CN201516081U - Internal fixing system of lumbar isthmus cleft restoration - Google Patents
Internal fixing system of lumbar isthmus cleft restoration Download PDFInfo
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- CN201516081U CN201516081U CN2009201208675U CN200920120867U CN201516081U CN 201516081 U CN201516081 U CN 201516081U CN 2009201208675 U CN2009201208675 U CN 2009201208675U CN 200920120867 U CN200920120867 U CN 200920120867U CN 201516081 U CN201516081 U CN 201516081U
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- screw
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- connecting rod
- hook
- internal fixation
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Abstract
An internal fixing system of lumbar isthmus cleft restoration comprises a vertebral pedicle screw nail implanted into a vertebral pedicle and a laminar hook which hooks the lower edge of a vertebral plate, wherein the vertebral pedicle screw nail is connected with the laminar hook through a cylindrical connecting rod, the head portion of the vertebral pedicle screw nail is provided with a U-shaped groove, the connecting rod is mounted in the U-shaped groove in sliding manner, inner threads are arranged on the top portion of the U-shaped groove, the U-shaped groove is connected with a plug screw of a fixing the connecting rod, the vertebral plate hook is fixedly connected onto the connecting rod through a locking board, the vertebral plate hook is arranged at one end of the connecting rod far away from the vertebral pedicle screw nail, the locking board is an expansion portion at the tail end of the connecting rod, and the vertebral plate hook, the locking board and the connecting rod are connected into a whole to form a restorer, the locking board is fixed onto the vertebral plate through a locking screw nail, and a locking hole matching with the locking screw nail is arranged on the locking board. The internal fixing system eliminates postoperative vertebral plate micro-motion, has high screw nail positioning precision and simple operation, keeps the motion segment of lumbar spines, and has high postoperative fracture end fusion ratio.
Description
Technical field
This utility model relates to a kind of lumbar spondylolysis restoration internal fixation system.
Technical background
Lumbar vertebral arch isthmus splits, and claims that also isthmus does not connect, spondyloschisis, and developmental character factor and alternate stress are modal reasons, also are one of common causes of low back pain.Patient's symptom, sign weight depend on type that age, isthmus do not connect, spinal instability situation, whether merge slippage and degree thereof etc.
Patients with spondylolysis is more common, and about 10% ~ 20% patient is invalid and need operative treatment through regular non-operative treatment.The intervertebral fusion art is to handle the most frequently used method of this type of patient.But will make the patient lose too much motion segment and motor function thus.
Nineteen sixty-eight, Kimura etc. initiate the fixed method of plaster bad behind simple isthmus or the damaged bone grafting prothesis of articular process, progressively occurred for out-of-bed activity as early as possible later on, recovered to use orthobiosis various internal fixation operations.Mainly contain following several mode at present:
1, isthmus screw fixation (BuckShi method) adds in the isthmus bone grafting with the screw that connects isthmus and fixes, and recovers the seriality of isthmus, helps bone-graft fusion.But because screw directly passes isthmus, the bone grafting amount that original elongated isthmus can be held obviously reduces, and influences bone-graft fusion; And lumbar vertebra that isthmus splits takes place how undesiredly grow, isthmus is tiny long and narrow, cause screw sometimes can't by or pass vertebral plate and enter canalis spinalis, cause horse hair or nerve root injury; And the screw positional accuracy requires high, and operation easier is big, operative failure rate height.
2, steel wire bundle method (Scott method) need to expose transverse process and wears around steel wire, and operation wound is big, complicated operation, hemorrhage many, danger that the injured nerve root is arranged; In addition, L5 transverse process front side cortex has a down dip forward, and the gap is narrower under the transverse process, wears around steel wire very difficult; And exposing the L5 transverse process also needs to cut off bone waist ligament, increases the weight of the L5 shakiness.Therefore, the steel wire bundle method should not be used for the L5 isthmus and splits.
