CN209789990U - Combined bone cement screw - Google Patents
Combined bone cement screw Download PDFInfo
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- CN209789990U CN209789990U CN201920099904.2U CN201920099904U CN209789990U CN 209789990 U CN209789990 U CN 209789990U CN 201920099904 U CN201920099904 U CN 201920099904U CN 209789990 U CN209789990 U CN 209789990U
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- bone cement
- nail
- connector
- connecting body
- seat
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Abstract
The utility model discloses a modular bone cement screw, including nail seat, connector and nail pole, the nail seat is equipped with the installation department that is used for the erection joint stick, the one end of connector with the nail seat is connected, the other end of connector with the one end of nail pole can be dismantled connect, just the connector can drive the nail pole rotates, be equipped with first bone cement passageway in the nail pole. This combination formula bone cement screw is through setting up modular structure for the nail seat can take out, is convenient for appear nail seat and connective bar not hard up, or nail seat and nail pole can't fix when reliable in operation in-process or postoperative, can take out the nail seat and maintain or change, improves the reliability of spinal surgery.
Description
Technical Field
The utility model relates to the technical field of medical equipment, especially, relate to a modular bone cement screw.
Background
The pedicle screw is mainly driven into the human skeleton to help the human skeleton to recover, has the function of correction, and can be used for correcting the development deformity of teenagers and the like.
Also associated with skeletal deformities is osteoporosis, the osteoporosis being osteoporosis. In most osteoporosis, the reduction of bone tissue is mainly due to increased bone resorption. The bone of osteoporosis patients is fragile compared with normal bone, and at the moment, bone cement screws are often used for fixing during the spine operation. However, after the bone cement is driven into the traditional bone cement screw, if the screw seat and the connecting rod are loosened in the operation process or after the operation, the screw seat is difficult to take out for maintenance or replacement, so that the operation failure or the operation process is more complicated.
SUMMERY OF THE UTILITY MODEL
therefore, a combined bone cement screw is needed, and the screw seat can be taken out by arranging a combined structure, so that the screw seat can be taken out for maintenance or replacement when the screw seat and the connecting rod are loosened or the screw seat and the screw rod cannot be fixed reliably in the operation process or after the operation, and the reliability of the spinal operation is improved.
The technical scheme is as follows:
On the one hand, this application provides a modular bone cement screw, including nail seat, connector and nail pole, the nail seat is equipped with the installation department that is used for installing the connective bar, the one end of connector with the nail seat is connected, the other end of connector with the one end of nail pole can be dismantled connect, just the connector can drive the nail pole rotates, be equipped with a bone cement passageway in the nail pole.
When the combined bone cement screw is applied to a spine operation, the screw seat or the connector is rotated to drive the screw rod to be screwed into the preset vertebral pedicle of the spine, then the connector is taken down to separate the screw seat from the screw rod, and at the moment, bone cement can be injected through the first bone cement channel, so that the reliability of fixing the screw rod on the vertebral pedicle is improved, and the condition that the screw rod is not firmly fixed due to osteoporosis is avoided; then the connecting body is arranged on the nail rod, the nail seat is also arranged on the nail rod at the moment, and then the connecting rod can be arranged by utilizing the mounting part. If the nail seat and the connecting rod are loosened or the nail seat and the nail rod cannot be fixed reliably in the operation process or after the operation, the connecting body can be separated from the nail rod, the nail seat is taken out for maintenance or replacement, and then the installation is carried out, so that the reliability of the spinal operation can be improved.
The technical solution is further explained below:
In one embodiment, the connecting body is screwed with the nail rod.
In one embodiment, the connecting body is provided with a first external thread structure, the nail rod is provided with a first internal thread hole matched with the first external thread structure, and the first internal thread hole is arranged in the first bone cement channel.
In one embodiment, the end of the first male thread formation is provided with a lead-in having a diameter smaller than the smallest diameter of the first male thread formation.
In one embodiment, the nail rod is further provided with at least two through holes, and the through holes are communicated with the first bone cement channel. Thus, the outlets of at least two first bone cement channels can be formed through the through holes, so that the distribution of bone cement is more reasonable, and the fixation of the nail rod is more reliable; and the inner bone can grow into the through hole, so that the holding force is further enhanced, and the reliability of the operation recovery is ensured.
In one embodiment, the inner wall of the through hole is provided with a barb structure. So utilize barb structure for nail pole is connected more firmly with the interior bone of embedding in it, improves the fixed reliability of nail pole.
