CN115192165A - Compression device and internal fixation device for fracture reduction - Google Patents
Compression device and internal fixation device for fracture reduction Download PDFInfo
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- CN115192165A CN115192165A CN202210659964.1A CN202210659964A CN115192165A CN 115192165 A CN115192165 A CN 115192165A CN 202210659964 A CN202210659964 A CN 202210659964A CN 115192165 A CN115192165 A CN 115192165A
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- implant
- pressurizing
- fracture
- appliance
- internal fixation
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- 230000009467 reduction Effects 0.000 title claims abstract description 17
- 238000007906 compression Methods 0.000 title claims description 21
- 230000006835 compression Effects 0.000 title claims description 19
- 239000007943 implant Substances 0.000 claims abstract description 133
- 230000008878 coupling Effects 0.000 claims abstract description 8
- 238000010168 coupling process Methods 0.000 claims abstract description 8
- 238000005859 coupling reaction Methods 0.000 claims abstract description 8
- 208000010392 Bone Fractures Diseases 0.000 claims description 50
- 206010017076 Fracture Diseases 0.000 description 39
- 210000000988 bone and bone Anatomy 0.000 description 16
- 208000001132 Osteoporosis Diseases 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 206010053206 Fracture displacement Diseases 0.000 description 1
- 208000002658 Intra-Articular Fractures Diseases 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 229910001362 Ta alloys Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 230000001054 cortical effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
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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
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/808—Instruments for holding or positioning bone plates, or for adjusting screw-to-plate locking mechanisms
-
- 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
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
The invention discloses a pressurizing appliance and a fracture reduction internal fixation device, wherein the pressurizing appliance comprises a first implant and a second implant, the first implant is provided with a connecting hole, the connecting hole is provided with an internal thread, and the outer side of the first implant is provided with an external thread; the second implant is adapted to be threadedly coupled to an inner wall of the coupling bore. In the pressurization utensil, fracture piece is implanted respectively from both sides to first implant and second implant, through the threaded connection between first implant and the second implant, realizes the pressurization to the fracture piece, and threaded connection between first implant and the second implant is firm, can avoid appearing the unstable condition of pressurization. The invention can be widely applied to the technical field of medical instruments.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a pressurizing device and a fracture reduction internal fixing device.
Background
Tension screws are a common internal fixation implant in fracture reduction internal fixation surgery, and particularly in the treatment of some metaphyseal intra-articular fractures, tension screws or tension screws are combined with bone fracture plates to pressurize and firmly fix fracture blocks. The principle is that the far-end thread of a lag screw is meshed with cancellous bone in a fracture block, the near end of the lag screw is not provided with threads, and axial compression stress is formed between a screw head or a gasket or a bone fracture plate and cortical bone, so that compression is formed between the fracture blocks, and the compression and fixation of the fracture blocks are realized.
The realization of the technology must rely on the occlusion of the thread of the lag screw and cancellous bone, and the thread is continuously rotated during the process of forming the pressurizing force so as to destroy the bone of the nail way. When the screw thread damages the bone in the nail passage to the extent that the screw thread is not enough to support the action of the pressurizing force, the screw thread slipping phenomenon can occur, so that the pressurizing force and the extraction force of the lag screw to the fracture block are sharply reduced; secondly, once the screw is over-screwed, the screw can only be replaced by another position or replaced by a larger-diameter screw in the original screw channel for remediation, and under the condition that the position of the local screw is limited, the expected effect of fixation is seriously influenced, and the postoperative rehabilitation of a patient is influenced.
Therefore, there is a limit to the compressive force that a lag screw can provide under different bone conditions, and once the screw is over-torqued, it is difficult to remedy. Especially for patients with osteoporosis, it is difficult for the conventional lag screw to provide an effective compressive force, which adversely affects the treatment of fracture in patients with osteoporosis.
Disclosure of Invention
In order to solve at least one of the above technical problems, the present invention provides a compression device and an internal fixation device for fracture reduction, which adopt the following technical solutions.
The internal fixation device for fracture reduction provided by the invention comprises a pressurizing tool and a kirschner wire.
The internal fixation device for fracture reduction provided by the invention comprises a pressurizing device and a bone fracture plate.
In some embodiments of the invention, the internal fixation device for fracture reduction comprises a kirschner wire.