3, hook screw fixation (Hook-Screw method), the hook screw fixation that Hefii in 1992 etc. at first propose to use the screw by the upper joint basilar part to be connected with vertebral lamina hook.Split slightly the cranium side at superior articular process's basilar part, isthmus and advance nail, the vertebral lamina hook hook can link to each other by connecting rod between the two in the lower edge with the sections vertebral plate, realizes pressurization by the screw of regulating on the connecting rod.Superior articular process's substrate screw is screwed into the degree of depth can not be dark excessively, otherwise easily enter intervertebral foramina, make screw strength limited, hold power in order to increase screw, many scholars replace interarticular screw with pedicle screw, the loyal grade of money improved on this basis, the single-unit section that the has designed lumbar spondylolisthesis fixed system that resets, it utilizes vertebral lamina hook to be stuck on the vertebral plate as fulcrum, when screwing the pedicle screw nut, produce the effect that lifts of pedicle screw, the reach vertebral body is resetted, the lumbar vertebra of slight slippage is had reset response.
But still there is following shortcoming in this fixation:
1) the screw positional accuracy requires height, and operation easier is big, the shortcoming that the operative failure rate is high.
2) and spondylolysis and spondylolithesis of the lumbar spine is fit to row " single vertebral body is fixed " operation, only be the early stage patient of disease, be generally teenager or youngster; Such patient's skeleton is incomplete development still, and vertebral body is more tiny.And the pedicle screw of hook screw fixation between vertebral lamina hook and the pitman, respectively needs an adapter with between the connecting rod respectively; Because the distance between vertebral plate and the pedicle of vertebral arch is extremely short, operation technique is inconvenience very; And promptly enable success and load onto two pieces of adapters, most of space that accounted for, no enough implant beds between pedicle of vertebral arch, isthmus, the vertebral plate easily cause operation to prove an abortion.
3) vertebral lamina hook only play a part the restriction vertebral plate slide backward downwards, be not " three-dimensional stability " system.The postoperative vertebral plate remain about, the fine motion of front and back even above-below direction.In case situations such as postoperative generation isthmus fracture end osteodystrophy, bone resorption, vertebral plate will further become flexible, final isthmus osteosclerosis, bone does not connect, operative failure.
4) vertebral lamina hook tension vertebral plate, the pressure that causes in the time of need bearing spinal motion, thus cause vertebral lamina hook wide and thick, cause iatrogenic lumbar spinal stenosis easily.
The utility model content
For overcoming the above-mentioned shortcoming of prior art, this utility model provides the fine motion of a kind of elimination postoperative vertebral plate, and screw positioning accuracy height is easy and simple to handle, keeps the lumbar vertebra motion segment, the lumbar spondylolysis restoration internal fixation system that postoperative fracture end fusion rate is high.
Lumbar spondylolysis restoration internal fixation system comprises the pedicle screw of implanting pedicle of vertebral arch and the vertebral lamina hook that hooks the vertebral plate lower edge, and described pedicle screw is connected with described vertebral lamina hook by a columniform connecting rod; The head of described pedicle screw is provided with U type groove, and described connecting rod is slidably mounted in the described U type groove, and described U type groove top is provided with female thread, and described U type groove is connected with the plug screw of a fixing described connecting rod;
It is characterized in that: described vertebral lamina hook is fixed on the described connecting rod by a lockplate, and described vertebral lamina hook is positioned at the end away from described pedicle screw of described connecting rod, and described connecting rod end expands and forms described lockplate; Described vertebral lamina hook, lockplate, connecting rod are connected as a single entity, and form positor; Described lockplate is fixed on the vertebral plate by lock screw, and described lockplate is provided with the lock hole that cooperates with described lock screw.
Further, described pedicle screw comprises shank of screw part and head of screw part, described shank of screw part partly is connected with described head of screw by universal joint, described U type groove is arranged on described head of screw part, described shank of screw partly is a hollow screw, is provided with the guid needle that can determine the implantation position of described pedicle screw in the described shank of screw.
Further, described lock screw is aimed at the bill of described vertebral lamina hook, has the gap between the nail point of described lock screw and the bill of described vertebral lamina hook.
Further, the top of described lock screw is provided with external screw thread, and described lock hole is provided with the female thread that meshes with the top of described lock screw.
Further, the gap between the bill of the nail of described lock screw point and described vertebral lamina hook is 2～3mm.
