CN214414984U - Cervical vertebra intervertebral height maintaining device with shock-absorbing implant-bone interface load effect - Google Patents
Cervical vertebra intervertebral height maintaining device with shock-absorbing implant-bone interface load effect Download PDFInfo
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- CN214414984U CN214414984U CN202022248685.5U CN202022248685U CN214414984U CN 214414984 U CN214414984 U CN 214414984U CN 202022248685 U CN202022248685 U CN 202022248685U CN 214414984 U CN214414984 U CN 214414984U
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Abstract
The utility model provides a cervical vertebra intervertebral height maintainer with bradyseism implant-bone interface load effect relates to the medical instrument field, has solved the problem that has more complication when current false body uses, the utility model discloses a body, the top surface of body is the cambered surface of epirelief, the bottom surface of body is the cambered surface of underbending. The utility model discloses a contact of upper and lower cambered surface and end plate can provide good stability and support, reduces the false body that the false body mismatch leads to and sinks, closes on complication such as segment degeneration, reduces the fine motion between implant-the bone interface, promotes osseointegration.
Description
Technical Field
The utility model relates to the field of medical equipment, specific cervical vertebra intervertebral height maintainer with bradyseism implant-bone interface load effect that says so.
Background
Cervical spondylosis is a common degenerative disease in which pathological changes caused by degenerative changes of cervical intervertebral discs involve peripheral tissue structures and produce clinical symptoms. Epidemiological results show that the incidence rate of the cervical spondylosis in China is about 17.4%, and in recent years, with the popularization of smart phones and various electronic products, the incidence rate of the cervical spondylosis is gradually increased year by year and the incidence age tends to be younger. The cervical spondylodiscectomy fusion (ACDF) is the classic technique for treating cervical spondylosis at present, but has many complications, such as an adjacent vertebra disease, a pseudoarthrosis, prosthesis subsidence and loosening, and the like.
There are a number of reports in the literature that after anterior disc resection fusion, there is micromotion between the implant-bone interface of the neck in different postures, the load caused by the micromotion is an important factor influencing the osseointegration, the micromotion phenomenon can cause the loss of different degrees of the intervertebral space height of a patient after the ACDF operation, some complications such as the subsidence and the looseness of a prosthesis can even occur, the operation needs to be performed again, how to maintain the intervertebral space height and reduce the micromotion between an implant and a bone interface so as to promote the osseointegration after the ACDF operation is a problem which is still not solved by spinal surgeons so far, however, the current prosthesis designs have certain application limitations, and have not been effective in solving the problem, therefore, a prosthesis that provides good stability and support while reducing micro-motion between the implant-bone interface and promotes osseointegration is important.
The existing intervertebral fusion cage is made of medical alloy, high molecular polymer and other biological materials, although the design can provide better rigidity, due to lack of elasticity, the intervertebral fusion cage cannot meet slight movement of an implant-bone interface in the using process, so that local stress is concentrated, in addition, the shapes of the end plates of each patient have larger difference in radian, depth and the like, clinically, imported and batch-produced prostheses are commonly used, the upper surface and the lower surface of the prostheses are planes, the embedded end plates have certain radian, gaps with different degrees often exist between the end plates and the implant in practical application, and the biomechanical change and the bone integration effect of adjacent segments are further aggravated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to design a cervical vertebra intervertebral height maintaining device with the load effect of bradyseism implant-bone interface, can provide good stability and support, reduce the prosthesis that the prosthesis mismatch leads to sink, close on complications such as segment degeneration, reduce the fine motion between implant-bone interface, promote osseointegration.
The utility model discloses a following technical scheme realizes:
the cervical vertebra intervertebral height maintaining device with the cushioning implant-bone interface load effect comprises a body, wherein the top surface of the body is an upwards-convex cambered surface, and the bottom surface of the body is a downwards-convex cambered surface.
When the structure is arranged, the top surface and the bottom surface of the cervical vertebra intervertebral height retainer are both convex cambered surfaces, the design is more suitable for anatomy and biomechanical performance, the intervertebral space height and the end plate shape of a patient can be better adapted, the matching degree of the prosthesis is improved, the contact surface of an inner plant-bone interface is increased, good stability and support are provided, complications such as prosthesis sinking and adjacent segment degeneration caused by prosthesis mismatching are reduced, the micromotion between the implant and the bone interface is reduced, and bone integration is promoted.
Further for better realization the utility model discloses, adopt the following structure that sets up very much: the body is a compressible elastomeric structural member.