The pressurizing device provided by the invention comprises a first implant and a second implant, wherein the first implant is provided with a connecting hole, the connecting hole is provided with an internal thread, and the outer side of the first implant is provided with an external thread; the second implant is used for being in threaded connection with the inner wall of the connecting hole.
In some embodiments of the invention, the internal threads of the first implant are in a direction opposite to the external threads.
In some embodiments of the invention, the first implant has an internal thread pitch that is less than the external thread pitch.
In some embodiments of the invention, the first implant has an internal thread with a depth less than a depth of an external thread.
In some embodiments of the invention, the connection hole extends through the first implant in an axial direction of the first implant.
In some embodiments of the invention, the second implant is provided with a hollow guide channel extending through the second implant in an axial direction of the second implant.
In some embodiments of the invention, the first end of the second implant is threadedly coupled to the first implant, and the second end of the second implant is flanked by a second annular compression portion.
The embodiment of the invention has at least the following beneficial effects: in the pressurizing appliance, the first implant and the second implant are respectively implanted into the fracture block from two sides, the fracture block is pressurized through the threaded connection between the first implant and the second implant, the threaded connection between the first implant and the second implant is firm, and the unstable pressurizing condition can be avoided. The invention can be widely applied to the technical field of medical appliances.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings.
FIG. 1 is a schematic view of a threaded connection of a first implant and a second implant at a fracture site.
Fig. 2 is a cross-sectional view of a first implant.
Fig. 3 is a cross-sectional view of a second implant.
Reference numerals are as follows: 100. a first implant; 101. connecting holes; 200. a second implant; 201. a guide channel; 202. and a second annular pressurization part.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that if the terms "center", "middle", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., are used in an orientation or positional relationship indicated based on the drawings, it is merely for convenience of description and simplicity of description, and it is not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore, is not to be considered as limiting the present invention. The features defined as "first" and "second" are used for distinguishing feature names rather than having special meanings, and further, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention relates to a compression device, which comprises a first implant 100 and a second implant 200, wherein the first implant 100 and the second implant 200 are connected and locked to generate compression action between fracture blocks. Specifically, the first implant 100 is threadedly coupled to the second implant 200, and it is understood that the first implant 100 is provided with a coupling hole 101, the coupling hole 101 is provided with an internal thread, and the second implant 200 is threadedly coupled to an inner wall of the coupling hole 101.
Referring to the drawings, the outer side of the first implant 100 is provided with external threads so that the first implant 100 is implanted into a fracture from one side, and the external threads of the first implant 100 serve to anchor cancellous bone. Further, the pitch of the external thread of the first implant 100 is greater than that of the internal thread, so as to better anchor cancellous bone. In some examples, the depth of the external threads of first implant 100 is greater than the depth of the internal threads to anchor bone.
In the related art, the compression using the lag screw is successfully performed depending on the bone conditions, and in the case of osteoporosis, the thread of the lag screw cannot anchor a sufficient amount of cancellous bone, and thus it is difficult to provide a sufficient inter-fracture compression force. In contrast, the pressurizing tool according to the present invention can achieve a good pressurizing effect even when the first implant 100 can be fixed under a bone condition, and the pressurizing tool can pressurize the first implant 100 and the second implant 200 by the screw connection without depending on the bone condition, thereby improving the pressurizing stability. In addition, if the common tension screw is over-screwed, the damage of the nail channel can be remedied by implanting the pressurizing device designed by the invention in situ.
Further, a coupling hole 101 is formed through the first implant 100 in the axial direction of the first implant 100 to form a hollow cylindrical structure so that the first implant 100 is guided to be implanted into a fracture by a kirschner wire. Referring to the drawings, one end of the first implant 100 is provided with a counter bore, and specifically, the first end of the first implant 100 is used for connecting with the second implant 200, and the second end of the first implant 100 is provided with a counter bore, which is a hexagon socket, so that the first implant 100 can be conveniently screwed when being implanted. Of course, the counter bores can alternatively be designed as other bores which facilitate the drive.
