CN210301186U - Vertebral plate screw and navigation vertebral plate screw assembly - Google Patents
Vertebral plate screw and navigation vertebral plate screw assembly Download PDFInfo
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- CN210301186U CN210301186U CN201920722204.4U CN201920722204U CN210301186U CN 210301186 U CN210301186 U CN 210301186U CN 201920722204 U CN201920722204 U CN 201920722204U CN 210301186 U CN210301186 U CN 210301186U
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- 239000011295 pitch Substances 0.000 claims abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 32
- 230000008569 process Effects 0.000 description 29
- 238000005553 drilling Methods 0.000 description 10
- 210000000988 bone and bone Anatomy 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000004927 fusion Effects 0.000 description 5
- 208000027418 Wounds and injury Diseases 0.000 description 3
- 208000035965 Postoperative Complications Diseases 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 108010048734 sclerotin Proteins 0.000 description 2
- 206010061213 Iatrogenic injury Diseases 0.000 description 1
- 206010058046 Post procedural complication Diseases 0.000 description 1
- 206010044048 Tooth missing Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000037182 bone density Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000023753 dehiscence Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 210000004872 soft tissue Anatomy 0.000 description 1
- 230000000392 somatic effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
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Abstract
The utility model relates to a vertebral plate screw and a navigation vertebral plate screw component, the vertebral plate screw comprises a screw body part, a cutting edge and a hidden screw cap part, the screw body part comprises a first part and a second part; the first part consists of a first conical rod and a first threaded part; the second part consists of a second taper rod and a second thread part; the tooth heights of the second thread parts are consistent; and the pitches of the first thread part and the second thread part are gradually reduced. The navigation vertebral plate screw component comprises a vertebral plate screw and a puncture needle matched with the vertebral plate screw for use, wherein an internal thread for guiding is arranged inside the screw body; the outside of the puncture needle is provided with an external thread corresponding to the internal thread of the nail body. The vertebral plate screw of the utility model has the advantages of simple structure, large holding force, high guiding and positioning precision, convenient operation for the operator, smaller operation wound, less complication after the operation of the patient and low medical cost.
Description
Technical Field
The utility model relates to a spinal surgery medical instrument technical field especially relates to a vertebral plate screw and navigation vertebral plate screw subassembly that has that the power of controlling is big, the guiding orientation precision is high, the operation wound is little, facilitate the use.
Background
Laminar screws are used in minimally invasive lumbar interbody fusion of the spine. Similar pedicle screws exist, as in the patents: the technical proposal disclosed in CN 105963007 is similar to the use method of vertebral plate screws, and both require that the vertebral body fixing function is achieved by connecting the accessory of the upper vertebral body and the accessory of the lower vertebral body to form a stable structure. In addition, according to patent CN207734209, which is named as an articular process screw, the articular process screw is fixed by providing screw thread sections at the uppermost and lowermost sections of the screw part, and the middle section of the screw part is a thread-free section, and the screw part is provided with spiral chip grooves from the top to the bottom.
The pedicle screw fixing system used in the traditional open lumbar vertebral body fixing intervertebral fusion, such as the patent CN 105963007, is large in the operation wound surface because the use of the pedicle screw fixing system needs to be matched with an open operation, a patient recovers slowly, and many postoperative complications exist, and the pedicle screw needs to be matched with a connecting rod to play a role in fixing, so that the medical cost is increased. In recent years, the rapid development of minimally invasive spinal techniques has gradually expanded to vertebral body fixation fusion, and the percutaneous pedicle screws, the articular process screws and the vertebral plate complex screws are generated concomitantly. The articular process screw internal fixation is to fix the superior and inferior articular processes to create a relatively stable space for vertebral body fusion, and some fixation effects are found to be poor along with follow-up visits to patients. When the existing articular process screw is used, the patent CN207734209 needs medical staff to exert a large pressure during the drilling process to drill the articular process screw into the bone structure. Sometimes, the guide needle is deformed due to overlarge applied pressure, so that the screw cannot be drilled according to the original navigation track, and in the process of drilling the articular process, if the operation is careless, the upper articular process is easily broken due to overlarge external force, and unnecessary iatrogenic injury is caused to a patient.
SUMMERY OF THE UTILITY MODEL
In order to solve and face in current open technology and the wicresoft technique, the operation surface of a wound is big, medical cost is high, postoperative complication is many, fixed fusion effect is not good and intraoperative nature of unnecessary harms scheduling problem in the art, the utility model provides a vertebral plate screw and navigation vertebral plate screw subassembly has simple structure, controls power big, the guide orientation precision height, the operation is created a mouthful little, advantage with low costs.
