CN115462886A - Zero-notch nail rod system and implantation method - Google Patents
Zero-notch nail rod system and implantation method Download PDFInfo
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- CN115462886A CN115462886A CN202210954416.1A CN202210954416A CN115462886A CN 115462886 A CN115462886 A CN 115462886A CN 202210954416 A CN202210954416 A CN 202210954416A CN 115462886 A CN115462886 A CN 115462886A
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- 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
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
- A61B17/7014—Longitudinal elements, e.g. rods with means for adjusting the distance between two screws or hooks
-
- 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
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
- A61B17/7019—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other
-
- 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
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
- A61B17/7019—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other
- A61B17/7025—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other with a sliding joint
-
- 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
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
-
- 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
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
- A61B17/704—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other the longitudinal element passing through a ball-joint in the screw head
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- 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 discloses a zero-notch nail rod system and an implantation method, belonging to the technical field of medical instruments, wherein the system comprises at least two groups of zero-notch nail rod components and a pressurizing component arranged between the two groups of zero-notch nail rod components, and each zero-notch nail rod component comprises a zero-notch nail cap, a pedicle nail and an expansion ball liner; the zero-notch nail cap is provided with a spherical groove, and the bottom of the spherical groove is provided with a movable hole; the pedicle screw comprises a screw body penetrating through the movable hole and a rotating head arranged at one end of the screw body, wherein the rotating head is provided with a guide outer conical surface, and active pressurizing threads are distributed on the guide outer conical surface; the expansion ball lining is embedded in the spherical groove, a pressurizing hole is formed in the expansion ball lining, a guide inner conical surface is arranged on the hole wall of the pressurizing hole, passive pressurizing threads are distributed on the guide inner conical surface, and an open groove is formed in the expansion ball lining. The nail rod system and the implanting method can enable a patient not to feel foreign body sensation after operation, improve the satisfaction degree of the patient after operation, have complete overall functions and strong practicability.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a zero-notch nail rod system and an implantation method.
Background
The posterior vertebral pedicle screw internal fixation technology is widely applied to clinic as a mature spinal surgery. Traditional nail stick structure utilizes U type head of a nail, pedicle of vertebral arch nail and titanium stick combination to fix, because need use under the cooperation that compresses tightly the plug screw between U type head of a nail and titanium stick, can reach the locking effect, the height of U type head of a nail like this is higher, and the U type head of a nail of higher notch takes for patient's postoperative foreign body sensation. At present, the height of a common U-shaped nail cap is about 17mm, the lumbar vertebra part is protruded after the nail cap is implanted into a human body, the comfort level of a patient in the supine process is influenced, and the overall effect is not good. Accordingly, the invention provides a zero-notch nail rod system and an implantation method.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a zero-notch nail rod system and an implantation method.
In order to solve the technical problem, the invention aims to realize that: the invention relates to a zero-notch nail rod system which comprises at least two groups of zero-notch nail rod components and a pressurizing component arranged between the two groups of zero-notch nail rod components, wherein each zero-notch nail rod component comprises a zero-notch nail cap, a pedicle nail and an expansion ball liner;
a spherical groove for the expansion ball lining to rotate in a universal direction is dug on the zero-notch nail cap, and a movable hole for the pedicle nail to swing in is formed at the bottom of the spherical groove;
the pedicle screw comprises a screw body penetrating through the movable hole and a rotating head arranged at one end of the screw body, the rotating head is arranged in the spherical groove, the rotating head is provided with a guide outer conical surface, active pressurizing threads are distributed on the guide outer conical surface, and the pedicle screw is provided with a through hole extending along the length direction of the pedicle screw;
the expansion ball lining is embedded in the spherical groove, a pressurizing hole for embedding the rotating head is formed in the expansion ball lining, a guide inner conical surface matched with the guide outer conical surface is arranged on the hole wall of the pressurizing hole, passive pressurizing threads matched with the active pressurizing threads are distributed on the guide inner conical surface, and an open groove penetrating through the inside and the outside is formed in the expansion ball lining.
The invention is further configured to: the pressurizing assembly comprises a pressurizing sleeve with an inner wall surface provided with internal threads and a pressurizing screw rod with an outer wall surface provided with external threads, one end of the pressurizing screw rod is connected to the pressurizing sleeve in a threaded mode, and the other end of the pressurizing screw rod is connected to the zero-notch nail cap.
The invention is further configured to: the outer wall surface of the pressurizing sleeve is provided with an outer hexagonal wrenching structure.
