CN115414106A - Combined integrated anti-sedimentation anterior cervical fusion system - Google Patents
Combined integrated anti-sedimentation anterior cervical fusion system Download PDFInfo
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- CN115414106A CN115414106A CN202211148858.3A CN202211148858A CN115414106A CN 115414106 A CN115414106 A CN 115414106A CN 202211148858 A CN202211148858 A CN 202211148858A CN 115414106 A CN115414106 A CN 115414106A
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- fixing plate
- inner fixing
- fusion cage
- interbody fusion
- anterior cervical
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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
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
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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
- A61B17/7058—Plates mounted on top of bone anchor heads or shoulders
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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
- A61B17/7061—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant for stabilising vertebrae or discs by improving the condition of their tissues, e.g. using implanted medication or fluid exchange
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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
-
- 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
-
- 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
- A61B2017/7073—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant with intervertebral connecting element crossing an imaginary spinal median surface
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Neurology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Heart & Thoracic Surgery (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Molecular Biology (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Vascular Medicine (AREA)
- Prostheses (AREA)
Abstract
The invention discloses a combined integrated anti-sedimentation anterior cervical fusion system, and relates to the technical field of medical instruments. The method comprises the following steps: the inner fixing plate is provided with through holes at four angular positions, and the central position of the inner fixing plate is provided with a mounting hole; the interbody fusion cage is connected with the inner fixing plate, the interbody fusion cage is connected in the middle of the inner fixing plate, and a threaded hole is formed in the interbody fusion cage; the conical screw penetrates through the mounting hole in the inner fixing plate and is in threaded connection with the interbody fusion cage; the bone nail is arranged at the through hole and used for fixing the inner fixing plate. According to the invention, the interbody fusion cage is in threaded connection with the inner fixing plate, so that the technical effects of facilitating operation in an operation, reducing operation time and facilitating installation can be realized, internal fixation failure caused by asynchronous stress shielding and secondary sinking caused by different elastic modulus after the operation is reduced, and the formation of artifacts after the operation is reduced.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a combined integrated anti-sedimentation anterior cervical fusion system.
Background
Cervical spondylosis is commonly seen in middle-aged and old-aged patients, spinal Cervical Spondylosis (CSM) is caused by spinal cord compression and/or spinal cord blood supply obstacle of a segment due to degeneration of cervical intervertebral discs into pathological basis, the trailing edge of an adjacent vertebral body forms, the effect of conservative treatment is not good usually, diseases are aggravated gradually, and due to the fact that quite a plurality of CSM pressure-causing objects mainly come from the front of the spinal cord, such as osteophytes at the trailing edge of the vertebral body, intervertebral disc tissues and the like, an anterior approach operation mode can directly relieve compression, thoroughly reduce pressure and effectively recover and maintain physiological curvature of the cervical vertebra, and anterior cervical decompression bone grafting fusion surgery is more and more applied to clinic. And the reconstruction after the sufficient decompression is a very important link for ensuring the operation effect. The anterior cervical steel plate has good immediate stability and tension load effect, the function is to play the effect of tension band when the cervical vertebra extends, play the effect of supporting the steel plate when the cervical vertebra buckles, make cervical vertebra physiological flexion and height can be maintained, and cooperate interbody fusion cage to use, intervertebral height's maintenance has both enlarged intervertebral foramen, the tension of surrounding soft tissue has been resumeed again, make pathological change segment back longitudinal ligament to the centrum adduction under the longitudinal force effect of internal fixation support, the fold of ligament when having alleviateed the neck activity, further reach the decompression purpose, thereby avoided because intervertebral height loses or the secondary nerve damage that intervertebral space sinks and cause, reduced the rate of reoperation again.
