CN109009379B - Micro-motion fracture internal fixation system and micro-motion screw for fracture used by same - Google Patents
Micro-motion fracture internal fixation system and micro-motion screw for fracture used by same Download PDFInfo
- Publication number
- CN109009379B CN109009379B CN201810964431.8A CN201810964431A CN109009379B CN 109009379 B CN109009379 B CN 109009379B CN 201810964431 A CN201810964431 A CN 201810964431A CN 109009379 B CN109009379 B CN 109009379B
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- Prior art keywords
- fracture
- micro
- connecting plate
- motion
- overlapping part
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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
-
- 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
Abstract
The invention discloses a micro-motion fracture internal fixation system and micro-motion screws for fracture, wherein the micro-motion fracture internal fixation system comprises a first connecting plate, a second connecting plate and a micro-motion screw set, wherein the micro-motion screw set is used for connecting a first overlapping part and a second overlapping part, and enables a certain degree of freedom to be provided between the first connecting plate and the second connecting plate at least in the long axis direction of bones, so that healing of two fracture ends is promoted, the first connecting plate is used for connecting the first fracture end, and the right end part of the first connecting plate is provided with the first overlapping part; the second connecting plate is used for connecting the second fracture end, and the left end part of the second connecting plate is provided with a second overlapping part which can be overlapped with the first overlapping part. The invention can at least generate micro motion with a certain range and a certain frequency in the long axis direction of the bone, thereby realizing micro motion effect, accelerating fracture healing, effectively shortening treatment period, accelerating recovery of diseases of patients, bringing good medical treatment effect and reducing diagnosis and treatment cost.
Description
Technical Field
The invention relates to a micro-motion fracture internal fixation system and a micro-motion screw for fracture.
Background
At present, in fracture surgery, the modes of conservative treatment, internal fixation of a steel plate, external fixation of a bracket and the like are conventionally selected, but the still-used theory is the old AO theory, namely the strong internal fixation theory. This theory ignores the biomechanical effect, thus leading to the increase of the probability of slow fracture healing and even bone disunion, the recent fear of load and the possibility of fracture of the steel plate caused by the increase of long-term fatigue of the steel plate, so that the old nail plate internal fixation system has a great number of defects.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a micro-motion fracture internal fixation system which can at least generate micro-motion with a certain range and a certain frequency in the long axis direction of bones, thereby realizing micro-motion effect, accelerating fracture healing, effectively shortening treatment period, accelerating recovery of diseases of patients, bringing good medical treatment effect and reducing diagnosis and treatment cost.
In order to solve the technical problems, the technical scheme of the invention is as follows: an internal fixation system for micro-motion fracture, which is used for connecting and fixing two fracture ends, wherein the two fracture ends are a first fracture end and a second fracture end respectively, and comprises:
the first connecting plate is used for connecting the first fracture end, and the right end part of the first connecting plate is provided with a first overlapping part;
the second connecting plate is used for connecting the second fracture end, and the left end part of the second connecting plate is provided with a second overlapping part which can be overlapped with the first overlapping part; wherein, the left-right direction is the long axis direction of the bone;
and the micro-screw group is used for connecting the first overlapping part and the second overlapping part, and enables a certain degree of freedom of movement to be provided between the first connecting plate and the second connecting plate at least in the long axis direction of the bone, so that healing of two fracture ends is promoted.
There is further provided a connection structure of a first connection plate with a first fracture end, the first connection plate being connected with the first fracture end by at least one fracture screw.
Further provided is a connection structure of a second connection plate and a second fracture end, wherein the second connection plate is connected with the second fracture end through at least one fracture screw.
The special structure of the micro-screw set is further provided so as to achieve the aim of enabling the first connecting plate and the second connecting plate to have a certain degree of freedom of movement at least in the long axis direction of the bone, the micro-screw set comprises a special screw, a baffle and a special nut, the baffle is installed in the special nut, an installation cavity is formed between the baffle and the special nut, the special nut is connected to any one of the first overlapping part and the second overlapping part, the special screw is connected to the rest one of the first overlapping part and the second overlapping part, the pin head of the special screw is installed in the installation cavity, and the installation cavity and the pin head cooperate to enable the special screw to have a certain degree of freedom of movement at least in the long axis direction of the bone relative to the special nut.
Further, in order to enable the special nut to be well connected with the second overlapping part, a thread engaging part for connection is arranged on the outer wall of the special nut.
Further, the second overlapping portion is located above the first overlapping portion, the second overlapping portion is connected with the special nut, and the first overlapping portion is connected with the special screw.
