CN210077956U - Assembled type back locking intervertebral support - Google Patents
Assembled type back locking intervertebral support Download PDFInfo
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- CN210077956U CN210077956U CN201920461105.5U CN201920461105U CN210077956U CN 210077956 U CN210077956 U CN 210077956U CN 201920461105 U CN201920461105 U CN 201920461105U CN 210077956 U CN210077956 U CN 210077956U
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Abstract
The embodiment of the utility model discloses a matched stack formula back locking formula intervertebral supporter, including nanometer supporter and titanium alloy joint, the nanometer supporter adopts hollow elliptic cylinder form barrel, is equipped with the through-hole of symmetry setting on the preceding lateral wall of nanometer supporter, and the nail hole of symmetry setting all is equipped with from top to bottom on the back lateral wall, and the both ends of nanometer supporter all are equipped with the wing structure and the first wing nail hole of equipartition; the section of the titanium alloy joint is of an elliptic cylindrical hollow structure, the outer side face of the titanium alloy joint is a tooth surface, the inner side face of the titanium alloy joint is provided with wing-shaped jacks corresponding to the wing-shaped structures, the titanium alloy joint is provided with a second prefabricated wing nail hole, and the first wing nail hole and the second prefabricated wing nail hole are fixed through a fastener. The utility model discloses a nanometer bone supporting material is according to the high design of human vertebra centrum, and nanometer bone height-adjustable festival, and it can effectively help recovering the backbone height after the centrum excision, and the postoperative can obtain reliable stability immediately and satisfied backbone physiological curvature.
Description
Technical Field
The embodiment of the utility model provides a relate to medical instrument technical field, concretely relates to locking formula intervertebral supporter behind matched stack formula.
Background
The general principle of spinal tumor treatment is early detection and complete excision, so that surgery remains the most important and effective treatment at present. Tumor scraping and intralesional resection are used as the main operation modes of the prior spinal tumor, the local high recurrence rate and the high metastasis rate still exist after operation, and the total spinal resection and the spinal reconstruction are increasingly used for treating the primary spinal tumor and the isolated metastatic tumor along with the progress of the spinal surgery technology. The method can thoroughly eliminate the tumor in the operation and effectively reduce the pollution of the tumor to the surrounding tissues, and the spinal cord is decompressed to be beneficial to the recovery of the spinal cord function, reduce the disability rate and the recurrence rate of the tumor and improve the curative effect. So-called total spine resection, as the name suggests, requires complete resection of the diseased spine's vertebral body and all the adnexal structures, and loss of continuity and stability of the spine. The stability reconstruction of the spine after the total spine resection is also a key part of the operation, the spine is immediately stabilized after the operation, the pain can be relieved, the potential risk of spinal cord injury caused by unstable spine can be reduced, and the patient can carry out rehabilitation training in early stage and the occurrence of complications can be reduced.
The post thoracolumbar vertebrectomy reconstruction methods include filling the defect of the anterior medial column with various supports and fixing the posterior structure with a nail and rod system. According to Denis spinal three-column stabilization, the spinal three-column fixation stability after the total spine resection is optimal. At present, the reconstruction mode aiming at the thoracic and lumbar spine anterior central column defect mainly comprises massive autologous bone grafting, allogeneic decalcification bone grafting, artificial vertebral body replacement, bone cement or hydroxyapatite filling, autologous cancellous bone grains or cement combined titanium mesh implantation and the like. The bone grafting of the massive autogenous bone is once as the main means of spinal column anterior medial column reconstruction, but Liuzhong Jun et al report 1 case and utilize the massive autogenous iliac bone to reconstruct the anterior medial column structure of the 4 th lumbar vertebra, the bone grafting between the vertebral bodies subsides 1 year after the operation, the spinal stability loses. And the source of large autologous bones is limited, new trauma is caused by taking the bones, the support strength and stability are insufficient, the fusion time is long, and the graft absorption collapse and even the formation of a false joint can be caused. Compared with autogenous bone, the allogeneic bone is not easy to fuse, and the supporting strength and stability are not ideal. The artificial vertebral body and the bone cement filling can obtain the