CN110897695B - A titanium cage for lower cervical anatomical spine - Google Patents
A titanium cage for lower cervical anatomical spine Download PDFInfo
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- CN110897695B CN110897695B CN201911151295.1A CN201911151295A CN110897695B CN 110897695 B CN110897695 B CN 110897695B CN 201911151295 A CN201911151295 A CN 201911151295A CN 110897695 B CN110897695 B CN 110897695B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant
- A61B17/7062—Devices acting on, attached to, or simulating the effect of, vertebral processes, vertebral facets or ribs ; Tools for such devices
- A61B17/7064—Devices acting on, attached to, or simulating the effect of, vertebral facets; Tools therefor
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant
- A61B17/7094—Solid vertebral fillers; devices for inserting such fillers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B2017/564—Methods for bone or joint treatment
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Abstract
本发明属于医用假体制造技术领域，涉及一种下颈椎解剖型钛笼，包括：钛笼本体，钛笼本体的上端为穹隆结构，下端为斜型结构，穹隆结构与斜型结构之间设有网状结构，网状结构分别与穹隆结构、斜型结构相连接；网状结构包括相连接的第一前表面、第一后表面、第一左侧面及第一右侧面，第一前表面、第一后表面均呈弧形结构，第一左侧面、第一右侧面均呈平面结构。根据颈椎解剖数据测量结果对下颈椎解剖型钛笼的上端采用穹隆结构的设计，并且在对下颈椎解剖型钛笼的下端采用斜型结构的设计，模拟颈椎手术节段角度，从而扩大了钛笼与颈椎终板之间的接触面积，降低应力集中现象，使得应力均匀地分布在终板表面，进而降低钛笼塌陷的发生率。
The present invention belongs to the technical field of medical prosthesis manufacturing, and relates to a lower cervical anatomical titanium cage, comprising: a titanium cage body, the upper end of the titanium cage body is a dome structure, the lower end is an oblique structure, a mesh structure is arranged between the dome structure and the oblique structure, and the mesh structure is respectively connected to the dome structure and the oblique structure; the mesh structure comprises a first front surface, a first rear surface, a first left side surface and a first right side surface connected to each other, the first front surface and the first rear surface are both arc-shaped structures, and the first left side surface and the first right side surface are both plane structures. According to the measurement results of cervical anatomical data, the upper end of the lower cervical anatomical titanium cage is designed with a dome structure, and the lower end of the lower cervical anatomical titanium cage is designed with an oblique structure, simulating the angle of the cervical surgical segment, thereby expanding the contact area between the titanium cage and the cervical end plate, reducing the stress concentration phenomenon, and making the stress evenly distributed on the end plate surface, thereby reducing the incidence of titanium cage collapse.
Description
Technical Field
The invention belongs to the technical field of medical prosthesis manufacturing, and relates to a lower cervical vertebra anatomical titanium cage.
Background
At present, the cervical vertebra sub-total excision decompression combined titanium cage bone grafting fusion is a common operation mode for treating cervical spondylosis, cervical vertebra spinal stenosis, cervical vertebra vertebral fracture with spinal cord compression or old fracture dislocation combined incomplete spinal cord injury and the like. The operation mode adopts a way that the corresponding vertebral bodies and intervertebral discs are exposed through the anterior approach, vertebral body nails are respectively arranged on the upper and lower 2 adjacent vertebral bodies of the vertebral body to be resected, and a vertebral body spreader is arranged to spread the upper and lower vertebral bodies by a certain height. And (3) cutting off pathological change intervertebral discs at two ends, performing vertebral body secondary total cutting off most vertebral bodies and posterior longitudinal ligaments of the vertebrae at the inner side of the bilateral uncinate joint, implanting titanium cages (filled bone grafting particles) with proper length into the decompression groove, and selecting proper anterior cervical steel plates to be fixed on the upper vertebral body and the lower vertebral body. A large number of clinical studies have demonstrated that it has a good surgical efficacy. The operation section can obtain the immediate stability after operation and provide a stable biomechanical environment for the recovery of the nerve function.