When the structure is adopted, the cervical vertebra intervertebral height maintaining device is an elastic body structural part with a buffering effect, can realize a cushioning effect, reduce slight movement between an implant and a bone interface, disperse local stress and promote osseointegration.
Further for better realization the utility model discloses, adopt the following structure that sets up very much: the body comprises an upper plate, a lower plate and a middle buffer structure;
the bottom surface of the upper plate is connected with the top surface of the middle buffer structure, and the top surface of the upper plate is an upward convex cambered surface;
the top surface of the lower plate is connected with the bottom surface of the middle buffering structure, and the bottom surface of the lower plate is a downward convex arc surface;
the intermediate cushioning structure is a compressible elastomeric structural member.
Further for better realization the utility model discloses, adopt the following structure that sets up very much: the upper plate and the lower plate are hard structural members.
When the structure is arranged, the upper plate and the lower plate of the intervertebral height maintaining device are hard structural members, good rigidity is provided for the body, the middle buffering structure of the intervertebral height maintaining device is an elastic structural member with a buffering effect, a cushioning effect is achieved, slight movement between an inner plant and a bone interface can be reduced, local stress is dispersed, and osseointegration is promoted.
Further for better realization the utility model discloses, adopt the following structure that sets up very much: the upper plate and the lower plate are titanium alloy structural members.
Further for better realization the utility model discloses, adopt the following structure that sets up very much: the middle buffer structure is made of polyurethane elastomer.
When the structure is adopted, the intervertebral height maintaining device caters to the micro-motion state between the implant and the bone interface by skillfully combining the titanium alloy structural part and the polyurethane elastomer, has good supporting force, promotes osseointegration and reduces a series of complications caused by mismatching of the prosthesis. Meanwhile, the manufacturing cost of the material selection of the intervertebral height maintainer is lower than that of the existing imported prosthesis, so that the economic burden of a patient can be reduced.
Further for better realization the utility model discloses, adopt the following structure that sets up very much: the surface of the upper plate and/or the surface of the lower plate are/is coated with a nano hydroxyapatite coating respectively.
When the structure is adopted, the nano hydroxyapatite coatings positioned on the surfaces of the upper plate and the lower plate can promote the plate-bone interface osseous fusion.
Further for better realization the utility model discloses, adopt the following structure that sets up very much: the upper plate and the lower plate are respectively provided with at least one hole.
When the arrangement structure is adopted, the holes arranged on the upper plate and the lower plate can allow bones to grow in during use, and the bonding force between the intervertebral height maintainer and the end plate is further improved.
Further for better realization the utility model discloses, adopt the following structure that sets up very much: the top surface of the upper plate and the bottom surface of the lower plate are respectively provided with at least one raised tooth-shaped structure.
When the arrangement structure is adopted, the arrangement of the tooth-shaped structure can ensure that the intervertebral height maintaining device can penetrate into the bony endplate after being implanted, thereby providing immediate stability and preventing the intervertebral height maintaining device from shifting with the bone boundary.
Further for better realization the utility model discloses, adopt the following structure that sets up very much: the top surface of the upper plate and the bottom surface of the lower plate are respectively provided with four raised tooth-shaped structures which are uniformly distributed.
When the arrangement structure is adopted, the four tooth-shaped structures are provided according to experience, and the optimal instant stabilizing effect can be achieved.
Further for better realization the utility model discloses, adopt the following structure that sets up very much: the middle buffer structure is internally provided with a reticular hollow structure.
When the structure is arranged, after the net-shaped hollow structure is arranged in the middle buffering structure, the rigidity and the elasticity of the middle buffering structure can be adjusted according to the condition of a patient before an operation by adjusting the porosity and the number of the small holes. The middle buffer structure can cater to the slight movement state of the implant-bone interface while providing good support, realizes the cushioning effect, reduces the slight movement between the implant-bone interface and promotes the osseointegration.
Further for better realization the utility model discloses, adopt the following structure that sets up very much: the size of the body is designed according to preoperative imaging parameters of a patient, so that the body is matched with the intervertebral space height and the end plate shape of the patient;
the size of the upper plate and the radian of the top surface of the upper plate are designed according to preoperative imaging parameters of a patient, and the upper plate is integrally printed and formed by using a 3D printing technology;
the size of the lower plate and the radian of the top surface of the lower plate are designed according to preoperative imaging parameters of a patient, and the lower plate is integrally printed and formed by using a 3D printing technology.
