LU504054B1 - Fixing system for the eccentrically placed nail plate at cervical vertebra anterior c2/3 - Google Patents
Fixing system for the eccentrically placed nail plate at cervical vertebra anterior c2/3 Download PDFInfo
- Publication number
- LU504054B1 LU504054B1 LU504054A LU504054A LU504054B1 LU 504054 B1 LU504054 B1 LU 504054B1 LU 504054 A LU504054 A LU 504054A LU 504054 A LU504054 A LU 504054A LU 504054 B1 LU504054 B1 LU 504054B1
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- LU
- Luxembourg
- Prior art keywords
- holes
- nail
- group
- plate
- cervical vertebra
- Prior art date
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- 230000007704 transition Effects 0.000 claims abstract description 4
- 238000002513 implantation Methods 0.000 claims description 8
- 239000002861 polymer material Substances 0.000 claims description 6
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 3
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 229920002530 polyetherether ketone Polymers 0.000 claims description 3
- 238000000034 method Methods 0.000 description 5
- 230000000638 stimulation Effects 0.000 description 5
- 210000003238 esophagus Anatomy 0.000 description 4
- 210000000988 bone and bone Anatomy 0.000 description 3
- 210000000056 organ Anatomy 0.000 description 3
- 230000004927 fusion Effects 0.000 description 2
- 230000002980 postoperative effect Effects 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- 210000003437 trachea Anatomy 0.000 description 2
- 208000019505 Deglutition disease Diseases 0.000 description 1
- 208000037408 Device failure Diseases 0.000 description 1
- 208000006687 Esophageal Fistula Diseases 0.000 description 1
- 206010065835 Oesophageal fistula Diseases 0.000 description 1
- 210000003484 anatomy Anatomy 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002594 fluoroscopy Methods 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000000451 tissue damage Effects 0.000 description 1
- 231100000827 tissue damage Toxicity 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- 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, setting implements or the like
- 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 ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7059—Cortical plates
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Neurology (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
- Prostheses (AREA)
Abstract
The invention relates to a fixing system for the eccentrically placed nail plate at cervical vertebra anterior C2/3, which comprises a fixing plate, which is L-shaped, and the inner side margin is thinner than the outer side margin; the fixing plate is provided with the first group of nail holes and the second group of nail holes; the first group of nail holes consists of three circular holes, and the three holes are longitudinally arranged along the L-shaped long side direction; the second group of nail holes are arranged in a upside-down triangular shape; the transition part of the inner side margin is an oblique arc. The first group of nail holes are inclined holes, and the axis is inclined towards the direction of the inner side margin of the top end of the fixing plate; the second group of nail holes are inclined holes.
Description
FIXING SYSTEM FOR THE ECCENTRICALLY PLACED NAIL PLATE AT
CERVICAL VERTEBRA ANTERIOR C2/3
The invention belongs to the technical field of orthopedic surgical medical instruments in clinical medicine, and particularly relates to a fixing system for the eccentrically placed nail plate at cervical vertebra anterior C2/3.
The cervical vertebra anterior anatomical structure is complex, and there are many important blood vessels, nerves and organs. In the process of cervical vertebra anterior surgery exposure, it is necessary to identify carefully and protect the important structures, and strive to achieve clear exposure with minimal tissue damage. Among them, C2 structure is particularly special: the anterior margin of C2 bulges obliquely downward gradually, and the anterior pharyngeal posterior wall tissue is thin, so it has poor tolerance to traction stimulation.
There are some problems when the conventional cervical vertebra anterior nail plate system 1s applied to C2 and C3 fusion: 1) it is difficult to pull the midline structure to the opposite side and expose, and it is difficult to set screws on the opposite side of the incision, which is inconvenient to operate. If it is fully exposed, it will stimulate the throat tissue obviously; 2) the fixed plate is placed in the center, which will stimulate the local structure after implantation easily, causing discomfort such as foreign body sensation in the throat and dysphagia; 3) the fixation strength is relatively insufficient, and it is easy to cause internal fixation failure due to screw pulling out and cutting; and 4) severe complications such as esophageal fistula are easy to occur when the midline structure is pulled for a long time.
Purpose of the invention: The purpose of the invention is to design a fixing system for the eccentrically placed nail plate at cervical vertebra anterior C2/3, so as to reduce the above shortcomings or complications.
