CN106236333B - Artificial vertebral body fixed by anterior pedicle screw and positioning and installing tool - Google Patents
Artificial vertebral body fixed by anterior pedicle screw and positioning and installing tool Download PDFInfo
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- CN106236333B CN106236333B CN201610869458.XA CN201610869458A CN106236333B CN 106236333 B CN106236333 B CN 106236333B CN 201610869458 A CN201610869458 A CN 201610869458A CN 106236333 B CN106236333 B CN 106236333B
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- 238000005516 engineering process Methods 0.000 claims abstract description 5
- 230000007547 defect Effects 0.000 claims description 8
- 239000007943 implant Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- 230000036285 pathological change Effects 0.000 claims description 4
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- 201000010099 disease Diseases 0.000 claims description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 claims description 3
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- 241000587161 Gomphocarpus Species 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
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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
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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
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
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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
- A61F2/3094—Designing or manufacturing processes
- A61F2/30942—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
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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
- A61F2/3094—Designing or manufacturing processes
- A61F2002/30985—Designing or manufacturing processes using three dimensional printing [3DP]
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- Orthopedic Medicine & Surgery (AREA)
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Abstract
An artificial vertebral body fixed by front pedicle screws and a positioning and installing tool are characterized in that the artificial vertebral body is provided with pedicle screw fixing holes, and the artificial vertebral body can be accurately fixed on the pedicles on two sides by guiding screws, so that strong self-stabilization is realized. The artificial vertebral body can also be fused with a steel plate according to requirements, the upper end and the lower end of the steel plate can exceed the length of the artificial vertebral body, and only the upper end of the steel plate can be longer than the artificial vertebral body. The steel plate extending end can also be provided with a screw hole coaxial with the vertebral pedicle and a screw hole pointing to the vertebral body. In order to ensure that the anterior pedicle screw is safely and accurately placed, a drilling positioning guide plate and a bone cutting guide plate are arranged at the same time. The artificial vertebral body and the mounting tools such as the drilling hole and the bone cutting guide plate are designed and printed by utilizing a 3D printing technology based on medical image data. Safely and quickly can realize the maximization of the fixing strength of the anterior spinal stability operation.
Description
Technical Field
The invention belongs to the field of medical instruments, and particularly relates to an artificial vertebral body fixed by anterior pedicle screws and a positioning and installing tool.
Background
Stable reconstruction surgery is needed after excision of cervical tumor, tuberculosis, trauma and other lesions, at present, autologous bone, allogeneic bone, artificial bone, titanium mesh or artificial vertebral body is usually adopted to support at the defect, and then a steel plate is fixed on the retained vertebral body by using a locking screw. However, since the vertebral bodies are all made of cancellous bone and have short anterior-posterior diameters, only screws of about 15mm can be used. Therefore, the fixation strength is weak, and the cervical brace is required to be used for fixation for several months. Especially, in the case that the vertebral body fixed by the screw has lesion or long reconstructed segment, the fixation effect is weaker, and the complications of spinal displacement, bone nonunion, loosening, dislocation, fracture and the like of the steel plate screw and the implant caused by fixation failure are generated. For example, cervical tuberculosis usually occurs at the edge of an intervertebral disc, an upper vertebral body and a lower vertebral body, the bone of the upper part of the upper vertebral body and the bone of the lower part of the lower vertebral body are relatively complete and can be fixed by screws, but the bone of the position on MRI is often infiltrated, the cancellous bone of the vertebral bodies becomes more brittle, stable fixation is difficult to obtain only by 2 vertebral body nails, and a cutting and total resection operation of a diseased vertebral body is required to enhance the fixing force, so that the intervertebral discs at the upper end and the lower end are necessarily removed together to provide a bone grafting bed, a support for implantation is fused on the bone grafting bed, a fixed segment is increased, the moving range of the cervical vertebra is reduced, and the adjacent segment is more easily degenerated. For another example, after a long-segment cervical tumor needs to completely remove all diseased vertebral bodies and upper and lower intervertebral discs thereof and is supported by a titanium mesh or an artificial vertebral body, two vertebral body nails can only be respectively arranged at two ends of the steel plate, and the removed vertebral bodies cannot be reinforced by screws, so that the span of the steel plate is too long, and the fixing strength is naturally weakened. The problems also exist after the titanium reduction net is fixed in the anterior approach of the long-section cervical vertebra trauma.
