CN2601635Y - Screw-rod angle pedicle fixation device - Google Patents
Screw-rod angle pedicle fixation device Download PDFInfo
- Publication number
- CN2601635Y CN2601635Y CN 03220287 CN03220287U CN2601635Y CN 2601635 Y CN2601635 Y CN 2601635Y CN 03220287 CN03220287 CN 03220287 CN 03220287 U CN03220287 U CN 03220287U CN 2601635 Y CN2601635 Y CN 2601635Y
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- CN
- China
- Prior art keywords
- screw
- lateral mass
- pedicle
- connection
- rod
- 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 - Lifetime
Links
- 238000009434 installation Methods 0.000 claims abstract description 9
- 241000517325 Pediculus Species 0.000 abstract 7
- 230000003187 abdominal effect Effects 0.000 abstract 1
- 210000000988 bone and bone Anatomy 0.000 abstract 1
- 239000007943 implant Substances 0.000 description 5
- 239000011148 porous material Substances 0.000 description 4
- 230000000295 complement effect Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 206010023509 Kyphosis Diseases 0.000 description 2
- 210000000481 breast Anatomy 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000037081 physical activity Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
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- Surgical Instruments (AREA)
- Prostheses (AREA)
Abstract
The utility model provides a pediculus arcus vertebrae internal fixation device with a nail rodangle (APF system, screw-rodangle pedicle fixation system), which relates to a fixation device that is suitable for inner fixing of dorsal vertebra and abdominal vertebra. The utility model comprises a pediculus arcus vertebrae screw, a connection screw, a connection lateral mass and a screw nut. The connection lateral mass is arranged on both ends of the connection screw, and the pediculus arcus vertebrae screw is arranged inside the connection lateral mass; a cancellated bone spiral marking is arranged on the lower part of the pediculus arcus vertebrae screw, the upper part of the screw forms metuliform to the installation part of the connection lateral mass; the connection lateral mass is provided with an installation hole for pediculus arcus vertebrae screw, which is a conical hole, while the installation hole for connection screw is an oblate hole. The connection screw is in oblate shape, and complete spiral marking is arranged on the surface of the screw. The centrage of the installation hole for pediculus arcus vertebrae screw of the connection lateral mass offsets an angle of 0 to 15 degrees from the vertical plane of the connection screw hole. A globular screw nut is arranged on the inner wall of the junction of the connection screw and the connection lateral mass, while a fixing screw nut is arranged on the lateral wall. The upper part of the pediculus arcus vertebrae screw is fixed by a globular screw nut.
Description
Technical field
What the pedicle of vertebral arch inner fixer of this utility model band screw-rod angle (the Serew-rodangle pedicle fixation system of APF system) related to is a kind of breast, lumbar vertebra internal fixation of spine device of being applicable to.
Background technology
There is weak point in existing pedicle of vertebral arch inner fixer: the orientation angle instability of pedicle nail and connecting rod, loosening easily when physical activity, cause nail-bar connection and nail-bone interface easily loosening, make and fail to respond to any medical treatment, must carry out the operative treatment second time, bring misery to patient, increase surgery cost simultaneously.
Summary of the invention
The purpose of this utility model is to provide a kind of pedicle of vertebral arch inner fixer with screw-rod angle at above-mentioned weak point, adopt top to have the pedicle screw of tapering, oblate connecting screw rod, connect lateral mass, can effectively guarantee formed stable screw-rod angle behind implant into body, significantly reduced the screw rate that fractures, efficiently solved that nail-bar connects and nail-bone interface such as easily becomes flexible at complication.
The pedicle of vertebral arch inner fixer of band screw-rod angle takes following scheme to realize: the pedicle of vertebral arch inner fixer structure of band screw-rod angle comprises pedicle screw, connecting screw rod, connection lateral mass, nut.Connecting screw rod two end devices have the connection lateral mass, the pedicle screw device in connecting lateral mass, connecting screw rod be connected inboard, lateral mass junction and can spherical nut be arranged device, hold-down nut is equipped with in the outside.Pedicle screw top adopts spherical nut to fix.Cancellous threads is arranged at the pedicle screw bottom, and the core diameter of thread is tapered, strengthens gradually to the bottom of thread from the screw thread front portion, improve screw intensity, omoplate portion is hexagon, and screw top is with to be connected the lateral mass installation position tapered, the screw upper end is the standard machinery screw thread, is convenient to adopt nut to lock admittedly.
