CN201101571Y - Internal fixation device for lumbar isthmus reestablishment - Google Patents
Internal fixation device for lumbar isthmus reestablishment Download PDFInfo
- Publication number
- CN201101571Y CN201101571Y CNU2007200972526U CN200720097252U CN201101571Y CN 201101571 Y CN201101571 Y CN 201101571Y CN U2007200972526 U CNU2007200972526 U CN U2007200972526U CN 200720097252 U CN200720097252 U CN 200720097252U CN 201101571 Y CN201101571 Y CN 201101571Y
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- hook
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- screw rod
- screw
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Abstract
The utility model discloses a lumbar isthmus restitution internal fixer which belongs to the internal fixer used for orthopaedics. The internal fixer comprises a screw, one end of which forms a screw thread part, and another screw thread part of one end of an L-shaped long pothook penetrates through a vertical through hole of the other end of the screw. The screw thread part of the screw penetrates through a horizontal through hole of the other end of a J-shaped short pothook, the long pothook screw thread parts at both sides of the vertical through hole and the screw thread parts of the screw at both sides of the horizontal through hole are respectively provided with positioning nuts, and the long pothooks of the screw are arranged oppositely to a hook part of the short pothook. The design of the internal fixer accords with the mechanics characteristics of the lumbar isthmus, has the advantages of little human body damage, little probability of nervous lesion, less bleeding, etc., does not destroy the original spine structure, and is convenient for operators to grasp operation skills, thus, the shortcomings existing in traditional operation methods are avoided. In the probation process of the internal fixer, no experimental animals have nervous lesion, and moreover, the safety of the internal fixer is approved.
Description
Technical field
This utility model relates to the orthopaedics inner fixer, specifically is that a kind of lumbar isthmus is rebuild inner fixer.
Background technology
The lumbar vertebra gorge does not connect and is meant that lumbar vertebral arch isthmus does not connect, and as individualism, claims to levy before the lumbar spondylolisthesis yet.Grown form that the lumbar vertebra gorge does not connect changes at isthmus, i.e. the narrowest place of vertebral arch, and one or both sides do not connect, and two parts before and after vertebrae is divided into, the former comprises vertebral body, pedicle of vertebral arch, transverse process and superior articular process, the latter comprises vertebral plate, inferior articular process and spinous process.
For the treatment that the lumbar vertebra gorge does not connect, be physiotherapy, minimizing sports and external fixation with usual employing expectant treatment relief of symptoms.
In recent years, the expert thinks both at home and abroad, does not connect for the lumbar vertebra gorge and answers the early operation treatment.The recent purpose of operation is thoroughly to cure chronic back pain, recovery motion (particularly teenager athlete).Its purpose at a specified future date is to keep the height of intervertebral disc, and the long-term unstable and intervertebral disc degeneration that causes of prevention lumbar vertebra, and intervertebral disk hernia that causes therefrom and spinal canal stenosis.Also can prevent the progress of slippage and the anatomical structure of recovery spinal column simultaneously effectively.From the angle thinking of biomechanics, the purpose of operative treatment is to recover the spinal column sequence and the line of force, and rebuilds the normal mechanics conduction mode of spinal column, and shearing is reduced to normal level, rebuilds spinal stability.
About the operative treatment that the lumbar vertebra gorge does not connect, its operation kind is more, and pluses and minuses are respectively arranged, and does not also have a kind of fixed operative model at present.But its final purpose is the gorge not to be connected reach bony union.
Spine, 1995, it is that the transverse process of doing this vertebra strode across the bone grafting operation of isthmus crack to vertebral plate, does not merge the joint after the excision gorge did not connect place's fiber callus for 20:2313. " the hook gorge does not connect original position bone grafting operation-vertebral plate transverse process bone grafting operation ".Though easy and simple to handle, the pseudarthrosis incidence rate is higher, is about 25%.Because of isthmus splits unresolvedly, unstable spine determining cause element and shearing still exist, and patient's symptom still exists.