At present, most of anterior cervical spine operations are fixed by adopting traditional steel plates, most of the anterior cervical spine operations are non-locking steel plates, the main materials of the anterior cervical spine operations are inert metals or alloy materials, good rigidity and support are obtained, stress shielding is often caused due to overlarge elastic modulus of the anterior cervical spine operations, meanwhile, an intervertebral fusion device or a titanium cage made of polyether-ether-ketone materials is generally used for filling autologous or allogeneic cancellous bone for bone grafting after cervical vertebra discectomy or vertebral body secondary total resection, the length of a screw is limited to be 12-14mm due to a small vertebral body, bicortical fixation is generally not selected for avoiding further compression of the spinal cord at the back, secondary sedimentation is often caused within a period of time after fixation, the screw loosening or withdrawing cannot be avoided, and the anterior cervical spine soft tissue injury, such as trachea, esophagus and the like, is caused under severe conditions.
Under the condition, a student carries out improvement on an internal fixing object, in 1986, morscher et al firstly apply an AO cervical vertebra locking steel plate, the system can enable the steel plate, a screw, a vertebral body and a bone grafting block to be connected into a firm whole, reduces the risk of loosening and slipping of the screw, enhances the stability of the cervical vertebra, improves the bone grafting fusion rate, can better maintain the intervertebral height and the physiological radian of the cervical vertebra, and greatly improves the operation safety. However, although the cervical vertebra locking steel plate belongs to strong internal fixation, the problem of stress shielding is not considered in the design, when asynchronous settlement occurs between the stress of the screw and the support of the vertebral body, the risk of the overall failure of the internal fixation is greatly increased, and along with the increase of the excision of the anterior cervical vertebra operation segments, the more the stability of the cervical vertebra is lost, the more the blood circulation damage is, and the higher the probability of the complications of the internal fixation is. And then complications such as intervertebral space and vertebral body height loss, pseudoarthropathy, kyphotic deformity and the like occur.
Therefore, an urgent need exists in the art to provide a combined integrated anti-subsidence anterior cervical fusion system with anti-subsidence, uniform stress and good stability.
Disclosure of Invention
In view of this, the invention provides a combined integrated anti-sedimentation anterior cervical fusion system, which aims to solve the problems in the background art, prevent sedimentation of an intervertebral fusion device when fixing cervical vertebrae and the intervertebral fusion device, and realize uniform stress and good stability.
In order to achieve the purpose, the invention adopts the following technical scheme:
the inner fixing plate is provided with through holes at four angular positions, and the center of the inner fixing plate is provided with a mounting hole;
the interbody fusion cage is arranged in the middle of the inner fixing plate, and is provided with a threaded hole;
the conical screw penetrates through the mounting hole in the inner fixing plate and is in threaded connection with the threaded hole in the intervertebral fusion device;
and the bone nail is arranged at the through hole and used for fixing the inner fixing plate.
Furthermore, the inner fixing plate is a rectangular plate, and the cross section of the inner fixing plate is of an arc structure with two ends bent towards the interbody fusion cage.
Further, the interbody fusion cage is of a U-shaped structure, and an opening of the interbody fusion cage faces the inner fixing plate.
Furthermore, the position that the interior fixed plate with interbody fusion cage contact, be provided with the recess that is used for mortise-tenon joint on the interior fixed plate, interbody fusion cage is last to be provided with the lug that is used for mortise-tenon joint, through the recess with the cooperation of lug is in order to realize the interior fixed plate with interbody fusion mortise-tenon joint.
Furthermore, the diameter of the threaded hole is the same as the diameter of the end part of the screwing end of the conical screw, and the diameter of the conical screw from the end part of the screwing end to the other end is gradually increased.
Further, the inner fixing plate and the intervertebral fusion cage are both made of a resin composition composed of polyether ketone resin and fluororesin, and the mass ratio of the resin composed of polyether ketone resin and fluororesin in the composition is 95:5 to 50:50 wherein the fluororesin has an average dispersed particle diameter of 0.30 μm or less.