Further, the mounting cavity is provided with a spherical cavity and a kidney-shaped hole positioned below the spherical cavity, the nail head is provided with a ball head and a column body positioned below the ball head and having a kidney-shaped cross section, the ball head is matched in the spherical cavity, the column body is matched in the kidney-shaped hole, the long axis direction of the kidney-shaped hole is arranged along the long axis direction of the bone, the long axis length of the kidney-shaped hole is larger than the long axis length of the column body, and the wall surface in the short axis direction of the kidney-shaped hole is propped against the corresponding wall surface in the short axis direction of the column body.
Further, the micro-screw group enables the first connecting plate and the second connecting plate to have a certain degree of freedom of movement only in the long axis direction of the bone; the degrees of freedom of movement include relative movement in the direction of the long axis of the bone and/or relative oscillation in the direction of the long axis of the bone.
Further, two opposite surfaces of the first overlapping portion and the second overlapping portion are polished surfaces.
The invention also provides a micro-screw for fracture, which is a micro-screw group used in the micro-fracture internal fixation system.
After the technical scheme is adopted, the first fracture end is connected through the first connecting plate, the second fracture end is connected through the second connecting plate, then the first overlapping part and the second overlapping part which are overlapped together are connected through the micro-motion screw group, the micro-motion screw group can enable the first connecting plate and the second connecting plate to have a certain movable degree of freedom at least in the long axis direction of bones, the movable degree of freedom can move or swing in the direction, along with the movement of peripheral muscles of the first connecting plate and the second connecting plate after the reduction of the fracture, the micro-motion fracture internal fixing system is caused to generate micro-motion with a certain range and a certain frequency in the vertical direction (namely, in the direction parallel to the long axis direction of the bones, namely, in the left-right direction) of the screw screwing, and the micro-motion effect is achieved in the reasonable range and the frequency layer, so that the healing of the fracture is quickened, the treatment period is effectively shortened, the recovery of the diseases of patients is quickened, good medical treatment effect is brought, and the overall diagnosis and treatment cost is reduced.
Drawings
FIG. 1 is a view showing the state of use of the micro-motion fracture internal fixation system of the present invention;
FIG. 2 is a schematic view of the structure of the micro-screw for fracture of the present invention;
fig. 3 is a schematic view of the connection of the kidney-shaped hole and the column body.
Detailed Description
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
As shown in fig. 1, 2 and 3, a micro-motion type fracture internal fixation system for connecting and fixing two fracture ends, a first fracture end 10 and a second fracture end 20, respectively, comprises:
a first connecting plate 1, wherein the first connecting plate 1 is used for connecting the first fracture end 10, and the right end part of the first connecting plate 1 is provided with a first overlapping part 11;
a second connecting plate 2, wherein the second connecting plate 2 is used for connecting the second fracture end 20, and the left end part of the second connecting plate 2 is provided with a second overlapping part 21 which can be overlapped with the first overlapping part 11; wherein, the left-right direction is the long axis direction of the bone;
and the micro screw group is used for connecting the first superposition part 11 and the second superposition part 21, and has a certain freedom of movement between the first connecting plate 1 and the second connecting plate 2 at least in the long axis direction of the bone, so as to promote the healing of two fracture ends.
As shown in fig. 1, the first connecting plate 1 is connected with the first fracture end 10 through at least one fracture screw 3; specifically, in the present embodiment, there are provided 1 fracture screws 3 which are screwed on the first connection plate 1 and the first fracture end 10 by the fracture screws 3 in the up-down direction, thereby achieving connection of the first connection plate 1 and the first fracture end 10, but the number of the fracture screws 3 is not limited thereto.
As shown in fig. 1, the second connecting plate 2 is connected to the second fracture end 20 by at least one fracture screw 3; specifically, in the present embodiment, there are provided 1 fracture screws 3 which are screwed on the second connecting plate 2 and the second fracture end 20 by the fracture screws 3 in the up-down direction, thereby achieving the connection of the second connecting plate 2 and the second fracture end 20, but the number of the fracture screws 3 is not limited thereto.
