CA2669794A1 - Angle-adjustable bone screw and device for the osteosynthetic bone fixation - Google Patents
Angle-adjustable bone screw and device for the osteosynthetic bone fixation Download PDFInfo
- Publication number
- CA2669794A1 CA2669794A1 CA002669794A CA2669794A CA2669794A1 CA 2669794 A1 CA2669794 A1 CA 2669794A1 CA 002669794 A CA002669794 A CA 002669794A CA 2669794 A CA2669794 A CA 2669794A CA 2669794 A1 CA2669794 A1 CA 2669794A1
- Authority
- CA
- Canada
- Prior art keywords
- bone fixation
- fixation system
- head
- shank
- bone
- 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
Links
- 210000000988 bone and bone Anatomy 0.000 title claims abstract 34
- 230000001097 osteosynthetic effect Effects 0.000 title abstract 2
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- 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
- A61B17/8033—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers
- A61B17/8042—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers the additional component being a cover over the screw head
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
- A61B17/7037—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other wherein pivoting is blocked when the rod is clamped
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7032—Screws or hooks with U-shaped head or back through which longitudinal rods pass
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Neurology (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
- Prostheses (AREA)
Abstract
A bone screw (2; 14) with a screw shank (4; 21) to be anchored concentric to a longitudinal axis (5;
24) of the screw in a bone or bone part, and with a screw head (3; 22), characterized in that the bone screw (2; 14) has, between the screw head (3; 22) and the screw shank (4; 21), a disk-shaped collar (6; 23) which is concentric to the longitudinal axis (5; 24) of the screw and whose diameter is greater than the diameter of the screw shank (4; 21).
A device for osteosynthetic bone fixation with A) at least one such bone screw (2; 14); and B) at least one plate-shaped, prismatic or cylindrical fixation body (1; 15) which has at least one bore (7; 17) with a central axis (8; 16) for receiving the bone screw (2; 14), an underside (9; 19) toward the screw shank, and an upper side (11; 18) toward the screw head, C) the bore (7; 17) comprising a portion (10;
26) tapering toward the underside (9; 19), and D) the diameter d of the collar (6; 23) being dimensioned such that the collar (6; 23), in the concave portion (10; 26) of the bore (7; 17), can be made to bear on the wall (12; 27) of the bore (7; 17) at different angles between the longitudinal axis (5;
24) of the screw and the central axis (8; 16).
24) of the screw in a bone or bone part, and with a screw head (3; 22), characterized in that the bone screw (2; 14) has, between the screw head (3; 22) and the screw shank (4; 21), a disk-shaped collar (6; 23) which is concentric to the longitudinal axis (5; 24) of the screw and whose diameter is greater than the diameter of the screw shank (4; 21).
A device for osteosynthetic bone fixation with A) at least one such bone screw (2; 14); and B) at least one plate-shaped, prismatic or cylindrical fixation body (1; 15) which has at least one bore (7; 17) with a central axis (8; 16) for receiving the bone screw (2; 14), an underside (9; 19) toward the screw shank, and an upper side (11; 18) toward the screw head, C) the bore (7; 17) comprising a portion (10;
26) tapering toward the underside (9; 19), and D) the diameter d of the collar (6; 23) being dimensioned such that the collar (6; 23), in the concave portion (10; 26) of the bore (7; 17), can be made to bear on the wall (12; 27) of the bore (7; 17) at different angles between the longitudinal axis (5;
24) of the screw and the central axis (8; 16).
Claims (20)
1. A bone fixation system comprising:
a bone screw having a longitudinal axis, a head;
a shank;
a collar disposed between the head and shank and comprising a top portion and a plurality of lower portions, at least two adjacent lower portions forming at least one edge generally concentric to a longitudinal axis of the bone screw, wherein each edge is disposed along an imaginary convex surface that is generally spherical; and a receiving member comprising at least one bore having a longitudinal axis, the bore defining an inner surface having an upper portion and a lower generally spherical portion for contacting the imaginary convex surface for permitting the longitudinal axis of the bone screw to be angulated with respect to the longitudinal axis of the bore.
a bone screw having a longitudinal axis, a head;
a shank;
a collar disposed between the head and shank and comprising a top portion and a plurality of lower portions, at least two adjacent lower portions forming at least one edge generally concentric to a longitudinal axis of the bone screw, wherein each edge is disposed along an imaginary convex surface that is generally spherical; and a receiving member comprising at least one bore having a longitudinal axis, the bore defining an inner surface having an upper portion and a lower generally spherical portion for contacting the imaginary convex surface for permitting the longitudinal axis of the bone screw to be angulated with respect to the longitudinal axis of the bore.