In order to solve the problem, the research of anterior cervical pedicle screw fixing technology has appeared in recent years, namely, the strongest vertebral pedicle of vertebra from the anterior direction of the vertebral body penetrates into the screw which exceeds the vertebral body nail by more than one time for fixing. Basic research shows that the fixing strength of the material is improved by times. However, the surface of the vertebral body lacks anatomical marks for positioning, so that important structures such as vertebral artery, spinal cord or nerve root and the like are easily injured by mistake in the nail placing process; in addition, the angle between the locking screw and the steel plate is large, and the tail end of the locking screw is often higher than the steel plate and is against the rear wall of the esophagus, so as to obstruct the peristalsis caused by the pharyngeal regurgitation of the esophagus, cause congestion and edema of the rear wall of the esophagus and further cause esophageal fistula. All the above complications can cause life risks or extremely serious consequences such as high paraplegia. In addition, because the intersection angle between the cervical vertebra arch root axis and the cervical vertebra sagittal line is too large, the tail ends of two pedicle screws of the same vertebral body can intersect. Therefore, at present, only a few experts report clinical cases of the anterior cervical vertebral arch nail at home and abroad, and the cervical vertebral arch nail is fixed by a single screw. Thoracolumbar lesions also present the problems described above.
Disclosure of Invention
In order to solve the problem of weak anterior spinal fixation strength, the invention designs an artificial vertebral body fixed by anterior pedicle screws and an operation tool for assisting positioning and installation.
In order to realize the purpose of the invention, the technical scheme adopted by the invention is as follows:
the method comprises the steps of establishing a mathematical model of a diseased spine by using medical image data and a 3D printing technology, planning a diseased region of excision on the model according to disease analysis, virtually excising diseased regions, and virtually adjusting and recovering the position of the spine to recover the height, curvature and the like of the spine to the optimal state which can be corrected in an operation. Then according to the condition of bone defect under the state, an artificial vertebral body for filling the defect and supporting the spine is designed, or a steel plate for fixing the spine is added. The invention can integrate the artificial vertebral body and the steel plate, wherein the steel plate is the front wall of the artificial vertebral body. Preferably, both ends of the steel plate are slightly longer than the artificial vertebral body, and only the upper end of the steel plate is longer than the artificial vertebral body. The two ends of the steel plate beyond the artificial vertebral body are respectively provided with a plurality of screw holes. Preferably, the screw holes may be coaxial with the pedicle, may be non-precisely oriented toward the vertebral body, or a combination thereof. Preferably, the artificial vertebral body part is also designed with fixing nail holes which are coaxial with the pedicles of all the excised vertebral bodies, and all the vertebral bodies can be designed with two pedicle nail fixing holes, namely all the vertebral bodies can be fixed by bilateral anterior pedicle nails. Therefore, the fixing strength thereof can be maximized.
In order to ensure that the diseased vertebral body is removed and the original body surface mark is lost, the pedicle screw can still be accurately implanted through the pedicle screw fixing hole after the artificial vertebral body is implanted into the bone defect, and the pedicle screw drilling guide plate and the bone cutting guide plate which are manufactured by utilizing the original bone surface are also included. Preferably, the drilling guide plate takes a bone surface with a compact and smooth surface during modeling in an operation area as a mask, and a protruded drilling guide pipe is manufactured on each pedicle major axis extension line on the outer surface; the bases of two pedicle guide tubes on the same vertebral body can be intersected, and the inner tube cavities of the two guide tubes can also be intersected. The mask of the osteotomy guide plate is also manufactured according to the requirements, and a hollowed osteotomy guide window is manufactured on the plane of planned osteotomy. The drilling guide plate can be used for drilling vertebral pedicle holes on two sides of the anterior path in advance to form a vertebral pedicle screw channel; the bone cutting guide plate can be used for removing lesion in a precise range according to a plan, after the artificial vertebral body is implanted, the drilled pedicle screw channel is explored through the printed pedicle screw fixing hole, whether the artificial vertebral body is accurately arranged can be verified, fine adjustment is carried out on the arrangement of the artificial vertebral body according to the formed pedicle screw channel, and accurate, safe and quick anterior pedicle screw fixation is achieved.
The artificial vertebral body and all guide plates designed by the invention are manufactured by adopting a metal or nonmetal 3D printer based on a 3D printing technology, and the manufacturing requirements of design can be met. Especially, the implant can be printed into a bionic bone trabecula structure with a plurality of porous edges, thereby effectively preventing the implant from sinking and being beneficial to the fusion of the implant and the host bone.