In one embodiment, one end of the connecting body is rotatably connected with the nail seat; or/and the connecting body is provided with a second bone cement channel which penetrates through two ends of the connecting body, and the second bone cement channel is communicated with the first bone cement channel. Therefore, one end of the connecting body is rotatably connected with the nail seat, so that the angle of the nail seat relative to the nail rod can be adjusted, different operation requirements can be further met, and the connecting rod can be more conveniently installed; the connecting body is also provided with a second bone cement channel, so that the connecting body does not need to be disassembled, and when bone cement injection is carried out, the second bone cement channel is used for introducing the bone cement into the first bone cement channel.
In one embodiment, one end of the connecting body is detachably connected with the nail seat; or/and one end of the connecting body is provided with a connecting part.
In one embodiment, the outer surface of the shank is coated with a first coating capable of promoting bone growth or/and a second coating capable of increasing bone cell affinity. This may better facilitate post-operative recovery.
In one embodiment, the mounting portion is provided with a second internal thread hole and two strip-shaped grooves which are arranged through the side wall of the second internal thread hole, and the two strip-shaped grooves are symmetrically arranged.
Drawings
FIG. 1 is an exploded view of the modular bone cement screw shown in one embodiment;
FIG. 2 is a schematic half-sectional view of a modular bone cement screw according to one embodiment;
FIG. 3 is an exploded view of the modular bone cement screw according to one embodiment;
Fig. 4 is a schematic half-sectional view of a modular bone cement screw according to an embodiment.
Description of reference numerals:
100. The nail seat, 110, the second internal thread hole, 120, the bar groove, 200, the connector, 210, the first external screw thread structure, 220, the introduction part, 230, the second bone cement channel, 240, the connecting part, 300, the nail pole, 310, the first bone cement channel, 320, the first internal thread hole, 330, the through hole, 400, the fastening ring 400.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "secured to," "disposed on," "secured to," or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, when one element is considered to be "detachably connected" to another element, connection means such as sleeving, clamping, screwing and the like can be adopted, and a specific structure can be realized in the prior art, so that the operation is not burdensome. When an element is perpendicular or nearly perpendicular to another element, it is desirable that the two elements are perpendicular, but some vertical error may exist due to manufacturing and assembly effects. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The references to "first" and "second" in the present invention do not denote any particular quantity or order, but rather are merely used to distinguish one name from another.
As shown in fig. 1 and fig. 2, in the present embodiment, a combined bone cement screw is provided, which includes a screw seat 100, a connector 200 and a screw rod 300, wherein the screw seat 100 is provided with an installation portion (not labeled) for installing a connection rod, one end of the connector 200 is connected to the screw seat 100, the other end of the connector 200 is detachably connected to one end of the screw rod 300, and the connector 200 can drive the screw rod 300 to rotate, and a first bone cement channel 310 is provided in the screw rod 300.
As shown in fig. 1 and 2, when the combined bone cement screw is applied to a spinal surgery, the screw seat 100 or the connector 200 is rotated to drive the screw rod 300 to be screwed into a preset pedicle of a vertebra, and then the connector 200 is removed to separate the screw seat 100 from the screw rod 300, so that bone cement can be injected through the first bone cement channel 310, thereby improving the reliability of the fixation of the screw rod 300 on the pedicle of the vertebra, and avoiding the insecure fixation of the screw rod 300 caused by osteoporosis; then, the connector 200 is mounted on the nail shaft 300, and the nail holder 100 is also mounted on the nail shaft 300, and then the connection rod can be mounted by using the mounting portion. If the nail seat 100 and the connecting rod are loosened or the nail seat 100 and the nail rod 300 cannot be fixed reliably during or after the operation, the connecting body 200 and the nail rod 300 can be separated, the nail seat 100 can be taken out for maintenance or replacement, and then the installation is carried out, so that the reliability of the spinal operation can be improved.
When the nail seat 100 is fixedly connected with the connecting body 200, the nail rod 300 can be driven to rotate through the connecting body 200 only by rotating the nail seat 100 (the connecting body 200 indirectly drives the nail rod 300 to rotate); when the nail seat 100 is rotatably connected to the connecting body 200, the connecting body 200 is driven to drive the nail shaft 300 to rotate (the connecting body 200 directly drives the nail shaft 300 to rotate).
in addition to the above embodiments, in one embodiment, the connector 200 is screwed to the nail shaft 300. Therefore, the connection between the connector 200 and the nail rod 300 is more reliable, and the connector 200 and the nail rod 300 are connected into a whole, so that the strength of the nail rod 300 is not reduced, and the nail rod has good reliability and safety.