The utility model provides a solve above-mentioned technical problem, the technical scheme who provides is: a vertebral plate screw comprises a screw body part with a through hole in the middle, a cutting edge arranged at one end of the screw body part and a hidden screw cap part arranged at the other end of the screw body part and used for being matched with an external tool, wherein the screw body part comprises a first part connected with the cutting edge and a second part provided with the hidden screw cap part; the first part consists of a first taper rod and a first threaded part arranged on the outer side of the first taper rod; the end part of the small-diameter end of the first taper rod is connected with the cutting edge; the tooth height of the first thread part gradually becomes lower from one end connected with the cutting edge to one end connected with the second part, so that the outer diameter of the first part is consistent; the second part consists of a second taper rod and a second thread part arranged on the outer side of the second taper rod; the tooth heights of the second thread parts are consistent; and the pitches of the first thread part and the second thread part are gradually reduced.
The cutting edge is composed of three cutting edge units which are spirally distributed at the small-diameter end of the first conical rod; the cutting surface of the blade unit for cutting is arc-shaped, and the supporting surface arranged on the opposite side of the cutting surface is vertical to the end surface of the small-diameter end of the first taper rod.
The hidden nail cap part is positioned at the end part with the larger diameter of the second taper rod and is an inwards concave plum blossom-shaped groove.
A navigation vertebral plate screw assembly comprises a vertebral plate screw and a puncture needle matched with the vertebral plate screw for use, wherein an internal thread for guiding is arranged inside a screw body; the outside of the puncture needle is provided with an external thread corresponding to the internal thread of the nail body.
The utility model discloses the beneficial effect who brings does: the utility model discloses set up the cutting edge at the tip of first portion, medical personnel can be very laborsaving to boring into in the articular process, when preventing to bore into vertebral plate complex body screw, it is too big to bore the power of getting downwards, leads to articular process fracture. The internal thread through nail somatic part carries out guiding orientation with the external thread of pjncture needle, can effectual improvement screw guiding orientation precision when boring. The utility model discloses when using, need pass the sclerotin structure of vertebral plate, superior articular process, inferior articular process, transverse process to the sclerotin characteristics of each structure, in the pitch of screw and tooth height have special settlement, guarantee all to have better the power of controlling at the local screw of different bone density, whole plays good fixed action. When using, utilize two vertebral plate complex body screw, alternately bore into at required position X type, treat fixed centrum and fix, save the connective bar of conventional use before, reduced the destruction to back muscle soft tissue, reduced the probability of the complication of patient's postoperative, but also saved corresponding medical expenses for the patient.
Drawings
Fig. 1 is a front view of the present invention;
FIG. 2 is a view taken along line A of FIG. 1;
FIG. 3 is a view from the direction B of FIG. 1;
FIG. 4 is an enlarged view taken at I in FIG. 1;
FIG. 5 is a schematic view of the blade unit of FIG. 1;
FIG. 6 is a schematic view of the use of a laminar screw;
FIG. 7 is a schematic view of a laminar screw and its mounting assembly;
fig. 8 is a bottom view of the utility model (characteristic of the blade unit).
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
As shown in figures 1-5, in the vertebral plate screw, a screw body 1 comprises a first part 101 connected with a cutting edge 2 and a second part 102 provided with a hidden screw cap part 3; the first part 101 is composed of a first conical rod 1011 and a first threaded part 1012 arranged outside the first conical rod 1011; the end of the small diameter end of the first taper rod 1011 is connected with the cutting edge 2; the tooth height of the first thread part 1012 gradually becomes lower from the end connected with the cutting edge 2 to the end connected with the second part 102, so that the outer diameter of the first part 101 is uniform; wherein, the second portion 102 is composed of a second taper rod 1021 and a second thread part 1022 arranged outside the second taper rod 1021; the second thread part 1022 has uniform tooth height; and the pitches of the first thread part 1012 and the second thread part 1022 become gradually smaller. The first part 101 and the second part 102 are provided with a through hole 1A inside, which through hole 1A is used for mounting a guiding structure, such as a puncture needle 4. The through hole 1A is arranged from one end connected with the cutting blade 2 to one end provided with the hidden type nut part 3 in a penetrating way.
Because the utility model discloses when using, save the connective bar structure, utilize two the utility model discloses an X type cross fixation. In use, the bone substance that the utility model needs to pass through is gradually loosened from the outside to the inside, so, in order to increase the fastening effect, the thread pitch of the first thread part 1012 and the second thread part 1022 is gradually reduced.