Connect lateral mass and have pedicle screw installing hole, connecting screw rod installing hole, pedicle screw installing hole face is a taper hole, taper hole centrage and connecting screw rod installing hole vertical angle α are 0 °～15 °, the connecting screw rod installing hole is a flat round hole, be complementary with the connecting screw rod cross section, play the antitorque usefulness that transfers to.On the pedicle screw installing hole that connects lateral mass, have spherical pore.Have spherical pore in the connecting screw rod installing hole inboard that connects lateral mass.Also can be processed with the inclined-plane, make above and below and pedicle screw centrage keep vertical in the pedicle screw installing hole above and below that connects lateral mass.It is oblate that connecting screw rod is, and there is full thread on the surface.
When the pedicle of vertebral arch inner fixer operation of band screw-rod angle was used, the complete use of pedicle of vertebral arch inner fixer with two same band screw-rod angles was installed in the human spine both sides respectively.During operation, pedicle of vertebral arch position with the upper and lower vertebral body of four pedicle screw implant into body breasts, lumbal vertebra vertebral body, to connect that lateral mass penetrates connecting screw rod and the nut of packing in the contiguous block both sides, to connect lateral mass again is enclosed within on the pedicle screw, on pedicle screw, install and fix nut screwing clamping, can use.
Key was screw-rod angle (screw-rodangle during the pedicle of vertebral arch inner fixer of band screw-rod angle resetted, SRA) maintenance stability requirement, this holder is owing to adopt pedicle screw, and connecting screw rod, connection lateral mass can effectively guarantee to form behind implant into body and stablize screw-rod angle.
The pedicle of vertebral arch inner fixer of band screw-rod angle has the characteristics of angle pedicle screw and locking screw in design, and frame for movement is simple but still have three-dimensional adjustability.
The pedicle of vertebral arch inner fixer of band screw-rod angle has pedicle screw, thread segment (nail portion) in design overall diameter is constant and interior diameter increases slightly tapered gradually, be that screw thread shoals gradually, make the intensity of whole screw be even increase to following closely omoplate portion from following closely point, avoid producing the gravitation concentration phenomenon, reduce the rate that fractures of screw; Nail omoplate portion profile is hexagon, hexagonal side fits like a glove with the step that is connected lateral mass, for avoiding screw generation transfer when twisting nail tail nut, solve the loosening problem of nail-bone interface, the lateral mass contact area of nail is smooth conical portion, the pedicle screw installing hole of the connection lateral mass that is complementary can be acute angle to the angle between the pedicle screw screw rod, kyphosis deformity form when meeting fracture, be convenient to the installation of interplantation connecting rod, when tightening screw afterbody nut, the big end in tapering progresses in the lateral mass hole, and combine closely, then screw-rod angle becomes the obtuse angle gradually, the needed screw-rod angle of resetting of preliminary election occurs, produces the rectification of satisfied kyphosis deformity; The screw hole of lateral mass is oblate and screw rod cross section coupling, and therefore, the pedicle of vertebral arch inner fixer of entire belt screw-rod angle is individual being rigidly connected.Prove that through biomechanics experiment its various parameters comprise that torsional strength all significantly surpasses normal spinal column specimen, has enough constant intensities.Has certain angle owing to connection lateral mass pedicle screw installation taper hole centrage is vertical with the connecting screw rod hole, the pedicle screw screw pierces certain implant angle that tilts to the midline, this implant angle is determined to be made by the preliminary election of human spine's normal physiological angle, can increase the bone-screw contact surface, the both sides screw is fixedly having a triangle angle of stability in the vertebra simultaneously, and produces skew nailing (toe-nailling) effect.
Description of drawings
The utility model is described in further detail below with reference to accompanying drawing.
Fig. 1 is the pedicle of vertebral arch inner fixer structural front view of band screw-rod angle.
Fig. 2 is the pedicle of vertebral arch inner fixer structure vertical view of band screw-rod angle.
Fig. 3 is the connection lateral mass sketch map of the pedicle of vertebral arch inner fixer of band screw-rod angle.
Fig. 4 is the connection lateral mass pedicle screw installing hole sketch map of the pedicle of vertebral arch inner fixer of band screw-rod angle.
Fig. 5 is the pedicle screw sketch map of the pedicle of vertebral arch inner fixer of band screw-rod angle.
