CN104382637A - Breakage-preventing external fixing support screw - Google Patents
Breakage-preventing external fixing support screw Download PDFInfo
- Publication number
- CN104382637A CN104382637A CN201410673320.3A CN201410673320A CN104382637A CN 104382637 A CN104382637 A CN 104382637A CN 201410673320 A CN201410673320 A CN 201410673320A CN 104382637 A CN104382637 A CN 104382637A
- Authority
- CN
- China
- Prior art keywords
- screw
- nail
- tail
- breakage
- 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.)
- 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
- A61B17/60—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 for external osteosynthesis, e.g. distractors, contractors
-
- 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
- A61B17/60—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 for external osteosynthesis, e.g. distractors, contractors
- A61B17/64—Devices extending alongside the bones to be positioned
- A61B17/6425—Devices extending alongside the bones to be positioned specially adapted to be fitted across a bone joint
-
- 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
- A61B17/60—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 for external osteosynthesis, e.g. distractors, contractors
- A61B2017/603—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 for external osteosynthesis, e.g. distractors, contractors with three points of contact, e.g. tripod
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Biomedical Technology (AREA)
- Engineering & Computer Science (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Heart & Thoracic Surgery (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)
Abstract
The invention belongs to the field of medical apparatuses and instruments. A breakage-preventing external fixing support screw is provided with a screw point (1) with a self-tapping groove, a length-fixed screw head portion (2) provided with threads, a screw rod (3) and a prism-shaped screw tail (4) and is characterized in that the screw point (1) can perform self tapping along a pre-drilled bone hole and guide the screw head portion (2) to be screwed into the bone, the diameter of the screw rod (3) is smaller than those of the screw head portion (2) and the screw tail (4), the connecting portion of the screw rod (3), the screw head portion (2) and the screw tail (4) forms a low-incisure transition, stress concentration at the connecting position can be eliminated, the screw tail (4) is prism-shaped and is conveniently connected with a bone drill firmly, the smaller-diameter screw rod is connected with the screw head tail in a low-incisure mode to form the working portion where the screw bears shear stress and deforms, and screw breakage due to the stress concentration is prevented. The breakage-preventing external fixing support screw has the advantages of being simple in structure, good in breakage-preventing effect and the like.
Description
Technical field
The invention belongs to medical instruments field, relate in Orthopedic Clinical the exterior fixation bracket hold-down screw having and prevent from rupturing, especially can concentrate for orthopedist to be provided in limbs weight training process not easily stress and the exterior fixation bracket hold-down screw that ruptures occurs.
Background technology
Exterior fixation bracket is the apparatus that treatment fracture is commonly used, the most screw for metal material of part that itself and bone directly contact or connect, and the basic structure form of screw can be divided into threadless stylus structure and threaded screw-type structure, and screw-type structure becomes the most frequently used form because it is combined firmly with sclerotin.The polygon staple tail that the exterior fixation bracket screw basic structure applied in current Orthopedic Clinical comprises threaded ailhead, columniform nail bar and can clamp for drill bit.Its mode entered in bone can be divided into screw-in type, in advance drilling self-tapping screw-in type, the self-drilling self-tapping screw-in type again of tapping in advance, and nail bar majority is cylindrical, follows closely tail and mostly is triangle, and minority is tetragon, hexagon, cylindrical.All exterior fixation bracket hold-down screw ailheads are all directly connected with nail rod-shape with the shape of ailhead with the connected mode of nail bar, due to the impact of nail head screw thread, both junction section are the stress concentration point of screw when bearing shearing force, are the main generation positions of screw extraction.Part exterior fixation bracket hold-down screw is designed to most advanced and sophisticated shorter screw thread, makes screw thread only be in offside sclerotin, and in nearside cortical bone is nail bar part, can reduce concentrating of stress, but causes the hold of ailhead not enough and easily loosen.Screw lost efficacy because hold deficiency loosens and screw extraction is the topmost reason of exterior fixation bracket fixation for treatment fracture inefficacy, was also the problem that Orthopedic Clinical needs to solve.