The invention is further configured to: and the outer wall surface of the expansion ball lining is provided with expansion guide grooves communicated with two adjacent open grooves.
The invention is further configured to: the rotating head is provided with a non-rotating columnar pulling and rotating groove in an excavating way.
The invention is further configured to: the nail body is provided with cortical bone threads close to the rotating head and cancellous bone threads far away from the rotating head.
The invention is further configured to: the conicity of the inner guiding conical surface and the conicity of the outer guiding conical surface are both 12 degrees.
The invention is further configured to: the pedicle screw and the pressurizing sleeve are both made of cobalt-chromium-molybdenum alloy materials.
The invention is further configured to: the expansion ball lining is made of titanium alloy material.
The invention relates to an implantation method of a zero-notch nail rod system, which comprises the following steps:
s1, taking a patient in a prone position, cutting open the skin, and inserting a guide pin for positioning;
s2, expanding cortex along the guide pin by using an open cone and then tapping by using a screw tap;
s3, firstly placing a zero-notch nail cap at the vertebral pedicle, then installing an expansion ball liner into the vertebral pedicle nail, and then pre-screwing the vertebral pedicle nail into the body;
s4, connecting two zero-notch nail caps by using a pressurizing sleeve, then loading the two zero-notch nail caps into the pedicle screws through an expansion ball lining, and then pre-screwing the pedicle screws into the body;
s5, adjusting the relative position of the zero-notch screw cap by rotating the pressurizing sleeve, then taking out the guide pin, screwing the pedicle screw by using the screw feeder, simultaneously placing the expansion ball lining into the spherical groove of the screw cap, and expanding and fixing the expansion ball lining and the spherical groove while screwing the pedicle screw.
In conclusion, the invention has the following beneficial effects:
1. the zero-incisura nail cap is adopted, the height of the nail cap is small, and foreign body sensation is avoided after the nail cap is implanted into a human body;
2. the expansion type structure is convenient to install, the multi-angle is controllable, and compared with the existing structure, the structure has fewer parts;
3. the screw thread of the zero-notch nail rod is matched with the pressurizing sleeve for use, so that the inward pressurizing or outward expanding effect can be realized.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a portion of the structure of the present invention;
FIG. 3 is a schematic view of the internal structure of FIG. 2;
FIG. 4 is a schematic view of the present invention showing a zero notch nut;
FIG. 5 is a schematic view of a pedicle screw embodying the invention;
FIG. 6 is a schematic structural view of the present invention for embodying an inflatable ball liner;
fig. 7 is a schematic structural view of the pressurizing sleeve embodying the present invention.
Detailed Description
For a better understanding of the technical solutions of the present invention, the following preferred embodiments of the present invention are described in conjunction with the specific examples, but it should be understood that the descriptions are only for the purpose of further illustrating the features and advantages of the present invention, and are not intended to limit the patent claims of the present invention. 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.
The invention will be further described with reference to the accompanying drawings and preferred embodiments.
Example 1
Referring to fig. 1 to 7, the zero-notch nail rod system according to the present embodiment includes at least two sets of zero-notch nail rod assemblies, and a pressurizing assembly disposed between the two sets of zero-notch nail rod assemblies, wherein the zero-notch nail rod assemblies include a zero-notch nail cap 10, a pedicle nail 20, and an expansion ball liner 30;
a spherical groove 11 for the expansion ball liner 30 to rotate in a universal direction is dug in the zero-notch nail cap 10, and a movable hole 12 for the pedicle nail 20 to swing in is formed in the bottom of the spherical groove 11; the pedicle screw 20 comprises a screw main body 21 penetrating through the movable hole 12 and a rotating head 22 arranged at one end of the screw main body 21, the rotating head 22 is arranged in the spherical groove 11, the rotating head 22 is provided with a guiding outer conical surface, active pressurizing threads 23 are distributed on the guiding outer conical surface, and a through hole extending along the length direction of the pedicle screw 20 is formed in the pedicle screw; the expansion ball lining 30 is embedded in the spherical groove 11, a pressurizing hole 31 for embedding the rotating head 22 is formed in the expansion ball lining 30, a guiding inner conical surface matched with the guiding outer conical surface is arranged on the hole wall of the pressurizing hole 31, passive pressurizing threads 32 matched with the driving pressurizing threads 23 are distributed on the guiding inner conical surface, and an opening groove 33 penetrating through the inside and the outside is formed in the expansion ball lining 30.
