threaded portion.
45. The bone plate of claim 44, wherein at least a portion of the non-threaded portion of the first type of hole tapers inward from the upper surface to the lower surface to form at least one ramp surface for engagement with a screw head.
46. The bone plate of claim 45, wherein the ramp surface is located on one end of the first type of hole to provide compression in a single direction.
47. The bone plate of claim 44, wherein the non-threaded portion of the first type of hole is configured and dimensioned to engage a substantially spherical screw head and provide compression of fractured bone fragments.
48. The bone plate of claim 47, further including a screw having a head, wherein the screw head is substantially smooth.
49. The bone plate of claim 47, further including a screw having a head, wherein the screw head is at least partially threaded.
50. The bone plate of claim 27, wherein the non-threaded portion of the first type of hole includes a concave recessed portion in the upper surface.
51. The bone plate of claim 50, wherein the recessed portion is substantially spherical.
52. The bone plate of claim 27, wherein:
the first type of hole has a first dimension on the lower surface that is substantially parallel to the longitudinal axis;
the first type of hole has a second dimension on the lower surface that is substantially perpendicular to the longitudinal axis; and the first dimension is between 1.1 and 3 times larger than the second dimension.
CA2626694A 1999-03-09 1999-03-09 Bone plate with conical screw threads Expired - Lifetime CA2626694C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/CH1999/000107 WO2000053111A1 (en) 1999-03-09 1999-03-09 Bone plate with conical screw threads
CA002367088A CA2367088C (en) 1999-03-09 1999-03-09 Bone plate with conical screw threads

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002367088A Division CA2367088C (en) 1999-03-09 1999-03-09 Bone plate with conical screw threads

Publications (2)

Publication Number Publication Date
CA2626694A1 true CA2626694A1 (en) 2000-09-14
CA2626694C CA2626694C (en) 2011-08-02

Family

ID=4551663

Family Applications (2)

Application Number Title Priority Date Filing Date
CA002367088A Expired - Lifetime CA2367088C (en) 1999-03-09 1999-03-09 Bone plate with conical screw threads
CA2626694A Expired - Lifetime CA2626694C (en) 1999-03-09 1999-03-09 Bone plate with conical screw threads

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CA002367088A Expired - Lifetime CA2367088C (en) 1999-03-09 1999-03-09 Bone plate with conical screw threads

Country Status (17)

Country Link
EP (1) EP1158916B1 (en)
JP (1) JP4276386B2 (en)
KR (1) KR100604451B1 (en)
CN (1) CN1149057C (en)
AT (1) ATE270526T1 (en)
AU (1) AU756798B2 (en)
CA (2) CA2367088C (en)
DE (1) DE59909921D1 (en)
DK (1) DK1158916T3 (en)
ES (1) ES2223163T3 (en)
HK (1) HK1039266B (en)
MY (1) MY125262A (en)
NZ (1) NZ513747A (en)
PT (1) PT1158916E (en)
TW (1) TW580379B (en)
WO (1) WO2000053111A1 (en)
ZA (1) ZA200001217B (en)

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US8870931B2 (en) 2007-03-21 2014-10-28 The University Of North Carolina At Chapel Hill Anti-unscrewing and multi-angular fastening apparatuses and methods for surgical bone screw/plate systems
US10772729B2 (en) 2012-08-23 2020-09-15 DePuy Synthes Products, Inc. Bone implant

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Publication number Priority date Publication date Assignee Title
US8870931B2 (en) 2007-03-21 2014-10-28 The University Of North Carolina At Chapel Hill Anti-unscrewing and multi-angular fastening apparatuses and methods for surgical bone screw/plate systems
US10772729B2 (en) 2012-08-23 2020-09-15 DePuy Synthes Products, Inc. Bone implant

Also Published As

Publication number Publication date
EP1158916B1 (en) 2004-07-07
HK1039266B (en) 2004-12-03
DE59909921D1 (en) 2004-08-12
PT1158916E (en) 2004-11-30
MY125262A (en) 2006-07-31
ZA200001217B (en) 2000-09-26
JP2003516167A (en) 2003-05-13
CA2367088A1 (en) 2000-09-14
ATE270526T1 (en) 2004-07-15
NZ513747A (en) 2002-12-20
JP4276386B2 (en) 2009-06-10
AU2607299A (en) 2000-09-28
CN1337864A (en) 2002-02-27
EP1158916A1 (en) 2001-12-05
KR20010108322A (en) 2001-12-07
AU756798B2 (en) 2003-01-23
TW580379B (en) 2004-03-21
ES2223163T3 (en) 2005-02-16
KR100604451B1 (en) 2006-07-26
WO2000053111A1 (en) 2000-09-14
HK1039266A1 (en) 2002-04-19
CA2367088C (en) 2008-07-15
DK1158916T3 (en) 2004-10-04
CA2626694C (en) 2011-08-02
CN1149057C (en) 2004-05-12

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