By adopting the arrangement, the intervertebral height maintaining device can better accord with the anatomical and biomechanical properties, and simultaneously, the size and the surface radian of the upper plate and the lower plate of the intervertebral height maintaining device can be matched with the intervertebral space height and the end plate form of a patient according to the preoperative anatomical parameters of the patient by utilizing the 3D printing technology, so that the intervertebral height maintaining device can be individually designed according to the personal condition of the patient, the aim of non-polishing of the prosthesis in the operation can be fulfilled, and the complications of prosthesis sinking, adjacent segment degeneration and the like caused by the mismatch of the prosthesis can be reduced.
Further for better realization the utility model discloses, adopt the following structure that sets up very much: the joint surfaces of the upper plate, the lower plate and the middle buffer structure are fixedly connected through hydrogel.
The utility model has the advantages of it is following and beneficial effect:
the utility model discloses in, this cervical vertebra intervertebral height maintainer's top surface and bottom surface are convex cambered surface, and this kind of design more accords with anatomy and biomechanics performance, can more adapt to patient's intervertebral space height and end plate shape, improves the false body matching degree, increases interior plant-bone interface contact surface, provides good stability and support, reduces the false body that the false body mismatch leads to and sinks, closes on complication such as segment degeneration, reduces the fine motion between implant-the bone interface, promotes the bone integration.
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 is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of a cervical intervertebral height maintainer;
FIG. 2 is a disassembled view of the cervical intervertebral height maintainer;
labeled as:
1. an upper plate; 2. a lower plate; 3. an intermediate buffer structure; 4. a tooth-shaped structure; 5. and (4) holes.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as the case may be, by those of ordinary skill in the art.
Example 1:
the cervical vertebra intervertebral height maintaining device with the shock absorption implant-bone interface load effect can provide good stability and support, reduce the complications of prosthesis sinking, adjacent segment degeneration and the like caused by prosthesis mismatching, reduce the micromotion between the implant-bone interface and promote osseointegration, and is particularly arranged into the following structures:
the cervical vertebra intervertebral height maintainer is of an integrated structure, the whole body of the cervical vertebra intervertebral height maintainer is a hard structural member made of medical alloy, high polymer and other biological materials, and the upper part and the lower part of the cervical vertebra intervertebral height maintainer are provided with cambered surfaces. Specifically, the top surface of the cervical vertebra intervertebral height maintaining device is an upward convex cambered surface, and the bottom surface of the cervical vertebra intervertebral height maintaining device is a downward convex cambered surface. The top surface and the bottom surface of the cervical vertebra intervertebral height maintaining device are convex cambered surfaces, the design is more suitable for the anatomy and biomechanical performance, the intervertebral space height and the end plate shape of a patient can be better adapted, the matching degree of the prosthesis is improved, the contact surface of an inner plant-bone interface is increased, good stability and support are provided, the complications such as prosthesis sinking and adjacent segment degeneration caused by the mismatch of the prosthesis are reduced, the micromotion between the implant and the bone interface is reduced, and the bone integration is promoted.
Example 2:
the cervical vertebra intervertebral height maintaining device with the shock absorption implant-bone interface load effect can provide good stability and support, reduce the complications of prosthesis sinking, adjacent segment degeneration and the like caused by prosthesis mismatching, reduce the micromotion between the implant-bone interface and promote osseointegration, and is particularly arranged into the following structures as shown in fig. 1 and fig. 2:
the cervical intervertebral height maintaining device is a compressible elastic body structural part, can be an integral structural part with certain elasticity, also can be an assembly structural part formed by combining a plurality of parts, and at least one part in the plurality of parts needs to have elasticity.
The present embodiment preferably designs the cervical intervertebral height maintainer as a combined structural member. Specifically, the cervical intervertebral height maintaining device comprises an upper plate 1, a lower plate 2 and a middle buffer structure 3. The bottom surface of the upper plate 1 is connected with the top surface of the middle buffer structure 3 through the super-strong interface bonding hydrogel, the top surface of the upper plate 1 is an upward convex cambered surface, the top surface of the lower plate 2 is connected with the bottom surface of the middle buffer structure 3 through the super-strong interface bonding hydrogel, and the bottom surface of the lower plate 2 is a downward convex cambered surface. The upper plate 1, the lower plate 2 and the middle buffer structure 3 are combined to form a combined structural member with upper and lower protrusions, and the side part of the middle buffer structure 3 is preferably flush with the side edges of the upper plate 1 and the lower plate 2 when not pressed. Wherein, the upper plate 1 and the lower plate 2 are hard structural members, such as titanium alloy structural members. The intermediate cushioning structure 3 is a compressible elastomeric structure, such as a polyurethane elastomer, which is characterized by a woven material with high elasticity, high strength and plastic deformation, and is widely used in the medical field, such as artificial blood vessels and artificial menisci.