immediate stability after operation, but the long-term stability is poor due to the incapability of generating osseous fusion, and the artificial vertebral body and the bone cement filling can only be used for patients with high tumor malignancy and short life expectancy. Therefore, the researchers have proposed that the best way to reconstruct the anterior-medial column of the thoracolumbar spine is similar to the way to implant the autologous cancellous bone combined titanium mesh, and the reconstruction way is most clinically used at present. The spine of a human body has the back convex of a thoracic vertebra and the front convex of a lumbar vertebra, and the upper end plate and the lower end plate of different vertebral bodies have a certain angle on a sagittal plane, but the titanium alloy interbody fusion cage clinically used at present is parallel to each other without an angle between the upper plane and the lower plane, so that the intervertebral support cannot well fit the angle between the vertebral bodies, the fusion cage is easy to dislocate, and serious spinal cord injury is caused. And the elastic modulus of the titanium alloy is inconsistent with that of the vertebral body and has no induced osteogenesis effect, so that the problems of vertebral body collapse, intervertebral height loss, intervertebral space stenosis and the like can be caused after the operation, and the titanium alloy cannot penetrate X rays and cannot observe the growth connection and fusion condition of the trabecular bone inside the titanium alloy from an X ray film.
SUMMERY OF THE UTILITY MODEL
Therefore, the embodiment of the utility model provides a locking formula intervertebral supporter behind matched stack formula to solve the problem that preceding center pillar stability is rebuild after the full vertebra of chest lumbar vertebrae excision among the prior art.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
the utility model provides a locking formula intervertebral supporter behind matched stack formula, connects including nanometer supporter and titanium alloy, the nanometer supporter adopts cavity cylindroid form barrel, and its inside autologous bone grain that fills, be equipped with the through-hole that the symmetry set up on the preceding lateral wall of nanometer supporter, all be equipped with the nail hole that the symmetry set up from top to bottom on the back lateral wall of nanometer supporter, the both ends of nanometer supporter all are equipped with the wing structure of equipartition, be equipped with first wing nail hole on the wing structure.
The upper end and the lower end of the nanometer support body are fixedly connected with titanium alloy connectors, the cross sections of the titanium alloy connectors are of elliptic cylindrical hollow structures, the outer side faces of the titanium alloy connectors are tooth faces, wing-shaped jacks corresponding to the wing-shaped structures are arranged on the inner side faces of the titanium alloy connectors, second prefabricated wing nail holes corresponding to the first wing nail holes are formed in the titanium alloy connectors, and the first wing nail holes and the second prefabricated wing nail holes are fixed through fasteners.
In another embodiment of the present invention, the nail hole is connected to a connecting rod, and one end of the connecting rod is provided with a universal joint fixed to a rear nail rod system; the other end of the connecting rod is a threaded rod and is in threaded connection with the nail hole.
In yet another embodiment of the present invention, the nano-support has a height ranging from 40mm to 60mm, a transverse diameter ranging from 25mm to 34mm, a sagittal diameter ranging from 18mm to 26mm, and a wall thickness ranging from 3mm to 5 mm.
In yet another embodiment of the present invention, the direction of the opening between the symmetrically arranged nail holes is 30 degrees in the sagittal plane.
In another embodiment of the present invention, the inclination angle of the tooth surface ranges from 0 degree to 10 degrees, and the tooth surface is distributed with the tooth-like protrusions.
In a further embodiment of the invention, the pitch between the teeth is in the range of 3mm to 5mm and the height of the teeth is in the range of 1mm to 3 mm.
According to the utility model discloses an embodiment has following advantage:
the utility model discloses a titanium alloy connect, adopt the wedge design with the vertebra body contact surface, the number of degrees is nimble adjustable, the at utmost agree with the angle of the different sections of backbone on the sagittal plane, the contact between the vertebra no longer is point contact or partial planar contact about supporter and the backbone, but has become the complete plane contact of last lower extreme. The utility model discloses a this kind of novel dissection type design, furthest's increase the stability of supporter implantation back backbone. The utility model has the advantages of more obvious advantages when the double-segment and multi-segment vertebral bodies of the spine are removed, and the decompression range can be enlarged as much as possible for the operation.
