CN104921801A - Metal bone screw - Google Patents
Metal bone screw Download PDFInfo
- Publication number
- CN104921801A CN104921801A CN201510370209.1A CN201510370209A CN104921801A CN 104921801 A CN104921801 A CN 104921801A CN 201510370209 A CN201510370209 A CN 201510370209A CN 104921801 A CN104921801 A CN 104921801A
- Authority
- CN
- China
- Prior art keywords
- rivet nut
- segment
- screw
- screw body
- leading 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.)
- Pending
Links
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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
-
- 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
- A61B17/84—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, 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8625—Shanks, i.e. parts contacting bone tissue
- A61B17/863—Shanks, i.e. parts contacting bone tissue with thread interrupted or changing its form along shank, other than constant taper
-
- 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/869—Pins or screws or threaded wires; nuts therefor characterised by an open form, e.g. wire helix
-
- 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
- A61B17/84—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
- A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
- A61B17/8615—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver at the central region of the screw head
-
- 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/866—Material or manufacture
Abstract
The invention provides a metal bone screw, and belongs to the field of medical instruments used for the department of orthopaedics. The metal bone screw comprises a screw body and a screw head. The screw body is formed by a screw body front segment in a conical structure, a screw body middle segment, and a screw body rear segment. The junctions of the screw body front segment, the screw body middle segment, and the screw body rear segment are arc surfaces. The screw body rear segment is connected with the screw head. The taper angles of the screw body front segment, the screw body middle segment, and the screw body rear segment gradually reduce in sequence. The screw body front segment, the screw body middle segment, and the screw body rear segment are respectively provided with front segment threads, middle segment threads, and rear segment threads. The screw pitches of the front segment threads, the middle segment threads, and the rear segment threads reduce in sequence. The metal bone screw is simple in structure and reasonable in design. The structure of the screw body front segment, the screw body middle segment, and the screw body rear segment is used, and the taper angles and the screw pitches of the three segment structures are different. In fixation, the bone screw does not easily get loose, and fracture fixation reliability is high, and healing time of fracture is reduced. The metal bone screw is simple in operation and high in operation success rate.
Description
Technical field
The present invention relates to orthopaedics medical instruments field, specifically a kind of metal bone screw.
Background technology
In bone surgery, often need to utilize blade plate and bone screw to implement fixing to fracture site.The rivet nut major part of existing bone screw is screwed cylindrical or conical structure, easily bone screws loosen is there is in these bone screws when being fixed fracture site, reduce the reliability of fracture fixation, thus extend the healing time of fracture, the success rate of operation is lower.In order to solve the problem; also the structure of blade plate screw is become comparatively complicated by some; also the comparatively complicated bone screw of these structures usually can be used in the bone surgery of hospital to be coupled together by the bone fractureed; but baroque screw is not only not easy to install; nor easily unload, add operation easier.
Summary of the invention
The problem to be solved in the present invention is: overcome the deficiencies in the prior art, provides a kind of structure simple, reasonable in design, simple to operate, time fixing, bone screw not easily loosens, and the reliability of fracture fixation is high, decrease the healing time of fracture, the metal bone screw that the success rate of operation is high.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of metal bone screw, comprise rivet nut and ailhead, described rivet nut is by the rivet nut leading portion of pyramidal structure, rivet nut stage casing and rivet nut back segment are formed, described rivet nut leading portion, the junction of rivet nut stage casing and rivet nut back segment is arc surface, described rivet nut back segment is connected with ailhead, described rivet nut leading portion, the cone angle of rivet nut stage casing and rivet nut back segment reduces successively, described rivet nut leading portion, rivet nut stage casing and rivet nut back segment are respectively equipped with leading portion screw thread, mid-section threads and back segment screw thread, described leading portion screw thread, the pitch of mid-section threads and back segment screw thread reduces successively.
Further, described ailhead is spherical.
Further, the top center place of described ailhead has a groove.
Further, described groove is tetragon, hexagon, cross or quincunx.
Further, the cone angle of described rivet nut leading portion is 45-60 °.
Further, the cone angle in described rivet nut stage casing is 25-40 °.
Further, the cone angle of described rivet nut leading portion is 10-20 °.
Further, the material of described rivet nut and ailhead is Ti-6Al-4V, Ti-6Al-7Nb or 00Cr18Ni14Mo3.
