CN211131328U - Built-in electromagnetic remote control jaw bone stretching and forming distractor - Google Patents
Built-in electromagnetic remote control jaw bone stretching and forming distractor Download PDFInfo
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- CN211131328U CN211131328U CN201921859010.5U CN201921859010U CN211131328U CN 211131328 U CN211131328 U CN 211131328U CN 201921859010 U CN201921859010 U CN 201921859010U CN 211131328 U CN211131328 U CN 211131328U
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Abstract
The utility model provides a built-in electromagnetic remote control jaw leads and opens osteogenesis distractor, this distractor include that built-in leads and opens device and external remote control unit, built-in device that leads includes the screw rod, the screw rod is connected with drive control device, the last first fixed plate that is provided with of drive control device, be provided with the activity on the screw rod and lead and open the subassembly, the activity leads and opens the subassembly including the slider that is located central authorities to and set up the second fixed plate on the slider. The utility model provides a distractor is built-in structure, sends the electromagnetic pulse signal by remote controller control transmitting coil and gives the built-in receiving coil who leads on the device to change the electromagnetic pulse signal into the signal of telecommunication that can driving motor work through motor drive circuit, thereby it is rotatory to drive the screw rod, and the slider that the activity set up on the screw rod reciprocates along the screw rod. The utility model discloses can effectively improve the effect of distraction osteogenesis, less infection probability, accurate control distraction osteogenesis's length reduces skin incision quantity and length, reduces scar hyperplasia.
Description
Technical Field
The utility model relates to a distractor technical field, concretely relates to built-in electromagnetic remote control jaw leads and opens osteogenesis distractor.
Background
Stretch bone formation is an endogenous bone tissue engineering technology, which is characterized in that bones are cut open, special stretching devices are arranged on two sides of a bone cutting line, after a certain delay period (5-7 days), a bone cutting gap (1-1.5 mm/day) is slowly stretched, the bone cutting gap is continuously widened, the potential of organism tissue regeneration is stimulated, new bone tissues are continuously formed in the stretch gap, and muscles, nerves, blood vessels, skins and the like around the bones are simultaneously prolonged at the same time, so that the aim of prolonging the bones is fulfilled.
The tradition leads a ware needs an external regulation pole of stretching out, this needs to place the regulation pole in skin additional wound when placing the ware of leading, and this incision needs to keep opening for a long time, can form comparatively obvious scar, open wound has also caused external environment and internal leading to a bone formation district to recanalize simultaneously, can not guarantee to lead to a bone formation district and be in internal sterile environment, easily cause to lead to a bone formation district infection, bone formation is bad and local necrosis even and leads to leading to a bone formation failure. Moreover, the adjusting rod extending out of the body greatly influences the normal life of the patient, and influences the psychology and physiology of the patient from both the aesthetic aspect and the functional aspect.
The traditional distractor has the following defects:
1) the traditional distractor needs to be placed so that the adjusting rod extends out of the additional cut, the position of the adjusting rod needs to be designed in advance when the distractor is installed, and the outlet of the adjusting rod needs to be close to skin, so that the installation position is limited, the distractor is limited when being applied to four limbs and other parts, and the adjusting rod extending out of the body influences normal life of a patient.
2) The traditional distractor needs the operation of a doctor when adjusting the distraction distance, and is adjusted by rotating an external adjusting rod, so that the rotation accuracy is poor, the controllability is poor, and the patient is difficult to adjust by himself.
3) The internal stretching device of the traditional stretching device is a spiral thin rod, and the stretching device can not continue stretching due to overlarge torsion in the clinical common stretching process, even the condition that the stretching rod is broken to cause stretching failure occurs.
4) The distraction osteogenesis cycle is long, during which the additional incision of the adjustment rod needs to be kept open for a long time, and because the incision is communicated with the internal distraction osteogenesis area, the infection probability is greatly increased, and the osteogenesis fails.
