CN213310211U - Connecting rod and spinal nail rod system - Google Patents
Connecting rod and spinal nail rod system Download PDFInfo
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- CN213310211U CN213310211U CN202021727273.3U CN202021727273U CN213310211U CN 213310211 U CN213310211 U CN 213310211U CN 202021727273 U CN202021727273 U CN 202021727273U CN 213310211 U CN213310211 U CN 213310211U
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- outer sleeve
- elastic outer
- elastic
- connecting rod
- rod
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Abstract
The utility model discloses a connecting rod and a spine nail rod system, which belong to the technical field of orthopedic implants, wherein the connecting rod comprises an elastic outer sleeve and a guide mandrel inserted in the elastic outer sleeve, the middle part of the elastic outer sleeve is provided with a spiral groove so as to lead the outer sleeve to have elasticity, one end of the elastic outer sleeve is closed, and the other end of the elastic outer sleeve is provided with an insertion port; the head end of the guide mandrel is inserted into the elastic outer sleeve from the insertion port and extends to the closed end, a gap is formed between the head end of the guide mandrel and the closed end of the elastic outer sleeve, and the tail end of the guide mandrel is fixedly connected with the elastic outer sleeve. The utility model discloses in, the connective bar possesses struts and pressurization function, can restrict anteflexion and stretch after, and elastic movement range is great, more is close the normal physiological condition of human body, and the security is high.
Description
Technical Field
The utility model relates to an orthopedic implant technical field especially indicates a connective bar and have backbone nail stick system of this connective bar.
Background
At present, the spinal fusion technology obtains better curative effect on the aspect of treating spinal diseases, particularly low back pain and unstable lumbar, and the fusion rate reaches more than 90 percent. However, the clinical curative effect of the traditional Chinese medicine composition does not reach the expected value; and strong internal fixation and spinal fusion have the potential to accelerate complications of adjacent segment degeneration, internal fixation failure, postoperative pseudoarthroplasty, and the like.
In view of the above, dynamic fixation is becoming a more popular technique for treating degenerative cervical and lumbar diseases in recent years. The dynamic internal fixation system is dynamically fixed by being implanted on the premise of not sacrificing the immediate stability of the spine, and the load transmission of the firm internal fixation can be dispersed after the operation, so that the stress shielding is avoided. The postoperative patient can recover quickly, the recurrence rate is low, the symptoms such as pain and the like are relieved remarkably, and the postoperative patient can get out of bed for activities in early stage and recover daily life and the like.
The existing dynamic internal spinal fixation system has a plurality of defects, and the main problem is that the elastic movement range of the connecting rod is small and far smaller than the movement ranges of human spinal extension, flexion, rotation and the like, so that low complications and good long-term effect are difficult to ensure.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a spinal nail stick system that the elastic movement scope is big, and high connective bar of security and this connective bar have.
In order to solve the technical problem, the utility model provides a technical scheme as follows:
in one aspect, a connecting rod is provided, which includes an elastic outer sleeve and a guiding mandrel inserted into the elastic outer sleeve, wherein:
the middle part of the elastic outer sleeve is provided with a spiral groove so that the outer sleeve has elasticity, one end of the elastic outer sleeve is closed, and the other end of the elastic outer sleeve is provided with a plug-in port;
the head end of the guide mandrel is inserted into the elastic outer sleeve from the insertion port and extends to the closed end, a gap is formed between the head end of the guide mandrel and the closed end of the elastic outer sleeve, and the tail end of the guide mandrel is fixedly connected with the elastic outer sleeve.
Furthermore, the tail end of the guide mandrel is fixedly connected with the elastic outer sleeve through a fixing pin.
Further, the length of the gap is 2-5 mm.
Furthermore, a flexible protective sleeve is sleeved on the guide mandrel.
Further, the flexible protective sleeve has an axial length greater than an axial length of the helical slot to separate the guide mandrel and the helical slot.
Furthermore, a longitudinal slit is formed in the flexible protective sleeve.
In another aspect, a spinal screw rod system is provided, which comprises a pedicle screw and a connecting rod, wherein the connecting rod is the above connecting rod.
Furthermore, the pedicle screw is provided with a U-shaped groove for placing the connecting rod, the U-shaped groove is provided with internal threads, and an anti-dead-pressing washer and a compression nut are arranged above the connecting rod in the U-shaped groove.
Further, the lower end of the anti-dead-pressing gasket is provided with an arc-shaped slot, and the diameter of the arc-shaped slot is the same as the outer diameter of the connecting rod.
Furthermore, the upper end of the anti-dead-pressing gasket is provided with a groove in the same direction as the arc-shaped groove.