The installation of the invention can also be carried out with the aid of navigation and robots.
The invention has the advantages that the invention can precisely customize an individualized artificial vertebral body which can realize the maximization of a self-stabilization mechanism, can safely, quickly and precisely realize the maximization of the fixation strength of the reconstruction operation of the excision stability of the anterior spinal lesions, and simultaneously realize the friendly fusion and the long-term stability of the implant and the human tissues.
Drawings
FIG. 1 is a rear side schematic view of a captive screw of the present invention;
FIG. 2 is a front side schematic view of the present invention;
FIG. 3 is a schematic view of a locating drill guide plate of the present invention;
FIG. 4 is a schematic view of the osteotomy guide of the present invention;
in the figure:
1. a vertebral body; 2. a steel plate; 3. screw holes; 4. a pedicle screw fixation hole; 5. pedicle screws; 6. a vertebral body screw; 7. drilling a guide plate mask; 8. a guide tube; 9. a bone cutting guide plate mask.
Detailed Description
The invention is further explained below with reference to the figures and examples.
The artificial vertebral body can be a winged cylindrical body synthesized by the vertebral body 1 and the steel plate 2, and can also be a simple cylindrical body. The vertebral body 1 is in a hollow barrel shape and is used for filling autologous or allogeneic, allogeneic or artificial bones. The shape of the vertebral body 1 can be flexibly set according to the shape of the cut-off pathological vertebral body and the adjacent vertebral bodies. For example, the cross-section may be circular, elliptical, rectangular, trapezoidal, etc.
Preferably, the artificial vertebral body with the wing columnar body pattern is formed by tightly attaching the steel plate 2 to the front wall of the vertebral body 1 and integrating the steel plate with the front wall to thicken the front wall. The length of the steel plate 2 is larger than that of the vertebral body 1. Can be a double-wing column shape with both ends exceeding the edge of the vertebral body 1; or a single wing column with the upper end exceeding the vertebral body 1 and the lower end being flush with the vertebral body 1. The parts of the two ends of the steel plate 2 beyond the vertebral body 1 are respectively provided with a plurality of screw holes 3 for traversing screws to fix the steel plate 2 on the vertebral body or pedicle of vertebral arch of the vertebra supported by the vertebral body 1.
Preferably, the screw holes 3 at the two ends of the steel plate 2 can be divided into pedicle screw holes and vertebral body screw holes, the pedicle screw holes are coaxial with the corresponding pedicles, and pedicle screws 5 penetrate through the longitudinal axes of the pedicles through the holes and are fixed on the longitudinal axes; the axis of the vertebral body screw hole points to the back of the vertebral body, and the vertebral body screw 6 is screwed into the vertebral body through the hole.
Preferably, the lengths of the vertebral body 1 and the steel plate 2 are determined according to the disease conditions such as the quantity of the spine to be excised and reconstructed, whether the whole vertebral body is excised and the like, but the pedicle screw fixing holes 4 are arranged on the axial lines of vertebral arch roots of the artificial vertebral body corresponding to two sides of the spine from which the vertebral body is excised and penetrate through the front wall and the rear wall of the vertebral body 1; each fixation hole 4 is in the shape of a single-step stepped tube for receiving the head of a pedicle screw 5 and preventing the pedicle screw from sinking. In order to avoid collision of the pedicle screws 5 on both sides, the thicker hole at the tail end of the fixing hole 4 is deepened to enable the pedicle screws 5 to sink in the pressurized and thick front wall of the vertebral body 1.
The pedicle screw and the vertebral body screw are both composed of a screw body with threads and a nail head part which has larger diameter than the screw body so as to generate a pressurizing mechanism and prevent the screw from sinking, the nail head is short and small, and the shape of the nail head only allows the nail head to be flush with the steel plate 2 after being screwed into the screw hole or slightly higher than the surface of the steel plate 2 and needs to be smooth and slightly convex. The combination of the screw hole 3 and the screw can be a common screw structure capable of rotating and deflecting, and can also be a locking structure.