5) After the distraction is completed, the distraction device needs to be removed by extending the incision due to the elongation of the distraction device, and extra scars can be left.
The utility model patent of patent No. CN201810592989.8 specifically discloses a built-in electromagnetic remote control stretching and osteogenesis stretching device for jawbone, which comprises a stretching device and an electromagnetic remote controller; the traction device comprises an external sleeve with a sliding rail inside and an internal adjusting rod, wherein nail holes are formed in the external sleeve and the internal adjusting rod; the inner adjusting rod is connected in a sliding rail of the outer sleeve in a sliding manner, an automatic driving device is fixed at the rear end inside the outer sleeve, and a plurality of clamping grooves which are distributed side by side are uniformly formed in the inner adjusting rod; the outer sleeve is provided with a magnetic key corresponding to the clamping groove of the inner adjusting rod through an elastic sheet, and the magnetic key can be arranged in the sliding rail by passing through a telescopic hole in the side wall of the outer sleeve in a telescopic manner; the electromagnetic remote controller comprises an electromagnetic coil which can be magnetically adsorbed with the magnetic key, a singlechip which is connected with the electromagnetic coil in series and a power supply. The applicant improves the structure of the existing built-in distraction device and designs a built-in distraction device which can replace the disclosed built-in distraction device so as to further improve the distraction accuracy and the easy operation of the built-in distraction device.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the technical problem that above-mentioned exists with not enough, provide a built-in electromagnetic remote control jaw leads and opens osteogenesis distractor, can effectively improve the effect that leads and open osteogenesis, less infection probability.
The utility model adopts the technical proposal that:
a built-in electromagnetic remote control jaw bone stretching osteogenesis distractor,
the traction device comprises an internal traction device and an external remote control device, wherein the internal traction device comprises a screw rod, the screw rod is connected with a driving control device, the driving control device is connected with a receiving coil, a first fixing plate is arranged on the driving control device,
the screw rod is provided with a movable stretching component,
the external remote control device comprises a remote controller including
The keyboard module is connected to the first processor and used for sending an operation instruction to the first processing module;
the first processor is connected with the D/A converter, processes the received operation instruction and sends the processed operation instruction to the D/A converter;
the D/A converter is used for converting the operation instruction sent by the first processor into an electromagnetic pulse signal;
the transmitting coil is electrically connected with the first processor and used for transmitting the electromagnetic pulse signal transmitted by the first processing module to the receiving coil;
and the first power supply module is used for supplying power to the remote controller.
Preferably, the drive control means includes
The second processing module is electrically connected with the receiving coil and used for receiving the electromagnetic pulse signal;
the motor driving circuit is arranged between the second processing module and the motor and is used for driving the motor to work;
the motor is used for receiving an electric energy signal sent by the motor driving circuit and driving the screw rod to rotate;
and the second power supply module is used for supplying power to the drive control device.
Preferably, the movable stretching assembly comprises a sliding block positioned in the center and a second fixing plate arranged on the sliding block.
Preferably, the sliding block is of a hollow cylindrical structure, internal threads are arranged in the sliding block, and the sliding block is in threaded connection with the screw rod.
Preferably, the second fixing plate comprises a left movable wing and a right movable wing, and the left movable wing and the right movable wing are provided with the same number of through holes.
Preferably, the remote controller further comprises a display module, and the display module is connected to the first processing module and used for man-machine interaction.
Preferably, the first fixing plate comprises a left fixing wing and a right fixing wing, and the left fixing wing and the right fixing wing are both provided with the same number of through holes.
Preferably, the pitch on the screw is set to 0.1 mm.
Preferably, the motor drives the screw to rotate for one circle, and the distance between the tension assembly and the first fixing plate is increased by 0.25 mm.