Further, described lockplate is rounded, and the diameter of described lockplate is 10mm, and thickness is 3mm; The diameter of described lock hole is 5mm.
Further, the width of described vertebral lamina hook is 5mm, and thickness is 2mm, and the degree of depth is 8mm, and the length of the neck of hook of described vertebral lamina hook is 12mm.
Further, the diameter of described lock screw is 3.5mm, and length is 12～14mm, and the diameter at the top of described lock screw is 5mm.
Further, the diameter of described pedicle screw is 4.5mm or 5.5mm or 6.3mm, and the length of described pedicle screw is 35mm or 40mm or 50mm; Described guid needle is that diameter is the Kirschner wire of 2mm.
Further, the diameter of described connecting rod is 5.5mm, and length is 20mm or 30mm or 40mm.
Technical conceive of the present utility model is: squeeze into guid needle in the operation earlier, after the position is satisfied, pedicle screw squeezed into along guid needle get final product, so not only can improve the accuracy rate of putting nail, the minimizing operate miss; And can carry out " Wicresoft " operation of little otch, reduce operation wound; Be convenient in addition with area of computer aided under navigation system adapt, guarantee success rate of operation.
Vertebral lamina hook, lockplate, connecting rod one, the top of lock screw is fixed on the described lockplate by screw thread, the fore-end of lock screw pierces in the vertebral plate, lock screw is used into angle stability internal fixation principle, effect with " inner fixed support ", good stability, and the pressure that causes during spinal motion concentrates on the lockplate, vertebral lamina hook need not too much stressed, thereby makes narrow and thin that vertebral lamina hook can do; Lock screw pierces vertebral plate, and directly fixing vertebral plate prevents fine motion, improves postoperative fracture end fusion rate; Because lock screw is bored " pushing " effect in the bone process, will lift vertebral lamina hook, vertebral lamina hook is closely pasted mutually with the vertebral plate inner panel, it is interior and tie up the canalis spinalis dischargeable capacity to prevent that vertebral lamina hook too much is absorbed in canalis spinalis, thereby prevents that postoperative from iatrogenic lumbar spinal stenosis taking place; Lock screw is taked to reach " nail-hook biting connecions " and design over against the diagonal at vertebral lamina hook tip trend, further fixing vertebral plate.
The utlity model has following advantage:
1, makes vertebral plate and vertebral body form the three-dimensional stability system, eliminate the fine motion and the shakiness of postoperative vertebral plate;
2, be confined to pathological changes vertebral body endomixis, fixing, and do not influence upper and lower vertebral body of disease vertebra and intervertebral disc, thereby keep the lumbar vertebra motion segment to greatest extent;
3, the implant bed that appears of postoperative pedicle of vertebral arch, isthmus, lamina surface is big, adds that vertebral plate is stable, does not have fine motion between the fracture end, postoperative fracture end fusion rate height.
Description of drawings
Fig. 1 is a sketch map of the present utility model
Fig. 2 is the sketch map of pedicle screw
Fig. 3 is the sketch map of positor
Fig. 4 is the sketch map of lock screw
Fig. 5 is positor, the bonded sketch map of lock screw
The specific embodiment
With reference to accompanying drawing, further specify this utility model:
Lumbar spondylolysis restoration internal fixation system comprises the pedicle screw 1 of implanting pedicle of vertebral arch and the vertebral lamina hook 2 that hooks the vertebral plate lower edge, and described pedicle screw 1 is connected with described vertebral lamina hook 2 by a columniform connecting rod 3; The head of described pedicle screw 1 is provided with U type groove 11, and described connecting rod 3 is slidably mounted in the described U type groove 11, and described U type groove 11 tops are provided with female thread, and described U type groove 11 is connected with the plug screw 12 of a fixing described connecting rod 3;
Described vertebral lamina hook 2 is fixed on the described connecting rod 3 by a lockplate 4, and described vertebral lamina hook 2 is positioned at the end away from described pedicle screw 1 of described connecting rod 3, and described lockplate 4 is the position of expanding of described connecting rod end; Described vertebral lamina hook 2, lockplate 4, connecting rod 3 are connected as a single entity, and form positor; Described lockplate 4 is fixed on the vertebral plate by lock screw 5, and described lockplate 4 is provided with the lock hole 41 that cooperates with described lock screw 5.