However, related post-operation follow-up studies find that partial patients have titanium cage sinking and collapsing conditions, and the post-operation curative effect of the patients is affected. Yu Chen et al performed post-operative follow-up for 300 patients who performed cervical vertebral sub-total resection decompression in combination with titanium cage bone fusion. Follow-up results revealed that 182 (60.7%) patients had mild titanium cage collapse (1-3 mm) and 57 patients had severe titanium cage collapse (> 3 mm). Compared with a patient without titanium cage collapse after operation, the nerve function recovery condition of the patient with titanium cage collapse is obviously lower than that of the patient without titanium cage collapse. In addition, serious titanium cage collapse can cause cervical pain, nerve function damage, fixation failure and other complications to occur .(Chen Y,Chen DY,Guo YF,et al.Subsidence of Titanium Mesh Cage A Study Based on 300 Cases[J].Journal of Spinal Disorders & Techniques,2008,21(7):489-492.), and one important reason for the titanium cage post-operation collapse is that the contact area of the titanium cage and the vertebral endplate is small. In the conventional titanium cage implantation process, the length of the titanium cage needs to be trimmed to the length of the bone groove. One surface of the titanium cage which is not cut is of a smooth structure, and has 6 flat contact points, and the cut end is 12 sharp contact points in most cases. The point contact mode causes larger pressure load on the surface of the vertebral endplate, and is easy to cause the damage of the vertebral endplate structure, so that the titanium cage is penetrated into the vertebral body, and the titanium cage is caused to collapse. (Xu Jianwei, gu Lianshun, chen Deyu, et al, discussion of early collapse of titanium mesh bone graft for partial total resections of anterior cervical vertebral bodies [ J ]. J.Chinese J.orthopedic, 2002, 10 (z 1): 1267-1269.)
In order to prevent collapse of a titanium cage after cervical vertebra sub-total excision decompression combined titanium cage bone grafting fusion operation and avoid complications such as neck pain, nerve function damage, fixation failure and the like caused by the collapse of the titanium cage, anatomical parameters such as anterior and posterior diameter, left and right diameter, sagittal plane radian radius, coronal plane radian radius, cervical vertebra operation section height, operation section angle and the like of upper and lower end plates of the cervical vertebra are measured, and a lower cervical vertebra anatomical titanium cage is designed according to the parameters.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides the lower cervical anatomic titanium cage, which reduces the pressure on the surface of the vertebral endplate and the damage to the vertebral endplate caused by overlarge pressure by increasing the contact area of the titanium cage and the vertebral endplate, so that the problem of collapse of the titanium cage after the traditional titanium cage is implanted is solved.
In order to achieve the above purpose, the present invention provides the following technical solutions:
A lower cervical anatomic titanium cage comprising: the upper end of the titanium cage body is a dome structure, the lower end of the titanium cage body is an inclined structure, a net structure is arranged between the dome structure and the inclined structure, and the net structure is respectively connected with the dome structure and the inclined structure; the net structure comprises a first front surface, a first left side surface, a first rear surface and a first right side surface which are sequentially connected, wherein the first front surface and the first rear surface are of arc-shaped structures, and the first left side surface and the first right side surface are of plane structures.
Further, the titanium cage is of a square structure, and the titanium cage is designed to be square, so that the strength advantages of the rear part and the rear outer part of the end plate can be fully utilized, the operation section can obtain better mechanical properties, and the titanium cage is prevented from collapsing; under the same diameter, the square design has larger bone grafting volume compared with the traditional circular design, can contain more cancellous bone particles, and is beneficial to bone grafting fusion of the operation section; the square design makes the two sides of the titanium cage be planes, increases the contact area with the residual vertebral body, and is favorable for osseous fusion with the residual vertebral body.
Further, the first left side surface and the first right side surface are parallel to each other.