Compared with the prior art, the utility model beneficial effect who has is: the utility model provides a distractor is built-in structure, send the receiving coil on the electromagnetic pulse signal gives built-in distraction device by remote controller control transmitting coil, and change the electromagnetic pulse signal into the signal of telecommunication that can the driving motor work through clicking drive circuit, thereby drive the screw rod rotation, the slider that the activity set up on the screw rod reciprocates along the screw rod, realize distraction osteogenesis, need not to stretch out external regulation pole, need not to relate to additional incision, place the position relatively freely when distraction osteogenesis, can be applied to most interior distraction osteogenesis region; the internal distraction device is controlled by an electromagnetic principle to control the distraction process of the internal distraction device, the distraction length is accurately controlled, a patient can operate by himself under the guidance of a doctor, post-operation distraction is relatively simple and easy to implement, the distraction length can be accurately determined every time, different distraction schemes are set according to different patients, and due to the fact that additional incisions are not required to be designed, the distraction device can be ensured to perform functions in the tissue in the distraction process, a distraction osteogenesis area is prevented from being formed to be communicated with the external environment, infection probability is reduced, and distraction osteogenesis quality and success rate are improved; can effectively improve the effect of distraction osteogenesis, reduce the infection probability, accurately control the length of distraction osteogenesis, reduce the number and the length of skin incisions and reduce the generation of scars. The utility model discloses well tractive subassembly is removed through the screw rod rotation, and the fine and close degree of pitch has played the important function to the control of tractive distance, and too wide pitch can produce certain error when the screw rod removes, and in addition, all can the production error between screw thread and the screw thread, and consequently, the screw rod displacement is big more, and the error accumulation is big more. And then improved the pitch on its screw rod, its pitch after improving sets up to 0.1mm, can effectively reduce the error through the precision finishing improvement pitch for control displacement is more accurate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram of an embodiment of the present invention, illustrating a built-in electromagnetic remote control stretching and bone-forming jaw distractor;
FIG. 2 is a circuit diagram of the motor drive circuit of FIG. 1;
fig. 3 is a schematic structural view of an internal distraction device of the internal electromagnetic remote-control jaw distraction osteogenesis distractor according to an embodiment of the present invention;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a left side view of FIG. 3;
fig. 6 is a schematic structural view of a movable distraction assembly of the built-in electromagnetic remote control jaw distraction osteogenesis distractor according to an embodiment of the present invention;
FIG. 7 is a top view of FIG. 6;
FIG. 8 is a left side view of FIG. 6;
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "first", "second", "third", etc. are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance, and furthermore, the terms "horizontal", "vertical", etc. do not mean that the components are absolutely required to be horizontal or overhung, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-5, the utility model discloses a built-in electromagnetic remote control jaw leads and opens osteogenesis distractor, this distractor includes built-in device and the external remote control unit that leads, built-in device that leads includes screw rod 1, be provided with the activity on the screw rod 1 and lead and open subassembly 2, screw rod 1 is connected with drive control device 4, drive control device 4 is connected with receiving coil 5, be provided with first fixed plate 3 on the drive control device 4, first fixed plate 3 includes left stationary vane 302 and right stationary vane 301, and all is provided with the through-hole of the same quantity on left stationary vane 302 and right stationary vane 301. The bone cutting device is characterized in that a part needing distraction osteogenesis is cut into bones, the built-in distraction device is built in, and through holes in the left fixing wing 302 and the right fixing wing 301 are respectively fixed on bone tissues at two ends of a bone cutting line through medical nails.
The external remote control device comprises a remote control 6, the remote control 6 comprising
The keyboard module 602, the keyboard module 602 is connected to the first processor 601, and is configured to send an operation instruction to the first processing module 601;
the first processor 601, the first processor 601 is connected to the D/a converter 604, processes the received operation instruction, and sends the processed instruction signal to the D/a converter 604;
a D/a converter 604, wherein the D/a converter 604 is used for converting the digital signal sent by the first processor 601 into an electromagnetic pulse signal;
the transmitting coil 605 is electrically connected with the first processor 601, and is used for transmitting the electromagnetic pulse signal transmitted by the first processing module 601 to the receiving coil;
and the display module 603, wherein the display module 603 is connected to the first processing module 601 for human-computer interaction.