2. The bone fixation system of claim 1, wherein the collar has two edges.
3. The bone fixation system of claim 2, wherein at least a portion of the head is substantially semispherical.
4. The bone fixation system of claim 3, wherein the head is integrally formed with the shank.
5. The bone fixation system of claim 3, wherein the head and shank are separately formed.
6. The bone fixation system of claim 5, wherein the head is releasably associated with the shank.
7. The bone fixation system of claim 5, wherein the head is threadably associated with the shank.
8. The bone fixation system of claim 5, wherein the head is connected to the shank by a conical peg that is received in a conical bore, with the conical peg and conical bore being disposed along the longitudinal axis.
9. The bone fixation system of claim 5, wherein the head is connected to the shank by a bayonet lock.
10. The bone fixation system of claim 3, wherein the head further comprises a zenith disposed on the longitudinal axis.
11. The bone fixation system of claim 1, wherein each edge has a diameter, and the diameters of the edges decrease as a function of increasing distance from the head.
12. The bone fixation system of claim 1, wherein the collar is disk-shaped.
13. The bone fixation system of claim 1, wherein the head is convex with respect to the shank.
14. The bone fixation system of claim 1, wherein each edge forms a generally circular shape having a diameter between about 4 mm and about 10 mm.
15. The bone fixation system of claim 1, wherein each edge forms a generally circular shape having a diameter between about 8 mm and about 10 mm.
16. The bone fixation system of claim 1, wherein the collar has a thickness defined between a top surface and a bottom surface between about 0.5 mm and about 2 mm.
17. The bone fixation system of claim 1, wherein the shank has an external diameter between about 3 mm and about 6 mm.
18. The bone fixation system of claim 1, wherein each edge forms a substantially circular shape.
19. The bone fixation system of claim 1, wherein each edge is substantially sharp.
20. A bone fixation assembly comprising;
a bone fastener comprising a head, a shank having threads to be anchored into bone, and a plurality of disk-shape collars, each collar having a top surface, a bottom surface and a lateral sidewall extending between the top surface and the bottom surface, the intersection of the lateral sidewall with the bottom surface forming a substantially sharp edge;
and a receiving member comprising at least one bore that defines an inner surface with a first cylindrical portion and a second non-cylindrical portion, wherein the diameters of the collars are sized and configured so that they decrease from the head to the shank so that the sharp edges of the collars form an imaginary convex surface, each of the sharp edges containing the second non-cylindrical portion.
a bone fastener comprising a head, a shank having threads to be anchored into bone, and a plurality of disk-shape collars, each collar having a top surface, a bottom surface and a lateral sidewall extending between the top surface and the bottom surface, the intersection of the lateral sidewall with the bottom surface forming a substantially sharp edge;
and a receiving member comprising at least one bore that defines an inner surface with a first cylindrical portion and a second non-cylindrical portion, wherein the diameters of the collars are sized and configured so that they decrease from the head to the shank so that the sharp edges of the collars form an imaginary convex surface, each of the sharp edges containing the second non-cylindrical portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2669794A CA2669794C (en) | 1999-07-07 | 1999-07-07 | Angle-adjustable bone screw and device for the osteosynthetic bone fixation |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002375533A CA2375533C (en) | 1999-07-07 | 1999-07-07 | Angle-adjustable bone screw and device for the osteosynthetic bone fixation |
| CA2669794A CA2669794C (en) | 1999-07-07 | 1999-07-07 | Angle-adjustable bone screw and device for the osteosynthetic bone fixation |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002375533A Division CA2375533C (en) | 1999-07-07 | 1999-07-07 | Angle-adjustable bone screw and device for the osteosynthetic bone fixation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2669794A1 true CA2669794A1 (en) | 2001-01-18 |
| CA2669794C CA2669794C (en) | 2011-08-30 |
Family
ID=41011939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2669794A Expired - Fee Related CA2669794C (en) | 1999-07-07 | 1999-07-07 | Angle-adjustable bone screw and device for the osteosynthetic bone fixation |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2669794C (en) |
-
1999
- 1999-07-07 CA CA2669794A patent/CA2669794C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2669794C (en) | 2011-08-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20170707 |
|
| MKLA | Lapsed |
Effective date: 20170707 |