The invention also comprises a pedicle drilling guide plate and a bone cutting guide plate which are manufactured by utilizing the original bone surface. Preferably, the drilling guide plate takes a bone surface with a compact and smooth surface during modeling in an operation area as a drilling guide plate mask 7, the inner surface of the drilling guide plate mask 7 is matched with the outer surface of the bonded bony structure, and the drilling guide plate mask 7 is pressed and clamped on the bone surface and cannot generate micro motion in any direction. Manufacturing a drilling guide pipe 8 coupled with the drilling guide plate mask 7 on the outer surface of the drilling guide plate mask 7 along the extension line of each pedicle long axis, wherein the guide pipe 8 can restrict that a drill bit can only advance along the longitudinal axis of the drill bit, namely can only advance along the longitudinal axis of the pedicle, so as to accurately open a pedicle screw channel; the bases of two pedicle hole drilling guide tubes 8 on the same vertebral body can be intersected, the tube walls can be fused with each other, and the inner tube cavities can also be intersected.
The osteotomy guide mask 9 of the osteotomy guide is also manufactured according to the requirements, and a hollowed osteotomy guide window is manufactured on the plane of planned osteotomy, wherein the edge of the window is the osteotomy guide surface 10.
The drilling guide plate can be used for drilling vertebral pedicle holes on two sides of the anterior path in advance to form a vertebral pedicle screw channel; the bone cutting guide plate can be used for accurately removing the lesion according to a planned implementation range. After the artificial vertebral body is implanted into the defect after the pathological changes are removed, the drilled pedicle screw channel is explored through the printed pedicle screw fixing hole 5, whether the arrangement of the artificial vertebral body is accurate or not can be verified, and fine adjustment is carried out on the arrangement of the artificial vertebral body according to the formed pedicle screw channel, so that accurate, safe and quick anterior pedicle screw fixation is realized.
Claims (10)
1. An artificial vertebral body fixed by anterior pedicle screws and a positioning and installing tool are used for reconstructing defects of a cervical intervertebral disc, the lower part of an upper cervical vertebra and the upper part of a lower cervical vertebra of the cervical intervertebral disc, a mathematical model of a pathological change spine is established by utilizing medical image data and a 3D printing technology, a pathological change excision range is planned on the model according to disease analysis, pathological changes are virtually excised, meanwhile, the position of the spine is virtually adjusted and restored, the height and the curvature of the spine are restored to the optimal state which can be corrected in an operation, and then a personalized implant is designed according to the condition of bone defects under the state; the artificial vertebral body is a hollow columnar body, and the vertebral pedicle screw fixing holes which are manufactured according to image data collected by each specific patient and are manufactured by a 3D printing process, individualized and coaxial with the vertebral pedicle and penetrate through the front wall and the rear wall are arranged at the positions of the vertebral pedicles at two sides of each cervical vertebra to be replaced, so that the artificial vertebral body can be fixed on the vertebral pedicle of the cervical vertebra where the vertebral body to be cut is located by front-way vertebral pedicle screws; and the positioning drilling guide device assisting in the pedicle screw path opening and the bone cutting guide device assisting in accurately cutting the pathological vertebral body are individually designed according to the specific situation that the height and the curvature of the vertebral column are recovered to the bone defect formed in the optimal state which can be corrected in the operation by virtually adjusting and recovering the position of the vertebral column at the same time.
2. The artificial vertebral body and the positioning and installation tool fixed by the anterior pedicle screw as claimed in claim 1, wherein the cross section of the hollow cylindrical artificial vertebral body is circular, oval, rectangular or trapezoidal; each pedicle screw fixing hole is in a single-stage stepped tubular shape and is used for accommodating the head of a pedicle screw and preventing the pedicle screw from sinking; in order to avoid collision of the pedicle screws on two sides, the thicker pore canal at the tail end of the fixing hole is required to be deepened to enable the pedicle screws to sink in the front wall of the vertebral body; the artificial vertebral body can be fixed on the vertebral pedicle by screwing the vertebral pedicle screw into the vertebral pedicle screw fixing hole.
3. The artificial vertebral body and the positioning and installation tool for anterior pedicle screw fixation according to claim 1, wherein the artificial vertebral body is a winged cylinder body composed of a vertebral body and a steel plate, the steel plate is tightly attached to the anterior wall of the vertebral body and is integrated with the anterior wall of the vertebral body to thicken the anterior wall.
4. The artificial vertebral body and positioning and installing tool for anterior pedicle screw fixation according to claim 3, wherein the length of the steel plate is greater than that of the vertebral body, and the shape of the steel plate is a double-wing column with both ends exceeding the edge of the vertebral body or a single-wing column with the upper end exceeding the vertebral body and the lower end being flush with the vertebral body.