The specific embodiment
With reference to accompanying drawing 1～5, the pedicle of vertebral arch inner fixer structure of band screw-rod angle comprises pedicle screw 1, connecting screw rod 4, connects lateral mass 6,8, nut.Connecting screw rod 4 two ends device respectively have the lateral mass of connection 6,8, two connection lateral mass to be symmetrical mounting.Two pedicle screws 1 install respectively in the pedicle screw installing hole 9 in connecting lateral mass 6,8, connecting screw rod 4 be connected inboard, lateral mass 6,8 junction and can spherical nut 7 be arranged device, hold-down nut 5 is equipped with in the outside.Pedicle screw top adopts spherical nut 3 fixing, and adds loading nut 2 lockings.Cancellous threads 14 is arranged at pedicle screw 1 bottom, and omoplate portion is hexagon 13, and screw thread top is with to be connected the lateral mass installation position tapered 12, and the screw upper end is a standard machinery screw thread 11, is convenient to adopt nut to lock (seeing accompanying drawing 5) admittedly.Connect lateral mass 6,8 and have pedicle screw installing hole 9, connecting screw rod installing hole 10, pedicle screw installing hole face 9 is a taper hole, taper hole centrage and connecting screw rod hole vertical angle α are 0 °～15 °, the optimum alpha angle is 0 °, 5 °, 10 °, 15 °, connecting screw rod installing hole 10 is a flat round hole, is complementary with the connecting screw rod cross section, plays the antitorque usefulness that transfers to.On the pedicle screw installing hole 9 that connects lateral mass 6,8, have spherical pore.Have spherical pore (seeing accompanying drawing 3,4) in connecting screw rod installing hole 10 inboards that connect lateral mass 6,8.Also can be processed with the inclined-plane, make above and below and pedicle screw centrage keep vertical in the pedicle screw installing hole above and below that connects lateral mass.It is oblate that connecting screw rod 4 is, and there is full thread on the surface.
Claims (4)
1, a kind of pedicle of vertebral arch inner fixer with screw-rod angle is characterized in that structure comprises pedicle screw, connecting screw rod, connection lateral mass, nut, and connecting screw rod two end devices have the connection lateral mass, and the pedicle screw device is in connecting lateral mass; Cancellous threads is arranged at the pedicle screw bottom, and screw top is with to be connected the lateral mass installation portion tapered; Connect lateral mass and have the pedicle screw installing hole, the pedicle screw installing hole is a taper hole, and the connecting screw rod installing hole is a flat round hole; It is oblate that connecting screw rod is, and there is full thread on the surface.
2, the pedicle of vertebral arch inner fixer of band screw-rod angle according to claim 1, the pedicle screw that it is characterized in that connecting lateral mass is installed by the taper hole centrage and connecting screw rod hole vertical angle α is 0 °～15 °.
3, the pedicle of vertebral arch inner fixer of band screw-rod angle according to claim 1 is characterized in that connecting screw rod and is connected the inboard device in lateral mass junction spherical nut is arranged that hold-down nut is equipped with in the outside, and pedicle screw top adopts spherical nut to fix.
4, the pedicle of vertebral arch inner fixer of band screw-rod angle according to claim 1 is characterized in that the pedicle screw installing hole above and below that connects lateral mass is processed with the inclined-plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03220287 CN2601635Y (en) | 2003-03-10 | 2003-03-10 | Screw-rod angle pedicle fixation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03220287 CN2601635Y (en) | 2003-03-10 | 2003-03-10 | Screw-rod angle pedicle fixation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2601635Y true CN2601635Y (en) | 2004-02-04 |
Family
ID=34161804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03220287 Expired - Lifetime CN2601635Y (en) | 2003-03-10 | 2003-03-10 | Screw-rod angle pedicle fixation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2601635Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101612054B (en) * | 2009-07-24 | 2011-01-05 | 王铁铸 | External-distraction pedicle screw-rod bracket of vertebral body |
| CN101389279B (en) * | 2004-06-17 | 2011-05-25 | 华沙整形外科股份有限公司 | Multi-axial bone attachment assembly |
| CN103519874A (en) * | 2013-10-22 | 2014-01-22 | 宋西正 | External fixing device for minimally invasive spine leverage reduction |
-
2003
- 2003-03-10 CN CN 03220287 patent/CN2601635Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101389279B (en) * | 2004-06-17 | 2011-05-25 | 华沙整形外科股份有限公司 | Multi-axial bone attachment assembly |
| CN101612054B (en) * | 2009-07-24 | 2011-01-05 | 王铁铸 | External-distraction pedicle screw-rod bracket of vertebral body |
| CN103519874A (en) * | 2013-10-22 | 2014-01-22 | 宋西正 | External fixing device for minimally invasive spine leverage reduction |
| CN103519874B (en) * | 2013-10-22 | 2017-02-08 | 宋西正 | External fixing device for minimally invasive spine leverage reduction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHANGZHOU CITY KANGHUI MEDICAL DEVICE CO., LTD. Free format text: FORMER OWNER: JIANG YIKANG Effective date: 20090605 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090605 Address after: No. 1-8, Tian Shan Road, Xinbei District, Jiangsu, Changzhou: 213022 Patentee after: Kanghui Medical Innovation Co., Ltd. Address before: Changzhou Kang Hui medical instruments Co., Ltd., 9 South cool road, Jiangsu, Changzhou 213004, China Patentee before: Jiang Yikang |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130310 Granted publication date: 20040204 |