The utility model discloses a nanometer bone supporting material is according to the high design of human vertebra centrum, and nanometer bone height-adjustable festival, and it can effectively help recovering the backbone height after the centrum excision, and the postoperative can obtain reliable stability immediately and satisfied backbone physiological curvature.
The utility model discloses use titanium alloy to connect and the bone surface contacts, great contact surface can effectively avoid collapsing of support. The utility model discloses a nanometer bone material can provide sufficient support intensity, does not have the cracked risk of support. The utility model discloses in use the metal rod to connect place ahead supporter and rear nail stick system, the postoperative can provide stable biomechanics immediately and support, provides the guarantee for the postoperative in time chemoradiotherapy to support for later stage osseointegration and lay the basis.
The utility model discloses use hollow structure, autologous bone is filled to inside, makes things convenient for the bone to grow into, improves the osseous fusion rate. And the utility model discloses the nano-support body that uses has the effect of induced osteogenesis, and good stability has also shortened the fusion time, has improved the fusion rate.
The utility model discloses can prevent that the bone grafting after the tumour relapse from appearing collapsing soon to avoid the spinal cord dysfunction who consequently causes.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is an assembly view of a assembled posterior locking intervertebral support according to an embodiment of the present invention;
FIG. 2 is a sectional view of the structure taken along line A-A in FIG. 1;
fig. 3 is a sectional view of fig. 1 from the direction B-B.
In the figure:
1. a nano-support; 2. a titanium alloy joint; 3. nailing holes; 4. a through hole; 5. a wing structure; 6. a first wing nail hole; 7. a wing-shaped jack; 8. a second prefabricated wing nail hole; 9. a fastener; 10. tooth surface.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.
As shown in fig. 1-3, an assembled posterior locking intervertebral support comprises a nano support 1 and a titanium alloy joint 2, wherein the nano support 1 is a hollow elliptic cylinder, self bone particles are filled in the hollow elliptic cylinder, the height range of the nano support 1 is 40mm-60mm, the transverse diameter range is 25mm-34mm, the sagittal diameter range is 18mm-26mm, and the wall thickness range is 3mm-5 mm. In this embodiment, the nano-support 1 is prepared from a nano-hydroxyapatite/polyamide 66(n-HA/PA66) composite bioactive material. Be equipped with the through-hole 4 that the symmetry set up on the preceding lateral wall of nano-support body 1, all be equipped with the nail hole 3 that the symmetry set up from top to bottom on the rear side wall of nano-support body 1, be no less than 4 nail holes 3 promptly, trompil direction between the nail hole 3 that the symmetry set up becomes 30 degrees on the sagittal plane, nail hole 3 connects the connecting rod, the one end of connecting rod is equipped with universal joint, and is fixed mutually with rear nail stick system, the other end of connecting rod is the threaded rod, with 3 threaded connection in nail hole, realizes the fixed connection of nano-support body 1 and rear nail stick system.
The both ends of nanometer supporter 1 all are equipped with the wing structure 5 of equipartition, be equipped with first wing nail hole 6 on the wing structure 5. The upper end and the lower end of the nanometer support body 1 are fixedly connected with a titanium alloy joint 2, the section of the titanium alloy joint 2 is of an elliptic cylindrical hollow structure, wing-shaped jacks 7 corresponding to the wing-shaped structures 5 are arranged on the inner side face of the titanium alloy joint 2, second prefabricated wing nail holes 8 corresponding to the first wing nail holes 6 are arranged on the titanium alloy joint 2, and the first wing nail holes 6 and the second prefabricated wing nail holes 8 are fixed through fasteners 9.
The outer side surface of the titanium alloy joint 2 is a tooth surface 10, the inclination angle range of the tooth surface 10 is 0-10 degrees, and the inclination of the tooth surface 10 with different degrees is matched with different curvatures of the spine. The tooth surface 10 is distributed with tooth-shaped protrusions, the range of the tooth pitch between the tooth-shaped protrusions is 3mm-5mm, the range of the tooth height is 1mm-3mm, the tooth-shaped protrusions can increase the contact surface with a vertebral body end plate, and the immediate stability of the support body is increased after pressurization.