When the structure is arranged, the cervical vertebra intervertebral height maintaining device is a combined elastic body structural part with a buffering effect, can realize a cushioning effect, reduce slight movement between an implant and a bone interface, disperse local stress and promote osseointegration. The upper plate 1 and the lower plate 2 of the intervertebral height maintaining device are hard structural members and provide good rigidity for the body, and the middle buffering structure 3 of the intervertebral height maintaining device is an elastomer structural member with a buffering effect, so that a cushioning effect is realized, slight movement between an inner plant-bone interface can be reduced, local stress is dispersed, and osseointegration is promoted. The intervertebral height maintainer caters to the micro-motion state between an implant-bone interface by skillfully combining a titanium alloy structural part and a polyurethane elastomer, promotes osseointegration while having good supporting force, and reduces a series of complications caused by mismatching of prostheses. Meanwhile, the manufacturing cost of the material selection of the intervertebral height maintainer is lower than that of the existing imported prosthesis, so that the economic burden of a patient can be reduced.
As a preferable scheme of the upper plate 1 and the lower plate 2 in this embodiment, the surface of the upper plate 1 and the surface of the lower plate 2 are coated with nano-hydroxyapatite coatings, respectively, so that the cervical interbody height maintainer can promote the bony fusion of the plate-bone interface after being implanted due to the existence of the nano-hydroxyapatite coatings.
Example 3:
this embodiment is further optimized on the basis of above-mentioned embodiment, and further for better realization the utility model discloses, adopt the following structure that sets up very much:
the upper plate 1 and the lower plate 2 may be provided with the holes 5 separately or with the serrations 4 separately or with both the holes 5 and the serrations 4. The present embodiment preferably provides both holes 5 and teeth 4 on the upper plate 1 and the lower plate 2.
Specifically, the upper plate 1 and the lower plate 2 are respectively provided with a plurality of holes 5, the number of the holes 5 is preferably set to be a plurality, so that the upper plate 1 and the lower plate 2 are of a porous structure, the holes 5 arranged on the upper plate 1 and the lower plate 2 can allow bone growth in use, and the bonding force between the intervertebral height maintaining device and the end plate is further improved.
The top surface of the upper plate 1 and the bottom surface of the lower plate 2 are respectively processed with the same number of raised tooth-shaped structures 4, the number of the tooth-shaped structures 4 is preferably four according to experience, and the four tooth-shaped structures 4 can be straight tooth structures or barb structures, and are uniformly distributed on the upper plate 1 and the lower plate 2. The arrangement of the tooth-shaped structure 4 can ensure that the intervertebral height maintainer can penetrate into the bony endplate after being implanted, thereby providing immediate stability and preventing the intervertebral height maintainer from being displaced from the bone boundary. The four tooth-like structures 4, given empirically, are able to achieve an optimal immediate stabilizing effect. The height of the teeth 4 and the distance between them can be adjusted in the computer aided design software according to the image data of the patient before operation.
Example 4:
this embodiment is further optimized on the basis of above-mentioned embodiment, and further for better realization the utility model discloses, adopt the following structure that sets up very much:
the middle buffer structure 3 is a polyurethane elastomer with a mesh hollow structure inside. After the inside of middle buffer structure 3 sets up netted hollow out construction, can adjust buffer structure 3's rigidity and elasticity in the middle of according to the patient's condition through adjustment porosity and aperture quantity before the art, provide individualized design for the patient. The middle buffer structure 3 can cater to the slight movement state of the implant-bone interface while providing good support, realize the cushioning effect, reduce the slight movement between the implant-bone interface and promote the osseointegration.
Example 5:
this embodiment is further optimized on the basis of above-mentioned embodiment, and further for better realization the utility model discloses, adopt the following structure that sets up very much:
the upper plate 1, the lower plate 2 and the middle buffer structure 3 of the cervical intervertebral height maintainer in the embodiment are designed and manufactured by adopting a 3D printing technology. The sizes of the upper plate 1, the lower plate 2 and the middle buffer structure 3 are designed according to the preoperative imaging parameters of the patient, so that the cervical vertebra intervertebral height maintainer is matched with the intervertebral space height and the end plate shape of the patient. Specifically, the size of the upper plate 1 and the radian of the top surface of the upper plate are designed according to preoperative imaging parameters of a patient, and the upper plate is designed through computer aided design software by utilizing the existing 3D printing technology and then is integrally printed and formed through a 3D printer. The size of the lower plate 2 and the radian of the top surface of the lower plate are designed according to preoperative imaging parameters of a patient, and the lower plate is designed through computer aided design software by utilizing the existing 3D printing technology and then is integrally printed and formed through a 3D printer. The size of the middle buffer structure 3 is designed according to preoperative imaging parameters of a patient, and the porosity of the mesh hollow structure is designed and adjusted according to the preoperative imaging parameters of the patient so as to adjust the elasticity and the strength of the buffer material. Therefore, the intervertebral height maintaining device can better accord with the anatomy and biomechanical performance, simultaneously, the size and the surface radian of the upper plate 1 and the lower plate 2 of the intervertebral height maintaining device can be matched with the intervertebral space height and the end plate shape of a patient according to the preoperative anatomy parameters of the patient by utilizing the 3D printing technology, the individualized design of the intervertebral height maintaining device according to the individual condition of the patient is realized, the aim of not polishing the prosthesis in the operation can be realized, and the complications of prosthesis sinking, adjacent segment degeneration and the like caused by the mismatch of the prosthesis can be reduced.