The first power module 606, the first power module 606 is used for supplying power to the remote controller;
the drive control means 4 comprises
The second processing module 401 is electrically connected with the receiving coil 5, and is used for receiving the electromagnetic pulse signal;
the motor driving circuit 402 is arranged between the second processing module 401 and the motor 403, and is used for driving the motor 403 to work;
the motor 403 is used for receiving an electric energy signal sent by the motor driving circuit 402 and driving the screw rod 1 to rotate;
a second power module 404, wherein the second power module 404 is configured to supply power to the driving control apparatus 4.
As shown in fig. 2, the motor driving circuit uses the electromagnetic induction principle to convert the electromagnetic pulse signal into the voltage and current required for driving the motor to work.
The first processing module 601 and the second processing module 401 may be a printed circuit board integrated with a processor and an auxiliary integrated circuit chip, and auxiliary electronic components, and different types of interfaces are disposed on the printed circuit board for communication or electrical connection between the first processing module 601 and the second processing module 401 and other modules, such as an IC bus interface, a serial bus interface, and a parallel bus interface. In order to further reduce the volume of the first processing module and the second processing module, the printed circuit board can be two or three layers of circuit boards or more layers of circuit boards so as to reduce the volume of the first processing module and the second processing module.
The first power module 605 is built in the remote controller and configured to provide a stable power to the entire terminal, and a power output terminal of the first power module 605 is connected to a power input terminal of the first processing module 601 and provides power to the first processing module 601. The first power module 605 supplies power to other modules of the entire remote controller through the connection relationship between the first processing module 601 and the other modules, or supplies power to each module separately, which is not described herein. The first power module 605 is a rechargeable power source, which is convenient for the terminal to be used repeatedly and often, and improves the applicability of the terminal, and the first power module 605 adopts an existing rechargeable power source, which is not described herein again.
The power supply mode of the second power module 404 is the same as the power supply mode of the first power module 605, which is not described in detail, but since the second power module 404 is built in the human body, it is ensured that the electric energy of the second power module 404 is enough to support the operation of the distractor before the use.
The keyboard module 602 may be an integrated keyboard or a combination of multiple keys, and the keyboard module 602 is in data connection with the first processing module 601 through a serial bus. The keyboard module 602 is arranged on the side surface of the remote controller body and located below the display module 603, and when the remote controller is grasped, the keyboard module is close to a thumb, so that the thumb can press the remote controller conveniently, and a user can operate the distractor with one hand, and the use is convenient.
The display module 603 is arranged at the front end of the remote controller, and the display module 603 and the first processing module 601 in the remote controller are connected through a parallel bus to realize the mutual transmission of data. The display module 603 is integrally formed with the housing of the remote controller 6, and the display module integrally formed with the housing does not damage the integrity and the aesthetic property of the housing of the remote controller 6. The display module 603 is used for displaying remote control data and parameters for the operator to view.
The display module 603 is a touch screen, and the touch screen can operate the remote controller while displaying information.
As shown in fig. 5-7, the movable tension assembly 2 includes a sliding block 201 located at the center, and a second fixing plate disposed on the sliding block 201, the sliding block 201 is a hollow cylindrical structure, an internal thread is disposed inside the sliding block 201, the sliding block 201 is in threaded connection with the screw rod 1, the second fixing plate includes a left movable wing 203 and a right movable wing 202, and the left movable wing 203 and the right movable wing 202 are both provided with the same number of through holes 204.