Experiment 1: comparison of compressive and torsional strengths of the Supports
Reference group 1: a three-sided cortical ilium block;
reference group 2: a titanium cage support body;
experimental group 1: a nano-support 1.
Since the thoracolumbar total spine resection was performed clinically, physicians first thought to fill the bone defect with autologous iliac blocks. When the ilium is adopted for bone grafting, the ilium block plays a mechanical role of bearing the pressure of the front central column on one hand, and also plays a biological role of promoting intervertebral fusion on the other hand. Biological experiments prove that the compressive stress of a certain degree can promote bone fusion, so that the ilium block is required to have enough compressive strength, and the implanted osseous fusion can be ensured. However, in the process of crawling replacement of the ilium block, if the bone is absorbed quickly and new bone is formed slowly, the compressive strength of the ilium block is reduced, and when the compressive strength of the ilium block is lower than the compressive stress between vertebral bodies, the ilium block is easy to collapse and crack, so that the loss of the intervertebral height, the failure of internal fixation and other complications occur. The problem of bone defect section intervertebral support has been improved to a certain extent to the appearance of metal support afterwards, and when adopting metal supports such as titanium net to plant the bone, the effect of bearing is played to the titanium net, and autologous bone grain or artificial bone in the titanium net play the effect that promotes intervertebral fusion. The metal support effectively separates the mechanical load-bearing and biological fusion effects of the bone graft, load-bearing being the primary task, and must be designed with consideration for providing sufficient compressive strength. As shown in Table 1, the average compressive strength of the titanium mesh group is 40.12MPa, which is obviously superior to the average compressive strength of the three-side cortical ilium group of 28.71 MPa, while the compressive strength of the nano-support body 1 made of the nano-hydroxyapatite/polyamide 66(n-HA/PA66) composite bioactive material reaches 49.96 MPa, which is optimal in three-group compressive tests and can play a sufficient supporting role, and the compressive strength of the nano-support body 1 group is obviously superior to the compressive strength of the three-side cortical ilium group and the titanium cage group (P < 0.05).
Experiment 2: comparison of support torsional Strength
Reference group 1: a three-sided cortical ilium block;
reference group 1: a titanium cage support body;
experimental group 1: a nano-support 1.
As shown in the data in table 2, the average torsional strength of the three-sided cortical ilium block is 6.54MPa, the average torsional strength of the titanium cage support is 9.12MPa, the average torsional strength of the nano support 1 is 11.78MPa, and the average torsional strength of the nano support 1 group is obviously superior to the average torsional strength of the three-sided cortical ilium block group and the titanium cage group (P < 0.05).
The assembled posterior locking intervertebral support of this embodiment has an elastic modulus similar to that of cortical bone
The metal material support has been used clinically for decades, and in the thoracolumbar Enbloc resection operation, the metal support combined with the nail-rod system can quickly recover the height of the anterior central column of the spine and obtain early stability. In recent years, with the use of a large amount of metal supports, there have been many reports on the sagging, displacement, and non-fusion of metal supports. The reason is that, besides the small contact area and the large unit area pressure, the elastic modulus of the metal material is far larger than that of the cortical bone, the stress shielding effect is very obvious, the bone grafting fusion is not facilitated, and the sinking and displacement of the metal support body are easily caused. Biomechanical experiments show that the elastic modulus of the n-HA/PA66 support is similar to that of human cortical bone and is far lower than that of the titanium alloy support widely used clinically at present. Theoretically, the subsidence of the supporting body can be greatly reduced, and a good biological basis is created for the long-term stability of the bone fusion and the spine. A large number of clinical literature reports also prove that the traditional Chinese medicine composition can effectively reduce subsidence and promote bone fusion.