Further, the pressurizing assembly comprises a pressurizing sleeve 40 with internal threads distributed on the inner wall surface and a pressurizing screw 41 with external threads distributed on the outer wall surface, wherein one end of the pressurizing screw 41 is connected to the pressurizing sleeve 40 in a threaded manner, and the other end of the pressurizing screw is connected to the zero-notch nail cap 10.
Further, the outer wall surface of the pressing sleeve 40 has an outer hexagonal wrench structure 42.
Furthermore, the outer wall surface of the expansion ball liner 30 is provided with expansion guide grooves 34 which are communicated with two adjacent open grooves 33.
Furthermore, a turning groove 24 in a non-rotary column shape is dug on the rotating head 22.
Furthermore, the nail body 21 is provided with a cortical bone thread 25 close to the screw head and a cancellous bone thread 26 far away from the screw head.
Further, the conicity of the guiding inner conical surface and the guiding outer conical surface is 12 degrees.
Further, the pedicle screw 20 and the pressure sleeve 40 are both made of cobalt-chromium-molybdenum alloy materials.
Further, the expansion ball liner 30 is made of a titanium alloy material.
A method of implanting a zero notch nail rod system comprising the steps of:
s1, taking a patient in a prone position, cutting open the skin, and inserting a guide pin for positioning;
s2, expanding cortex along the guide pin by using an open cone and then tapping by using a screw tap;
s3, firstly placing a zero-notch nail cap at the vertebral pedicle, then installing an expansion ball liner into the vertebral pedicle nail, and then pre-screwing the vertebral pedicle nail into the body;
s4, connecting two zero-notch nail caps by using a pressurizing sleeve, then loading the two zero-notch nail caps into the pedicle screws through an expansion ball lining, and then pre-screwing the pedicle screws into the body;
s5, rotating the pressurizing sleeve to adjust the relative position of the zero-notch screw cap, taking out the guide pin, screwing the pedicle screw by using the screw feeder, simultaneously placing the expansion ball liner into the spherical groove of the screw cap, and expanding and fixing the expansion ball liner and the spherical groove while screwing the pedicle screw.
In this embodiment, first, the rotating head 22 is not completely screwed into the pressurizing hole 31, the expansion ball liner 30 can rotate relatively in the spherical groove 11, the pedicle screw 20 can swing in the movable hole 12, so as to adjust the fixing position, after the position adjustment is completed, a pulling tool is inserted into the pulling groove 24, the rotating head 22 is rotated, under the combined action of the mutually engaged driving pressurizing screw 23 and driven pressurizing screw 32, the rotating head 22 continuously penetrates into the pressurizing hole 31, the expansion ball liner 30 is expanded, the expansion ball liner 30 is deformed through the open slot 33, so that the expansion ball liner 30 is tensioned and fixed on the zero-notch nail cap 10, the pedicle screw 20 is tightly matched with the expansion ball liner 30, and the fixing of the zero-notch rod assembly is completed.
The pressurizing sleeve 40 can be rotated clockwise by turning the pressurizing sleeve 40, so that the two pressurizing screws 41 are continuously screwed into the pressurizing sleeve 40, the distance between the two zero-notch nail rod assemblies connected with the pressurizing sleeve is reduced, and the pressurizing effect is achieved; conversely, the pressurization pressure may be decreased.
By arranging the expansion guide groove 34, the expansion ball lining 30 has more obvious deformation degree, better tensioning effect and more firm locking when being subjected to expansion force from inside to outside; and through the opening of the expansion guide groove 34, the outer surface of the expansion ball liner 30 is uneven, friction is increased, and the locking effect is further improved.
The inside of the pedicle screw is provided with a through hole, the through hole is used for passing through a guide pin for positioning, the pedicle screw is conveniently driven into the spine of a human body, and the diameter of the through hole is 1mm-1.5mm.
The zero-notch nail rod system and the implantation method have the advantages that the zero-notch nail cap is adopted, the height of the nail cap is small, and foreign body sensation is avoided after the zero-notch nail rod system is implanted into a human body; the expansion type structure is convenient to install and controllable in multiple angles, and compared with the existing structure, the structure has fewer parts; and the screw thread of the zero-notch nail rod is matched with the pressurizing sleeve for use, so that the effect of inward pressurizing or outward expanding can be realized, the integral function is complete, and the practicability is high.
