CN108186093B - Cushion block capable of generating switching function - Google Patents
Cushion block capable of generating switching function Download PDFInfo
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- CN108186093B CN108186093B CN201810108828.7A CN201810108828A CN108186093B CN 108186093 B CN108186093 B CN 108186093B CN 201810108828 A CN201810108828 A CN 201810108828A CN 108186093 B CN108186093 B CN 108186093B
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- Prior art keywords
- cushion block
- pedicle screw
- micro
- nail
- dynamic
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- 238000001356 surgical procedure Methods 0.000 claims abstract description 5
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 3
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000004927 fusion Effects 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 239000007943 implant Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000399 orthopedic effect Effects 0.000 description 2
- 206010050296 Intervertebral disc protrusion Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 206010025005 lumbar spinal stenosis Diseases 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 208000005198 spinal stenosis Diseases 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
- A61B17/7062—Devices acting on, attached to, or simulating the effect of, vertebral processes, vertebral facets or ribs ; Tools for such devices
- A61B17/7064—Devices acting on, attached to, or simulating the effect of, vertebral facets; Tools therefor
-
- 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
- A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
-
- 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
-
- 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8625—Shanks, i.e. parts contacting bone tissue
-
- 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
- A61B2017/564—Methods for bone or joint treatment
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Neurology (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)
Abstract
The application of the invention discloses a cushion block capable of generating a switching function, which is used for carrying out rigid fixation function conversion on a micro-motion pedicle screw applied to a bone surgery operation, so that the micro-motion pedicle screw popular in a dynamic fixation system at present can be converted into a universal pedicle screw belonging to the rigid fixation system through simple replacement by adding the cushion block, the application range of the micro-motion pedicle screw is expanded, clinical operation is facilitated, and stock is simplified.
Description
Technical Field
The invention relates to an implant applied to an orthopedic surgical instrument, which is suitable for clinical operations such as lumbar disc herniation, lumbar spinal stenosis and the like.
Background
In modern bone surgical treatment, for intervertebral disc surgery, single shaft nails, also known as staples, have been used in the early days; in order to facilitate the installation of the connecting rod (also called an orthopedic rod), the connecting rod is further improved into a multi-shaft nail in the same fixed fusion system, which is also called a universal nail; with the development of clinical theory, a new theory is generated, namely a dynamic fixing system theory, also called a non-fusion fixing system theory, namely a dynamic nail is used, and the requirements of the dynamic nail in clinic are as follows: after the connecting rod and the screw plug are locked, the ball stud together with the implanted vertebral body can slightly swing and float relative to the connecting rod, such as the application number 201620153647.2, and the micro-dynamic pedicle screw has the function required by the theory.
Along with further exploration of clinical theory and clinical practice, students find that the rigid fixation and the dynamic fixation are a pair of contradictory two sides, each has the characteristics and the functions, and if the two sides can be matched with each other in a 'mixed-lap' way, namely, in the same operation, the pedicle screw which belongs to the rigid fixation, such as a universal screw, and the pedicle screw which belongs to the dynamic fixation, such as a micro-dynamic screw, can avoid respective shortages, exert respective advantages and be beneficial to healing of vertebral bodies.
Disclosure of Invention
Aiming at clinical academic, a scholars put forward to 'mixed-lap' to use two different universal nails and micro-dynamic nails in cooperation, namely, rigid fixation and dynamic fixation, and the technical requirements of clinical operation are simplified, and a management department also puts forward a nail for multiple purposes, reduces the technical requirements of stock and stock preparation, saves cost and the like.