Further, the dome structure comprises four arc structures of front, back, left and right which are connected; the vertex of the left arc-shaped structure and the vertex of the right arc-shaped structure are respectively positioned at the rear 1/3 position of the corresponding arc-shaped structure and gradually decrease towards two sides, and the vertex of the front arc-shaped structure and the vertex of the rear arc-shaped structure are respectively positioned at the middle position of the corresponding arc-shaped structure and gradually decrease towards two sides.
Further, the reticular structure is circumferentially distributed with a plurality of diamond-shaped structure layers, adjacent diamond-shaped structure layers are staggered, and each diamond-shaped structure layer comprises a plurality of diamond-shaped meshes.
Further, the number of the diamond-shaped structure layers is six, and the number of each layer of diamond-shaped meshes is nine.
Furthermore, the height of the reticular structure is 19mm, the width is 2mm, the thickness is 2mm, and the design of the reticular structure mainly aims to increase the contact area between bone grafting particles in the titanium cage and surrounding bones, thereby being beneficial to early fusion of bones in an operation area.
Further, the inclined structure comprises a second front surface, a second left side surface, a second rear surface and a second right side surface which are sequentially connected, wherein the second front surface and the second rear surface are arc-shaped structures, and the second left side surface and the second right side surface are inclined structures.
Further, the vertex of the second front surface and the vertex of the second rear surface are respectively positioned at the middle positions of the second front surface and the second rear surface, smoothly decrease from the vertex to two sides, and are upwards connected with the net structure.
Further, the vertex of the second left side surface and the vertex of the second right side surface are respectively positioned at the rear end of the corresponding inclined structure, and the heights of the second left side surface and the second right side surface are respectively increased from the front end to the rear end of the corresponding inclined structure and are upwards connected with the net structure.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects: the upper end of the lower cervical vertebra anatomical titanium cage is designed to be of a dome structure according to cervical vertebra anatomical data measurement results, and the lower end of the lower cervical vertebra anatomical titanium cage is designed to be of an inclined structure, so that the angle of a cervical vertebra operation section is simulated, the contact area between the titanium cage and a cervical vertebra endplate is enlarged, the stress concentration phenomenon is reduced, the stress is uniformly distributed on the surface of the endplate, and the incidence rate of collapse of the titanium cage is reduced.
In addition, by designing the lower cervical anatomic titanium cage as square, there are great advantages in surgical segment fusion and support strength: the titanium cage is designed into a square shape, so that the strength advantages of the rear and the outer sides of the end plate can be fully utilized, the operation section can obtain better mechanical properties, and the titanium cage is prevented from collapsing; under the same diameter, the square design has larger bone grafting volume compared with the traditional circular design, can contain more cancellous bone particles, and is beneficial to bone grafting fusion of the operation section; the square design makes the two sides of the titanium cage be planes, increases the contact area with the residual vertebral body, and is favorable for osseous fusion with the residual vertebral body.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate principles of the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a side view of an anatomic titanium cage for the lower cervical spine provided by the present invention;
FIG. 2 is a front view of a lower cervical anatomic titanium cage provided by the present invention;
FIG. 3 is a top view of the lower cervical anatomic titanium cage provided by the present invention;
FIG. 4 is a bottom view of the lower cervical anatomic titanium cage provided by the present invention;
FIG. 5 is a rear view of the lower cervical anatomic titanium cage provided by the present invention;
fig. 6 is an isometric view of an anatomic titanium cage for the lower cervical spine provided by the invention.
Wherein: 1 is a dome structure; 2 is an inclined structure; 3 is a net structure; 4 is a first front surface; 5 is a first rear surface; 6 is a first left side surface; 7 is a first right side; 8 are diamond meshes.
Detailed Description
The present invention will be described in further detail below with reference to the drawings and examples for better understanding of the technical solutions of the present invention to those skilled in the art.
