CN211834585U - Osteotomy amount measuring device - Google Patents
Osteotomy amount measuring device Download PDFInfo
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- CN211834585U CN211834585U CN201921726186.3U CN201921726186U CN211834585U CN 211834585 U CN211834585 U CN 211834585U CN 201921726186 U CN201921726186 U CN 201921726186U CN 211834585 U CN211834585 U CN 211834585U
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Abstract
The application provides a device for measuring osteotomy amount, the device includes: the measuring structure comprises a measuring body part, a distance measuring module, a sliding measuring module and an angle measuring module; the power supply unit is positioned in the accommodating cavity and comprises a Hall switch; and the magnetic part is matched with the Hall switch, and the Hall switch is closed under the condition that the distance between the magnetic part and the Hall switch is less than or equal to a preset distance. The movable magnetic part is close to the measuring device, the Hall switch is closed under the condition that the distance between the magnetic part and the Hall switch is smaller than or equal to the preset distance, the power supply unit is further controlled to supply power to the measuring structure, when the measuring structure is in a non-working state, the magnetic part is controlled to be far away from the measuring device, the measuring device measures to obtain measured data, the measured data comprise coordinates of all measuring points on the surface of the femoral condyle in a preset space coordinate system, and then the coordinate values of the measuring points are used as a bone cutting amount reference value, so that accurate bone cutting in a three-dimensional space can be realized.
Description
Technical Field
The application relates to the field of detection, in particular to a bone cutting amount measuring device.
Background
The total knee replacement, one of the major joint replacements, is a mature operation, and the research on the success of total knee replacement and the influence factors on the clinical efficacy of total knee replacement has been a problem of concern. The method has the advantages that good clinical long-term curative effect, selection of indications, selection of prostheses, accurate surgical skills and management before surgery are all important, and particularly, the requirement on the surgical skills is high, namely, accurate osteotomy and three-dimensional placement of the prostheses are carried out on a three-dimensional space, and the balance and stability of time gaps of flexion and extension of knee joints and soft tissues such as ligaments and the like are also required to be paid attention, so that accurate and correct placement of femoral, tibial and patella prosthesis components is ensured.
The most important goals of total knee arthroplasty are to restore lower limb force lines and balance the knee flexion-extension gap. The lower limb force line is an imaginary straight line starting from the femoral head rotation center and ending at the midpoint of the medial malleolus and the lateral malleolus and represents a mechanical conduction line of the lower limb of a normal human body in a weight bearing position. For normal people, the eversion angle of 5-7 degrees exists between the distal femur side of the lower limb and the force line, and the eversion angle of 2-3 degrees exists between the proximal tibia side and the force line, so that the anatomical factors must be considered when the knee joint osteotomy in the TKA operation is carried out, the lower limb force line is reconstructed to an ideal state that the varus and valgus tend to 0 degrees, and accurate osteotomy is a key link for ensuring the accuracy of the lower limb force line.
With the popularization of intelligent devices, people use the intelligent devices more and more frequently, and the power consumption of the intelligent devices is larger and larger, so that the standby time of the intelligent devices is shorter and shorter.
All new smart devices, as well as past smart phones and computers, use batteries as energy sources. The smaller the power consumption of these devices, the longer their standby time. The contrary is that the higher the performance of the device, the more power consumption, and the more frequent the use of the device, the more power consumption of the device. Therefore, in order to prolong the service time of the device, when the user does not use the intelligent device, the related service in the device is stopped/suspended, so that the power can be effectively saved.
However, when the services in the smart device are in a stopped/deactivated/suspended state, the smart device remains in a standby mode, is not powered off, and still consumes power, which obviously does not take advantage of the smart device's stored power management. The power supply is completely cut off through the power switch, so that the standby electric quantity consumption can be avoided to the maximum extent, and if the intelligent equipment in the shutdown mode is restored to the standby state again, the intelligent equipment needs to be awakened.
In the prior art, the intelligent equipment in a shutdown mode is awakened by a physical push switch generally, so that the preoperative sterilization requirement of a surgical tool is difficult to meet and the problem of secondary pollution caused by the push switch after sterilization is solved. If the software is used for waking up, the intelligent device must be kept in a standby mode and is not powered off, and power consumption still occurs, which obviously does not utilize the storage power management of the intelligent device.