Described pedicle screw 1 comprises shank of screw part 13 and head of screw part 14, described shank of screw part 13 is connected with described head of screw part 14 by universal joint, described U type groove 11 is arranged on described head of screw part 14, described shank of screw part 13 is a hollow screw, is provided with the guid needle 15 of the implantation position that can determine described pedicle screw 1 in the described shank of screw 13.
Described lock screw 5 is aimed at the bill of described vertebral lamina hook 2, has the gap between the nail point of described lock screw 5 and the bill of described vertebral lamina hook 2.
The top of described lock screw 5 is provided with external screw thread, and described lock hole 41 is provided with the female thread that meshes with the top of described lock screw 5.
Gap between the nail point of described lock screw 5 and the bill of described vertebral lamina hook 2 is 2～3mm.
Described lockplate 4 is rounded, and the diameter of described lockplate 4 is 10mm, and thickness is 3mm; The diameter of described lock hole 41 is 5mm.
The width of described vertebral lamina hook 2 is 5mm, and thickness is 2mm, and the degree of depth is 8mm, and the length of the neck of hook of described vertebral lamina hook 2 is 12mm.
The diameter of described lock screw 5 is 3.5mm, and length is 12～14mm, and the diameter at the top of described lock screw 5 is 5mm.
The diameter of described pedicle screw 1 is 4.5mm or 5.5mm or 6.3mm, and the length of described pedicle screw 1 is 35mm or 40mm or 50mm; Described guid needle 15 is that diameter is the Kirschner wire of 2mm.
The diameter of described connecting rod 3 is 5.5mm, and length is 20mm or 30mm or 40mm.
Technical conceive of the present utility model is: squeeze into guid needle 15 in the operation earlier, after the position is satisfied, pedicle screw 1 squeezed into along guid needle 15 get final product, so not only can improve the accuracy rate of putting nail, the minimizing operate miss; And can carry out " Wicresoft " operation of little otch, reduce operation wound; Be convenient in addition with area of computer aided under navigation system adapt, guarantee success rate of operation.
The described content of this description embodiment only is enumerating the way of realization of utility model design; protection domain of the present utility model should not be regarded as only limiting to the concrete form that embodiment states, protection domain of the present utility model also reach in those skilled in the art according to this utility model design the equivalent technologies means that can expect.
Claims (10)
1. lumbar spondylolysis restoration internal fixation system comprises the pedicle screw of implanting pedicle of vertebral arch and the vertebral lamina hook that hooks the vertebral plate lower edge, and described pedicle screw is connected with described vertebral lamina hook by a columniform connecting rod; The head of described pedicle screw is provided with U type groove, and described connecting rod is slidably mounted in the described U type groove, and described U type groove top is provided with female thread, and described U type groove is connected with the plug screw of a fixing described connecting rod;
It is characterized in that: described vertebral lamina hook is fixed on the described connecting rod by a lockplate, and described vertebral lamina hook is positioned at the end away from described pedicle screw of described connecting rod, and described connecting rod end expands and forms described lockplate; Described vertebral lamina hook, lockplate, connecting rod are connected as a single entity, and form positor; Described lockplate is fixed on the vertebral plate by lock screw, and described lockplate is provided with the lock hole that cooperates with described lock screw.
2. lumbar spondylolysis restoration internal fixation system as claimed in claim 1, it is characterized in that: described pedicle screw comprises shank of screw part and head of screw part, described shank of screw part partly is connected with described head of screw by universal joint, and described U type groove is arranged on described head of screw part.
3. lumbar spondylolysis restoration internal fixation system as claimed in claim 2 is characterized in that: described shank of screw partly is hollow screw, is provided with the guid needle that can determine the implantation position of described pedicle screw in the described shank of screw.
4. lumbar spondylolysis restoration internal fixation system as claimed in claim 3 is characterized in that: described lock screw is aimed at the bill of described vertebral lamina hook, has the gap between the nail point of described lock screw and the bill of described vertebral lamina hook.