The assembled posterior locking intervertebral support of the embodiment has an innovative posterior locking design
In the past, either ilium has been used as a support material or a metal support used in large clinical quantities in recent years, and this is mainly achieved in intervertebral stabilization or by internal fixation and pressure fixation between adjacent vertebral bodies. When the bone grafting surface has bone absorption and the compressive stress is not enough to maintain the stability in the body, the serious consequence of support body toppling is easy to occur. The supporter can provide the good bearing effect of the preceding center pillar of backbone, and the excellent system of nail then can accomplish the firm fixed of rear structure, if we connect into a whole through the excellent system of nail of supporter and rear in the two metal connecting rods with the place ahead, its cross-section will form a similar triangle-shaped's structure, and the stability of the supporter of place ahead in theory will be strengthened greatly.
Good biocompatibility of n-HA/PA66 material
Hydroxyapatite is the main inorganic component of bone and has good biocompatibility when being implanted into a body. Through the continuous and deep research on natural bones, the bionic material combining hydroxyapatite and organic matters is continuously developed. Wang et al [38] also belong to this class of materials, as well as n-HA/PA66 complexes developed by a co-precipitation method, which are more biocompatible [38,39 ]. And the tumor tissue and the like have no damage to the biological material, and have unique advantages in clinical application. The n-HA/PA66 material support can penetrate X-ray, and the bone grafting fusion condition can be observed through X-ray film or CT scanning, so that the shielding phenomenon of metal materials is avoided.
Animal experiment research shows that after the n-HA/PA66 material support is implanted into a body, an apatite crystal layer can be formed on the surface of the support, and the support is connected with an interface between an implanted material and a receptor bone to form compact bonding. The biological material is proved to have better bone conduction biological activity.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (6)
1. An assembled type back locking type intervertebral support body is characterized in that: the titanium alloy joint comprises a nano support body and a titanium alloy joint, wherein the nano support body is a hollow elliptic cylinder, self bone particles are filled in the nano support body, through holes which are symmetrically arranged are formed in the front side wall of the nano support body, nail holes which are symmetrically arranged are formed in the upper portion and the lower portion of the rear side wall of the nano support body, wing-shaped structures which are uniformly distributed are arranged at two ends of the nano support body, and first wing nail holes are formed in the wing-shaped structures;
the upper end and the lower end of the nanometer support body are fixedly connected with titanium alloy connectors, the cross sections of the titanium alloy connectors are of elliptic cylindrical hollow structures, the outer side faces of the titanium alloy connectors are tooth faces, wing-shaped jacks corresponding to the wing-shaped structures are arranged on the inner side faces of the titanium alloy connectors, second prefabricated wing nail holes corresponding to the first wing nail holes are formed in the titanium alloy connectors, and the first wing nail holes and the second prefabricated wing nail holes are fixed through fasteners.
2. The assembled posterior locking intervertebral support of claim 1, wherein: the nail hole is connected with a connecting rod, and one end of the connecting rod is provided with a universal joint which is fixed with a rear nail rod system; the other end of the connecting rod is a threaded rod and is in threaded connection with the nail hole.
3. The assembled posterior locking intervertebral support of claim 1, wherein: the height range of the nano support body is 40mm-60mm, the transverse diameter range is 25mm-34mm, the sagittal diameter range is 18mm-26mm, and the wall thickness range is 3mm-5 mm.
4. The assembled posterior locking intervertebral support of claim 1, wherein: the opening direction between the symmetrically arranged nail holes is 30 degrees on the sagittal plane.
5. The assembled posterior locking intervertebral support of claim 1, wherein: the inclination angle range of the tooth surface is 0-10 degrees, and tooth-shaped protrusions are distributed on the tooth surface.
6. The assembled posterior locking intervertebral support of claim 5, wherein: the range of the tooth pitch between the dentations is 3mm-5mm, and the range of the tooth height is 1mm-3 mm.
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| CN201920461105.5U CN210077956U (en) | 2019-04-08 | 2019-04-08 | Assembled type back locking intervertebral support |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112998911A (en) * | 2021-04-21 | 2021-06-22 | 北京爱康宜诚医疗器材有限公司 | Titanium mesh component |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112998911A (en) * | 2021-04-21 | 2021-06-22 | 北京爱康宜诚医疗器材有限公司 | Titanium mesh component |
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