SUMMERY OF THE UTILITY MODEL
The main objective of this application is to provide a device for measuring osteotomy volume to solve the problem that the arousal technique of the device for measuring osteotomy volume in the prior art can produce secondary pollution and power consumption is more.
In order to achieve the above object, according to one aspect of the present application, there is provided an osteotomy amount measuring device, the device comprising: the measuring structure comprises a measuring body part, a distance measuring module, a sliding measuring module and an angle measuring module, wherein the measuring body part is provided with an accommodating cavity, the distance measuring module, the sliding measuring module and the angle measuring module are positioned in the accommodating cavity, the measuring structure can move along the length direction of the measuring structure, the distance measuring module is used for measuring the distance between each measuring point on the surface of the femoral condyle and a reference plane, the reference plane is a plane where a predetermined point of the distance measuring module is positioned, the reference plane is parallel to an XY plane in a predetermined space coordinate system, the sliding measuring module is used for measuring the distance between a projection point and a coordinate origin, the coordinate origin is an origin of the predetermined space coordinate system, the projection point is a projection of the measuring point on the XY plane in the predetermined space coordinate system, and the angle measuring module is used for measuring an included angle between a predetermined connecting line and an X axis, the preset connecting line is a connecting line between the projection point and the coordinate origin; the power supply unit is positioned in the accommodating cavity and comprises a Hall switch, and the Hall switch is used for controlling whether the power supply unit supplies power to the measuring structure at least; the magnetic part is matched with the Hall switch, and the Hall switch is closed under the condition that the distance between the magnetic part and the Hall switch is smaller than or equal to a preset distance.
Further, the measurement body part comprises a first end and a second end, the measurement body part further comprises a middle part located between the first end and the second end, and the ranging module is located in the accommodating cavity corresponding to the first end.
Further, the sliding measuring module and the angle measuring module are located at intervals in the corresponding accommodating cavities of the middle part.
Further, the ranging module includes: a laser emitting structure for emitting ranging laser from the predetermined point to the measuring point; a laser receiving structure for receiving the ranging laser reflected from the measuring point back to the predetermined point.
Further, the measuring device further includes: and the data processing unit is positioned in the accommodating cavity.
Further, the data processing unit includes: the data storage module is used for storing the measurement data of the measurement structure; the wireless data transmission module is used for transmitting the measurement data to a computer or mobile equipment; the micro-control module is used for calculating the measurement data; and the power supply circuit is electrically connected with the data storage module, the wireless data transmission module and the micro control module respectively.
Further, the measuring device further includes: the positioning structure comprises a mounting groove; the supporting piece comprises a third end and a fourth end, the third end is located in the mounting groove, the fourth end protrudes out of the positioning structure, the measuring body part is connected with the third end, and the middle part is connected with the fourth end.
Further, the positioning structure includes: the mounting groove is positioned on the positioning body part, and the positioning body part is provided with a positioning hole; and the positioning piece is arranged in the positioning hole in a penetrating way.
Further, the positioning piece is a Kirschner wire.
Further, the measuring structure may be rotatable about the support and movable along a length of the measuring structure.
By applying the technical scheme, the movable magnetic part is close to the measuring device, the Hall switch is closed under the condition that the distance between the magnetic part and the Hall switch is smaller than or equal to the preset distance, the power supply unit is further controlled to supply power to the measuring structure, when the measuring structure is in a non-working state, the magnetic part is controlled to be far away from the measuring device, the measuring device measures to obtain measured data, the measured data comprise coordinates of all measuring points on the surface of the femoral condyle in a preset space coordinate system, including an X-axis coordinate, a Y-axis coordinate and a Z-axis coordinate, the accurate positions of all measuring points are further obtained according to the measured coordinate values, the coordinate values of the measuring points are further used as osteotomy quantity reference values, accurate osteotomy in a three-dimensional space can be realized, the control of the measured data is not required to be realized through keys, knobs, touch screens and the like, and the control program, in addition, in the data measurement process, the medical equipment does not need to be contacted, and secondary pollution is avoided.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
FIG. 1 illustrates a partial schematic view of an osteotomy measurement device in use, in accordance with an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating a partial structure of an osteotomy measuring device according to an embodiment of the present application;
FIG. 3 is a schematic diagram illustrating a partial structure of another osteotomy measurement device according to an embodiment of the present application; and
fig. 4 is a schematic diagram illustrating a partial structure of another osteotomy measuring device according to an embodiment of the present application.