Example 1:
Referring to fig. 1-6, the present invention provides an anatomic titanium cage for the lower cervical spine, the anatomic titanium cage comprising: the titanium cage comprises a titanium cage body, wherein the upper end of the titanium cage body is provided with a dome structure 1, the lower end of the titanium cage body is provided with an inclined structure 2, a net structure 3 is arranged between the dome structure 1 and the inclined structure 2, and the net structure 3 is respectively connected with the dome structure 1 and the inclined structure 2; the net structure 3 comprises a first front surface 4, a first left side surface 6, a first rear surface 5 and a first right side surface 7 which are sequentially connected, wherein the first front surface 4 and the first rear surface 5 are arc-shaped structures, and the first left side surface 6 and the first right side surface 7 are plane structures.
Further, the titanium cage is of a square structure as a whole, and has great advantages in the aspects of fusion and supporting strength of surgical sections: the titanium cage is designed into a square shape, so that the strength advantages of the rear and the outer sides of the end plate can be fully utilized, the operation section can obtain better mechanical properties, and the titanium cage is prevented from collapsing; under the same diameter, the square design has larger bone grafting volume compared with the traditional circular design, can contain more cancellous bone particles, and is beneficial to bone grafting fusion of the operation section; the square design makes the two sides of the titanium cage be planes, increases the contact area with the residual vertebral body, and is favorable for osseous fusion with the residual vertebral body.
Further, the first left side surface 6 and the first right side surface 7 are parallel to each other. Preferably, the height of the first left side surface 6 and the first right side surface 7 on the middle line of the 1/3 part behind the whole titanium cage body is 19mm, the height gradually decreases to two sides, and the thickness is 2mm from inside to outside. The design of the planar structure increases the contact area between the titanium cage body and the residual vertebral body, and is beneficial to the osseous fusion between the titanium cage and the residual vertebral body.
Further, the dome structure 1 includes four arc structures of front, rear, left and right connected; the vertex A of the left arc-shaped structure and the vertex B of the right arc-shaped structure are respectively positioned at the rear 1/3 position of the corresponding arc-shaped structure and gradually decrease towards two sides, and the vertex C of the front arc-shaped structure and the vertex D of the rear arc-shaped structure are respectively positioned at the middle position of the corresponding arc-shaped structure and gradually decrease towards two sides. The dome 1 is connected downwards to the mesh 3. Preferably, the anterior-posterior diameter, the left-right diameter of the dome 1 is 12mm, and the thickness from inside to outside is 2mm.
Further, the reticular structure 3 is circumferentially distributed with a plurality of diamond-shaped structure layers, adjacent diamond-shaped structure layers are staggered, and each diamond-shaped structure layer comprises a plurality of diamond-shaped meshes 8.
Further, the number of the diamond-shaped structural layers is six, and the number of each diamond-shaped mesh 8 is nine.
Further, the height of the reticular structure 3 is 19mm, the width is 2mm, the thickness is 2mm, and the design of the reticular structure mainly aims to increase the contact area between bone grafting particles in the titanium cage and surrounding bones, thereby being beneficial to early fusion of bones in an operation area.
Preferably, the height of the reticular structure 3 on the median line of the titanium cage body is 19mm, the reticular structure gradually decreases towards two sides, and the thickness from inside to outside is 2mm, so that the contact area between the titanium cage body and the lower surface of the cervical vertebral body is increased, the pressure born by the lower surface of the cervical vertebral body is reduced, and the collapse condition is effectively prevented.
Further, the inclined structure 2 comprises a second front surface, a second left side surface, a second rear surface and a second right side surface which are sequentially connected, wherein the second front surface and the second rear surface are arc-shaped structures, and the second left side surface and the second right side surface are inclined structures.
Further, the vertex of the second front surface and the vertex of the second rear surface are respectively positioned at the middle positions of the second front surface and the second rear surface, smoothly decrease from the vertex to two sides, and are upwards connected with the net structure 3.
Further, the vertex of the second left side surface and the vertex of the second right side surface are respectively located at the rear end of the corresponding inclined structure, and the heights of the second left side surface and the second right side surface are respectively increased from the front end to the rear end of the corresponding inclined structure, and are upwards connected with the mesh structure 3.
Preferably, the front-back diameter and the left-right diameter of the inclined structure 2 are 12mm, and the thickness from inside to outside is 2mm.