Through the technical scheme, compared with the prior art, the invention discloses and provides a combined type integrated anti-sedimentation anterior cervical fusion system. Through with interbody fusion cage and interior fixed plate threaded connection, can realize the technological effect of operation in the convenient art, reduction operation time and easy to assemble, reduce the postoperative simultaneously because the different stress that leads to of elastic modulus shelters from and the secondary sinks the asynchronous interior fixed failure that appears, reduces the formation of postoperative artifact simultaneously.
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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is an installation schematic view of a combined integrated anti-subsidence anterior cervical fusion system provided by the invention;
FIG. 2 is a front view of a fixing plate in the combined integrated anti-subsidence anterior cervical fusion system provided by the invention;
FIG. 3 is a left side view of an inner fixing plate in the combined integrated anti-subsidence anterior cervical fusion system provided by the invention;
FIG. 4 is a schematic view of an intervertebral cage of the combined integrated anti-subsidence anterior cervical fusion system according to the present invention;
fig. 5 is a schematic view of a cone-shaped screw of a combined integrated anti-settling anterior cervical fusion system provided by the invention.
Wherein: 1 is an inner fixed plate; 11 is a through hole; 12 is a mounting hole; 2 is an intervertebral fusion device; 21 is a threaded hole; 3 is a conical screw; and 4, bone nails.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the embodiment of the invention discloses a combined integrated anti-sedimentation anterior cervical fusion system, which comprises:
the internal fixation plate 1, four angular positions on the internal fixation plate 1 all are provided with through- hole 11, and 1 central point of internal fixation plate puts and is provided with mounting hole 12, and in this embodiment, internal fixation plate 1 is used for laminating with the cervical vertebra to fix interbody fusion cage 2 on the affected part of cervical vertebra.
The interbody fusion cage 2 is arranged in the middle of the inner fixing plate 1, and a threaded hole 21 is formed in the interbody fusion cage 2;
the conical screw 3 penetrates through the mounting hole 12 on the inner fixing plate 1 and is in threaded connection with a threaded hole 21 on the intervertebral fusion device 1;
The internal fixation plate 1 is a rectangular plate, the cross section of the internal fixation plate 1 is an arc structure with two ends bent towards the interbody fusion cage 2, and in the embodiment, the sharp corners of the internal fixation plate 1 are provided with chamfers.
The interbody fusion cage 2 is in a U-shaped structure, and the opening of the interbody fusion cage 2 faces the inner fixing plate 1. The interior fixed plate with the position of interbody fusion cage contact, be provided with the recess that is used for mortise-tenon joint on the interior fixed plate, be provided with the lug that is used for mortise-tenon joint on the interbody fusion cage, through the recess with the cooperation of lug, in order to realize the interior fixed plate with interbody fusion cage mortise-tenon joint. Through interior fixed plate 1 and 2 mortise-tenon joints of interbody fusion cage, both made things convenient for the operation in the art, reduce operation time, easy to assemble reduces the postoperative simultaneously because the different stress that leads to of elastic modulus shelters from and the secondary sinks the asynchronous interior fixed failure that appears, reduces the formation of postoperative artifact simultaneously, the postoperative follow-up of being convenient for visits and appraises. The diameter of the threaded hole 21 is the same as the diameter of the end part of the screwing end of the conical screw 3, and the diameter of the conical screw 2 from the end part of the screwing end to the other end is gradually increased.
When the interbody fusion cage 2 is used, the conical screws 3 are screwed in the interbody fusion cage 2, the U-shaped structures of the interbody fusion cage 2 are expanded through the increase of the diameters of the conical screws 3, the interbody fusion cage 2 is further fixed with the further mortise and tenon of the inner fixing plate 1, meanwhile, the interbody fusion cage 2 positioned in the vertebral body gradually forms wedge-shaped change of front height and back height, the physiological curvature of the reconstructed cervical lordosis is further improved, the intervertebral space is properly expanded, the rear intervertebral space is further decompressed, and finally, the head and the tail ends of the inner fixing plate 1 are fixed in the middle of the vertebral body, so that the obtained decompression and orthopedic effects are maintained.