Wherein the figures include the following reference numerals:
1. a femur to be tested; 10. a positioning structure; 11. mounting grooves; 12. positioning the body part; 13. a positioning member; 20. a support member; 21. a third end; 22. a fourth end; 30. a measurement structure; 31. a measurement body section; 32. a distance measurement module; 320. a laser emitting structure; 321. a laser receiving structure; 33. a sliding measurement module; 34. an angle measurement module; 35. an accommodating chamber; 36. a first end; 37. a second end; 40. a data processing unit; 41. a data storage module; 42. a wireless data transmission module; 43. a micro-control module; 44. a power supply circuit; 45. a pre-processing circuit; 450. a filtering module; 451. an amplifying module; 452. an analog-to-digital conversion module; 50. a power supply unit.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As described in the background art, in the prior art, the wake-up technology of the osteotomy amount measuring device may cause secondary pollution and consume more power, and in order to solve the above problem that the wake-up technology of the osteotomy amount measuring device may cause secondary pollution and consume more power, the present application provides an osteotomy amount measuring device.
Fig. 1 and 2 are partial structural schematic views of an osteotomy measuring device according to an embodiment of the present application. As shown in fig. 1 and 2, the measuring apparatus includes:
the measuring structure 30 comprises a measuring body 31, a distance measuring module 32, a sliding measuring module 33 and an angle measuring module 34, the measurement body 31 has a receiving cavity 35, the distance measuring module 32, the sliding measuring module 33 and the angle measuring module 34 are located in the receiving cavity 35, the measuring structure 30 is movable in a longitudinal direction of the measuring structure 30, the reference plane is a plane where a predetermined point of the ranging module 32 is located, and the reference plane is parallel to the XY plane in the predetermined spatial coordinate system, the sliding measurement module 33 is used to measure the distance between the projection point and the coordinate origin, the origin of the coordinates is the origin of a predetermined spatial coordinate system, the projection point is the projection of the measurement point on the XY plane in the predetermined spatial coordinate system, the angle measuring module 34 is configured to measure an included angle between a predetermined connecting line and an X axis, where the predetermined connecting line is a connecting line between the projection point and the coordinate origin;
a power supply unit 50 located in the accommodating cavity 35, wherein the power supply unit 50 includes a hall switch (not shown in the figure) for controlling whether the power supply unit 50 supplies power to at least the measuring structure 30;
and a magnetic part (not shown in the figure) which is matched with the Hall switch, wherein the Hall switch is closed when the distance between the magnetic part and the Hall switch is less than or equal to a preset distance.
In the scheme, the movable magnetic part is close to the measuring device, when the distance between the magnetic part and the Hall switch is smaller than or equal to the preset distance, the Hall switch is closed, the power supply unit is further controlled to supply power to the measuring structure, when the measuring structure is in a non-working state, the magnetic part is controlled to be far away from the measuring device, the measuring device measures to obtain measured data, the measured data comprises coordinates of each measuring point on the surface of the femoral condyle in a preset space coordinate system, as shown in figure 3, the coordinates comprise an X-axis coordinate, a Y-axis coordinate and a Z-axis coordinate, the accurate position of each measuring point is obtained according to the measured coordinate values, the coordinate values of the measured points are further used as a bone cutting amount reference value, accurate bone cutting in a three-dimensional space can be realized, the control of the measured data is not required to be realized through a key, a knob or a touch screen, and, in addition, in the data measurement process, the medical equipment does not need to be contacted, and secondary pollution is avoided.