In conclusion, the total height of the lower cervical anatomic titanium cage is 25mm, and the front-back diameter and the left-right diameter are 12mm. The highest point is positioned at the rear 1/3 position and gradually decreases towards two sides; the lower surface of which gradually rises from front to back. The lower cervical anatomic titanium cage is suitable for treating diseases by combining cervical vertebral body sub-total excision and decompression with titanium cage bone grafting fusion, for example: nerve root or spinal canal stenosis, adjacent two-segment cervical disc herniation, kyphosis deformity, vertebral body tumor, vertebral body tuberculosis, cervical vertebral body burst fracture with non-nerve function damage, compression fracture, etc. The following description is of specific embodiments of disc removal, sub-total vertebral body incision, and present titanium cage implantation:
The patient with the operative indication is subjected to routine preoperative examination and the trachea and esophagus and the bed are pushed in parallel for urination and defecation exercise. The patient is in a supine position in operation, after the tracheal intubation of the patient is anesthetized, the two shoulder pads are soft pillows, the head and neck naturally extend backwards, the back pillow is soft head rings, and after the towel is laid in a disinfection mode, transverse incisions are made on the right side of the front middle line of the neck, and the length of the incisions is generally 3-5 cm. Soft tissues are passively separated layer by layer downwards, the trachea, the esophagus and the right side are pulled and protected by using a cervical vertebra drag hook, and the carotid sheath is pulled and protected slightly to two sides. After reaching the vertebral body and the anterior portion of the intervertebral disc, the C-arm is used to determine the cervical vertebral segment to be subjected to the secondary total incision of the vertebral body. The distractor screws are respectively screwed in the centers of the upper and lower vertebral bodies of the vertebral body to be subjected to secondary full cutting, the vertebral body distractor is sleeved on the distractor screws, and the distractor is distracted towards the upper and lower ends, and the distracting distance is generally 4mm. The upper and lower intervertebral discs of the corresponding vertebral bodies are determined, the annulus is incised by a sharp knife, and the nucleus pulposus forceps are used for taking out the broken intervertebral disc tissues. The vertebral body to be cut is grooved and decompressed longitudinally, the grooved width is 1-2 mm outside the inner side margin of the long cervical muscle at two sides, and the adjacent intervertebral discs are up to the surface of the posterior longitudinal ligament. If posterior longitudinal ligament ossification exists, the posterior longitudinal ligament is hooked and opened on the posterior longitudinal ligament, the anterior longitudinal ligament is bitten by using a long beak-shaped impact rongeur after being blunt-separated from the dura mater, and the longitudinal bone groove is enlarged and resected, bone at the peripheral bottom edge is decompressed in a submerged way, including the rear lower edge of the upper vertebral body, the rear upper edge of the lower vertebral body and bone fragments of vertebral bodies at two sides of the bone groove are resected, and the bone fragments are scraped to the adjacent vertebral body endplate cartilage surface to form punctiform bleeding. And selecting the lower cervical anatomic titanium cage with a proper length after measuring the length of the bone groove. The titanium cage inner cavity is filled with crushed bone blocks obtained by decompression and is tightly embedded, then the titanium mesh is implanted into the decompression groove, and redundant crushed bones are added around the titanium mesh. Removing a vertebral body spreader in front of the vertebral body, spreading and setting, selecting a cervical anterior approach steel plate with proper size, placing and locking by steps by adopting a special instrument, and closing the incision layer by layer after placing the drainage tube. And (5) performing postoperative routine nursing, and pulling out the drainage tube after 1 day. The neck brace is strictly worn for 3 months after operation, and is removed after 3 months.
