CN103800064B - Double-locking type intramedullary nail structure - Google Patents
Double-locking type intramedullary nail structure Download PDFInfo
- Publication number
- CN103800064B CN103800064B CN201410028448.4A CN201410028448A CN103800064B CN 103800064 B CN103800064 B CN 103800064B CN 201410028448 A CN201410028448 A CN 201410028448A CN 103800064 B CN103800064 B CN 103800064B
- Authority
- CN
- China
- Prior art keywords
- screw
- hole
- nailing rod
- medullary nailing
- locking
- 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.)
- Expired - Fee Related
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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
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7233—Intramedullary pins, nails or other devices with special means of locking the nail to the bone
- A61B17/725—Intramedullary pins, nails or other devices with special means of locking the nail to the bone with locking pins or screws of special form
-
- 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
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7233—Intramedullary pins, nails or other devices with special means of locking the nail to the bone
- A61B17/7241—Intramedullary pins, nails or other devices with special means of locking the nail to the bone the nail having separate elements through which screws pass
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- 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 discloses a kind of double-locking type intramedullary nail structure, including a medullary nailing rod and for connecting the screw of fixing medullary nailing rod, be provided with the hole being connected with screw at medullary nailing rod near-end or far-end, the position in described hole arranges latch-up structure, for the shank of screw locking that will insert in hole.The double-locking type intramedullary nail structure of the present invention, operation in convenient operation, make screw be positioned at the one end outside long bone and can threaded locking with long bone, screw is positioned at the one end within long bone and can lock with medullary nailing rod, thus the double-locking realized between medullary nailing rod with screw is connected, avoid medullary nailing rod in long bone inside shaking or displacement, beneficially knitting.
Description
Technical field
The present invention relates to a kind of intramedullary nail structure, belong to technical field of medical instruments.
Background technology
Intramedullary nail is the medicine equipment of a kind of the more commonly used treatment fracture, belongs to the orthopedic fixation device tool in medicine equipment.Intramedullary nail is generally used for the interior fixing of the long bone fractures such as radius, humerus, femur, shin bone, the axial line of force of fracture site can be controlled, promote union, make the patient can out-of-bed activity as early as possible, relative low price is treated than general titanium alloy or pure titanium steel plate, intensity is high, is difficult to as steel plate fracture.
Intramedullary nail structure has medullary nailing rod, is provided with through hole at medullary nailing rod near-end or far-end.Screw one end is connected fixing by screw thread with long bone, and the screw other end may pass through through hole for positioning medullary nailing rod.Generally, the relatively shank of screw footpath that the through-hole diameter on medullary nailing rod is offered is bigger, in order to being placed in inside the long bone of fracture due to medullary nailing rod during operation, shank of screw is more easy to penetrate in medullary nailing rod.Due to the matched in clearance between through hole and shank of screw, make the connection between medullary nailing rod and screw cannot realize real locking, be easily generated and rock, thus cause fracture to produce the situations such as rotation deformity, affect knitting.
Summary of the invention
Goal of the invention:The technical problem to be solved is the defect overcoming prior art, a kind of double-locking type intramedullary nail structure is provided, realize screw to be positioned at the one end outside long bone and can threaded locking with long bone, screw is positioned at the one end within long bone and can lock with medullary nailing rod, thus realize double-locking, intramedullary nail position is made to fix, beneficially knitting.
Technical scheme:For solving above-mentioned technical problem, the present invention provides a kind of double-locking type intramedullary nail structure, including a medullary nailing rod and for connecting the screw of fixing medullary nailing rod, the hole being connected with screw it is provided with at medullary nailing rod near-end or far-end, it is characterized in that, the position in described hole arranges latch-up structure, for the shank of screw locking that will insert in hole.
Described latch-up structure is expansion type latch-up structure, including a tube expansion being placed on screw and a nut being connected with screw thread；
Tube expansion be shorter in length than shank of screw length, on shank of screw, at least end has screw thread, for being connected with nut thread；
Tube expansion one end has several roads opening, when the opening of tube expansion opens under nut spin effect, may be stuck in the hole of medullary nailing rod.
The screw being cased with tube expansion passes in the hole that long bone penetrates medullary nailing rod, and the bigger head of screw of screw stretches in medullary nailing rod, and one end of tube expansion opening is towards head of screw.
The plain washer with nut screw connection realization locking, can being placed on shank of screw and a spring pad can also be comprised.
Shank of screw is locked by the inserted link that latch-up structure is inserted into by medullary nailing rod position in aperture；
Inserted link wherein side arranges the draw-in groove corresponding with hole site, and card groove shape is identical towards the cross section in inserted link direction with the shank of screw inserted in hole.
Draw-in groove circumference is screwed draw-in groove or forms the semiorbicular elastic filling block of setting unit by draw-in groove, and the space that filling block surrounds engages with shank of screw interference.
Described latch-up structure is to be arranged on the screw thread of hole circumference or is an independent internal thread locking piece being placed in hole, and screw has the threaded rod matched, and screw is threadeded fixing with medullary nailing rod.