A predetermined space coordinate system is defined in advance, the surface of the femoral condyle is a curved surface, a certain distance is arranged between an XY plane in the predetermined space coordinate system and the surface of the femoral condyle, each measuring point on the surface of the femoral condyle is projected onto the XY plane in the predetermined space coordinate system, the distance between each projection point and a coordinate origin can be obtained, and then the X-axis coordinate and the Y-axis coordinate of each measuring point on the surface of the femoral condyle can be obtained according to the trigonometric function principle by combining the measured angle. For example, as shown in fig. 3, if the projection point P' of a certain measurement point P on the femoral condyle surface on the XY plane in the predetermined spatial coordinate system is at a distance L from the origin of coordinates, and the measured included angle is set to be a positive included angle with the X axis, and the included angle is θ, then the X-axis coordinate of the measurement point is Lcos θ, and the Y-axis coordinate of the measurement point is lssin θ.
In an embodiment of the present application, as shown in fig. 2, the measurement body 31 further includes a first end 36 and a second end 37, the measurement body 31 further includes an intermediate portion located between the first end 36 and the second end 37, the distance measuring module 32 is located in the accommodating cavity 35 corresponding to the first end 36, and the distance measuring module 32 is disposed in the accommodating cavity 35 corresponding to the first end 36, which is beneficial to increase a measurement range.
In an embodiment of the present application, as shown in fig. 2, the sliding measuring module 33 and the angle measuring module 34 are located in the accommodating cavity 35 corresponding to the middle portion at intervals, so that the measured data measured by the sliding measuring module 33 and the angle measuring module 34 are more accurate, and how to set the relative position relationship between the sliding measuring module 33 and the angle measuring module 34, a person skilled in the art can set the relationship according to actual situations.
In an embodiment of the present application, the distance measuring module is a laser distance measuring module, as shown in fig. 2, the distance measuring module 32 includes a laser emitting structure 320 and a laser receiving structure 321, the laser emitting structure 320 is configured to emit a distance measuring laser from the predetermined point to the measuring point; the laser receiving structure 321 is used for receiving the ranging laser reflected from the measuring point back to the predetermined point. As shown in fig. 3, the laser emitting structure emits laser light to a measurement point P from a predetermined point O (a point on a reference plane) which is a point on the reference plane parallel to and having a predetermined distance from an XY plane in the predetermined spatial coordinate system; a laser receiving structure for receiving the laser light reflected from the measuring point P at the predetermined point O; determining a first distance based on a time difference between emitting the laser light and receiving the laser light, and based on the time difference and a propagation speed of the laser light. The laser has the properties of high precision and high energy, a relatively precise distance can be measured by utilizing laser ranging, a first distance can be determined by utilizing the reflection characteristic of the laser and further combining time difference and the propagation speed of the laser, the reference plane is parallel to the XY plane in the preset space coordinate system and has a preset distance, the second distance is the distance between the reference plane and the XY plane in the preset space coordinate system, and the difference value of the first distance and the second distance is calculated to obtain the Z-axis coordinate of each measuring point. As shown in FIG. 3, a reference plane is set at a distance from the XY-plane of the predetermined spatial coordinate system, and the reference plane is set in a direction away from the condyle surface of the femur so that the condyle surface of the femur is between the XY-plane of the spatial coordinate system and the reference plane, and the Z-axis coordinate of the measurement point can be determined according to the difference between the first distance and the second distance, as shown in FIG. 3, the Z-axis coordinate of the measurement point is H1-H2 when the first distance is set to H2 and the second distance is set to H1.
In an embodiment of the present application, the process of obtaining the first distance includes: as shown in fig. 3, laser light is emitted from a predetermined point O, which is a point on the reference plane parallel to and having a predetermined distance from the XY plane in the predetermined spatial coordinate system, to the measurement point P; receiving the laser light reflected from the measurement point P at the predetermined point O; the first distance is determined based on a time difference between the emission of the laser beam and the reception of the laser beam, and based on the time difference and a propagation speed of the laser beam. Then, H2 ═ Δ t × v, and in this embodiment, the plane in which the predetermined point is located and which is parallel to the XY plane in the predetermined spatial coordinate system is the reference plane.
In an embodiment of the present application, as shown in fig. 2, the measuring device further includes a data processing unit 40, and the data processing unit 40 is located in the accommodating cavity 35, so that the space utilization rate of the device is high, and the space is saved.