Summary of the invention
For solving above-mentioned technical deficiency, the invention provides a kind of anti-fracture exterior fixation bracket screw, this screw is by changing ailhead, nail bar, the diameter following closely tail and connected mode, the basis at utmost keeping screw hold eliminates the stress concentration point of three junction, screw is subject to the position distribution of shearing force generation deformation in longer nail bar, thus effectively eliminate stress and concentrate, avoid the fracture of screw.The technical scheme that the present invention solves is: a kind of anti-broken nail exterior fixation bracket screw, be provided with the nail head (2) that the nail tip (1) of band self tapping groove and threaded length are fixed, nail bar (3) and prismatoidal nail tail (4), it is characterized in that nail tip (1) can along the tapping guide nail head (2) to be screwed in bone voluntarily of pre-bore bone hole, nail bar (3) diameter is less than nail head (2) and nail tail (4), following closely bar (3) and nail head (2) and following closely tail (4) phase connection is divided into low incisura excessive, the stress can eliminating link position is concentrated, nail tail (4) is prismatic, conveniently firmly be connected with bone drill.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention.
The present invention is specifically described by embodiment below in conjunction with accompanying drawing.
Detailed description of the invention
Anti-fracture exterior fixation bracket screw is provided with the nail tip 1 of band self tapping groove and the fixing nail head 2 of threaded length, nail bar 3 and prismatoidal nail tail 4, it is characterized in that nail tip 1 can along the tapping guide nail head 2 to be screwed in bone voluntarily of pre-bore bone hole, nail bar 3 diameter is less than nail head 2 and nail tail 4, following closely bar 3 and nail head 2 and following closely tail 4 phase connection is divided into low incisura excessive, the stress can eliminating link position is concentrated, and nail tail 4 is prismatic, is conveniently firmly connected with bone drill.The nail bar utilizing diameter less adopts low incisura mode to be connected with ailhead tail, forms the working portion that screw bears shear stress generation deformation, prevents screw stress from concentrating fracture.
The present invention can reduce the fracture of exterior fixation bracket screw loosening, has structure simple, the advantage such as prevent screw extraction effective.
Claims (1)
1. an anti-fracture exterior fixation bracket screw, be provided with the nail head (2) that the nail tip (1) of band self tapping groove and threaded length are fixed, nail bar (3) and prismatoidal nail tail (4), it is characterized in that nail tip (1) can along the tapping guide nail head (2) to be screwed in bone voluntarily of pre-bore bone hole, nail bar (3) diameter is less than nail head (2) and nail tail (4), following closely bar (3) and nail head (2) and following closely tail (4) phase connection is divided into low incisura excessive, the stress can eliminating link position is concentrated, nail tail (4) is prismatic, conveniently firmly be connected with bone drill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410673320.3A CN104382637A (en) | 2014-11-21 | 2014-11-21 | Breakage-preventing external fixing support screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410673320.3A CN104382637A (en) | 2014-11-21 | 2014-11-21 | Breakage-preventing external fixing support screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104382637A true CN104382637A (en) | 2015-03-04 |
Family
ID=52600675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410673320.3A Pending CN104382637A (en) | 2014-11-21 | 2014-11-21 | Breakage-preventing external fixing support screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104382637A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2375260Y (en) * | 1999-02-25 | 2000-04-26 | 杨哲忠 | Intramedullary nail |
| CN2848152Y (en) * | 2005-08-25 | 2006-12-20 | 李全修 | Pulling pressurization screw |
| US20080234763A1 (en) * | 2007-03-16 | 2008-09-25 | Patterson Chad J | Surgical compression bone screw |
| US20100174323A1 (en) * | 2002-07-05 | 2010-07-08 | Newdeal S.A. | Self-boring and self-tapping screw for osteosynthesis and compression |
-
2014
- 2014-11-21 CN CN201410673320.3A patent/CN104382637A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2375260Y (en) * | 1999-02-25 | 2000-04-26 | 杨哲忠 | Intramedullary nail |
| US20100174323A1 (en) * | 2002-07-05 | 2010-07-08 | Newdeal S.A. | Self-boring and self-tapping screw for osteosynthesis and compression |
| CN2848152Y (en) * | 2005-08-25 | 2006-12-20 | 李全修 | Pulling pressurization screw |
| US20080234763A1 (en) * | 2007-03-16 | 2008-09-25 | Patterson Chad J | Surgical compression bone screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150304 |