The utility model discloses following beneficial effect has:
in the utility model, the connecting rod has the functions of opening and pressurizing, can limit forward bending and backward stretching, has larger elastic movement range, is more close to the normal physiological condition of human body, and has high safety; the device can be continuously opened when in rest, and continuously pressurized when in standing without exceeding the normal compression range.
Drawings
FIG. 1 is a schematic view of a split structure of the connecting rod of the present invention;
FIG. 2 is a schematic view of the connecting rod of FIG. 1 in an assembled state;
FIG. 3 is a schematic cross-sectional view of the connector rod of FIG. 2;
FIG. 4 is a schematic structural view of the spinal nail rod system of the present invention;
fig. 5 is a schematic structural view of the anti-lock washer in fig. 4.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
In one aspect, the present invention provides a connecting rod, as shown in fig. 1-3, comprising an elastic outer sleeve 1 and a guiding mandrel 2 inserted into the elastic outer sleeve 1, wherein:
the middle part of the elastic outer sleeve 1 is provided with a spiral groove 11 so that the outer sleeve has elasticity, one end of the elastic outer sleeve 1 is closed, and the other end of the elastic outer sleeve is provided with a plug-in port 12;
the head end 21 of the guiding mandrel 2 is inserted into the elastic outer sleeve 1 from the insertion port 12 and extends to the closed end, a gap L is formed between the head end 21 of the guiding mandrel 2 and the closed end of the elastic outer sleeve 1, the closed end is in blocking fit with the head end 21 of the guiding mandrel 2, the contraction/compression distance of the elastic outer sleeve 1 can be limited, the gap L corresponds to the elastic compression distance of the connecting rod, the size of the gap L can be flexibly set according to needs, and can be 2-5mm, for example 3 mm;
the tail end 22 of the guiding mandrel 2 is fixedly connected with the elastic outer sleeve 1 (screws, welding and the like are all available), however, for the convenience of disassembly, the fixing pin 3 is preferably fixedly connected, and the upper end and the lower end of the fixing pin 3 can be more firm and beautiful through welding and polishing.
In the utility model, the middle part of the elastic outer sleeve is provided with the spiral groove to ensure that the outer sleeve has elasticity, thereby realizing the function of elastically expanding the connecting rod; meanwhile, a guide mandrel is added into the hollow elastic outer sleeve, and the guide mandrel is in sliding connection with the middle elastic part of the elastic outer sleeve, so that the elastic function is maintained, and the bending function of the elastic outer sleeve is protected; simultaneously through the clearance between the head end of direction dabber and the blind end of elasticity outer tube, can control the elastic compression distance of connective bar, when realizing the postoperative elastic stimulation between the centrum, guarantee that the intervertebral can not excessively compress. The whole function is that the middle elastic part of the elastic outer sleeve provides the strutting force, the height of the intervertebral space is maintained, and the traction effect is formed.
In summary, the connecting rod of the utility model has the functions of expanding and pressurizing, can limit forward bending and backward stretching, has larger elastic movement range, is more close to the normal physiological condition of human body, and has high safety; the device can be continuously opened when in rest, and continuously pressurized when in standing without exceeding the normal compression range.
The elastic outer sleeve 1 and the guiding core shaft 2 are made of metal, such as titanium alloy. The distance between adjacent spiral grooves 11 in the middle of the elastic outer sleeve 1 is preferably 2-4 times the width of the spiral grooves 11, so that the elastic effect is optimal. The width and the spiral density of the spiral groove 11 can be adjusted according to actual requirements, the spiral groove with large width and large spiral density can be selected for the elastic rod with high elasticity requirement, and the spiral groove with small width and small spiral density can be selected for the elastic rod with small elasticity requirement and high support strength requirement.
The guide mandrel 2 can be sleeved with a flexible protective sleeve 4 to avoid friction cutting caused by relative motion between the elastic outer sleeve 1 and the guide mandrel 2 in the motion process. Because elasticity outer tube 1 and direction dabber 2 are made by the metal material, this structural design though can guarantee sufficient support intensity, but relative motion between two metalworks, and the collision of elasticity outer tube 1 between crooked in-process and direction dabber 2, all can cause great damage to two parts, moreover, spiral fluting 11 on the elasticity outer tube 1 can cut direction dabber 2 at flexible in-process, the metal piece that produces also can cause great influence to the human body, so set up flexible protective sheath 4 between the two, separate elasticity outer tube 1 and direction dabber 2. Furthermore, the flexible protection sleeve 4 can be provided with a longitudinal slit 41, so that the longitudinal section of the flexible protection sleeve 4 is C-shaped and has certain elasticity, and thus, the relative motion between two metal pieces between the elastic outer sleeve 1 and the guide mandrel 2 can be changed into the relative motion between the elastic outer sleeve 1 and the flexible protection sleeve 4, the guide mandrel 2 and the flexible protection sleeve 4, and the metal pieces and the flexible pieces, because of the relative motion between the metal pieces and the non-metal pieces, compared with the relative motion between the metal pieces, the wear is smaller, which is more favorable for protecting the whole elastic rod, and the service life of the elastic rod is prolonged.
