CN203107265U - Vertebral pedicle internal fixing screw and vertebral pedicle internal fixing system - Google Patents
Vertebral pedicle internal fixing screw and vertebral pedicle internal fixing system Download PDFInfo
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- CN203107265U CN203107265U CN 201320147693 CN201320147693U CN203107265U CN 203107265 U CN203107265 U CN 203107265U CN 201320147693 CN201320147693 CN 201320147693 CN 201320147693 U CN201320147693 U CN 201320147693U CN 203107265 U CN203107265 U CN 203107265U
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- pedicle
- internal fixation
- screw
- shaped portion
- vertebral arch
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Abstract
The utility model relates to the field of vertebral pedicle internal fixing equipment used in a spine surgery operation and provides a vertebral pedicle internal fixing screw which is capable of reducing medical expenses and high in safety performance of the operation. The vertebral pedicle internal fixing screw comprises a screw part and a fixing part arranged at the upper end of the screw part, wherein the fixing part comprises a U-shaped part connected with the screw part and a guiding part extending upwards from the flank of the U-shaped part, the U-shaped part and the guiding part are separated, a clamping groove with an upward opening is formed in the flank of the U-shaped part, and the lower end of the guiding part and the clamping groove are fixed relatively through interference fit. The guiding part can be recycled, and therefore waste of titanium is avoided and the medical expenses are reduced. Meanwhile, due to the fact that the U-shaped part and the guiding part are separated, sharp notches are prevented from being formed in the titanium when the titanium is broken or sheared so that a doctor can confirm whether a nut is fixed in place conveniently, and the safety performance of the operation is improved. The utility model further provides a vertebral pedicle internal fixing system adopting the vertebral pedicle internal fixing screw.
Description
Technical field
The present invention relates to spinal surgery internal fixation apparatus field, more specifically, relate to a kind of pedicle of vertebral arch internal fixation screw and pedicle of vertebral arch internal fixation system thereof.
Background technology
Spinal column pedicle of vertebral arch internal fixation system is existing surgical operation internal fixation equipment commonly used, when the human spine is impaired when needing operative treatment, can fix and corrects the damage spinal column by spinal column pedicle of vertebral arch internal fixation system, is convenient to recovery.Because spinal column pedicle of vertebral arch internal fixation system is in the implant into body, follows the armarium of whole recovery process, therefore need to adopt the good material close to the sclerotin elastic modelling quantity of human compatibility.What therefore existing pedicle of vertebral arch internal fixation system preferably adopted is that full titanium alloy metal is made, and titanium alloy has stable properties, and the repulsion row that brings behind the implant into body is very little.But the shortcoming of titanium is expensive, several thousand yuan easily of small-sized internal fixation systems, large-scale internal fixation system even reach several ten thousand to last 100,000.Bring very big economic pressures to the patient like this, for considering of medical expense, often delayed the best medical treatment time.
In addition on the one hand, in spinal internal fixation system, when a plurality of pedicle of vertebral arch internal fixation screws location is screwed in vertebral body, because the out-of-flatness shape of vertebral body, may deform after the damage in addition, the pedicle of vertebral arch internal fixation screw will be uneven after screwing in, and the angle difference, and this brings great difficulty for the installation of connecting rod.The doctor operates in operation process for convenience, and the pedicle of vertebral arch internal fixation screw has two very long, upwardly extending alar parts, is used for passing connecting rod in the middle of the alar part.In operation process, the guide effect when alar part plays connecting rod and is pressed into, alar part is more long, and Vietnamese side just operates.Because the alar part that is retained at last in the human body can not be oversize, need fix by nut after connecting rod is pressed into, the alar part that will be higher than nut fractures or cuts off.The part that fractures or deduct is medical waste, needs to discard, because titanium is expensive, the length of break-off portion is long again, has therefore caused a large amount of titanium wastes, and this also is to cause performing the operation the high reason of cost, and wherein major part slatterns.