In an embodiment of the present application, as shown in fig. 2 and fig. 4, the data processing unit 40 includes a data storage module 41, a wireless data transmission module 42, a micro control module 43, and a power supply circuit 44, where the data storage module 41 is configured to store the measurement data of the measurement structure 30; the wireless data transmission module 42 is used for transmitting the measurement data to a computer or a mobile device; the micro control module 43 is used for calculating the measurement data; the power supply circuit 44 is electrically connected to the data storage module 41, the wireless data transmission module 42, and the micro control module 43, respectively.
In an embodiment of the present application, as shown in fig. 1 and fig. 4, the data processing unit 40 further includes a preprocessing circuit 45, and the preprocessing circuit 45 includes a filtering module 450, an amplifying module 451, and an analog-to-digital conversion module 452. Generally speaking, due to the influence of external noise, noise signals are often doped in the measurement data, so that the measurement data is filtered to filter the noise signals in the measurement data, more accurate measurement data can be obtained, and more accurate bone fracture amount can be obtained according to the measurement data. Specifically, the filtering process may be a low-pass filtering process, a high-pass filtering process, a band-pass filtering process, and the like, and a specific filtering process is selected, which is determined by a person skilled in the art according to specific properties of the detected measurement data. In addition, the measured measurement data is often small, for example, the size is 0-30 mV, so that the filtered measurement data is amplified, specifically, the amplification can be realized by connecting a front-end amplification circuit, and the selection of the front-end amplification circuit is selected by a person skilled in the art according to actual conditions; in order to facilitate information processing, the analog signals are converted into digital signals, and then the digital signals can be processed by a microprocessor.
In an embodiment of the present application, as shown in fig. 1 and 2, the above-mentioned measuring device further includes a positioning structure 10 and a supporting member 20, the positioning structure 10 includes a mounting groove 11; the support member 20 includes a third end 21 and a fourth end 22, the third end 21 is located in the mounting groove 11, the fourth end 22 protrudes from the positioning structure 10, the measurement body 31 is connected to the fourth end 22, and the middle portion is connected to the fourth end 22.
In an embodiment of the present application, as shown in fig. 1, the positioning structure 10 includes a positioning body 12 and a positioning element 13, the mounting groove 11 is located on the positioning body 12, and the positioning body 12 has a positioning hole; the positioning piece 13 is inserted into the positioning hole (not shown in the figure); the positioning member 13 is inserted into the positioning hole. The positioning element 13 further ensures that the measuring device can be stably fixed to the femur 1 to be measured during use.
In an embodiment of the present application, as shown in fig. 1, the positioning element 13 is a kirschner wire, which is thin, and it can further ensure that the measuring device can be more reliably fixed on the femur 1 to be measured.
In an embodiment of the present application, the magnetic part is a magnet, and the magnetic strength of the magnet can be selected according to actual situations.
In an embodiment of the present application, as shown in fig. 2, the measuring device further includes a power supply unit 50, and the power supply unit 50 is located in the accommodating cavity 35. The power supply unit 50 supplies power to the distance measuring module 32, the sliding measuring module 33, the angle measuring module 34, and the data processing unit 40.