Consider that: regardless of the universal nail or the micro-dynamic nail, the using process is as follows: after the ball head nails are implanted into the vertebral body, connecting the nail seats by using a connecting rod, and locking by using a screw plug; the universal nail is different from the micro dynamic nail in that: after the screw plug is locked, the ball stud can still swing slightly relative to the stud base, namely the micro-dynamic stud; if the ball head nails are rigidly connected relative to the nail seat, the ball head nails are universal nails;
aiming at the difference between the universal nail and the micro-dynamic nail, the technical scheme of the invention is as follows: when the micro-dynamic nail is used, the connecting rod is only supported by the U-shaped groove and does not directly press the upper end surface of the ball head nail, and the upper end surface of the ball head nail is changed into: the connecting rod is no longer supported by the U-shaped groove, but is directly supported by the upper end surface of the ball stud; under the locking of the screw plug, the connecting rod presses the ball stud and is connected with the stud seat to form a rigid body, and the ball stud cannot swing any more, so that the original micro-state stud is switched into the universal stud which belongs to rigid fixation by adding the cushion block disclosed by the application of the invention, thereby meeting the clinical technical requirements and simultaneously achieving the technical effects of simple structure, easy operation, reversible operation, cost saving and the like;
the technical scheme adopted by the invention for solving the technical problems also comprises the following steps:
further, the cushion block, the main body is cylindrical, and the height of the cushion block is designed as follows: in the assembled micro-dynamic nail, the distance from the upper end face of the micro-dynamic nail to the bottom of the U-shaped groove of the nail seat is increased by 0.5-1 mm more than that of the upper end face of the ball head nail in a natural state, namely, under the premise of controlling the notch of the pedicle nail, the bottom of the U-shaped groove can be kept away after the cushion block is added, the connecting rod is not supported any more, and the connecting rod is supported by the upper end face of the cushion block.
Further, the main body is a cylindrical cushion block, and the diameter of the cylindrical cushion block is slightly smaller than the inner diameter of the inner cavity of the nail seat, so that the cushion block can be smoothly put into or taken out of the nail seat.
Further, the main body is a cylindrical cushion block and is provided with a notch corresponding to the protruding obstacle of the cavity in the nail seat so as to avoid interference with each other during insertion and extraction.
Further, the main body is a cylindrical cushion block, and a tool clamping interface which is convenient for placing or taking out the cushion block into or from the nail seat cavity by using a special tool is arranged.
Further, a protrusion is arranged at the lower part of the cushion block and is matched with a blind hole special for the screwing tool set on the upper end face of the ball head nail of the micro-dynamic pedicle screw, so that the positioning of the cushion block is facilitated, and meanwhile, the cushion block is also facilitated to be attached to the upper end face of the ball head nail.
Drawings
The drawings are listed below and the technical features of the present application are further elucidated by the drawings.
FIG. 1 is a schematic perspective view of two different views of the present invention;
FIG. 2 is a two-dimensional view of the principle of operation of a micro-dynamic fixation system;
FIG. 3 is a two-dimensional view of the working principle of the spacer block of the present invention for switching a micro-motion nail to a universal nail;
FIG. 4 is an effect diagram of the working principle of a micro-dynamic pin in a dynamic fixation system;
FIG. 5 is a schematic diagram illustrating the effect of the working principle of the cushion block according to the present invention;
wherein: 1, a cushion block; 11, the height H of the cushion block; 12, diameter D of the cushion block; 13, a notch on the cushion block; 14, a projection at the lower part of the cushion block; 15, clamping holes on the cushion blocks;
2, a micro-dynamic nail component switched by the invention;
21, a plug screw in the assembly; 22, a nail seat in the assembly; 221, protruding obstruction in the nail seat; 222, the bottom of the U-shaped groove in the nail seat; 223, cavities in the staple holder; 23, ball stud in the assembly; 231, the upper end face of the ball stud; 232, a blind hole special for a rotary tool on the upper end surface of the ball stud; and 24, connecting rods in the assembly.
Description of the embodiments
The technical scheme of the application of the present invention is further described below with reference to the accompanying drawings:
as shown in figure 1, the invention can achieve the aim of switching the micro-dynamic pedicle screw used in the dynamic fixing system into the universal screw used in the rigid fixing system by using only one cushion block 1 with a simple structure and a cylindrical main body, wherein the main characteristic is the height H of the cushion block; the effect of the height H of the spacer can be seen from the working principle of analyzing the micro-dynamic nail as follows.
Fig. 2 shows a schematic diagram of the operation of the micro-dynamic pedicle screw 2 used in combination with the spacer of the invention. As is clear from the figure, after the screw plug 21 is locked, the pressed connecting rod 24 is supported on the bottom 222 of the U-shaped groove of the nail seat 22 and keeps a gap Xd with the upper end surface 231 of the ball stud 23, so that the ball stud 23 can slightly swing around its own center of sphere, specifically about ±3 to 5 degrees, and slightly move in the axial direction of the ball stud in the cavity 223 of the nail seat 22, thereby exhibiting the characteristics and performance of a micro-dynamic stud.