Technical scheme:
The invention relates to a fixing system for the eccentrically placed nail plate at cervical
? LU504054 vertebra anterior C2/3, wherein: the fixing plate 1s L-shaped, and the inner side margin 1s thinner than the outer side margin; the fixing plate is provided with the first group of nail holes and the second group of nail holes; the first group of nail holes consists of three circular holes, and the three holes are longitudinally arranged along the L-shaped long side direction; the second group of nail holes are arranged in a upside-down triangular shape; the transition part of the inner side margin is an oblique arc; the first group of nail holes are inclined holes, and the axis is inclined towards the direction of the inner side margin of the top end of the fixing plate; the second group of nail holes are inclined holes, and the axis is inclined towards the direction of the inner side margin.
The fixing system for the eccentrically placed nail plate at cervical vertebra anterior C2/3, preferably, the top of the long side of the fixing plate is pointed, the oblique side forms an included angle of 70-75° with the long side of the fixing plate, and the top of the pointed end is fillet.
The fixing system for the eccentrically placed nail plate at cervical vertebra anterior C2/3, preferably, the direction of screw implantation through the nail holes is diagonally opposite and parallel to the incision direction.
The fixing system for the eccentrically placed nail plate at cervical vertebra anterior C2/3, preferably, the fixing plate is a plate structure made of titanium alloy or polymer material.
The fixing system for the eccentrically placed nail plate at cervical vertebra anterior C2/3, preferably, the polymer material is polyether ether ketone or carbon fiber.
The axis of the first group of nail holes deviates from the normal of the fixing plate by 12- 15°.
The axis of the second group of nail holes deviates from the normal of the fixing plate by 14-17°.
Advantages and effects: 1. The eccentric placement of the fixing plate makes it close to zero notch in the center of the front of the vertebral body, which reduces the stimulation to the esophagus after implantation, thus reducing the incidence of postoperative throat discomfort and improving the satisfaction rate of the operation. 2. The nail hole is a locking hole, and the nail plate system becomes a whole after the
’ LU504054 screws are implanted, which increases the fixing strength and prevents the screws from slipping out. 3. Three screws can be implanted in C2 vertebral body and odontoid process, which can increase the holding force of screws and reduce the incidence of implant failure. 4. The direction of screws implantation is oblique to the opposite side, which is nearly parallel to the incision direction, and it has less traction on the midline organs and reduces related complications. 5. The inner margin of the fixing plate (near the midline side) is thin and inclined arc, which further reduces the notch to reduce the stimulation to the trachea and esophagus; and the outer margin of the fixing plate is slightly thicker to increase the fixing strength.
Fig. 1 is a schematic view of a fixing plate;
Fig. 2 is an enlarged view of the first group of holes;
Fig. 3 is an enlarged view of the second group of holes;
Fig. 4 is a schematic view of the inclination of the first group of holes;
Fig. 5 is a schematic view of the inclination of the second group of holes.
Marks in the figures: 1. inner margin; 2. outer margin; 3. the first group of nail holes; 4. the second group of nail holes.
The present invention will be described in detail with reference to the attached figures.
The application is a fixing system for the eccentrically placed nail plate at cervical vertebra anterior C2/3, which comprises: a fixing plate, which is L-shaped, and the inner side margin 1 is thinner than the outer side margin 2; the L-shaped structure can make the fixing plate eccentrically placed, so as to make it close to zero notch in the center of the front of the vertebral body, which reduces the stimulation to the esophagus after implantation, thus reducing the incidence of postoperative throat discomfort and improving the satisfaction rate of the operation.
The fixing plate is provided with the first group of nail holes 3 and the second group of nail holes 4; the first group of nail holes 3 consists of three circular holes, and the three holes are longitudinally arranged along the L-shaped long side direction. This design is based on the
! LU504054 anatomical shape of the dentata vertebral body and odontoid process with smaller transverse diameter, oblique diameter and anterior-posterior diameter and larger longitudinal diameter.
The anterior-posterior diameter and oblique diameter are small, so the screws are short, and the fixing strength of two screws 1s low, which 1s easy to cause internal fixation failure. Therefore, three screws are selected for fixation, and the three screws can achieve "three-point" stability, and the ability to resist extension, flexion, rotation and lateral flexion is greatly improved. The second group of nail holes 4 are arranged in a upside-down triangular shape. This is also based on the anatomical characteristics of C3 vertebral body: the vertebral body is wide, but all of them are cancellous bones, and the screws holding force is poor, and the "three-point" stable structure of three screws increases the fixing strength; and the nail hole is a locking hole, and the nail plate system becomes a whole after the screws are implanted, which increases the fixing strength and prevents the screws from slipping out.
The first group of nail holes are inclined holes, and the axis is inclined towards the direction of the inner side margin of the top end of the fixing plate; the second group of nail holes are inclined holes, and the axis is inclined towards the direction of the inner side margin.