Because the height and the size of the lower cervical vertebrae are different among people, 10 different models are designed to meet the requirements of different lower cervical vertebrae. The novel multifunctional electric bicycle comprises ten types of No. 1, no. 2, no. 3, no. 4, no. 5, no. 6, no. 7, no. 8, no. 9 and No. 10. Standard model number 3 (total height of titanium cage 25mm, front-rear diameter, left-right diameter 12 mm) has been described in detail in the above examples. The No. 1 is to reduce the height by 4mm on the basis of the standard model of the lower cervical vertebra anatomical titanium jack in the basket; no. 2 is to reduce the height by 2mm on the basis of the model number of the lower cervical vertebra anatomical titanium jack in the basket; the No. 4 is to increase the height by 4mm based on the standard model of the lower cervical vertebra anatomical titanium jack in the basket; the No. 5 is to increase the height by 2mm on the basis of the standard model of the lower cervical vertebra anatomical titanium jack in the basket; the diameter of the lower cervical vertebra anatomical titanium jack in the basket is increased by 2mm on the basis of the standard model of the lower cervical vertebra anatomical titanium jack in the basket, and the height is reduced by 4mm; the diameter of the front and back and the diameter of the left and right are increased by 2mm on the basis of the standard model of the lower cervical vertebra anatomical titanium jack in the basket, and the height is reduced by 2mm; the diameter of the anterior and posterior and the diameter of the left and right are increased by 2mm on the basis of the standard model of the lower cervical vertebra anatomical titanium jack in the basket; the diameter of the front and back and the diameter of the left and right are increased by 2mm on the basis of the standard model of the lower cervical vertebra anatomical titanium jack in the basket, and the height is increased by 2mm; the diameter of the lower cervical vertebra anatomical titanium jack in the basket is increased by 2mm on the basis of the standard model of the lower cervical vertebra anatomical titanium 10, and the height is increased by 4mm.
The lower cervical vertebra anatomical titanium cage adopts a dome structure design at the upper end of the lower cervical vertebra anatomical titanium cage according to cervical vertebra anatomical data measurement results, and adopts an inclined structure design at the lower end of the lower cervical vertebra anatomical titanium cage, so that the angle of a cervical vertebra operation section is simulated, the contact area between the titanium cage and a cervical vertebra endplate is enlarged, the stress concentration phenomenon is reduced, the stress is uniformly distributed on the surface of the endplate, and the incidence rate of collapse of the titanium cage is reduced.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
It will be understood that the invention is not limited to what has been described above and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (7)
1. A lower cervical anatomic titanium cage comprising: the titanium cage comprises a titanium cage body, wherein the upper end of the titanium cage body is a dome structure (1), the lower end of the titanium cage body is an inclined structure (2), a net structure (3) is arranged between the dome structure (1) and the inclined structure (2), and the net structure (3) is respectively connected with the dome structure (1) and the inclined structure (2); the net structure (3) comprises a first front surface (4), a first left side surface (6), a first rear surface (5) and a first right side surface (7) which are sequentially connected, wherein the first front surface (4) and the first rear surface (5) are of arc-shaped structures, and the first left side surface (6) and the first right side surface (7) are of plane structures;
The dome structure (1) comprises four arc structures which are connected in front, back, left and right; the vertexes of the left arc-shaped structure and the right arc-shaped structure are respectively positioned at the rear 1/3 position of the corresponding arc-shaped structure and gradually decrease towards two sides, and the vertexes of the front arc-shaped structure and the rear arc-shaped structure are respectively positioned at the middle position of the corresponding arc-shaped structure and gradually decrease towards two sides;
the reticular structure (3) is circumferentially distributed with a plurality of diamond-shaped structure layers, adjacent diamond-shaped structure layers are staggered, and each diamond-shaped structure layer comprises a plurality of diamond-shaped meshes (8);