Specifically, as shown in fig. 2 and 3, the set of micro screws of the present embodiment may have the following structure: the micro-screw set comprises a special screw 41, a baffle 42 and a special nut 43, wherein the baffle 42 is arranged in the special nut 43, a mounting cavity is formed between the baffle 42 and the special nut 43, the special nut 43 is connected to any one of the first overlapping part 11 and the second overlapping part 21, the special screw 41 is connected to the rest one of the first overlapping part 11 and the second overlapping part 21, the nail head of the special screw 41 is arranged in the mounting cavity, and the matching of the mounting cavity and the nail head enables the special screw 41 to have a certain degree of freedom of movement relative to the special nut 43 at least in the long axis direction of a bone; specifically, the mounting cavity has a spherical cavity 30 and a kidney-shaped hole 40 located below the spherical cavity 30, the pin head has a ball head 60 and a column 50 located below the ball head 60 and having a kidney-shaped cross section, the ball head 60 is fitted in the spherical cavity 30, the column 50 is fitted in the kidney-shaped hole 40, and the long axis direction of the kidney-shaped hole 40 is set along the long axis direction of the bone, the long axis length of the kidney-shaped hole 40 is longer than the long axis length of the column 50, and the wall surface forming the short axis direction of the kidney-shaped hole 40 is abutted against the corresponding wall surface of the column 50 in the short axis direction; thus, a certain degree of freedom of movement can be provided between the first connecting plate 1 and the second connecting plate 2 only in the direction of the long axis of the bone; the degrees of freedom of movement include relative movement in the long axis direction of the bone and/or relative oscillation in the long axis direction of the bone; however, the jogging between the first connecting plate 1 and the second connecting plate 2 is not limited to having a certain degree of freedom of movement in the long axis direction of the bone.
As shown in fig. 2, the outer wall of the special nut 43 is provided with a threaded engagement portion for connection, which is used to facilitate connection with the second overlapping portion 21 of the connection member.
As shown in fig. 2, the second overlapping portion 21 is located above the first overlapping portion 11, the second overlapping portion 21 is connected to the special nut 43, and the first overlapping portion 11 is connected to the special screw 41.
The two opposite surfaces of the first overlapping part and the second overlapping part are polished surfaces.
The working principle of the invention is as follows:
the invention connects the first fracture end 10 through the first connecting plate 1, connects the second fracture end 20 through the second connecting plate 2, then connects the first overlapping part 11 and the second overlapping part 21 overlapped together through the micro-motion screw group, the micro-motion screw group can make the first connecting plate 1 and the second connecting plate 2 have a certain freedom degree in the long axis direction of the bone, the freedom degree of movement can be movement or swinging in the direction, along with the movement of the peripheral muscles of the first connecting plate 1 and the second connecting plate 2 after the fracture is reset, the micro-motion fracture internal fixation system is caused to generate micro-motion with a certain range and a certain frequency in the vertical direction (namely, the direction parallel to the long axis direction of the bone, namely, the left and right directions) of the screw, and the micro-motion effect is realized through the micro-motion completed in a reasonable range and frequency level, thereby realizing the micro-motion effect to accelerate the fracture healing, effectively shortening the treatment period, accelerating the recovery of the disease of the patient, bringing good medical treatment effect and reducing the overall diagnosis and treatment cost.
The technical problems, technical solutions and advantageous effects solved by the present invention have been further described in detail in the above-described embodiments, and it should be understood that the above-described embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the scope of protection of the present invention.
Claims (6)
1. An internal fixation system for micro-fracture, for the connection fixation between two fracture ends, a first fracture end (10) and a second fracture end (20), respectively, characterized in that it comprises:
the first connecting plate (1), the first connecting plate (1) is used for connecting the first fracture end (10), and the right end part of the first connecting plate (1) is provided with a first overlapping part (11);
a second connecting plate (2), wherein the second connecting plate (2) is used for connecting the second fracture end (20), and the left end part of the second connecting plate (2) is provided with a second overlapping part (21) which can be overlapped with the first overlapping part (11); wherein, the left-right direction is the long axis direction of the bone;
the micro-screw set is used for connecting the first overlapping part (11) and the second overlapping part (21) and enabling a certain degree of freedom of movement to be provided between the first connecting plate (1) and the second connecting plate (2) at least in the long axis direction of the bone so as to promote healing of two fracture ends;
the micro-motion screw set comprises a special screw (41), a baffle (42) and a special nut (43), wherein the baffle (42) is arranged in the special nut (43), a mounting cavity is formed between the baffle (42) and the special nut (43), a nail head of the special screw (41) is arranged in the mounting cavity, and the matching of the mounting cavity and the nail head enables the special screw (41) to have a certain degree of freedom of movement relative to the special nut (43) at least in the long axis direction of a bone; the second overlapping part (21) is positioned above the first overlapping part (11), the second overlapping part (21) is connected with the special nut (43), and the first overlapping part (11) is connected with the special screw (41);
the mounting cavity is provided with a spherical cavity (30) and a kidney-shaped hole (40) positioned below the spherical cavity (30), the nail head is provided with a ball head (60) and a column body (50) positioned below the ball head (60) and having a kidney-shaped cross section, the ball head (60) is matched in the spherical cavity (30), the column body (50) is matched in the kidney-shaped hole (40), the long axis direction of the kidney-shaped hole (40) is arranged along the long axis direction of the bone, the long axis length of the kidney-shaped hole (40) is larger than the long axis length of the column body (50), and the wall surface in the short axis direction of the kidney-shaped hole (40) is propped against the corresponding wall surface in the short axis direction of the column body (50);
the micro-screw group enables a certain degree of freedom of movement between the first connecting plate (1) and the second connecting plate (2) only in the long axis direction of the bone; the degrees of freedom of movement include relative movement in the direction of the long axis of the bone and/or relative oscillation in the direction of the long axis of the bone.