As shown in fig. 2, since the ranging module 32, the laser emitting structure 320, the laser receiving structure 321, the sliding measuring module 33, the angle measuring module 34, the data processing unit 40 and the power supply unit 50 are all located in the accommodating chamber 35, they cannot be seen from the outside, and are indicated by dotted lines in fig. 2 in order to show the approximate positions of the above structures.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:
the osteotomy measuring device comprises a movable magnetic part, a Hall switch, a power supply unit, a measuring structure, a power supply unit, a measuring device and a power supply unit, wherein the movable magnetic part is close to the measuring device, the Hall switch is closed under the condition that the distance between the magnetic part and the Hall switch is smaller than or equal to a preset distance, the power supply unit is further controlled to supply power to the measuring structure, when the measuring structure is in a non-working state, the magnetic part is controlled to be away from the measuring device, the measuring device measures to obtain measured data, the measured data comprises coordinates of all measuring points on the surface of a femoral condyle in a preset space coordinate system, the coordinates comprise an X-axis coordinate, a Y-axis coordinate and a Z-axis coordinate, the accurate positions of all the measuring points are further obtained according to the measured coordinate values, the coordinate values of the measured points are further used as an osteotomy reference value, accurate osteotomy in a three, in addition, in the data measurement process, the medical equipment does not need to be contacted, and secondary pollution is avoided.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An osteotomy quantity measuring device, comprising:
the measuring structure comprises a measuring body part, a distance measuring module, a sliding measuring module and an angle measuring module, wherein the measuring body part is provided with an accommodating cavity, the distance measuring module, the sliding measuring module and the angle measuring module are positioned in the accommodating cavity, the measuring structure can move along the length direction of the measuring structure, the distance measuring module is used for measuring the distance between each measuring point on the surface of the femoral condyle and a reference plane, the reference plane is a plane where a predetermined point of the distance measuring module is positioned, the reference plane is parallel to an XY plane in a predetermined space coordinate system, the sliding measuring module is used for measuring the distance between a projection point and a coordinate origin, the coordinate origin is an origin of the predetermined space coordinate system, the projection point is a projection of the measuring point on the XY plane in the predetermined space coordinate system, and the angle measuring module is used for measuring an included angle between a predetermined connecting line and an X axis, the preset connecting line is a connecting line between the projection point and the coordinate origin;
the power supply unit is positioned in the accommodating cavity and comprises a Hall switch, and the Hall switch is used for controlling whether the power supply unit supplies power to the measuring structure at least;
the magnetic part is matched with the Hall switch, and the Hall switch is closed under the condition that the distance between the magnetic part and the Hall switch is smaller than or equal to a preset distance.
2. The measurement device of claim 1, wherein the measurement body portion includes a first end and a second end, the measurement body portion further including an intermediate portion between the first end and the second end, the ranging module being located within a corresponding receiving cavity of the first end.
3. The measurement device of claim 2, wherein the sliding measurement module and the angular measurement module are spaced apart within corresponding receiving cavities of the intermediate portion.
4. The measurement device of any one of claims 1 to 3, wherein the ranging module comprises:
a laser emitting structure for emitting ranging laser from the predetermined point to the measuring point;
a laser receiving structure for receiving the ranging laser reflected from the measuring point back to the predetermined point.
5. The measurement device according to any one of claims 1 to 3, further comprising:
and the data processing unit is positioned in the accommodating cavity.
6. The measurement device according to claim 5, wherein the data processing unit comprises:
the data storage module is used for storing the measurement data of the measurement structure;
the wireless data transmission module is used for transmitting the measurement data to a computer or mobile equipment;
the micro-control module is used for calculating the measurement data;
and the power supply circuit is electrically connected with the data storage module, the wireless data transmission module and the micro control module respectively.
7. The measurement device of claim 2, further comprising:
the positioning structure comprises a mounting groove;
the supporting piece comprises a third end and a fourth end, the third end is located in the mounting groove, the fourth end protrudes out of the positioning structure, the measuring body part is connected with the third end, and the middle part is connected with the fourth end.
8. The measurement device of claim 7, wherein the positioning structure comprises:
the mounting groove is positioned on the positioning body part, and the positioning body part is provided with a positioning hole;
and the positioning piece is arranged in the positioning hole in a penetrating way.
9. A measuring device according to claim 8, wherein the locating member is a K-wire.
10. A measuring device as claimed in any of claims 7 to 9, wherein the measuring structure is rotatable about the support and moveable along the length of the measuring structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921726186.3U CN211834585U (en) | 2019-10-15 | 2019-10-15 | Osteotomy amount measuring device |
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| CN201921726186.3U CN211834585U (en) | 2019-10-15 | 2019-10-15 | Osteotomy amount measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110623702A (en) * | 2019-10-15 | 2019-12-31 | 北京爱康宜诚医疗器材有限公司 | Osteotomy amount measuring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110623702A (en) * | 2019-10-15 | 2019-12-31 | 北京爱康宜诚医疗器材有限公司 | Osteotomy amount measuring device |
| CN110623702B (en) * | 2019-10-15 | 2024-04-02 | 北京爱康宜诚医疗器材有限公司 | Osteotomy measuring device |
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