At the beginning, the bone fracture ends are adjacent, the number of turns of rotation of the screw 1 is input through the keyboard module 602, the first processing module 601 sends a received turn number signal to the D/a converter 604, the D/a converter 604 converts the received turn number signal into an analog signal, namely, an electromagnetic pulse signal, the transmitting coil 605 sends the electromagnetic pulse signal to the receiving coil 5, the receiving coil 5 sends the received electromagnetic pulse signal to the second processing module 401, the second processing module 401 sends the received electromagnetic pulse signal to the motor driving circuit 402 to drive the motor 403 to work, under the driving of the motor 403, the screw 1 rotates, the sliding block 201 arranged on the screw 1 starts to move downwards, and when the screw 1 stops rotating, the sliding block finishes moving downwards and is fixed at the current position. The motor 403 starts the screw rod 1 to rotate for one circle, and the distance between the first fixing plate 3 and the second fixing plate 2 is increased by 0.25 mm.
The utility model discloses well tractive subassembly is through 1 rotations of screw rod and is removed, and the fine and close degree of pitch has played the important function to the control of tractive distance, and too wide pitch can produce certain error when screw rod 1 removes, and in addition, can all produce the error between screw thread and the screw thread, and consequently, screw rod displacement is big more, and the error accumulation is big more. And then improved the pitch on its screw rod, its pitch after improving sets up to 0.1mm, can effectively reduce the error through the precision finishing improvement pitch for control displacement is more accurate.
The internal stretching device is not powered when the external remote control device does not work, and the electric energy provided by the internal stretching device is human body safe voltage when the external remote control device works, and the device does not leak electricity, so that the stretching device can be safely used.
The utility model provides a distractor is built-in structure, send the receiving coil on the electromagnetic pulse signal gives built-in distraction device by remote controller control transmitting coil, and change the electromagnetic pulse signal into the electric signal of driving motor work through motor drive circuit, thereby drive the screw rod rotation, the slider that the activity set up on the screw rod reciprocates along the screw rod, realize the distraction osteogenesis, need not to stretch out external regulation pole, need not to relate to additional incision, place the position relatively freely when distraction osteogenesis, can be applied to most interior distraction osteogenesis region; the traction process of the internal traction apparatus is controlled through the electromagnetic principle, the traction length is accurately controlled, a patient can operate by himself under the guidance of a doctor, the postoperative traction is relatively simple and easy to implement, the traction length can be accurately determined every time, different traction schemes are set according to different patients, and due to the fact that additional incisions are not needed to be designed, the traction apparatus can be guaranteed to perform functions in the tissue in the traction process, the condition that a traction osteogenesis area is communicated with the external environment is avoided, the infection probability is reduced, and the traction osteogenesis quality and the success rate are improved; can effectively improve the effect of distraction osteogenesis, reduce the infection probability, accurately control the length of distraction osteogenesis, reduce the number and the length of skin incisions and reduce the generation of scars.
The specific operation method comprises the following steps:
preoperatively, the direction and the position of a osteotomy line are preliminarily determined through imaging examination, and different osteotomy modes are designed according to different diseases. Different operation incisions are designed according to the age, sex, expected installation position of the distractor and other factors of the patient. The bone fracture plate reaches a postoperative area through an operation incision approach, a periosteum is stripped, a bone cutting position is exposed, a distractor is arranged in the area, a fixed plate of the distractor is adjusted to be attached to the surface shape of a bone, and the cortex of the bone is sawn again according to the position of an osteotomy line. And fixing the distractor by using screws according to the designed installation position of the distractor. And (5) flushing, layering and suturing the wound, and finishing the operation.
There should be 3-7 days of rest period after operation. After the rest period, stretch was started. The distance of each stretching is set by an external remote control device of the stretching device, 3-4 times per day, and each time is 0.25-0.4 mm. According to the specific condition of a patient, the stretching speed and frequency are properly adjusted, after the distance required by osteogenesis is reached, the stretching control is stopped, the stretching distance is kept, after 6 months, a new bone is formed, and the stretching device is removed in an operation.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A built-in electromagnetic remote control jaw bone stretching osteogenesis stretcher is characterized in that the stretcher comprises a built-in stretching device and an external remote control device, the built-in stretching device comprises a screw rod, the screw rod is connected with a driving control device, the driving control device is connected with a receiving coil, a first fixing plate is arranged on the driving control device,
the screw rod is provided with a movable stretching component,
the external remote control device comprises a remote controller which comprises
The keyboard module is connected to the first processor and used for sending an operation instruction to the first processing module;
the first processor is connected with the D/A converter, processes the received operation instruction and sends the processed operation instruction to the D/A converter;
the D/A converter is used for converting the operation instruction sent by the second processor into an electromagnetic pulse signal;
the transmitting coil is electrically connected with the first processor and used for transmitting the electromagnetic pulse signal transmitted by the first processing module to the receiving coil;
and the first power supply module is used for supplying power to the remote controller.