In addition, because the visual field in the human body is very little in the operation process, is much locally covered or block by blood and tissue, after the alar part that fractures, whether the doctor need remove to confirm nut fix in position by finger.But because the breach of titanium after fractureing is very sharp, accidentally will hurt doctor's finger, cause cross infection easily, bring great risk for doctor and patient.
Summary of the invention
Primary and foremost purpose of the present invention provides a kind of minimizing titanium consumption, saves manufacturing cost, thereby reduces medical expense, avoids the breach incised wound doctor finger after titanium fractures simultaneously, improves the pedicle of vertebral arch internal fixation screw of operation safety.
Further purpose of the present invention provides a kind of reduction medical expense, the pedicle of vertebral arch internal fixation system that operation safety is high.
The technical solution adopted for the present invention to solve the technical problems is: a kind of pedicle of vertebral arch internal fixation screw, comprise screw division and the fixed part of being located at the screw division upper end, described fixed part comprises the U-shaped portion that is connected with screw division and at the upwardly extending guide part of U-shaped portion flank, described U-shaped portion and guide part are separate type, the flank of described U-shaped portion is provided with the draw-in groove that opening makes progress, and lower end and the draw-in groove of described guide part are realized relative fixed by interference fit.
Pedicle of vertebral arch internal fixation screw of the present invention utilizes the guide effect of guide part that connecting rod is pressed into U-shaped portion in use, fixes by nut, then guide part is extracted in the draw-in groove of U-shaped portion, need not to fracture or deduct, and is convenient to medical personnel's operation.Guide part after extracting can also be used with other pedicle of vertebral arch internal fixation screw, thereby reaches the purpose of recycling, has avoided the waste of a large amount of titaniums, saves manufacturing cost, reduces medical expense, reduces patient's economic pressures.Simultaneously, U-shaped portion and guide part are separate type, produce sharp breach with regard to having avoided titanium because fractureing or cutting off, and are convenient to the doctor and whether confirm nut fix in position, can not hurt finger, improve operation safety.
In one embodiment, the lower end of described draw-in groove and guide part is provided with salient point and the recess of mutual coupling.Because guide part and draw-in groove are to realize relatively-stationaryly by interference fit, might be subjected to the effect of external force in the use and occur becoming flexible, and can not finish guiding well, thereby increase surgical risk.The lower end of draw-in groove and guide part is provided with salient point and the recess of mutual coupling, can further guarantee between the lower end of guide part and the draw-in groove fixing reliably, avoids occurring unexpected, reduces operation risk.
In one embodiment, the degree of depth of described draw-in groove is 0.2 ~ 0.8 times of height of U-shaped portion flank, is preferably 0.4 ~ 0.6 times.If the degree of depth of draw-in groove is too shallow, can cause and guide part between fix unreliable; If the degree of depth of draw-in groove is too dark, guide part then can corresponding increase length cooperate with draw-in groove, and then increases the cost of making.
In one embodiment, the thickness of described draw-in groove is 0.4 ~ 0.6 times of thickness of U-shaped portion flank.Because U-shaped portion flank itself is thinner, draw-in groove is located on the flank of U-shaped portion, so the thickness of draw-in groove can not be too thick; And the thickness of the thickness of draw-in groove and guide part lower end is complementary, if the thickness of draw-in groove is too thin, the lower end of guide part will be difficult to snap in.Also will consider the intensity of U-shaped portion and guide part simultaneously, so the thickness of draw-in groove the best is 0.4 ~ 0.6 times of thickness of U-shaped portion flank.
In a preferred implementation; described U-shaped portion by a cylindrical column center offer installing hole, the side offers mounting groove and forms; be provided with screw thread in the described installing hole; be convenient to rotation and install and protect the inside of human body tissue; this structure is convenient to the processing that screw is saved material most simultaneously; under the prerequisite of proof strength, significantly reduce the titanium metal material consumption of screw.