Meanwhile, in order to prevent the problem of drilling cracks of the articular process during use, the tooth height of the first thread part 1012 is gradually reduced from the end connected with the cutting edge 2 to the end connected with the second part 102, so that the outer diameter of the first part 101 is consistent; the problem that the drilling surface cannot crack in the drilling process is guaranteed.
Further, since the drilling surface is drilled by the first portion 101, the bone surface is seriously damaged and the possibility of thread slipping increases, and therefore, the tooth height of the second thread part 1022 is uniform. The shorter length of the second threaded portion 1022 reduces the chance of facet dehiscence after drilling of the first portion 101. Meanwhile, the second thread part 1022 shows a taper change along with the second taper rod 1021, increasing the holding force of the utility model.
As shown in fig. 8, the cutting blade 2 is composed of three blade units 201 disposed at the small diameter end of the first tapered rod 1011; the cutting surface 201A of the blade unit 201 for cutting is formed in an arc shape, and a blade surface may be provided on the cutting surface 201A. The three blade units 201 may be spirally disposed on the small diameter end surface of the first tapered rod 1011. This kind of setting can make medical personnel using the utility model discloses the time, add decurrent strength slightly, cut the face 201A can be quick bore the articular process in, the existence of cutting face 201A makes the use more laborsaving, moreover, the cutting edge unit 201 of equipartition can reduce and bore the resistance with convenient discharges such as bone sediment. Meanwhile, the support surface 201B disposed at the opposite side of the cutting surface 201A is perpendicular to the end surface of the small diameter end of the first tapered rod 1011. The supporting surface 201B is perpendicular to the end surface of the small diameter end of the first taper rod 1011, and can support the blade unit 201 to prevent the blade unit 201 from being broken. Meanwhile, the three blade units 201 can be arranged into a spiral shape formed by the axis array of the first conical rod 1011 in a conventional manner, so that drilling and cutting are facilitated.
The end part with larger diameter of the second taper rod 1021 is provided with an inwards concave plum blossom-shaped groove as a hidden type cap part 3. The main function of the recessed nut portion 3 is to cooperate with an external tightening tool. Such as the use of existing screws and screwdrivers.
It is specific, different according to the disease condition, can with the utility model discloses a length sets up different specifications, if different to application environment, sets up the specification of three kinds of differences.
Table I: the utility model discloses the parameter table of three kinds of different specifications.
| Categories | The first part Length of | The first part is straight Diameter variation | First partial screw Height of thread | The first part Outer diameter | The second part Length of | The second part is straight Diameter variation | Second partial screw Height of thread | The second part Outer diameter |
| T1 | 40mm | 2.8~3.6mm | Variations in | 4.5mm | 14 | 3.6~4.9mm | 0.6mm | Variations in |
| T2 | 44mm | 3.1~3.9mm | Variations in | 5.0mm | 14 | 3.9~5.2mm | 0.8mm | Variations in |
| T3 | 48mm | 3.4~4.2mm | Variations in | 5.5mm | 14 | 4.2~5.5mm | 1.0mm | Variations in |
It is to be understood that: the hidden type nut portion 3 is not specifically limited in table I, and the hidden type nut portions 3 have the same size for use with an external tool.
During manufacturing, the technical requirements are as follows:
1. the hardness of TC4 is more than or equal to 260HV 10;
2. the product has no sharp edge and burr, and the cutting edge 2 is sharp and complete;
3. each thread is clear and complete, and the phenomenon of tooth missing and tooth decay is avoided;
4. the hidden type screw cap part 3 has good matching performance with the detection tool;
in use, as shown in fig. 6, the cutting edge 2 on the first tapered rod 1011 connects two joints to be connected by using an external tool to be connected with the hidden type cap part 3. From the base of the spinous process 100 of the first lamina, approximately at the apex 1/3 of the spinous process 100, the cutting edge 2 is used to drill through the spinous process 100, along the lamina, out through the inferior articular process 200, and through the root of the superior articular process 300 of the adjacent vertebral body to the base of the transverse process 400. The quantity is two the utility model discloses, through the cross fixation, be in the same place two centrums are fixed.
In the using process, when the existing puncture needle 4 is matched with the vertebral plate complex screw for use, the puncture needle 4 is used for positioning at a required position, and then the puncture needle 4 penetrates from the outer side of the puncture needle 4 through the through hole 1A on the vertebral plate complex screw, so that the navigation effect of the puncture needle 4 is realized. Because the vertebral plate complex screw needs to continuously penetrate through the vertebral plate, the upper and lower articular processes and the transverse process bone tissues, the drilling depth of the screw is large, and if the puncture needle 4 cannot accurately position the vertebral plate complex screw, the screw can be greatly deviated along with the penetration of the vertebral plate complex screw during an operation.
