CN101972164A - Bone screw with high holding force (high bonding force) - Google Patents
Bone screw with high holding force (high bonding force) Download PDFInfo
- Publication number
- CN101972164A CN101972164A CN 201010548930 CN201010548930A CN101972164A CN 101972164 A CN101972164 A CN 101972164A CN 201010548930 CN201010548930 CN 201010548930 CN 201010548930 A CN201010548930 A CN 201010548930A CN 101972164 A CN101972164 A CN 101972164A
- Authority
- CN
- China
- Prior art keywords
- screw
- bone
- teeth
- shank
- force
- 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
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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
- A61B17/84—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
- A61B17/70—Spinal positioners or stabilisers ; Bone 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)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (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 relates to a bone screw, in particular to a bone screw with high holding force (high bonding force). The bone screw is characterized in that: threaded screw teeth on a screw rod are gradually thickened from the front end to the rear end of the screw rod. Because the screw teeth are gradually thickened from the front end to the rear end of the screw rod, after the bone screw is screwed into a human bone, any adjacent two circles of screw teeth from the front end to the rear end of the screw rod along the axis direction of the screw rod enlarge the extrusion force to the human bone tissue between the two circles of screw teeth circle by circle; therefore, the holding force (bonding force) between the outer threaded screw teeth on the screw rod and the inner threaded screw teeth on the human bone is enlarged at the same time of counteracting the extrusion force caused by abrasion of the inner threaded screw teeth formed on the human bone and between the inner threaded screw teeth and the outer threaded screw teeth on the screw rod, and failure modes of the conventional screw such as loosening, automatic withdrawing and even being extracted by an external force are thoroughly avoided.
Description
Technical field
The present invention is a kind of bone screw that is applied to medical industry orthopaedics consumptive material field, can be divided into bone screw that is used for human fracture position body internal fixation and the pedicle screw two big classes that are used for spinal column position body internal fixation, is specially adapted to osteoporotic bone injury patient.
Background technology
As everyone knows, screw is widely used in every field such as production, life as a kind of securing member, screw is made up of head of screw and shank of screw two parts, rounded or the hexagon of head of screw, when head of screw was rounded, its end face was provided with " one " font, " ten " font or " interior hexagonal " shape application of force groove, and shank of screw is connected with head of screw, shank of screw is provided with the thread that thread form is identical, pitch equates, the target that this screw is suitable for generally is inflexible metal.The bone screw that is used for medical industry orthopaedics consumptive material field at present also is the above-mentioned industrial screw designs of reference, promptly skeleton is equal to rigid material (as metal material) design, and skeleton has easy to wear and can produce the material behavior of strain under certain external force effect within the specific limits, has tangible different qualities with rigid material, therefore present bone screw is when carrying out the body internal fixation to human fracture position or spinal column position, a kind of comparatively common failure pattern is arranged, that is: bone screw in skeleton, be detained just take place after a period of time loosening, withdraw from voluntarily, even the situation of being extracted by external force, trace it to its cause, mainly being present this bone screw is all the rigid material design to skeleton etc., and do not consider that skeleton is easy to wear and under certain external force effect, can produce the material behavior of strain within the specific limits, when bone screw screws in skeleton, the initial segment of the female thread thread on the skeleton, owing to the screw-in through multiple tracks thread on the bone screw bar causes female thread thread that wearing and tearing make initial segment and the mutual extrusion power between the external screw thread thread on the bone screw bar to diminish to have reduced hold (adhesion) between bone screw and the skeleton, can take place to become flexible after a period of time thereby cause bone screw in skeleton, to be detained, withdraw from voluntarily, even the phenomenon of being extracted by external force and the causing failure of performing the operation.
Summary of the invention
The present invention is directed to hold (adhesion) deficiency that present medical industry orthopaedics consumptive material field bone screw exists, propose a kind of high hold (high-bond) screw that is applicable to skeleton (particularly sufferers of osteoporosis face skeleton).
The present invention can reach by following measure:
A kind of high hold (high-bond) bone screw comprises head of screw and shank of screw two parts, and the rear end of shank of screw is connected with head of screw, it is characterized in that keeping on the shank of screw thread pitch constant, and the thread tooth is thick to be increased from shank of screw front end to shank of screw rear end from coil to coil.
Use bone screw of the present invention because the tooth of shank of screw thread is thick in the end from coil to coil thickening backward of screw front end, just make bone screw after screwing in skeleton, shank of screw organizes from coil to coil to strengthen extruding force along two adjacent rings thread on the shank of screw axis direction to the skeleton between the two circle threads from front end to the back-end, when having offset extruding force between that the female thread thread that forms on the skeleton brings because of wearing and tearing and the shank of screw external screw thread thread and having reduced, increase on the shank of screw hold (adhesion) between the female thread thread on the external screw thread thread and skeleton, thereby thoroughly avoided the loosening of existing screw, withdraw from voluntarily, even the failure mode of being extracted by external force occurs.
Description of drawings.
Fig. 1 is the structural representation of the bone screw of application prior art.
Fig. 2 is the structural representation of the pedicle screw of application prior art.
Fig. 3 is the structural representation of the bone screw of application the art of this patent.
Fig. 4 is a vertebral pedicle bolt structure sketch map of using the art of this patent.
The specific embodiment.
Below in conjunction with accompanying drawing the present invention is further described.