This design can make the implanted nail incline, and the screws implantation direction is oblique to the opposite side (the screws on C2 vertebral body and odontoid process are inclined to the head end at the same time, and the inclination of the uppermost screw is the largest, which is convenient for placement), which is nearly parallel to the incision direction. Compared with the traditional surgical method, this can play a role in reducing the traction on the midline organs and reducing related complications.
The transition part of the inner side margin 1 is an oblique arc, so as to further reduce the notch to reduce the stimulation to the trachea and esophagus.
The top of the long side of the fixing plate is pointed, the oblique side forms an included angle of 70-75° with the long side of the fixing plate, and the top of the pointed end is fillet.
The direction of screw implantation through the nail holes is diagonally opposite and parallel to the incision direction.
The fixing plate is a plate structure made of titanium alloy or polymer material.
The axis of the first group of nail holes deviates from the normal of the fixing plate by 12- 15°. The most prefer angle is 14°. The axis of the second group of nail holes deviates from the normal of the fixing plate by 14-17°. The most prefer angle is 16°. The polymer material is polyether ether ketone or carbon fiber or other new materials with similar strength.
The technical scheme is further described below through embodiments. But the scope of
) LU504054 protection is not limited to this embodiment.
Embodiment 1:
Disinfect and lay a sheet, make a transverse incision in the anterior cervical vertebra, enter layer by layer, expose the vertebral body, confirm by fluoroscopy, perform C2 and C3 discectomy and decompression until the dural sac swells without impression, rinse and stop bleeding, implant an appropriate type of intervertebral fusion cage filled with autologous bone or artificial bone, and place the fixing system for the eccentrically placed nail plate at cervical vertebra anterior C2/3. Place the drainage tube and sew it layer by layer. Finish the operation.
Claims (7)
1. À fixing system for the eccentrically placed nail plate at cervical vertebra anterior C2/3, wherein: the fixing plate is L-shaped, and the inner side margin (1) is thinner than the outer side margin (2); the fixing plate is provided with the first group of nail holes (3) and the second group of nail holes (4); the first group of nail holes (3) consists of three circular holes, and the three holes are longitudinally arranged along the L-shaped long side direction; the second group of nail holes (4) are arranged in a upside-down triangular shape; the transition part of the inner side margin (1) is an oblique arc; the first group of nail holes (3) are inclined holes, and the axis is inclined towards the direction of the inner side margin (1) of the top end of the fixing plate; the second group of nail holes (4) are inclined holes, and the axis is inclined towards the direction of the inner side margin (1).
2. The fixing system for the eccentrically placed nail plate at cervical vertebra anterior C2/3, as claimed in claim 1, wherein, the top of the long side of the fixing plate is pointed, the oblique side forms an included angle of 70-75° with the long side of the fixing plate, and the top of the pointed end is fillet.
3. The fixing system for the eccentrically placed nail plate at cervical vertebra anterior C2/3, as claimed in claim 1, wherein, the direction of screw implantation through the nail holes is diagonally opposite and parallel to the incision direction.
4. The fixing system for the eccentrically placed nail plate at cervical vertebra anterior C2/3, as claimed in claim 1, wherein, the fixing plate is a plate structure made of titanium alloy or polymer material.
5. The fixing system for the eccentrically placed nail plate at cervical vertebra anterior C2/3, as claimed in claim 4, wherein, the polymer material is polyether ether ketone or carbon fiber.
6. The fixing system for the eccentrically placed nail plate at cervical vertebra anterior C2/3, as claimed in claim 1, wherein, the axis of the first group of nail holes (3) deviates from the normal of the fixing plate by 12-15°.
7. The fixing system for the eccentrically placed nail plate at cervical vertebra anterior C2/3, as claimed in claim 1, wherein, the axis of the second group of nail holes (4) deviates from the normal of the fixing plate by 14-17°.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU504054A LU504054B1 (en) | 2023-04-24 | 2023-04-24 | Fixing system for the eccentrically placed nail plate at cervical vertebra anterior c2/3 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU504054A LU504054B1 (en) | 2023-04-24 | 2023-04-24 | Fixing system for the eccentrically placed nail plate at cervical vertebra anterior c2/3 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU504054B1 true LU504054B1 (en) | 2023-10-24 |
Family
ID=88469819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU504054A LU504054B1 (en) | 2023-04-24 | 2023-04-24 | Fixing system for the eccentrically placed nail plate at cervical vertebra anterior c2/3 |
Country Status (1)
| Country | Link |
|---|---|
| LU (1) | LU504054B1 (en) |
-
2023
- 2023-04-24 LU LU504054A patent/LU504054B1/en active IP Right Grant
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG | Patent granted |
Effective date: 20231024 |