Clinically, after a doctor implants a plurality of ball nails 23 assembled in the nail seat 22 into corresponding vertebral bodies, and before the connecting rod 24 and the screw plug 21 are placed, if a certain group of micro-dynamic nails are decided to be universal nails, only a special tool is needed to be used, so that the cushion block 1 shown in the application of the invention avoids the protruding obstacle 221 on the nail seat 22, is placed in the cavity 223, is placed on the upper end surface 231 of the ball nails 23, and then is placed in the connecting rod 24 and locks the screw plug 21. In this state, as shown in fig. 3, the connecting rod 24 is no longer supported by the bottom 222 of the U-shaped groove in the nail seat and generates a gap Xg with it, by the height H of the pad 1; the connecting rod 24 is directly supported by the cushion block 1, the cushion block 1 further presses against the ball stud 23, so that the ball stud 23 can not swing around the self sphere center, and therefore, the ball stud 23 together with the implanted vertebral body can not swing relatively to the connecting rod 24 and the stud base 22, namely the cushion block 1 shown in the application of the invention can switch the matched micro-state stud into the working principle of the universal stud, and the technical scheme shown in the application of the invention is also provided.
In combination with the effect diagram of the micro-dynamic nail of fig. 4, it can be clearly seen that the working principle of the micro-dynamic nail in the dynamic fixing system is as follows: the upper end 231 of the ball stud is lower than the bottom 222 of the U-shaped groove in the stud base, and when the plug 21 is locked, the connecting rod 24 is supported on the bottom 222 of the U-shaped groove in the stud base, so that the gap Xd exists between the connecting rod 24 and the ball stud 23, and the ball stud 23 can slightly move and swing in the stud base 22, which is the characteristic and advantage of the micro-dynamic stud.
Then, in combination with fig. 5, the switching action of the pad 1 according to the present invention can be seen: after the cushion block 1 is placed, the connecting rod 24 is pressed by the locked screw plug 21 and supported by the cushion block 1, and the cushion block 1 presses the ball stud 23, so that the ball stud 23 can not swing any more. In this way, the cushion block 1 disclosed in the application of the invention completes the process of converting the micro-dynamic nails of the matched dynamic fixing system into the universal nails of the fixed fusion system.
As can be seen from the technical solutions of the present invention disclosed in fig. 2 and 3, and fig. 4 and 5, for switching the micro-state nail to the universal nail, the switching is reversible. For example, a clinical operator can make different "mashup" selections at any time according to the needs of the surgery, namely: as long as the cushion block 1 disclosed by the application is firstly put into the universal nail before the connecting rod 24 is put into the universal nail, the universal nail has the function of rigid fixation in clinic, otherwise, the universal nail is a micro-dynamic nail, and the universal nail has the function of dynamic fixation; the cushion block 1 shown in the application can be taken out from the inner cavity 223 of the nail seat by using a special tool when the cushion block 1 is adjusted according to clinical needs, so that the universal nail which is rigidly fixed can be restored into the micro-dynamic nail to play a role of dynamic fixation;
the simple reversible switching can be performed at any time, the clinical operation is greatly facilitated, the selectivity of each clinical period is increased, the shown micro-state nails are enabled to be used only by matching with the cushion block 1 disclosed by the invention, the dual-purpose of one nail can be realized, the stock and the stock are simplified, and the operating cost is saved.
In the micro-state nail 2 shown in fig. 2 and 4, the clearance Xd between the connecting rod 24 and the upper end surface 231 of the ball stud is about 0.5mm; the cylindrical height H of the pad 1 shown in the present application is a main technical feature of the present application, and in the first embodiment of the present application, h=1mm is set; as can be seen from fig. 3 and 5, the clearance Xg between the connecting rod 24 and the bottom 222 of the U-shaped groove in the nail seat is also about 0.5mm; so that the connecting rod 24 can avoid the bottom of the U-shaped groove in the nail seat and directly press the ball stud 22, thereby limiting the swing and the movement of the ball stud 22 and realizing rigid fixation.