In one embodiment, described screw division and described U-shaped portion are one-body molded, this structure is convenient to the operation that screw screws in vertebral body, is convenient to the operation recess that instrument rotates by special tool(s) or in U-shaped portion arranged outside, can easily screw be screwed in the vertebral body.In another embodiment, for some special vertebral body positions, the U-shaped portion of the pedicle of vertebral arch internal fixation screw that adopts can adopt the bottom to offer through hole, and screw division passes described through hole, and reservation screw division head is connected to the structure on the through hole.U-shaped portion and the screw division of this bolt structure are movable links, have made things convenient for and in use can regulate the angle of U-shaped portion, so that fix more flexibly.
A kind of pedicle of vertebral arch internal fixation system that adopts above-mentioned pedicle of vertebral arch internal fixation screw comprises a plurality of pedicle of vertebral arch internal fixation screws, the connecting rod of a plurality of bone pedicle of vertebral arch internal fixation screws of connecting, the nut of stationary links in internal fixation screw U-shaped portion.In use, a plurality of internal fixation screws are positioned screw-in by the precalculated position, in hold-down screw (generally selecting the screw of head and the tail position for use) end of connecting rod is pressed into to U-shaped portion along guide part therein, be followed successively by center of rotation then, one by one the guide part of connecting rod from other screws be pressed into to the U-shaped portion of each screw.Next screw in one by one from guide part by nut, connecting rod is depressed into U-shaped portion bottom fixes.At last guide part is extracted in the draw-in groove of U-shaped portion, confirmed whether nut all screws in the U portion, prevents that nut gets loose in the process of rehabilitation.For the spinal internal fixation system that many connecting rods are arranged, comprise the connecting rod of at least two a plurality of pedicle of vertebral arch internal fixation screws of series connection, can also between connecting rod, be connected with horizontal syndeton.
The invention has the beneficial effects as follows: guide part of the present invention can be recycled, and has avoided the waste of a large amount of titaniums, saves manufacturing cost, reduces medical expense, reduces patient's economic pressures.Simultaneously, U-shaped portion and guide part are separate type, produce sharp breach with regard to having avoided titanium because fractureing or cutting off, and are convenient to the doctor and whether confirm nut fix in position, can not hurt finger, improve operation safety.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1.
Fig. 2 is the cutaway view of the embodiment of the invention 1.
Fig. 3 is the vertical view of the embodiment of the invention 1.
Fig. 4 is illustrated schematically in shape and the structural change of guide part among other embodiment.
Fig. 5 is the scheme of installation of the embodiment of the invention 1.
Fig. 6 is the user mode figure of one embodiment of the invention.
Fig. 7 is the structural representation of the embodiment of the invention 2.
Fig. 8 is the cutaway view of the embodiment of the invention 2.
Accompanying drawing only is used for exemplary illustration, can not be interpreted as limitation of the present invention; For better explanation embodiment, some parts of accompanying drawing have omission, amplify or dwindle, and do not represent the size of actual product; To those skilled in the art, in the accompanying drawing some known features and explanation thereof may to omit be understandable.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details.
Embodiment 1
As Fig. 1, Fig. 2, Fig. 3, shown in Figure 5, a kind of pedicle of vertebral arch internal fixation screw 100 of the present invention, comprise screw division 101 and the fixed part 102 of being located at screw division 101 upper ends, described fixed part 102 comprises the U-shaped portion 103 that is connected with screw division 101 and at the upwardly extending guide part 104 of U-shaped portion 103 flanks, described U-shaped portion 103 and guide part 104 are separate type, the flank of described U-shaped portion 103 is provided with the draw-in groove 105 that opening makes progress, and the lower end of described guide part 104 and draw-in groove 105 are realized relative fixed by interference fit.
In the present embodiment, for fixing reliable between the lower end of further guaranteeing guide part 104 and the draw-in groove 105, avoid occurring unexpected, reduce operation risk, the lower end of described draw-in groove 105 and guide part 104 is provided with salient point and the recess (not shown) of mutual coupling.