JR Soc Med, 1991,84 (5): the disclosed Buck isthmus of 270-273. screw fixation is after place, isthmus crack excision fibrous tissue, makes progress outside process isthmus to this vertebra superior articular process from inferior articular process, be screwed into 1 piece of screw, isthmus is fixed and in the isthmus bone grafting.Although recover the seriality of isthmus, screw directly passes isthmus, and the bone grafting amount that elongated isthmus can be held obviously reduces, and influences bone-graft fusion.How bad the lumbar vertebra that does not connect patient because of the lumbar vertebra gorge grow again, and screw can't pass through sometimes, or pass vertebral plate and enter canalis spinalis injured nerve, spinal cord.
" JISUI ZAZHI AUTHOR AND ", 1999,9,376-378. transverse process spinous process steel wire bundle method is steel wire to be walked around transverse process and pass this vertebra spinous process, in the vertebral plate rear two ends pressurization tightened, and in place, isthmus crack bone grafting.The popular abroad more than ten years of this operation also constantly improve, but because of its operation wound is big, steel wire has the danger of injured nerve root when twining transverse process.Steel wire is difficult to sometimes to shearing resistance in addition, and causes bone grafting not merge, even steel wire fracture.
" JISUI ZAZHI AUTHOR AND ", 1999,9,324-327. memorial alloy holder sections internal fixation (IMAF),, this memorial alloy holder is the clamp of receiving in the semicircular two ends, only is used for the experiment of lumbar vertebra specimen at present.
J spinal Disord, 1999,12 (5): 363-367. pedicle screw technology, comparatively in vogue at home and abroad at present, but designed pedicle screw type is also more.Data shows, though pedicle nail be at present both at home and abroad treatment lumbar vertebra gorge do not connect most widely used technology, its recent complication is for infecting and the pedicle nail symptom that root causes that excites nerve; Long term complication is the symptom that does not merge at bone grafting place, isthmus crack, pedicle nail loosening, folding is followed closely disconnected rod and bone grafting place, isthmus crack hypertrophy pressuring nerve is produced.
Summary of the invention
This utility model is exactly in order to solve in the existing lumbar isthmus reconstruction technique, do not connect original position bone graft fusion, Buck isthmus screw fixation, transverse process spinous process steel wire bundle method, memorial alloy holder sections internal fixation and pedicle screw technology as the gorge, the fusion rate of bone graft of Cun Zaiing is low respectively, the probability of nerve injury is big, internal fixation is not strong, operation wound is big, broken lepospondylous nut original structure in the art, and when performing a surgical operation, to the technical equipment of patient and hospital problems such as have relatively high expectations.And provide a kind of lumbar isthmus to rebuild inner fixer.
This utility model is realized by following technical scheme.
A kind of lumbar isthmus is rebuild inner fixer, comprises that an end forms the screw rod of threaded portion, and is penetrated with the threaded portion of the long hook of " L " shape one end in the vertical through-via of the screw rod other end; The horizontal through hole of the short hook of " L " shape other end is run through in screw flight portion, and in the long hook threaded portion of vertical through-via both sides with at the setscrew nut that is respectively equipped with of the screw flight portion of horizontal through hole both sides, the hook portion of the long hook of screw rod and short hook in opposite directions.
She Ji this utility model design science, reasonable meets the lumbar isthmus mechanics feature like this; Little to injury of human, do not destroy the spinal column original structure, the nervous lesion probability is little; Go out insufficiency of blood; Be convenient to the patient and grasp characteristics such as operation skill.Thereby avoided the existing shortcoming of traditional surgical approaches,, nerve injury probability low as fusion rate of bone graft is big, internal fixation is not strong, operation wound is big, destroy the pedicle of vertebral arch original structure, require too high to the technical equipment of patient and hospital.
In this utility model process on probation, nervous lesion appears in none routine laboratory animal, has more confirmed the safety of this internal fixation.