The advantage that the present invention has and good effect are:
Structure of the present invention is simple, reasonable in design, adopt the structure of rivet nut leading portion, rivet nut stage casing and rivet nut back segment, and the cone angle of three-stage structure is different with pitch, time fixing, bone screw not easily loosens, and the reliability of fracture fixation is high, decreases the healing time of fracture, simple to operate, the success rate of operation is high.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment one.
Fig. 2 is the structural representation of the ailhead of embodiment one.
Fig. 3 is the structural representation of the ailhead of embodiment two.
Fig. 4 is the structural representation of the ailhead of embodiment three.
In figure: 1, rivet nut; 2, ailhead; 3, rivet nut leading portion; 4, rivet nut stage casing; 5, rivet nut back segment; 6, leading portion screw thread; 7, mid-section threads; 8, back segment screw thread; 9, groove.
Detailed description of the invention
Embodiment one
As Fig. 1, shown in 2, a kind of metal bone screw, comprise rivet nut 1 and spherical ailhead 2, the material of rivet nut 1 and ailhead 2 is Ti-6Al-4V, rivet nut 1 is by the rivet nut leading portion 3 of pyramidal structure, rivet nut stage casing 4 and rivet nut back segment 5 are formed, rivet nut leading portion 3, the junction of rivet nut stage casing 4 and rivet nut back segment 5 is arc surface, rivet nut back segment 5 is connected with ailhead 2, rivet nut leading portion 3, the cone angle of rivet nut stage casing 4 and rivet nut back segment 5 reduces successively, the cone angle of rivet nut leading portion 3 is 45 °, the cone angle in rivet nut stage casing 4 is 25 °, the cone angle of rivet nut leading portion 5 is 10 °, rivet nut leading portion 3, rivet nut stage casing 4 and rivet nut back segment 5 are respectively equipped with leading portion screw thread 6, mid-section threads 7 and back segment screw thread 8, leading portion screw thread 6, the pitch of mid-section threads 7 and back segment screw thread 8 reduces successively, the top center place of ailhead 2 has a hexagonal indentations 9.
The work process of the present embodiment: during use, the rivet nut front end 3 of rivet nut 1, rivet nut stage casing 4 and rivet nut rear end 5 are successively screwed in skeleton, because the cone angle of rivet nut leading portion 3, rivet nut stage casing 4 and rivet nut back segment 5 reduces successively, and the cone angle of three-stage structure is different with pitch, time fixing, bone screw not easily loosens, and the reliability of fracture fixation is high, decreases the healing time of fracture, simple to operate, the success rate of operation is high.
Embodiment two
As shown in Figure 3, a kind of metal bone screw, comprise rivet nut 1 and spherical ailhead 2, the material of rivet nut 1 and ailhead 2 is Ti-6Al-7Nb, rivet nut 1 is by the rivet nut leading portion 3 of pyramidal structure, rivet nut stage casing 4 and rivet nut back segment 5 are formed, rivet nut leading portion 3, the junction of rivet nut stage casing 4 and rivet nut back segment 5 is arc surface, rivet nut back segment 5 is connected with ailhead 2, rivet nut leading portion 3, the cone angle of rivet nut stage casing 4 and rivet nut back segment 5 reduces successively, the cone angle of rivet nut leading portion 3 is 50 °, the cone angle in rivet nut stage casing 4 is 30 °, the cone angle of rivet nut leading portion 5 is 15 °, rivet nut leading portion 3, rivet nut stage casing 4 and rivet nut back segment 5 are respectively equipped with leading portion screw thread 6, mid-section threads 7 and back segment screw thread 8, leading portion screw thread 6, the pitch of mid-section threads 7 and back segment screw thread 8 reduces successively, the top center place of ailhead 2 has a cross groove 9.
The work process of the present embodiment: with embodiment one.