The inclined structure (2) comprises a second front surface, a second left side surface, a second rear surface and a second right side surface which are sequentially connected, wherein the second front surface and the second rear surface are of arc-shaped structures, and the second left side surface and the second right side surface are of inclined structures;
The titanium cage body comprises 10 different models, including ten models of No. 1, no. 2, no. 3, no. 4, no. 5, no. 6, no. 7, no. 8, no. 9 and No. 10;
the total height of the titanium cage is 25mm, and the front-back diameter and the left-right diameter are 12mm;
The No. 1 is to reduce the height by 4mm on the basis of the standard model of the lower cervical vertebra anatomical titanium jack in the basket; no. 2 is to reduce the height by 2mm on the basis of the model number of the lower cervical vertebra anatomical titanium jack in the basket; the No. 4 is to increase the height by 4mm based on the standard model of the lower cervical vertebra anatomical titanium jack in the basket; the No. 5 is to increase the height by 2mm on the basis of the standard model of the lower cervical vertebra anatomical titanium jack in the basket; the diameter of the lower cervical vertebra anatomical titanium jack in the basket is increased by 2mm on the basis of the standard model of the lower cervical vertebra anatomical titanium jack in the basket, and the height is reduced by 4mm; the diameter of the front and back and the diameter of the left and right are increased by 2mm on the basis of the standard model of the lower cervical vertebra anatomical titanium jack in the basket, and the height is reduced by 2mm; the diameter of the anterior and posterior and the diameter of the left and right are increased by 2mm on the basis of the standard model of the lower cervical vertebra anatomical titanium jack in the basket; the diameter of the front and back and the diameter of the left and right are increased by 2mm on the basis of the standard model of the lower cervical vertebra anatomical titanium jack in the basket, and the height is increased by 2mm; the diameter of the lower cervical vertebra anatomical titanium jack in the basket is increased by 2mm on the basis of the standard model of the lower cervical vertebra anatomical titanium 10, and the height is increased by 4mm.
2. The titanium cage of claim 1, wherein said titanium cage is generally square in shape.
3. The titanium cage according to claim 1 or 2, characterized in that the first left side (6) and the first right side (7) are parallel to each other.
4. The lower cervical anatomic titanium cage according to claim 1, characterized in that the number of layers of the diamond-shaped structure is six and the number of diamond-shaped meshes (8) per layer is nine.
5. The titanium cage according to claim 1, characterized in that said mesh structure (3) has a height of 19mm, a width of 2mm and a thickness of 2mm.
6. The titanium cage according to claim 1, wherein the vertexes of the second front surface and the vertexes of the second rear surface are distributed at the middle positions of the second front surface and the second rear surface, and smoothly decrease from the vertexes to both sides.
7. The titanium cage of claim 6, wherein the peaks of the second left side and the second right side are respectively located at the rear ends of the corresponding diagonal structures, and the heights of the second left side and the second right side are respectively increased from the front ends to the rear ends of the corresponding diagonal structures.
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| CN201040010Y (en) * | 2007-06-06 | 2008-03-26 | 中国人民解放军第二军医大学 | A Full Contact Spinal Titanium Mesh Bone Graft Fusion Device |
| CN105030387A (en) * | 2015-08-14 | 2015-11-11 | 西安交通大学第二附属医院 | 3D-printed titanium cage for lower cervical vertebra |
| CN211460470U (en) * | 2019-11-21 | 2020-09-11 | 西安交通大学第二附属医院 | Anatomical titanium cage for lower cervical vertebra |
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| CN203591315U (en) * | 2013-09-30 | 2014-05-14 | 上海市第一人民医院 | Low-profile locking type cervical vertebra titanium mesh device |
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| CN204931903U (en) * | 2015-08-14 | 2016-01-06 | 西安交通大学第二附属医院 | A kind of Cervical vertebra 3D prints titanium cage |
| CN109481101B (en) * | 2018-12-28 | 2024-06-21 | 西安交通大学医学院第二附属医院 | Anterior cervical self-fixing artificial vertebral body |
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| CN201040010Y (en) * | 2007-06-06 | 2008-03-26 | 中国人民解放军第二军医大学 | A Full Contact Spinal Titanium Mesh Bone Graft Fusion Device |
| CN105030387A (en) * | 2015-08-14 | 2015-11-11 | 西安交通大学第二附属医院 | 3D-printed titanium cage for lower cervical vertebra |
| CN211460470U (en) * | 2019-11-21 | 2020-09-11 | 西安交通大学第二附属医院 | Anatomical titanium cage for lower cervical vertebra |
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