Unless otherwise specified, in the present invention, if the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship indicated based on the actual shown orientation or positional relationship, it is only for convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, therefore, the terms describing the orientation or positional relationship in the present invention are only used for exemplary illustration and are not to be construed as limiting the patent, and the specific meaning of the above terms can be understood according to the specific situation by a person skilled in the art in conjunction with the embodiments.
Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. The zero-notch nail-bar system comprises at least two groups of zero-notch nail-bar components and a pressurizing component arranged between the two groups of zero-notch nail-bar components, and is characterized in that the zero-notch nail-bar components comprise zero-notch nail caps, pedicle nails and expansion ball liners;
a spherical groove for the expansion ball lining to rotate in a universal direction is dug in the zero-notch nail cap, and a movable hole for the pedicle nail to swing in is formed in the bottom of the spherical groove;
the pedicle screw comprises a screw body penetrating through the movable hole and a rotating head arranged at one end of the screw body, the rotating head is arranged in the spherical groove, the rotating head is provided with a guide outer conical surface, active pressurizing threads are distributed on the guide outer conical surface, and the pedicle screw is provided with a through hole extending along the length direction of the pedicle screw;
the expansion ball lining is embedded in the spherical groove, a pressurizing hole for embedding the rotating head is formed in the expansion ball lining, a guide inner conical surface matched with the guide outer conical surface is formed in the hole wall of the pressurizing hole, passive pressurizing threads matched with the active pressurizing threads are distributed on the guide inner conical surface, and an open groove penetrating through the inside and the outside is formed in the expansion ball lining.
2. The zero-notch nail rod system according to claim 1, wherein the pressurizing assembly comprises a pressurizing sleeve with an inner wall surface provided with internal threads and a pressurizing screw rod with an outer wall surface provided with external threads, one end of the pressurizing screw rod is connected to the pressurizing sleeve in a threaded mode, and the other end of the pressurizing screw rod is connected to the zero-notch nail cap.
3. The zero-notch nail rod system according to claim 2, wherein the outer wall surface of the pressure sleeve has an outer hexagonal wrenching structure.
4. The zero-notch nail and rod system according to claim 3, wherein the outer wall surface of the expansion ball liner is provided with expansion guide grooves which are communicated with two adjacent open grooves.
5. The zero-notch nail rod system according to claim 4, wherein the rotating head is provided with a non-rotating cylindrical turning groove.
6. The zero-notch nail rod system according to claim 5, wherein the nail body is provided with cortical bone threads near the driver head and cancellous bone threads away from the driver head.
7. The zero-notch nail rod system according to claim 6, wherein the taper of the inner guiding conical surface and the taper of the outer guiding conical surface are both 12 °.
8. The zero-notch rod-nail system according to claim 7, wherein the pedicle nail and the pressure sleeve are both made of cobalt-chromium-molybdenum alloy material.
9. The zero-notch nail rod system of claim 8, wherein the expansion ball liner is a titanium alloy material.
10. A method of implanting a zero notch nail rod system according to claim 9, comprising the steps of:
s1, taking a patient in a prone position, cutting open the skin, and inserting a guide pin for positioning;
s2, expanding cortex along the guide pin by using an open cone and then tapping by using a screw tap;
s3, firstly placing a zero-notch nail cap at the vertebral pedicle, then installing an expansion ball liner into the vertebral pedicle nail, and then pre-screwing the vertebral pedicle nail into the body;
s4, connecting two zero-notch nail caps by using a pressurizing sleeve, then loading the two zero-notch nail caps into the pedicle screws through an expansion ball lining, and then pre-screwing the pedicle screws into the body;
s5, adjusting the relative position of the zero-notch screw cap by rotating the pressurizing sleeve, then taking out the guide pin, screwing the pedicle screw by using the screw feeder, simultaneously placing the expansion ball lining into the spherical groove of the screw cap, and expanding and fixing the expansion ball lining and the spherical groove while screwing the pedicle screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210954416.1A CN115462886A (en) | 2022-08-10 | 2022-08-10 | Zero-notch nail rod system and implantation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210954416.1A CN115462886A (en) | 2022-08-10 | 2022-08-10 | Zero-notch nail rod system and implantation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115462886A true CN115462886A (en) | 2022-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210954416.1A Pending CN115462886A (en) | 2022-08-10 | 2022-08-10 | Zero-notch nail rod system and implantation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115462886A (en) |
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2022
- 2022-08-10 CN CN202210954416.1A patent/CN115462886A/en active Pending
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