Description of drawings
Fig. 1 is this utility model planar structure sketch map;
Fig. 2 is this utility model decomposition texture sketch map.
Among the figure: 1. screw rod 2. nuts
3. screw rod rectangle head 4. rectangular blocks
5. vertical through-via 6. weak points are linked up with
7. screw rod length is linked up with 8. horizontal through holes
9. long hook vertical component effect 10. short hook vertical component effects
11. long hook portion 12. short hook portions
13.14. threaded portion
The specific embodiment
Below in conjunction with drawings and Examples this utility model is described in detail.
A kind of lumbar isthmus is rebuild inner fixer, comprises that an end forms the screw rod 1 of threaded portion 13, and is penetrated with the threaded portion 14 of the long hook of " L " shape screw rod 7 one ends in the vertical through-via 5 of screw rod 1 other end; The horizontal through hole 8 of the short hook of " J " shape 6 other ends is run through in the threaded portion 13 of screw rod 1, be respectively equipped with setscrew nut 2 in the threaded portion 14 of the long hook 7 of vertical through-via 5 both sides screw rods with in the threaded portion 13 of horizontal through hole 8 both sides screw rods 1, the hook portion of long hook 7 of screw rod and short hook 6 in opposite directions.
Described lumbar isthmus is rebuild inner fixer, and its vertical through-via 5 is formed in the screw rod rectangle head 3 on the same centrage of screw rod 1 other end.
Described lumbar isthmus is rebuild inner fixer, and the short hook vertical component effect 10 of the short hook 6 of its " J " shape is columns, and the one end is the rectangular block 4 that vertically connects and be formed with horizontal through hole 8 with it, the short hook portion 12 of the integrally formed bend in one direction of the other end.
Described lumbar isthmus is rebuild inner fixer, and the long hook 7 of its " L " shape screw rod is by the integrally formed threaded portion 14 of long hook vertical component effect 9 one ends, and the long hook portion 11 of the integrally formed bend in one direction of the other end constitutes.
Described lumbar isthmus is rebuild inner fixer, the unidirectional long hook portion 11 long 6-8mm of the long hook 7 of the screw rod of its " L " shape, and wide 5mm, and be 80 with long hook vertical component effect 9 and spend angular distortions.
Described lumbar isthmus is rebuild inner fixer, the unidirectional short hook portion 12 long 4-6mm of its short hook 6, and wide 4-6mm is 60-80 degree angular distortion with short hook vertical component effect 10.
Described lumbar isthmus is rebuild inner fixer, and its screw rod 1, nut 2, the long hook 7 of screw rod, short hook 6 adopt rustless steel to make.
Long hook portion 11 and short hook portion 12 are flat hooks of interior receipts that certain radian is arranged, and avoid hook firmly to skid.
During use, the long hook of screw rod 7 can pass through screw rod 1 top by vertical through-via 5, and be that the center of circle is carried out 360 degree and rotated with vertical through-via 5, and short hook can the 13 rotation liftings along the threaded portion.Each is regulated the long hook 7 of screw rod, short hook 6 by its two end nut 2, and long hook portion 11 and short hook portion 12 correspondence are to the inside determined corresponding angle in opposite directions separately.The long hook 7 of screw rod is used to tangle the transverse process of disease vertebra, the long hook portion 11 long 6-8mm of the long hook 7 of screw rod, and wide 5mm is 80 degree angles with long hook vertical component effect 9.The short hook portion 6 of short hook 6 is used to tangle the vertebral plate of disease vertebra, the short minister 4-6mm that hangs, and wide 4-6mm is 60-80 degree angle with short hook vertical component effect.By the nut 2 in the tie down screw portion 13,14 power between two hooks is increased, thereby reach the bony union that the gorge does not connect.