In clinical use, it is found that when the through hole 1A is used for navigation, since the through holes 1A of the nail body 1 are all larger than the diameter of the puncture needle 4, if the diameter of the through hole 1A is too small or equal to the diameter of the puncture needle 4, a large resistance exists in installation. Therefore, the diameter of the through hole 1A in the spike body 1 is larger than that of the puncture needle 4. When the nail body part 1 is installed, the diameter of the through hole 1A is larger than that of the puncture needle 4, so that the vertebral plate complex screw radially shakes on the puncture needle 4, the puncture needle is deformed in the drilling process sometimes, the accuracy of guiding and positioning is reduced, and the operation effect is not ideal.
In view of the above problems, as shown in fig. 7, a navigation vertebral plate screw assembly includes a vertebral plate screw (the vertebral plate screw is the vertebral plate screw of the present invention) and a puncture needle 4 used in cooperation with the vertebral plate screw, wherein an internal thread for guiding is provided inside a nail body 1; the exterior of the puncture needle 4 is provided with an external thread corresponding to the internal thread of the nail body 1.
The internal thread through nail body 1 and the external thread of pjncture needle 4 carry out guiding orientation, can effectual improvement screw guiding orientation precision when boring into.
The foregoing is considered as illustrative and not restrictive, and all changes that come within the spirit and principles of the invention and any equivalents thereto are intended to be embraced therein.
Claims (4)
1. The utility model provides a vertebral plate screw, includes nail body portion (1) that has through-hole (1A) in the middle, sets up cutting edge (2) in nail body portion (1) one end to and set up at nail body portion (1) other end be used for with external instrument complex hidden nut portion (3), its characterized in that: the nail body part (1) comprises a first part (101) connected with the cutting edge (2) and a second part (102) provided with a hidden type nail cap part (3);
the first part (101) is composed of a first conical rod (1011) and a first threaded part (1012) arranged on the outer side of the first conical rod (1011); the end part of the small-diameter end of the first conical rod (1011) is connected with a cutting edge (2); the tooth height of the first thread part (1012) gradually becomes lower from one end connected with the cutting edge (2) to one end connected with the second part (102) so that the outer diameters of the first part (101) are consistent;
wherein the second part (102) consists of a second taper rod (1021) and a second thread part (1022) arranged outside the second taper rod (1021); the tooth height of the second thread part (1022) is consistent;
and the pitches of the first thread part (1012) and the second thread part (1022) are gradually reduced.
2. The laminar screw of claim 1, wherein: the cutting edge (2) consists of three cutting edge units (201) which are spirally distributed at the small-diameter end of the first conical rod (1011);
a cutting surface (201A) of the blade unit (201) for cutting is in a circular arc shape, and a support surface (201B) arranged on the opposite side of the cutting surface (201A) is perpendicular to the end surface of the small-diameter end of the first taper rod (1011).
3. The laminar screw of claim 1, wherein: the hidden type screw cap part (3) is positioned at the end part with larger diameter of the second taper rod (1021) and is an inwards concave plum blossom-shaped groove.
4. A navigational vertebral plate screw assembly, comprising: comprises the vertebral plate screw of claim 1 and a puncture needle (4) matched with the vertebral plate screw, wherein the inside of the nail body part (1) is provided with an internal thread for guiding; the outside of the puncture needle (4) is provided with an external thread corresponding to the internal thread of the nail body part (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920722204.4U CN210301186U (en) | 2019-05-20 | 2019-05-20 | Vertebral plate screw and navigation vertebral plate screw assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920722204.4U CN210301186U (en) | 2019-05-20 | 2019-05-20 | Vertebral plate screw and navigation vertebral plate screw assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210301186U true CN210301186U (en) | 2020-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920722204.4U Active CN210301186U (en) | 2019-05-20 | 2019-05-20 | Vertebral plate screw and navigation vertebral plate screw assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210301186U (en) |
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- 2019-05-20 CN CN201920722204.4U patent/CN210301186U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210809 Address after: 471000 No.80 Jinguyuan Road, Xigong District, Luoyang City, Henan Province Patentee after: HENAN UNIVERSITY OF SCIENCE AND TECHNOLOGY SECOND AFFILIATED Hospital Address before: 471000 No.80 Jinguyuan Road, Xigong District, Luoyang City, Henan Province Patentee before: Jia Zhiqiang |
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| TR01 | Transfer of patent right |