It will be appreciated that the second implant 200 is implanted into the fracture block from the contralateral side, and the end of the second implant 200 is inserted into the coupling hole 101 of the first implant 100 and screwed tight, thereby achieving compression of the fracture block. Specifically, the first end of the second implant 200 is provided with an external thread, and considering that the pitch of the internal thread of the connecting hole 101 is small, the threaded connection between the second implant 200 and the first implant 100 is a low-pitch threaded connection mode, so that the compression process is slow and controllable, and a doctor can apply appropriate compression force to a fracture block by screwing in an appropriate depth according to the requirement of fracture fixation, thereby avoiding over-screwing and avoiding fracture displacement caused by over-compression.
Referring to the drawings, the second implant 200 is provided with a hollow guide passage 201, and the guide passage 201 penetrates the second implant 200 in the axial direction of the second implant 200 to form a hollow cylindrical structure, so that the second implant 200 is guided to be implanted into a fracture block by a kirschner wire.
Further, one end of the second implant 200 is provided with a counter bore, specifically, a first end of the second implant 200 is used for connecting with the first implant 100, and a second end of the second implant 200 is provided with a counter bore, which is a hexagon socket, so that the second implant 200 can be conveniently screwed when being implanted. Of course, the counter bores can alternatively be designed as other bores which facilitate the drive.
The second end of the second implant 200 is flanked by a second annular compression portion 202, and the second annular compression portion 202 is convexly positioned on the side of the second implant 200 to apply pressure to the fracture fragment. With reference to the drawings, the surface of the second annular pressing portion 202 is processed in an arc shape to form a fillet structure, so that the fracture block is prevented from being worn.
In some examples, further, the second end of the first implant 100 is provided at a side with a first annular compression portion that is protrudingly provided at a side of the first implant 100 to apply pressure to the fracture block.
After the second implant 200 is threaded into the first implant 100, the internal threads of the first implant 100 are further configured to be opposite to the external threads in order to prevent the first implant 100 from being unscrewed during continued rotation of the threaded second implant 200, it being understood that one is configured to be left-handed and the other is configured to be right-handed.
The first implant 100 is screwed into the bone in the counterclockwise direction, and the second implant 200 is screwed with the inner wall of the coupling hole 101 of the first implant 100 in the clockwise direction, it can be understood that when the second implant 200 is rotated clockwise, the first implant 100 can be prevented from being unscrewed, and the first implant 100 can be prevented from being unscrewed during the screw insertion process.
It is understood that the first implant 100 and the second implant 200 are made of materials that meet national standards for orthopedic implants, and are made of steel, titanium alloy, tantalum metal, tantalum alloy, or polyetheretherketone.
The invention relates to a fracture reduction internal fixation device, which comprises a pressurizing device and a kirschner wire, wherein the kirschner wire has the function of guiding implantation on a first implant 100 and a second implant 200.
Take the lateral tibial plateau cleavage fracture as an example: after the fracture is reduced, a kirschner wire is placed in a fracture block on the inner side of a tibial plateau and tapping is carried out on bone, and the first implant 100 is implanted into the inner side in a counterclockwise mode through the guidance of the kirschner wire; placing a kirschner wire outside the fracture, and using the kirschner wire to guide and implant a second implant 200; second implant 200 is threadably connected to first implant 100.
It will be appreciated that as the second implant 200 is screwed in, the combined length of the first implant 100 and the second implant 200 gradually shortens, gradually moving the fracture block toward the tibial plateau body and exerting sufficient pressure to achieve compression between the fracture blocks.
Of course, the first implant 100 and the second implant 200 can be used by changing the positions according to the specific condition of the fracture, and the compression effect of the internal fixation of the fracture reduction is not influenced.
The invention relates to a fracture reduction internal fixation device, which comprises a pressurizing device and a bone fracture plate, wherein the bone fracture plate is arranged as a steel plate, and the bone fracture plate can simultaneously have the functions of transverse pressurization and angle stabilization by utilizing the pressurizing device, so that the application range of the traditional locking steel plate internal fixation system is greatly expanded.
Specifically, the bone plate is provided with a threaded hole, the second implant 200 penetrates through the threaded hole, and the second end of the second implant 200 is in threaded connection with the inner wall of the threaded hole. It will be appreciated that the second end of second implant 200 is externally threaded, or second annular pressurization portion 202 of the second end of second implant 200 is externally threaded.
Further, the fracture reduction internal fixation device includes a kirschner wire, which has an implant guiding function for the first implant 100 and the second implant 200.