Screwed hole or the aperture of internal thread locking piece on medullary nailing rod are scaled to inner small and outside big bell mouth shape or stepped from inside to outside；Or, the diameter of shank of screw is tapered to the other end being connected with medullary nailing rod by the one end being connected with long bone or stepped attenuates.
Described latch-up structure is the filling block filled in the hole on medullary nailing rod.
Described filling block is metalwork, working of plastics or rubber parts.
Being provided with through hole on described filling block, the diameter of this through hole is less than the shank of screw footpath inserted, with the screw interference fit inserted.
Beneficial effect:The double-locking type intramedullary nail structure of the present invention, operation in convenient operation, make screw be positioned at the one end outside long bone and can threaded locking with long bone, screw is positioned at the one end within long bone and can lock with medullary nailing rod, thus the double-locking realized between medullary nailing rod with screw is connected, avoid medullary nailing rod in long bone inside shaking or displacement, beneficially knitting.
Accompanying drawing explanation
Fig. 1 is double-locking type intramedullary nail attachment structure schematic diagram；
Fig. 2 be Fig. 1 latch-up structure be enlarged drawing during filling block；
Fig. 3 be Fig. 1 latch-up structure be enlarged drawing during expansion type latch-up structure；
Fig. 4 be Fig. 1 latch-up structure be enlarged drawing during inserted link；
Fig. 5 be in Fig. 4 A to enlarged drawing.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.Following example are only used for clearly illustrating technical scheme, and can not limit the scope of the invention with this.
Embodiment 1
As it is shown in figure 1, the double-locking type intramedullary nail structure of the present invention includes that a medullary nailing rod 1 and is for connecting the screw 2 of fixing medullary nailing rod.Screw 2 has head of screw 21 and a shank of screw 22.Be provided with the hole 11 being connected with screw 2 at medullary nailing rod 1 near-end or far-end, the position in described hole arranges latch-up structure, for the shank of screw locking that will insert in hole.Screw 2 one end is connected fixing by screw thread with long bone 100, it is achieved locking, and the screw other end can pierce into inside long bone, arrives at medullary nailing rod, and can readily pierce in the hole on medullary nailing rod, latch-up structure locking connect, be fixed medullary nailing rod.
Latch-up structure can be various ways, during the most beneficially screw penetrates hole, can realize again the locking between screw and medullary nailing rod.
In the present embodiment latch-up structure can be the screw thread being arranged on hole 11 circumference, i.e. this hole be screwed hole, or be an independent internal thread locking piece being placed in hole 11, screw 2 also have the threaded rod 22 matched, screw 2 is threadeded fixing with medullary nailing rod 1.
By under long bone circumstance of occlusion, during screw 2 penetrates the hole 11 on medullary nailing rod 1 for convenience, the aperture of the screwed hole on medullary nailing rod 1 or screw fastening locking member can be scaled to inner small and outside big bell mouth shape or stepped from inside to outside.It is preferred that the diameter of shank of screw 22 is tapered to the other end being connected with medullary nailing rod by the one end being connected with long bone or stepped attenuates.
Embodiment 2
Latch-up structure in the present embodiment is to fill a filling block 3 in the hole 11 on medullary nailing rod 1, and metal, working of plastics or rubber parts as less in hardness, shown in Fig. 2, other are same as in Example 1.Filling block has less hardness and certain elasticity, it is easy to inserting screw 2 again can be to the screw parcel locking inserted.
It is preferred that be provided with through hole on filling block 3, the diameter of this through hole is slightly less than shank of screw 22 footpath of insertion, can be with screw 2 interference fit inserted, it is achieved screw 2 is connected fixing with the locking of medullary nailing rod 1.
Embodiment 3
Latch-up structure in the present embodiment is expansion type latch-up structure, and other are same as in Example 1.As it is shown on figure 3, expansion type latch-up structure includes the tube expansion 4 being placed on screw 2 and the nut 5 being connected with screw 2 threaded engagement.Tube expansion 4 be shorter in length than shank of screw 22 length, on shank of screw 22, at least end has screw thread.Tube expansion 4 one end has several roads opening 41.
The screw 2 being cased with tube expansion 4 passes in the hole that long bone penetrates medullary nailing rod, and the bigger head of screw 21 of screw 2 stretches in medullary nailing rod or through medullary nailing rod opposite side, one end of tube expansion opening is towards head of screw.The shank of screw being exposed to outside long bone is screwed on nut, under the spin effect of nut, head of screw is just brought in the tube expansion of opening, big for tube expansion punching, reaching the purpose expanded, the opening of tube expansion opens, and is stuck in the hole of medullary nailing rod or medullary nailing rod opposite side, achieve the interior locking of screw and medullary nailing rod, between shank of screw and nut, achieve outer locking.
It is preferred that on the shank of screw 22 being exposed to outside long bone first sheathed plain washer 6, spring pad 7, then nut of screwing on, coordinated with plain washer 6, spring pad 7 by nut 5, it is achieved lock outward.