5. The artificial vertebral body and the positioning and installation tool for anterior pedicle screw fixation according to claim 3, wherein the portions of the two ends of the steel plate beyond the vertebral body are respectively provided with a plurality of screw holes for crossing screws to fix the steel plate on the cervical vertebral body supported by the vertebral body.
6. The artificial vertebral body and positioning and installing tool for anterior pedicle screw fixation according to claim 1, wherein the pedicle screw and vertebral body screw are composed of a screw body with threads and a head portion with a larger diameter than the screw body to generate a pressurizing mechanism and prevent the screw from sinking, the head is short and small, and the shape of the head is only allowed to be flush with the steel plate after being screwed into the screw hole or slightly higher than the surface of the steel plate and needs to be smooth and slightly convex; the combination of the screw hole and the screw is a common screw structure capable of rotating and deflecting.
7. The artificial vertebral body and positioning and installing tool for anterior pedicle screw fixation according to claim 1, wherein the pedicle screw and vertebral body screw are composed of a screw body with threads and a head portion with a larger diameter than the screw body to generate a pressurizing mechanism and prevent the screw from sinking, the head is short and small, and the shape of the head is only allowed to be flush with the steel plate after being screwed into the screw hole or slightly higher than the surface of the steel plate and needs to be smooth and slightly convex; the combination of the screw hole and the screw is a locking structure.
8. The artificial vertebral body and positioning and installing tool fixed by the anterior pedicle screw as claimed in claim 1, wherein the drilling guide device takes a bone surface with a compact and smooth surface during modeling in an operation area as a drilling guide plate mask, the inner surface of the mask is inosculated with the outer surface of a bonded bony structure, and the mask can not generate any micro-motion in any direction after being pressed and clamped on the bone surface; a drill guide tube coupled to the mask is formed on the outer surface of the mask along the long axis of each pedicle, and the guide tube can restrict the drill bit from advancing only along the longitudinal axis of the drill bit.
9. The artificial vertebral body and positioning and installing tool fixed by the anterior pedicle screw as claimed in claim 1, wherein the osteotomy guiding device takes a bone surface with a compact and smooth surface during modeling in an operation area as an osteotomy guide plate mask, the inner surface of the mask is inosculated with the outer surface of a bonded bony structure, and the mask can not generate micro-motion in any direction after being pressed and clamped on the bone surface; a hollow osteotomy guiding window is manufactured on a plane planned for osteotomy, and the edge of the window is an osteotomy guiding surface.
10. The anterior pedicle screw fixation artificial vertebral body and positioning and installation tool as claimed in claim 1, wherein the artificial vertebral body is a bionic bone trabecular structure.
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| CN201610869458.XA CN106236333B (en) | 2016-10-01 | 2016-10-01 | Artificial vertebral body fixed by anterior pedicle screw and positioning and installing tool |
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| CN106236333B true CN106236333B (en) | 2020-01-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107095730A (en) * | 2017-04-25 | 2017-08-29 | 中国人民解放军第二军医大学第二附属医院 | A kind of assembly type artificial vertebral body |
| CN106943215A (en) * | 2017-04-25 | 2017-07-14 | 中国人民解放军第二军医大学第二附属医院 | A kind of adjustable assembly type artificial vertebral body |
| CN106923941A (en) * | 2017-04-26 | 2017-07-07 | 中国人民解放军第二军医大学第二附属医院 | A kind of personalized plate body integration artificial vertebral body based on 3D printing |
| CN108324409B (en) * | 2018-01-08 | 2023-07-28 | 北京爱康宜诚医疗器材有限公司 | Bone connecting device |
| CN108542556B (en) * | 2018-04-28 | 2024-05-28 | 北京爱康宜诚医疗器材有限公司 | Lumbosacral artificial prosthesis |
| CN109009581B (en) * | 2018-09-13 | 2024-02-02 | 陕西东望科技有限公司 | Assembled artificial vertebral body |
| CN109646153A (en) * | 2019-02-28 | 2019-04-19 | 赵刘军 | Novel interbody cage systems based on lower cervical anterior pedicle of vertebral arch basal part screw |
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Effective date of registration: 20231207 Address after: 330000 No. 92 Patriotic Road, Nanchang, Jiangxi Patentee after: JIANGXI PROVINCIAL PEOPLE'S Hospital Address before: 330006 room 1701, Jiangyi community, No.169, 320 Branch Road, Sanjing Road, Nanchang City, Jiangxi Province Patentee before: Dong Xieping |