The invention has years of basic and clinical experience of cervical vertebra surgery, has deeper understanding on the design and application of implants in cervical vertebra, designs the intervertebral height maintaining device which is more in line with cervical vertebra anatomy and biomechanics and has the load effect of a shock absorption implant-bone interface according to years of operation experience, caters to the slight motion state between the implant and the bone interface through the ingenious combination of titanium alloy and polyurethane elastomer, better matches end plates through upper and lower cambered surfaces, and finally utilizes the 3D printing technology to truly realize the individuation of the cervical vertebra prosthesis, thereby promoting the bone integration and reducing a series of complications caused by prosthesis mismatching while providing good supporting force.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention.
Claims (8)
1. Cervical vertebra intervertebral height maintainer with bradyseism implant-bone interface load effect which characterized in that: the anti-theft device comprises a body, wherein the top surface of the body is an upwards convex cambered surface, and the bottom surface of the body is a downwards convex cambered surface;
the body is a compressible elastomer structural member;
the body comprises a hard upper plate (1), a hard lower plate (2) and an intermediate buffer structure (3);
the bottom surface of the upper plate (1) is connected with the top surface of the middle buffer structure (3), and the top surface of the upper plate (1) is an upward convex cambered surface;
the top surface of the lower plate (2) is connected with the bottom surface of the middle buffer structure (3), and the bottom surface of the lower plate (2) is a downward convex cambered surface;
the middle buffer structure (3) is a compressible elastomer structural member.
2. The intervertebral height maintainer with cushioning implant-bone interface loading effect of claim 1, wherein: the middle buffer structure (3) is a polyurethane elastomer.
3. The intervertebral height maintainer with cushioning implant-bone interface loading effect of claim 1, wherein: the surface of the upper plate (1) and/or the surface of the lower plate (2) are coated with a nano-hydroxyapatite coating.
4. The intervertebral height maintainer with cushioning implant-bone interface loading effect of claim 1, wherein: the upper plate (1) and the lower plate (2) are respectively provided with at least one hole (5).
5. The intervertebral height maintainer with cushioning implant-bone interface loading effect of claim 1, wherein: the top surface of the upper plate (1) and the bottom surface of the lower plate (2) are respectively provided with at least one raised tooth-shaped structure (4).
6. The intervertebral height maintainer with cushioning implant-bone interface loading effect of claim 5, wherein: the top surface of the upper plate (1) and the bottom surface of the lower plate (2) are respectively provided with four raised tooth-shaped structures (4) which are uniformly distributed.
7. The intervertebral height maintainer with cushioning implant-bone interface loading effect of claim 1, wherein: the middle buffer structure (3) is internally provided with a reticular hollow structure.
8. The intervertebral height maintainer with a cushioning implant-bone interface loading effect of any one of claims 1-7, wherein: the size of the body is designed according to preoperative imaging parameters of a patient, so that the body is matched with the intervertebral space height and the end plate shape of the patient;
the size of the upper plate (1) and the radian of the top surface of the upper plate are designed according to preoperative imaging parameters of a patient, and the upper plate is integrally printed and formed by using a 3D printing technology;
the size of the lower plate (2) and the radian of the top surface of the lower plate are designed according to preoperative imaging parameters of a patient, and the lower plate is integrally printed and formed by a 3D printing technology.
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| CN112089510A (en) * | 2020-10-12 | 2020-12-18 | 四川大学华西医院 | Cervical vertebra intervertebral height maintaining device with shock-absorbing implant-bone interface load effect |
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| CN112089510A (en) * | 2020-10-12 | 2020-12-18 | 四川大学华西医院 | Cervical vertebra intervertebral height maintaining device with shock-absorbing implant-bone interface load effect |
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