The material of the flexible sheath 4 is preferably high molecular polyethylene. The axial length of the flexible protective sheath 4 is preferably greater than the axial length of the helical slot 11 to completely separate the guiding mandrel 2 and the helical slot 11.
In another aspect, the present invention provides a spinal rod system, as shown in fig. 4-5, comprising a pedicle screw 200 and a connecting rod 100, wherein the connecting rod 100 is the above-mentioned connecting rod. Since the structure is the same as above, it is not described herein again.
Further, the pedicle screw 200 may have a U-shaped groove 201 for placing the connection rod 100, the U-shaped groove 201 having an internal thread, and an anti-lock washer 202 and a compression nut 203 provided above the connection rod 100 in the U-shaped groove 201, so that the connection rod 100 can be better fixed by using the anti-lock washer 202.
Preferably, the lower end of the anti-lock washer 202 may be provided with an arc-shaped slot 2021, and the diameter of the arc-shaped slot 2021 is the same as the outer diameter of the connecting rod 100; the upper end of the anti-lock washer 202 may be provided with a groove 2022 in the same direction as the arc-shaped groove 2021, so that the connecting rod 100 is changed into a locking force when being pressed, and the elastic outer sleeve 1 of the connecting rod 100 is better ensured not to deform. The anti-lock washer 202 may be a clearance fit with the inner bore of the U-shaped channel 201 to facilitate installation.
The utility model is particularly suitable for treating lumbar diseases caused by lumbar pathological changes, slippage and trauma through the posterior approach of lumbar.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A connecting rod is characterized by comprising an elastic outer sleeve and a guide mandrel inserted in the elastic outer sleeve, wherein:
the middle part of the elastic outer sleeve is provided with a spiral groove so that the outer sleeve has elasticity, one end of the elastic outer sleeve is closed, and the other end of the elastic outer sleeve is provided with a plug-in port;
the head end of the guide mandrel is inserted into the elastic outer sleeve from the insertion port and extends to the closed end, a gap is formed between the head end of the guide mandrel and the closed end of the elastic outer sleeve, and the tail end of the guide mandrel is fixedly connected with the elastic outer sleeve.
2. A connector rod according to claim 1, wherein the tail end of the guiding mandrel is fixedly connected to the resilient outer sleeve by a fixing pin.
3. A connector rod according to claim 1, wherein the gap has a length of 2-5 mm.
4. A connector rod according to any one of claims 1 to 3, wherein said guiding mandrel is sheathed with a flexible protective sheath.
5. A connector rod of claim 4 wherein the axial length of the flexible protective sleeve is greater than the axial length of the helical slot to separate the guiding mandrel and the helical slot.
6. A connector rod according to claim 4, wherein said flexible boot is provided with a longitudinal slit.
7. A spinal rod system comprising a pedicle screw and a connector rod, wherein the connector rod is according to any one of claims 1-6.
8. A spinal rod-driving system as claimed in claim 7, wherein the pedicle screw has a U-shaped slot for receiving a connecting rod, the U-shaped slot having internal threads, the U-shaped slot having an anti-jam washer and compression nut disposed therein above the connecting rod.
9. The spinal rod-nailing system of claim 8, wherein the lower end of the anti-dead-ring washer is provided with an arc-shaped slot, and the diameter of the arc-shaped slot is the same as the outer diameter of the connecting rod.
10. A spinal rod and nail system as claimed in claim 9 wherein the upper end of the anti-jam washer is provided with a groove in the same direction as the circular arc shaped slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021727273.3U CN213310211U (en) | 2020-08-18 | 2020-08-18 | Connecting rod and spinal nail rod system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021727273.3U CN213310211U (en) | 2020-08-18 | 2020-08-18 | Connecting rod and spinal nail rod system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213310211U true CN213310211U (en) | 2021-06-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021727273.3U Active CN213310211U (en) | 2020-08-18 | 2020-08-18 | Connecting rod and spinal nail rod system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213310211U (en) |
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2020
- 2020-08-18 CN CN202021727273.3U patent/CN213310211U/en active Active
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