5. lumbar spondylolysis restoration internal fixation system as claimed in claim 4 is characterized in that: the top of described lock screw is provided with external screw thread, and described lock hole is provided with the female thread that meshes with the top of described lock screw.
6. lumbar spondylolysis restoration internal fixation system as claimed in claim 5 is characterized in that: the gap between the nail point of described lock screw and the bill of described vertebral lamina hook is 2～3mm; The diameter of described lock screw is 3.5mm, and length is 12～14mm, and the diameter at the top of described lock screw is 5mm.
7. lumbar spondylolysis restoration internal fixation system as claimed in claim 6 is characterized in that: described lockplate is rounded, and the diameter of described lockplate is 10mm, and thickness is 3mm; The diameter of described lock hole is 5mm.
8. lumbar spondylolysis restoration internal fixation system as claimed in claim 7 is characterized in that: the width of described vertebral lamina hook is 5mm, and thickness is 2mm, and the degree of depth is 8mm, and the length of the neck of hook of described vertebral lamina hook is 12mm.
9. lumbar spondylolysis restoration internal fixation system as claimed in claim 8, it is characterized in that: the diameter of described pedicle screw is 4.5mm or 5.5mm or 6.3mm, the length of described pedicle screw is 35mm or 40mm or 50mm, and described guid needle is that diameter is the Kirschner wire of 2mm.
10. lumbar spondylolysis restoration internal fixation system as claimed in claim 9 is characterized in that: the diameter of described connecting rod is 5.5mm, and length is 20mm or 30mm or 40mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201208675U CN201516081U (en) | 2009-05-27 | 2009-05-27 | Internal fixing system of lumbar isthmus cleft restoration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201208675U CN201516081U (en) | 2009-05-27 | 2009-05-27 | Internal fixing system of lumbar isthmus cleft restoration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201516081U true CN201516081U (en) | 2010-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201208675U Expired - Fee Related CN201516081U (en) | 2009-05-27 | 2009-05-27 | Internal fixing system of lumbar isthmus cleft restoration |
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| Country | Link |
|---|---|
| CN (1) | CN201516081U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102715943A (en) * | 2012-07-06 | 2012-10-10 | 常州市康辉医疗器械有限公司 | Dynamic repairing device for lumbar vertebra isthmus |
| CN104398298A (en) * | 2014-08-22 | 2015-03-11 | 曹相勋 | Minimally-invasive internal fixation device for acetabulum anterior column fracture |
| CN105708539A (en) * | 2014-08-11 | 2016-06-29 | 天津市康尔医疗器械有限公司 | Universal pedicle screw hook system |
| CN109009380A (en) * | 2018-06-26 | 2018-12-18 | 黄振强 | A kind of fixed device of Via Posterior Spinal Approach multiple spot |
| US10413334B2 (en) | 2014-05-27 | 2019-09-17 | DePuy Synthes Products, Inc. | Method and apparatus for spondylolysis repair |
-
2009
- 2009-05-27 CN CN2009201208675U patent/CN201516081U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102715943A (en) * | 2012-07-06 | 2012-10-10 | 常州市康辉医疗器械有限公司 | Dynamic repairing device for lumbar vertebra isthmus |
| US10413334B2 (en) | 2014-05-27 | 2019-09-17 | DePuy Synthes Products, Inc. | Method and apparatus for spondylolysis repair |
| CN105708539A (en) * | 2014-08-11 | 2016-06-29 | 天津市康尔医疗器械有限公司 | Universal pedicle screw hook system |
| CN104398298A (en) * | 2014-08-22 | 2015-03-11 | 曹相勋 | Minimally-invasive internal fixation device for acetabulum anterior column fracture |
| CN109009380A (en) * | 2018-06-26 | 2018-12-18 | 黄振强 | A kind of fixed device of Via Posterior Spinal Approach multiple spot |
| CN109009380B (en) * | 2018-06-26 | 2021-03-02 | 黄振强 | Spine posterior multi-point fixing device |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20100630 Termination date: 20110527 |