2. The built-in electromagnetic remote-control jawbone distraction osteogenesis distractor of claim 1, wherein the driving control device comprises
The second processing module is electrically connected with the receiving coil and used for receiving the electromagnetic pulse signal;
the motor driving circuit is arranged between the second processing module and the motor and is used for driving the motor to work;
the motor is used for receiving an electric energy signal sent by the motor driving circuit and driving the screw rod to rotate;
and the second power supply module is used for supplying power to the drive control device.
3. The built-in electromagnetic remote controlled jawbone distraction osteogenesis distractor of claim 1, wherein the movable distraction assembly comprises a centrally located slide block and a second fixed plate disposed on the slide block.
4. The built-in electromagnetic remote control jaw bone distraction osteogenesis distractor according to claim 3, wherein the slide block is a hollow cylindrical structure, the interior of the slide block is provided with internal threads, and the slide block is in threaded connection with the screw rod.
5. The built-in electromagnetic remote control jaw bone distraction osteogenesis distractor of claim 3, wherein the second fixed plate comprises a left movable wing and a right movable wing, and the left movable wing and the right movable wing are provided with the same number of through holes.
6. The built-in electromagnetic remote-control jaw distraction osteogenesis distractor of claim 1, wherein the remote controller further comprises a display module, the display module is connected to the first processing module for human-computer interaction.
7. The built-in electromagnetic remote control jaw bone distraction osteogenesis distractor of claim 1, wherein the first fixing plate comprises a left fixing wing and a right fixing wing, and the left fixing wing and the right fixing wing are provided with the same number of through holes.
8. The built-in electromagnetic remote control jawbone distraction osteogenesis distractor of claim 1, wherein,
the thread pitch on the screw is set to be 0.1 mm.
9. The built-in electromagnetic remote controlled jawbone distraction osteogenesis distractor of claim 8, wherein the motor drives the screw to rotate for one circle, and the distance between the distraction assembly and the first fixing plate is increased by 0.25 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921859010.5U CN211131328U (en) | 2019-10-31 | 2019-10-31 | Built-in electromagnetic remote control jaw bone stretching and forming distractor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921859010.5U CN211131328U (en) | 2019-10-31 | 2019-10-31 | Built-in electromagnetic remote control jaw bone stretching and forming distractor |
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| Publication Number | Publication Date |
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| CN211131328U true CN211131328U (en) | 2020-07-31 |
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| CN201921859010.5U Expired - Fee Related CN211131328U (en) | 2019-10-31 | 2019-10-31 | Built-in electromagnetic remote control jaw bone stretching and forming distractor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110638511A (en) * | 2019-10-31 | 2020-01-03 | 中国人民解放军北部战区总医院 | Built-in electromagnetic remote control jaw bone stretching and forming distractor and operation method |
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2019
- 2019-10-31 CN CN201921859010.5U patent/CN211131328U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110638511A (en) * | 2019-10-31 | 2020-01-03 | 中国人民解放军北部战区总医院 | Built-in electromagnetic remote control jaw bone stretching and forming distractor and operation method |
| CN110638511B (en) * | 2019-10-31 | 2024-10-29 | 中国人民解放军北部战区总医院 | Built-in electromagnetic remote control jaw stretching osteogenesis stretching device and operation method |
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Granted publication date: 20200731 |