In other embodiments, screw can also use bolt to replace.
Embodiment 4
Shown in Fig. 4, Fig. 5, the inserted link 8 that the latch-up structure in the present embodiment can also be inserted into by medullary nailing rod 1 position in aperture locks, and other are same as in Example 1.
Inserted link 8 can be cylindrical bar, it is also possible to for prism bar, it is also possible to for paddle shape bar.Inserted link space shared by medullary nailing rod is less than the half of medullary nailing rod inner space.
Inserted link 8 wherein side arranges the draw-in groove 81 corresponding with hole site, and draw-in groove 81 shape is identical towards the cross section in inserted link 8 direction with the shank of screw 22 inserted in hole.Screw 2 inserts the Kong Zhonghou of medullary nailing rod 1, inserts in medullary nailing rod 1 by inserted link 8 along medullary nailing rod side, then rotates and adjusts inserted link 8, make the draw-in groove 81 on inserted link 8 be stuck on shank of screw, screw is formed locking.
In other embodiments, latch-up structure in the present embodiment can also be with reference to embodiment 1 or embodiment 2, draw-in groove circumference is screwed draw-in groove or forms the semiorbicular filling block of setting unit by draw-in groove, and the space that semi-circular filling block surrounds engages with shank of screw interference, locks shank of screw.
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, on the premise of without departing from the technology of the present invention principle; can also make some improvement and deformation, these improve and deformation also should be regarded as protection scope of the present invention.
Claims (2)
1. a double-locking type intramedullary nail structure, including a medullary nailing rod and for connecting the screw of fixing medullary nailing rod, it is provided with the hole being connected with screw at medullary nailing rod near-end or far-end, it is characterized in that, in the aperture in described hole or hole, position arranges latch-up structure, for the shank of screw locking that will insert in hole；
Described latch-up structure is expansion type latch-up structure, including a tube expansion being placed on screw and a nut being connected with screw thread；Tube expansion be shorter in length than shank of screw length, on shank of screw, at least end has screw thread, for being connected with nut thread；Tube expansion one end has several roads opening, when the opening of tube expansion opens under nut spin effect, may be stuck in the hole of medullary nailing rod.
Double-locking type intramedullary nail structure the most according to claim 1, is characterized in that, the screw being cased with tube expansion passes in the hole that long bone penetrates medullary nailing rod, and the bigger head of screw of screw stretches in medullary nailing rod, and one end of tube expansion opening is towards head of screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410028448.4A CN103800064B (en) | 2014-01-22 | 2014-01-22 | Double-locking type intramedullary nail structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410028448.4A CN103800064B (en) | 2014-01-22 | 2014-01-22 | Double-locking type intramedullary nail structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103800064A CN103800064A (en) | 2014-05-21 |
| CN103800064B true CN103800064B (en) | 2016-08-17 |
Family
ID=50697789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410028448.4A Expired - Fee Related CN103800064B (en) | 2014-01-22 | 2014-01-22 | Double-locking type intramedullary nail structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN103800064B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016008062A1 (en) * | 2014-07-17 | 2016-01-21 | 唐佩福 | Device for fixing proximal humerus |
| CN104173099A (en) * | 2014-08-29 | 2014-12-03 | 南华大学 | Locking screw of minimally invasive lumbosacral vertebrae locking axial fusion internal fixation system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2404494Y (en) * | 1999-12-03 | 2000-11-08 | 徐州市第一人民医院 | Pressing and locking type intramedullary nail |
| CN1631326A (en) * | 2004-12-30 | 2005-06-29 | 潘滔 | Opening type intramedullary nail |
| CN201200469Y (en) * | 2008-04-28 | 2009-03-04 | 罗令 | Intramedullary nail with locking hole with inner screw thread |
| CN101828954A (en) * | 2010-04-01 | 2010-09-15 | 刘钦毅 | Stable locked intramedullary nail used for treating bone fracture |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202004014288U1 (en) * | 2004-09-15 | 2004-11-18 | Stryker Trauma Gmbh | Intra-medullary locking nail |
-
2014
- 2014-01-22 CN CN201410028448.4A patent/CN103800064B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2404494Y (en) * | 1999-12-03 | 2000-11-08 | 徐州市第一人民医院 | Pressing and locking type intramedullary nail |
| CN1631326A (en) * | 2004-12-30 | 2005-06-29 | 潘滔 | Opening type intramedullary nail |
| CN201200469Y (en) * | 2008-04-28 | 2009-03-04 | 罗令 | Intramedullary nail with locking hole with inner screw thread |
| CN101828954A (en) * | 2010-04-01 | 2010-09-15 | 刘钦毅 | Stable locked intramedullary nail used for treating bone fracture |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103800064A (en) | 2014-05-21 |
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Granted publication date: 20160817 Termination date: 20200122 |
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| CF01 | Termination of patent right due to non-payment of annual fee |