In addition to any of the above embodiments, as shown in fig. 1 and 2, in one embodiment, the connecting body 200 is provided with a first external thread structure 210, the nail shaft 300 is provided with a first internal thread hole 320 matched with the first external thread structure 210, and the first internal thread hole 320 is disposed in the first bone cement passage 310. Thus, the detachable connection of the connector 200 and the nail rod 300 is realized by utilizing the first external thread structure 210 and the first internal thread hole 320, the operation is simple, the existing operation flow is not influenced, and the operator can conveniently and quickly grasp the operation.
As shown in fig. 1 and 2, in an embodiment, an end of the first male thread structure 210 is provided with an introduction portion 220, and a diameter of the introduction portion 220 is smaller than a minimum diameter of the first male thread structure 210. Thus, the introduction portion 220 is provided to facilitate the accuracy and rapidity of the screw-coupling of the connector 200 and the shank 300.
In addition to any of the above embodiments, as shown in fig. 2 or 4, in one embodiment, the nail shaft 300 is further provided with at least two through holes 330, and the through holes 330 are communicated with the first bone cement passage 310. Thus, at least two outlets of the first bone cement channel 310 can be formed through the through holes 330, so that the distribution of the bone cement is more reasonable, and the fixation of the nail rod 300 is more reliable; and the inner bone can grow into the through hole 330, further enhancing the holding force and ensuring the reliability of the operation recovery.
On the basis of the above embodiments, in one embodiment, the inner wall of the through hole 330 is provided with a barb structure (not shown). So utilize barb structure for nail pole 300 is connected more firmly with the interior bone of embedding in it, improves the fixed reliability of nail pole 300.
Further, at least two through holes 330 are formed in a group at intervals along the same circumference. By the design, after the inner bone grows, the connection with the nail rod 300 is reliable in the circumferential direction, and the stress is uniform. Specifically, the center lines of two adjacent through holes 330 are perpendicular or approximately perpendicular to each other in the same group. And the through-hole 330 may be one of a through-hole 330 or a blind hole.
further, at least two sets of through holes 330 are spaced apart along the length of the shank 300. Thus, after the inner bone grows, the nail rod 300 can be inserted into the nail rod 300 through the through hole 330 along the length direction of the nail rod 300, so that the nail rod 300 is reliably connected with the inner bone.
As shown in fig. 3 and 4, in one embodiment, an end of the connecting body 200 is rotatably connected to the nail seat 100 based on any of the above embodiments. Thus, one end of the connecting body 200 is rotatably connected with the nail seat 100, so that the angle of the nail seat 100 relative to the nail rod 300 can be adjusted, and further different operation requirements can be met, and the connecting rod can be more conveniently installed; when the connecting rod is fastened, the connecting body 200 is not rotatable with respect to the nail holder 100 by the pressing force of the connecting rod. Specifically, the rotatable connection is not limited to the one shown in the drawings, and other existing connection methods meeting the use requirements can be adopted.
As shown in fig. 3 and 4, in an embodiment, a fastening ring 400 is disposed between the connecting body 200 and the nail seat 100. In this way, the connecting body 200 can be pressed by the fastening ring 400, so that the connecting body 200 and the nail holder 100 cannot rotate, and particularly, after the connecting rod is fastened, the connecting rod can press the fastening ring 400, so that the connecting body 200 cannot rotate relative to the nail holder 100.
As shown in FIG. 4, in addition to any of the above embodiments, in one embodiment, the connecting body 200 is provided with a second bone cement passage 230 penetrating both ends thereof, and the second bone cement passage is communicated with the first bone cement passage 310. Through being equipped with second bone cement passageway 230 on the connecting body, need not to dismantle the connecting body like this, also when carrying out bone cement injection, utilize second bone cement passageway 230 to introduce bone cement in first bone cement passageway 310.