In the description of the present specification, reference to the terms "one embodiment," "some examples," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" or the like, if any, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
In the description of the present invention, the appearances of the patent names and phrases in the specification are not necessarily the same but are different. For example, the patent names "a and B" indicate that the claimed content of the invention is: the subject name is A and the subject name is B.
Claims (10)
1. A compression device, characterized by: comprises that
The implant comprises a first implant (100), wherein the first implant (100) is provided with a connecting hole (101), the connecting hole (101) is provided with an internal thread, and the outer side of the first implant (100) is provided with an external thread;
a second implant (200), the second implant (200) being adapted to be threadedly coupled to an inner wall of the coupling hole (101).
2. The pressurizing appliance of claim 1, wherein: the internal thread of the first implant (100) is opposite to the external thread.
3. A pressurizing appliance according to claim 1 or 2, wherein: the pitch of the internal thread of the first implant (100) is smaller than the pitch of the external thread.
4. The pressurizing appliance of claim 3, wherein: the depth of the internal thread of the first implant (100) is less than the depth of the external thread.
5. The pressurizing appliance of claim 1, wherein: the connection hole (101) penetrates the first implant (100) in the axial direction of the first implant (100).
6. The pressurizing appliance of claim 1, wherein: the second implant (200) is provided with a hollow guide channel (201), and the guide channel (201) penetrates through the second implant (200) along the axial direction of the second implant (200).
7. The pressurizing appliance of claim 1, wherein: the first end of the second implant (200) is in threaded connection with the first implant (100), and a second annular pressurization part (202) is arranged on the side surface of the second end of the second implant (200).
8. The utility model provides a fracture reduction internal fixation device which characterized in that: comprises that
The pressurizing appliance of any one of claims 1 to 7;
a kirschner wire.
9. The utility model provides a fracture reduction internal fixation device which characterized in that: comprises that
The pressurizing appliance of any one of claims 1 to 7;
a bone fracture plate.
10. The internal fixation device for fracture reduction according to claim 9, wherein: the fracture reduction internal fixation device comprises a kirschner wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210659964.1A CN115192165A (en) | 2022-06-13 | 2022-06-13 | Compression device and internal fixation device for fracture reduction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210659964.1A CN115192165A (en) | 2022-06-13 | 2022-06-13 | Compression device and internal fixation device for fracture reduction |
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| Publication Number | Publication Date |
|---|---|
| CN115192165A true CN115192165A (en) | 2022-10-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210659964.1A Pending CN115192165A (en) | 2022-06-13 | 2022-06-13 | Compression device and internal fixation device for fracture reduction |
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| Country | Link |
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| CN (1) | CN115192165A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102217972A (en) * | 2011-06-09 | 2011-10-19 | 徐达强 | Combined type pressurizing locking device applied on metrizable torque force for articulation fractures |
| WO2018021987A1 (en) * | 2016-07-28 | 2018-02-01 | Safali Selim | Permanent implant used in orthopedic surgical operations |
| CN207152642U (en) * | 2017-01-04 | 2018-03-30 | 南通市通州区人民医院 | A kind of combined type cancellous bone double thread forcing screw |
| CN108635031A (en) * | 2018-07-10 | 2018-10-12 | 河北医科大学第三医院 | A kind of fracture of tibial plateau pressurizer for capableing of self-retaining |
| CN209826938U (en) * | 2019-03-11 | 2019-12-24 | 天津市天津医院 | Bidirectional compression screw assembly |
-
2022
- 2022-06-13 CN CN202210659964.1A patent/CN115192165A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102217972A (en) * | 2011-06-09 | 2011-10-19 | 徐达强 | Combined type pressurizing locking device applied on metrizable torque force for articulation fractures |
| WO2018021987A1 (en) * | 2016-07-28 | 2018-02-01 | Safali Selim | Permanent implant used in orthopedic surgical operations |
| CN207152642U (en) * | 2017-01-04 | 2018-03-30 | 南通市通州区人民医院 | A kind of combined type cancellous bone double thread forcing screw |
| CN108635031A (en) * | 2018-07-10 | 2018-10-12 | 河北医科大学第三医院 | A kind of fracture of tibial plateau pressurizer for capableing of self-retaining |
| CN209826938U (en) * | 2019-03-11 | 2019-12-24 | 天津市天津医院 | Bidirectional compression screw assembly |
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