A kind of high hold (high-bond) bone screw (dividing bone screw and pedicle screw two big classes), comprise head of screw 1 and shank of screw 2 two parts, the rear end of shank of screw 2 is connected with head of screw 1, and the pitch of thread 3 keeps P to remain unchanged on the shank of screw 2, and is above-mentioned same as the prior art.
The thick T of tooth that the invention is characterized in the thread 3 on the bone screw shank of screw 2 thickeies from shank of screw 2 front ends to rear end from coil to coil, because screw thread tooth is thick in the from coil to coil thickening to the back-end of screw front end, just make bone screw after screwing in skeleton, shank of screw organizes from coil to coil to strengthen extruding force to the rear end along any two adjacent rings thread on the shank of screw axis direction to the skeleton between the two circle threads from front end, when having offset extruding force between that the female thread thread that forms on the skeleton brings because of wearing and tearing and the shank of screw external screw thread thread and having reduced, increase the hold (adhesion) between the female thread thread that forms on the external screw thread thread and skeleton on the shank of screw, thereby thoroughly avoided the loosening of existing screw, withdraw from voluntarily, even the failure mode of being extracted by external force occurs.
Claims (1)
1. a high hold (high-bond) bone screw comprises head of screw and shank of screw, and the rear end of shank of screw is connected with head of screw, it is characterized in that thread pitch remains unchanged on the shank of screw, and screw thread thread tooth is thick to be thickeied gradually by shank of screw front end to shank of screw rear end.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105489302A CN101972164B (en) | 2010-11-18 | 2010-11-18 | Bone screw with high holding force and high bonding force |
| PCT/CN2011/074145 WO2012065412A1 (en) | 2010-11-18 | 2011-05-17 | Bone screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105489302A CN101972164B (en) | 2010-11-18 | 2010-11-18 | Bone screw with high holding force and high bonding force |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101972164A true CN101972164A (en) | 2011-02-16 |
| CN101972164B CN101972164B (en) | 2012-04-25 |
Family
ID=43572096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105489302A Expired - Fee Related CN101972164B (en) | 2010-11-18 | 2010-11-18 | Bone screw with high holding force and high bonding force |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101972164B (en) |
| WO (1) | WO2012065412A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012065412A1 (en) * | 2010-11-18 | 2012-05-24 | 孙正杰 | Bone screw |
| CN104398327A (en) * | 2014-12-18 | 2015-03-11 | 上海晟实医疗器械科技有限公司 | Locking screw provided with porous surface and used for bone connection and fixation |
| CN112752554A (en) * | 2018-09-26 | 2021-05-04 | 思百益股份有限公司 | Expandable and adjustable lordotic interbody fusion system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2402280Y (en) * | 1999-11-05 | 2000-10-25 | 苏继承 | Fixing compression screw for fracture |
| US20030007845A1 (en) * | 2001-07-05 | 2003-01-09 | Ejot Verbindungstechnik Gmbh & Co. Kg | Screw for screwing into a material of low strength |
| CN2788753Y (en) * | 2005-05-31 | 2006-06-21 | 杨立群 | Universal spinal column internal fixing system |
| CN101632601A (en) * | 2009-08-19 | 2010-01-27 | 雷伟 | Medical vertebral pedicle strengthening screw |
| CN201879816U (en) * | 2010-11-18 | 2011-06-29 | 刘忠军 | High-holding-force bone screw |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5871486A (en) * | 1993-01-21 | 1999-02-16 | Acumed, Inc. | Variable pitch bone screw |
| SE518461C2 (en) * | 2001-02-21 | 2002-10-15 | Henrik Hansson | Bone screw, way to make its threads and drill to drill holes for same |
| EP2175791A4 (en) * | 2007-03-23 | 2013-05-15 | Zbigniew Matulaniec | Bone screw apparatus and related methods of use |
| CN101972164B (en) * | 2010-11-18 | 2012-04-25 | 刘忠军 | Bone screw with high holding force and high bonding force |
-
2010
- 2010-11-18 CN CN2010105489302A patent/CN101972164B/en not_active Expired - Fee Related
-
2011
- 2011-05-17 WO PCT/CN2011/074145 patent/WO2012065412A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2402280Y (en) * | 1999-11-05 | 2000-10-25 | 苏继承 | Fixing compression screw for fracture |
| US20030007845A1 (en) * | 2001-07-05 | 2003-01-09 | Ejot Verbindungstechnik Gmbh & Co. Kg | Screw for screwing into a material of low strength |
| CN2788753Y (en) * | 2005-05-31 | 2006-06-21 | 杨立群 | Universal spinal column internal fixing system |
| CN101632601A (en) * | 2009-08-19 | 2010-01-27 | 雷伟 | Medical vertebral pedicle strengthening screw |
| CN201879816U (en) * | 2010-11-18 | 2011-06-29 | 刘忠军 | High-holding-force bone screw |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012065412A1 (en) * | 2010-11-18 | 2012-05-24 | 孙正杰 | Bone screw |
| CN104398327A (en) * | 2014-12-18 | 2015-03-11 | 上海晟实医疗器械科技有限公司 | Locking screw provided with porous surface and used for bone connection and fixation |
| CN112752554A (en) * | 2018-09-26 | 2021-05-04 | 思百益股份有限公司 | Expandable and adjustable lordotic interbody fusion system |
| CN112752554B (en) * | 2018-09-26 | 2024-04-12 | 阿德科尔股份有限公司 | Expandable and adjustable lordotic interbody fusion system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101972164B (en) | 2012-04-25 |
| WO2012065412A1 (en) | 2012-05-24 |
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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 | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120425 Termination date: 20121118 |