This utility model is installed on the animal model that the spinal column gorge do not connect, and analyzes by radiology, biomechanics, histology.Zoopery shows that the fusion rate of every index (iconography, topology, histology) of internal fixation bone grafting group is 100%, and apparently higher than matched group, and the impassivity damage takes place.Biomechanics experiment confirms that this inner fixer adopts coupling type to connect the traction pressue device, run through structure and be different from the most pinning formula internal fixation that adopts of existing Chinese scholars, dual mechanics effect with tangible voltage stabilizing and pressurization has confirmed the probability and the using value of this utility model clinical practice.
Claims (7)
1. a lumbar isthmus is rebuild inner fixer, comprises that an end forms the screw rod of threaded portion, the threaded portion of the long hook of shape screw rod one end that it is characterized in that the vertical through-via of the screw rod other end is penetrated with " L "; The short horizontal through hole of linking up with the other end of " J " shape is run through in screw flight portion, is provided with setscrew nut respectively in the threaded portion of the long hook of vertical through-via both sides screw rod with in horizontal through hole both sides screw flight portion, and the hook portion of long hook of screw rod and short hook in opposite directions.
2. lumbar isthmus according to claim 1 is rebuild inner fixer, it is characterized in that vertical through-via is formed in the screw rod rectangle head on the same centrage of the screw rod other end.
3. lumbar isthmus according to claim 1 is rebuild inner fixer, the short hook vertical component effect that it is characterized in that the short hook of " J " shape is a column, the one end is the rectangular block that vertically connects and be formed with horizontal through hole with it, the short hook portion of the integrally formed bend in one direction of the other end.
4. lumbar isthmus according to claim 1 is rebuild inner fixer, it is characterized in that the long hook of " L " shape screw rod by the integrally formed threaded portion of long hook vertical component effect one end, and the long hook portion of the integrally formed bend in one direction of the other end constitutes.
5. lumbar isthmus according to claim 1 is rebuild inner fixer, it is characterized in that the long 6-8mm of the long unidirectional long hook portion of hook of screw rod of " L " shape, wide 5mm, and be 80 with vertical component effect and spend angular distortions.
6. lumbar isthmus according to claim 1 is rebuild inner fixer, it is characterized in that the long 4-6mm of unidirectional short hook portion of short hook, and wide 4-6mm is 60-80 degree angular distortion with vertical component effect.
7. lumbar isthmus according to claim 1 is rebuild inner fixer, it is characterized in that screw rod, nut, the long hook of screw rod, short hook adopt rustless steel to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200972526U CN201101571Y (en) | 2007-08-27 | 2007-08-27 | Internal fixation device for lumbar isthmus reestablishment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200972526U CN201101571Y (en) | 2007-08-27 | 2007-08-27 | Internal fixation device for lumbar isthmus reestablishment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201101571Y true CN201101571Y (en) | 2008-08-20 |
Family
ID=39948589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200972526U Expired - Fee Related CN201101571Y (en) | 2007-08-27 | 2007-08-27 | Internal fixation device for lumbar isthmus reestablishment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201101571Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106344138A (en) * | 2016-03-07 | 2017-01-25 | 无锡市闻泰百得医疗器械有限公司 | Novel lumbar vertebra arch spondylolysis fixed connecting rod with angles adjustable |
| CN114469303A (en) * | 2022-01-25 | 2022-05-13 | 河北医科大学第三医院 | Isthmus fissure implant, installation tool and use method |
-
2007
- 2007-08-27 CN CNU2007200972526U patent/CN201101571Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106344138A (en) * | 2016-03-07 | 2017-01-25 | 无锡市闻泰百得医疗器械有限公司 | Novel lumbar vertebra arch spondylolysis fixed connecting rod with angles adjustable |
| CN106344138B (en) * | 2016-03-07 | 2019-03-01 | 无锡市闻泰百得医疗器械有限公司 | A kind of fixedly adjustable angle pitman of novel lumbar spondylolysis |
| CN114469303A (en) * | 2022-01-25 | 2022-05-13 | 河北医科大学第三医院 | Isthmus fissure implant, installation tool and use method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20080820 Termination date: 20110827 |