2. The micro-motion fracture internal fixation system of claim 1, wherein: the first connecting plate (1) is connected to the first fracture end (10) by means of at least one fracture screw (3).
3. The micro-motion fracture internal fixation system of claim 1, wherein: the second connecting plate (2) is connected with the second fracture end (20) through at least one fracture screw (3).
4. The micro-motion fracture internal fixation system of claim 1, wherein: the outer wall of the special nut (43) is provided with a thread engaging part for connection.
5. The micro-motion fracture internal fixation system of claim 1, wherein: the two opposite surfaces of the first overlapping part (11) and the second overlapping part (21) are polished surfaces.
6. A set of micro-screws for bone fracture, characterized in that it is a set of micro-screws for use in a micro-fracture internal fixation system according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810964431.8A CN109009379B (en) | 2018-08-23 | 2018-08-23 | Micro-motion fracture internal fixation system and micro-motion screw for fracture used by same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810964431.8A CN109009379B (en) | 2018-08-23 | 2018-08-23 | Micro-motion fracture internal fixation system and micro-motion screw for fracture used by same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109009379A CN109009379A (en) | 2018-12-18 |
| CN109009379B true CN109009379B (en) | 2023-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810964431.8A Active CN109009379B (en) | 2018-08-23 | 2018-08-23 | Micro-motion fracture internal fixation system and micro-motion screw for fracture used by same |
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| CN102551857A (en) * | 2012-02-07 | 2012-07-11 | 陈远明 | Universal vertebral pedicle screw system capable of moving slightly |
| CN202477832U (en) * | 2012-04-01 | 2012-10-10 | 王兆年 | In vivo/in vitro bone compressing fixer |
| CN102883673A (en) * | 2010-03-08 | 2013-01-16 | 迈阿密设备解决方案有限责任公司 | Locking element for a polyaxial bone anchor, bone plate assembly and tool |
| CN103635155A (en) * | 2011-06-17 | 2014-03-12 | 迈阿密设备解决方案有限责任公司 | Modular bone plate and member of such a modular bone plate |
| CN209203472U (en) * | 2018-08-23 | 2019-08-06 | 厉晓龙 | Inching Fracture internal fixaiion system and its fracture micrometer screw used |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9814502B2 (en) * | 2014-08-21 | 2017-11-14 | Theodore I Malinin | Bone plate and method of use |
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2018
- 2018-08-23 CN CN201810964431.8A patent/CN109009379B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102883673A (en) * | 2010-03-08 | 2013-01-16 | 迈阿密设备解决方案有限责任公司 | Locking element for a polyaxial bone anchor, bone plate assembly and tool |
| CN103635155A (en) * | 2011-06-17 | 2014-03-12 | 迈阿密设备解决方案有限责任公司 | Modular bone plate and member of such a modular bone plate |
| CN102551857A (en) * | 2012-02-07 | 2012-07-11 | 陈远明 | Universal vertebral pedicle screw system capable of moving slightly |
| CN202477832U (en) * | 2012-04-01 | 2012-10-10 | 王兆年 | In vivo/in vitro bone compressing fixer |
| CN209203472U (en) * | 2018-08-23 | 2019-08-06 | 厉晓龙 | Inching Fracture internal fixaiion system and its fracture micrometer screw used |
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| Publication number | Publication date |
|---|---|
| CN109009379A (en) | 2018-12-18 |
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Effective date of registration: 20200728 Address after: 213000 No. 2 Yongning North Road, Changzhou City, Jiangsu Province Applicant after: CHANGZHOU WUJIN PEOPLE'S Hospital Address before: 213000 Room 802, Unit C, 7 Yikang Gardens, Tianning District, Changzhou City, Jiangsu Province Applicant before: Li Xiaolong |
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