Embodiment three
As shown in Figure 4, a kind of metal bone screw, comprise rivet nut 1 and spherical ailhead 2, the material of rivet nut 1 and ailhead 2 is 00Cr18Ni14Mo3, rivet nut 1 is by the rivet nut leading portion 3 of pyramidal structure, rivet nut stage casing 4 and rivet nut back segment 5 are formed, rivet nut leading portion 3, the junction of rivet nut stage casing 4 and rivet nut back segment 5 is arc surface, rivet nut back segment 5 is connected with ailhead 2, rivet nut leading portion 3, the cone angle of rivet nut stage casing 4 and rivet nut back segment 5 reduces successively, the cone angle of rivet nut leading portion 3 is 60 °, the cone angle in rivet nut stage casing 4 is 40 °, the cone angle of rivet nut leading portion 5 is 20 °, rivet nut leading portion 3, rivet nut stage casing 4 and rivet nut back segment 5 are respectively equipped with leading portion screw thread 6, mid-section threads 7 and back segment screw thread 8, leading portion screw thread 6, the pitch of mid-section threads 7 and back segment screw thread 8 reduces successively, the top center place of ailhead 2 has a tetragon groove 9.
The work process of the present embodiment: with embodiment one.
Above embodiments of the invention have been described in detail, but described content being only preferred embodiments of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.
Claims (8)
1. a metal bone screw, comprise rivet nut and ailhead, it is characterized in that: described rivet nut is made up of the rivet nut leading portion of pyramidal structure, rivet nut stage casing and rivet nut back segment, the junction of described rivet nut leading portion, rivet nut stage casing and rivet nut back segment is arc surface, described rivet nut back segment is connected with ailhead, the cone angle of described rivet nut leading portion, rivet nut stage casing and rivet nut back segment reduces successively, described rivet nut leading portion, rivet nut stage casing and rivet nut back segment are respectively equipped with leading portion screw thread, mid-section threads and back segment screw thread, the pitch of described leading portion screw thread, mid-section threads and back segment screw thread reduces successively.
2. a kind of metal bone screw according to claim 1, is characterized in that: described ailhead is spherical.
3. a kind of metal bone screw according to claim 1 and 2, is characterized in that: the top center place of described ailhead has a groove.
4. a kind of metal bone screw according to claim 3, is characterized in that: described groove is tetragon, hexagon, cross or quincunx.
5. a kind of metal bone screw according to claim 1, is characterized in that: the cone angle of described rivet nut leading portion is 45-60 °.
6. a kind of metal bone screw according to claim 1, is characterized in that: the cone angle in described rivet nut stage casing is 25-40 °.
7. a kind of metal bone screw according to claim 1, is characterized in that: the cone angle of described rivet nut leading portion is 10-20 °.
8. a kind of metal bone screw according to claim 1, is characterized in that: the material of described rivet nut and ailhead is Ti-6Al-4V, Ti-6Al-7Nb or 00Cr18Ni14Mo3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510370209.1A CN104921801A (en) | 2015-06-29 | 2015-06-29 | Metal bone screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510370209.1A CN104921801A (en) | 2015-06-29 | 2015-06-29 | Metal bone screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104921801A true CN104921801A (en) | 2015-09-23 |
Family
ID=54109479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510370209.1A Pending CN104921801A (en) | 2015-06-29 | 2015-06-29 | Metal bone screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104921801A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1455656A (en) * | 2000-09-11 | 2003-11-12 | 德普伊阿克罗麦德公司 | Method and implant for expanding spinal canal |
| CN1533262A (en) * | 2001-07-23 | 2004-09-29 | �ˡ����˶�������˹ | Modular acetabular cup |
| CN201197743Y (en) * | 2008-05-30 | 2009-02-25 | 王桂芝 | Anti-loose bone nail |
| JP2013181610A (en) * | 2012-03-02 | 2013-09-12 | Miyazaki Prefecture | Tapered screw for light softwood |
| CN204765888U (en) * | 2015-06-29 | 2015-11-18 | 北京贝思达生物技术有限公司 | Metal meets bone screw |
-
2015
- 2015-06-29 CN CN201510370209.1A patent/CN104921801A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1455656A (en) * | 2000-09-11 | 2003-11-12 | 德普伊阿克罗麦德公司 | Method and implant for expanding spinal canal |
| CN1533262A (en) * | 2001-07-23 | 2004-09-29 | �ˡ����˶�������˹ | Modular acetabular cup |
| CN201197743Y (en) * | 2008-05-30 | 2009-02-25 | 王桂芝 | Anti-loose bone nail |
| JP2013181610A (en) * | 2012-03-02 | 2013-09-12 | Miyazaki Prefecture | Tapered screw for light softwood |
| CN204765888U (en) * | 2015-06-29 | 2015-11-18 | 北京贝思达生物技术有限公司 | Metal meets bone screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150923 |