As shown in Figure 5, in the present embodiment, the depth H 1 of described draw-in groove 105 is 0.2 ~ 0.8 times of height H 2 of U-shaped portion 103 flanks, is preferably 0.4 ~ 0.6 times, such as 0.5 times.The thickness of described draw-in groove 105 is 0.4 ~ 0.6 times of thickness of U-shaped portion 103 flanks, such as 0.5 times.
In the present embodiment, described U-shaped portion 103 by a cylindrical column center offer installing hole, the side offers mounting groove and forms, and is provided with screw thread in the described installing hole.In other embodiments, for shape and structure with U-shaped portion 103 are complementary, guide part 104 can also be designed to several shapes and structure shown in Figure 4, perhaps as the case may be, is designed to other shape and structure.
As shown in Figure 1 and Figure 2, in the present embodiment, described screw division 101 is one-body molded with described U-shaped portion 103, and this structure is convenient to the operation that screw screws in vertebral body, be convenient to the operation recess that instrument rotates by special tool(s) or in U-shaped portion 103 arranged outside, can easily screw be screwed in the vertebral body.
As Fig. 5, shown in Figure 6, a kind of pedicle of vertebral arch internal fixation system 200 that adopts above-mentioned pedicle of vertebral arch internal fixation screw 100, comprise a plurality of pedicle of vertebral arch internal fixation screws 100, the connect connecting rod 300 of a plurality of pedicle of vertebral arch internal fixation screws 100, the nut 400 of stationary links 300 in pedicle of vertebral arch internal fixation screw U-shaped portion 103.For the pedicle of vertebral arch internal fixation system that many connecting rods 300 are arranged, comprise the connecting rod 300 of at least two a plurality of pedicle of vertebral arch internal fixation screws of series connection, can also between connecting rod 300, be connected with horizontal syndeton (not shown).In use, the pedicle of vertebral arch that connects at needs screws in a plurality of pedicle of vertebral arch internal fixation screws 100 earlier, and pedicle of vertebral arch internal fixation screw 100 is arranged in a linear.Pedicle of vertebral arch internal fixation screw 100(generally selects the screw of head and the tail position for use therein) in an end of connecting rod 300 is pressed into to U-shaped portion 103 along guide part 104, be followed successively by center of rotation then, one by one the guide part 104 of connecting rod 300 from other screws be pressed into to the U-shaped portion 103 of each screw.Wherein the guide part 104 of each pedicle of vertebral arch internal fixation screw has played the effect of guiding, makes things convenient for being pressed into of connecting rod 300.Next nut 400 is threaded to U-shaped portion 103, by nut 400 connecting rod 300 is depressed into U-shaped portion 103 bottoms and fixes.At last guide part 104 is extracted in the draw-in groove 105 of U-shaped portion 103, after the installation as shown in Figure 5.Confirm then whether nut 400 all screws in the U-shaped portion 103, prevents in follow-up use, nut 400 loosening dropping.Because U-shaped portion 103 and guide part 104 be separate type, produce sharp breach with regard to having avoided titanium because of fractureing or cutting off, under sight line was subjected to situation that blood and tissue stop, whether the doctor can relievedly be rotated in place with pointing affirmation nut 400.
Embodiment 2
As Fig. 7, shown in Figure 8, the difference of present embodiment and embodiment 1 is: in the present embodiment, for some special vertebral body positions, the U-shaped portion 103 of the pedicle of vertebral arch internal fixation screw 100 that adopts adopts the bottom to offer through hole, screw division 101 passes described through hole, and reservation screw division 101 heads are connected to the structure on the through hole.U-shaped portion 103 and the screw division 101 of this bolt structure are movable links, have made things convenient for and in use can regulate the angle of U-shaped portion 103, so that fix more flexibly.
Other structures are identical with embodiment 1.
Below only be preferred embodiment of the present utility model, but design concept of the present utility model is not limited thereto, all insubstantial modifications of utilizing this design that this utility model is made also all fall within the protection domain of the present utility model.