The inner fixing plate 1 and the interbody fusion cage 2 are both made of resin composition consisting of polyether ketone resin and fluororesin, and the mass ratio of the resin consisting of the polyether ketone resin and the fluororesin in the composition is 95:5 to 50:50, wherein the fluororesin has an average dispersed particle diameter of 0.30 μm or less, has a modulus close to that of cortical bone, and can minimize the influence of an implant device on bone density by maintaining normal stress of surrounding bone tissues. Compared with unmodified polyether ether ketone, the material has higher strength, and is an excellent choice for structural, load-bearing and implantable medical equipment materials for spinal surgeries. Because the intensity is high, can reduce the size and dimension of implantation nature apparatus, reduce the material and implant preceding occupy-place effect of vertebra to can realize lower incisura, have the tissue friendly. Meanwhile, the polyether-ether-ketone material has excellent creep resistance and can bear long-term fatigue stress.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present 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. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. The utility model provides a modular integration prevents subsiding anterior cervical fusion system which characterized in that includes:
the inner fixing plate is provided with through holes at four angular positions, and a mounting hole is formed in the center of the inner fixing plate;
the interbody fusion cage is arranged in the middle of the inner fixing plate and is provided with a threaded hole;
the conical screw penetrates through the mounting hole in the inner fixing plate and is in threaded connection with the threaded hole in the interbody fusion cage;
and the bone nail is arranged at the through hole and used for fixing the internal fixing plate.
2. The combined integrated anti-sedimentation anterior cervical fusion system according to claim 1, wherein the inner fixing plate is a rectangular plate, and the cross section of the inner fixing plate is an arc-shaped structure with two ends bent towards the intervertebral fusion device.
3. The combined integrated anti-subsidence anterior cervical fusion system of claim 1, wherein the interbody cage is U-shaped, with its opening facing the inner fixation plate.
4. The combined type integrated anti-sedimentation anterior cervical fusion system according to claim 1, wherein at a position where the inner fixing plate and the interbody fusion cage are in contact, a groove for mortise and tenon connection is formed in the inner fixing plate, and a projection for mortise and tenon connection is formed in the interbody fusion cage, and the mortise and tenon connection between the inner fixing plate and the interbody fusion cage is realized through the cooperation of the groove and the projection.
5. The combined integrated anti-subsidence anterior cervical fusion system of claim 1, wherein the diameter of the threaded hole is the same as the diameter of the end of the screw-in end of the conical screw, and the diameter of the conical screw gradually increases from the diameter of the end of the screw-in end to the diameter of the other end.
6. The combined integrated anti-subsidence anterior cervical fusion system according to claim 1, wherein the inner fixing plate and the intervertebral fusion cage are both made of a resin composition consisting of polyether ketone resin and fluororesin, and the mass ratio of the resin consisting of polyether ketone resin and fluororesin in the composition is 95:5 to 50:50 wherein the fluororesin has an average dispersed particle diameter of 0.30 μm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211148858.3A CN115414106A (en) | 2022-09-21 | 2022-09-21 | Combined integrated anti-sedimentation anterior cervical fusion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211148858.3A CN115414106A (en) | 2022-09-21 | 2022-09-21 | Combined integrated anti-sedimentation anterior cervical fusion system |
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| CN115414106A true CN115414106A (en) | 2022-12-02 |
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| CN202211148858.3A Pending CN115414106A (en) | 2022-09-21 | 2022-09-21 | Combined integrated anti-sedimentation anterior cervical fusion system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117860445A (en) * | 2024-03-11 | 2024-04-12 | 四川大学华西医院 | Anterior cervical internal fixation system |
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2022
- 2022-09-21 CN CN202211148858.3A patent/CN115414106A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117860445A (en) * | 2024-03-11 | 2024-04-12 | 四川大学华西医院 | Anterior cervical internal fixation system |
| CN117860445B (en) * | 2024-03-11 | 2024-05-28 | 四川大学华西医院 | Anterior cervical internal fixation system |
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