As for other technical features of the pad 1 according to the present invention, for example; the diameter D of the cushion block is slightly smaller than the inner cavity 223 of the nail seat, and is convenient for placement and removal; the notch 13 on the cushion block is in order to avoid the protruding obstacle 221 in the nail seat; the protrusion 14 at the lower part of the cushion block is convenient to be matched with the special blind hole 232 of the rotary tool on the upper end surface of the ball stud; the clamping holes 15 on the cushion block are used for facilitating the clamping of a special tool; the technical characteristics can be modified according to the specific sizes of different micro-state nails matched with the micro-state nails and the habit preference of operators.
Claims (4)
1. The utility model provides a can produce spacer of switching function, is the external member that the expanded function of the fine motion attitude pedicle screw that specially coordinates belongs to among the bone surgery apparatus was used, its characterized in that: the cushion block is a cylinder, the height of the cylinder is larger than the distance from the bottom of the U-shaped opening groove on the nail seat of the matched micro-motion pedicle screw to the upper end face of the ball head screw, and the diameter of the cylinder-shaped cushion block is slightly smaller than the diameter of the cavity in the nail seat of the matched micro-motion pedicle screw; the cushion block is an independent body, and the purpose of converting the micro-dynamic pedicle screw into the universal pedicle screw in the rigid fixing system can be realized only by embedding the micro-dynamic pedicle screw matched with the cushion block, so that whether the pedicle screw is embedded or not can be selected at any time clinically, and the pedicle screw has reversibility.
2. A pad capable of producing a switching function as claimed in claim 1, wherein: the cushion block of the cylinder is provided with a notch for avoiding interference with a protruding obstacle on a cavity in the matched nail seat.
3. A pad capable of producing a switching function as claimed in claim 1, wherein: the lower part of the cushion block is provided with a protrusion which is matched with a blind hole special for a screwdriver set on the upper end face of a ball head nail of the matched micro pedicle screw.
4. A pad capable of producing a switching function as claimed in claim 1, wherein: the upper part of the cylinder is provided with a tool clamping interface which is convenient for placing or taking out the cushion block into or from the cavity of the nail seat by using a special tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810108828.7A CN108186093B (en) | 2018-01-25 | 2018-01-25 | Cushion block capable of generating switching function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810108828.7A CN108186093B (en) | 2018-01-25 | 2018-01-25 | Cushion block capable of generating switching function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108186093A CN108186093A (en) | 2018-06-22 |
| CN108186093B true CN108186093B (en) | 2024-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810108828.7A Active CN108186093B (en) | 2018-01-25 | 2018-01-25 | Cushion block capable of generating switching function |
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| Country | Link |
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| CN (1) | CN108186093B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220287740A1 (en) * | 2020-04-03 | 2022-09-15 | Xieping DONG | Pedicle screw-rod system capable of gradually changing from rigid fixation to non-rigid fixation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007122494A2 (en) * | 2006-04-21 | 2007-11-01 | Precimed, S.A. | Dynamic intervertebral stabilization system |
| CN105534584A (en) * | 2015-12-31 | 2016-05-04 | 曾析非 | Micro dynamic pedicle screw |
| CN105596071A (en) * | 2015-12-31 | 2016-05-25 | 何静 | Dual-functional pedicle screw |
| CN205433863U (en) * | 2015-12-31 | 2016-08-10 | 何静 | Universal fixed, little dynamic dual -purpose pedicle screw |
| CN211674500U (en) * | 2018-01-25 | 2020-10-16 | 何伟义 | Cushion block capable of generating switching function |
-
2018
- 2018-01-25 CN CN201810108828.7A patent/CN108186093B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007122494A2 (en) * | 2006-04-21 | 2007-11-01 | Precimed, S.A. | Dynamic intervertebral stabilization system |
| CN105534584A (en) * | 2015-12-31 | 2016-05-04 | 曾析非 | Micro dynamic pedicle screw |
| CN105596071A (en) * | 2015-12-31 | 2016-05-25 | 何静 | Dual-functional pedicle screw |
| CN205433863U (en) * | 2015-12-31 | 2016-08-10 | 何静 | Universal fixed, little dynamic dual -purpose pedicle screw |
| CN211674500U (en) * | 2018-01-25 | 2020-10-16 | 何伟义 | Cushion block capable of generating switching function |
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| Publication number | Publication date |
|---|---|
| CN108186093A (en) | 2018-06-22 |
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