In addition to any of the above embodiments, in one embodiment, one end of the connecting body 200 is detachably connected to the nail seat 100. Thus, when the connector 200 is damaged, it can be disassembled and replaced. In particular the detachable connection can be implemented in any of the prior art solutions that meet the above-mentioned requirements.
as shown in fig. 2 or fig. 4, in an embodiment based on any of the above embodiments, a connecting portion 240 is disposed at one end of the connecting body 200. Thus, the operation tool can be connected to the connection portion 240 in a transmission manner, so as to drive the connection body 200 to rotate. Specifically, the connecting portion 240 may be an inner polygonal hole, such as an inner triangular hole, an inner hexagonal hole, or the like.
In addition to any of the above embodiments, in one embodiment, the outer surface of the shank 300 is coated with a first coating (not shown) that promotes bone growth and/or a second coating (not shown) that increases bone cell affinity. This may better facilitate post-operative recovery. The first coating and the second coating can be disposed on the nail rod 300 by means of spraying, coating and other prior art means, and the material of the first coating and the second coating can be obtained by means of the prior art, which is not described herein again. In the implementation process, only the first coating or the second coating can be coated, or the first coating and the second coating can be coated simultaneously.
In addition, in one embodiment, the nail shaft 300 is made of a medical implant material, such as titanium alloy, cobalt-chromium-molybdenum alloy, and the like.
As shown in fig. 1 and 2, in one embodiment, in addition to any of the above embodiments, the mounting portion is provided with a second female screw hole 110 and two grooves 120 penetrating through the side wall of the second female screw hole 110, and the two grooves 120 are symmetrically arranged. So, can wear to locate the connective bar on nail seat 100 through two bar grooves 120, then utilize fastening nut and the fastening cooperation in second internal thread hole 110, set firmly the connective bar on nail seat 100.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. The utility model provides a modular bone cement screw, its characterized in that, includes nail seat, connector and nail pole, the nail seat is equipped with the installation department that is used for the erection joint stick, the one end of connector with the nail seat is connected, the other end of connector with the nail pole can be dismantled the connection, just the connector can drive the nail pole rotates, be equipped with first bone cement passageway in the nail pole.
2. The combination bone cement screw according to claim 1, wherein the connector is threadedly connected to the shank.
3. The combined bone cement screw according to claim 1, wherein the connecting body is provided with a first external thread structure, the shank is provided with a first internal thread hole which is matched with the first external thread structure, and the first internal thread hole is arranged in the first bone cement channel.
4. The combination bone cement screw according to claim 3, wherein the end of the first external thread structure is provided with a lead-in portion having a diameter smaller than the smallest diameter of the first external thread structure.
5. The combined bone cement screw according to claim 1, wherein the shank is further provided with at least two through holes, the through holes communicating with the first bone cement channel.
6. the combined bone cement screw according to claim 5, wherein the inner wall of the through-hole is provided with a barb structure.
7. The combined bone cement screw according to claim 1, wherein one end of the connecting body is rotatably connected with the nail seat; or/and the connecting body is provided with a second bone cement channel which penetrates through two ends of the connecting body, and the second bone cement channel is communicated with the first bone cement channel.
8. The combined bone cement screw according to claim 1, wherein one end of the connecting body is detachably connected with the nail seat; or/and one end of the connecting body is provided with a connecting part.
9. The combined bone cement screw according to claim 1, characterized in that the outer surface of the shank is coated with a first coating capable of promoting the growth of bone material or/and a second coating capable of increasing the affinity of bone cells.
10. The combined bone cement screw according to any one of claims 1 to 9, wherein the mounting portion is provided with a second internal threaded hole and two strip-shaped grooves provided through a side wall of the second internal threaded hole, the two strip-shaped grooves being symmetrically provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920099904.2U CN209789990U (en) | 2019-01-22 | 2019-01-22 | Combined bone cement screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920099904.2U CN209789990U (en) | 2019-01-22 | 2019-01-22 | Combined bone cement screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209789990U true CN209789990U (en) | 2019-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920099904.2U Active CN209789990U (en) | 2019-01-22 | 2019-01-22 | Combined bone cement screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209789990U (en) |
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2019
- 2019-01-22 CN CN201920099904.2U patent/CN209789990U/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: 20230626 Address after: No. 27, Shan Dana Road, Ji'nan, Shandong Province, Shandong Patentee after: SHANDONG University Patentee after: QILU HOSPITAL OF SHANDONG University (QINGDAO) Address before: Department of Orthopedics, Qilu Hospital, No. 107 Wenhua West Road, Jinan City, Shandong Province, 250000 Patentee before: Zheng Yanping |
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| TR01 | Transfer of patent right |