Claims (9)
1. pedicle of vertebral arch internal fixation screw, comprise screw division and the fixed part of being located at the screw division upper end, it is characterized in that, described fixed part comprises the U-shaped portion that is connected with screw division and at the upwardly extending guide part of U-shaped portion flank, described U-shaped portion and guide part are separate type, the flank of described U-shaped portion is provided with the draw-in groove that opening makes progress, and lower end and the draw-in groove of described guide part are realized relative fixed by interference fit.
2. pedicle of vertebral arch internal fixation screw according to claim 1 is characterized in that, the lower end of described draw-in groove and guide part is provided with salient point and the recess of mutual coupling.
3. pedicle of vertebral arch internal fixation screw according to claim 1 is characterized in that, the degree of depth of described draw-in groove is 0.2 ~ 0.8 times of height of U-shaped portion flank.
4. pedicle of vertebral arch internal fixation screw according to claim 3 is characterized in that, the degree of depth of described draw-in groove is 0.4 ~ 0.6 times of height of U-shaped portion flank.
5. pedicle of vertebral arch internal fixation screw according to claim 1 is characterized in that, the thickness of described draw-in groove is 0.4 ~ 0.6 times of thickness of U-shaped portion flank.
6. according to each described pedicle of vertebral arch internal fixation screw of claim 1 to 5, it is characterized in that, described U-shaped portion by a cylindrical column center offer installing hole, the side offers mounting groove and forms, and is provided with screw thread in the described installing hole.
7. pedicle of vertebral arch internal fixation screw according to claim 6 is characterized in that, described screw division and described U-shaped portion are one-body molded; Or the bottom of described U-shaped portion offers through hole, and screw division passes described through hole, keeps the screw division head and is connected on the through hole.
8. pedicle of vertebral arch internal fixation system that adopts each described pedicle of vertebral arch internal fixation screw of claim 1 to 5, it is characterized in that, comprise a plurality of pedicle of vertebral arch internal fixation screws, the connecting rod of a plurality of pedicle of vertebral arch internal fixation screws of connecting, the nut of stationary links in pedicle of vertebral arch internal fixation screw U-shaped portion.
9. pedicle of vertebral arch internal fixation system according to claim 8 is characterized in that, described system comprises the connecting rod of at least two a plurality of pedicle of vertebral arch internal fixation screws of series connection, is connected with horizontal syndeton between the connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320147693 CN203107265U (en) | 2013-03-28 | 2013-03-28 | Vertebral pedicle internal fixing screw and vertebral pedicle internal fixing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320147693 CN203107265U (en) | 2013-03-28 | 2013-03-28 | Vertebral pedicle internal fixing screw and vertebral pedicle internal fixing system |
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| Publication Number | Publication Date |
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| CN203107265U true CN203107265U (en) | 2013-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320147693 Expired - Fee Related CN203107265U (en) | 2013-03-28 | 2013-03-28 | Vertebral pedicle internal fixing screw and vertebral pedicle internal fixing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104434292A (en) * | 2014-12-24 | 2015-03-25 | 山东威高骨科材料股份有限公司 | Minimally invasive percutaneous pedicle screw with detachable tail length adjusting arms |
| CN112716582A (en) * | 2020-12-22 | 2021-04-30 | 浙江大学医学院附属邵逸夫医院 | Pedicle screw rod internal fixing device with positioning pin as inner core |
-
2013
- 2013-03-28 CN CN 201320147693 patent/CN203107265U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104434292A (en) * | 2014-12-24 | 2015-03-25 | 山东威高骨科材料股份有限公司 | Minimally invasive percutaneous pedicle screw with detachable tail length adjusting arms |
| CN112716582A (en) * | 2020-12-22 | 2021-04-30 | 浙江大学医学院附属邵逸夫医院 | Pedicle screw rod internal fixing device with positioning pin as inner core |
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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: 20130807 Termination date: 20140328 |