Multifunctional knee femoral quadruple osteotomy device

Abstract

The present application relates to the field of medical devices, in particular to a multifunctional knee femur quadruple osteotomy device. The osteotomy device comprises a quadruple osteotomy plate, a guide, an eccentricity measurer, a locking screw and a front condyle splint. The quadruple osteotomy plate is provided with a locking hole and a threaded hole. The axis of the locking hole is perpendicular to the axis of the threaded hole, and the threaded hole penetrates into the locking hole. The guide is arranged in the locking hole, and the guide is provided with a limiting groove. The guide is inserted into the locking hole, and the locking screw is screwed into the threaded hole and inserted into the limiting groove. The eccentricity measurer is rotatably connected to the guide, and the circumferential direction of the guide is provided with a first scale. The eccentricity measurer is provided with an eccentricity measuring hole. The quadruple osteotomy plate is provided with a clamping groove, the front condyle splint is provided with a clamping table, and the front condyle splint is provided with a second scale. Thus, the problem of single function, limited use range and difficulty in ensuring osteotomy accuracy of the existing osteotomy device is solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of medical devices, and relates to a multifunctional quadruple knee femur osteotomy device. BACKGROUND

[0002] In recent years, artificial knee joint replacement has developed rapidly and matured, and the number of patients choosing artificial knee joint replacement is also increasing. Knee arthroplasty is one of the common surgical methods for treating knee osteoarthritis, traumatic arthritis, rheumatoid arthritis and other diseases in clinical practice, and the postoperative effect is good.

[0003] The osteotomy device in the prior art needs to be repositioned in steps during use, which may cause positioning errors, resulting in inaccurate knee femur osteotomy, and further causing the femoral condyle prosthesis to be too tight or even not to be installed, or the femoral condyle prosthesis to be too loose. The latest device, a quadruple knee osteotomy device, can perform osteotomy on the four surfaces of the knee femur anterior condyle, posterior condyle, anterior slope and posterior slope during knee surgery, but it is found that there are still some shortcomings in its use, which causes the knee surgery operation to fail to achieve the expected results and the best use effect, and the shortcomings can be summarized as follows:

[0004] 1. The quadruple osteotomy device needs to correspond to the femoral condyle prosthesis specifications, so it needs to be configured with more specifications, which is large in size and heavy in quality, resulting in poor hand feeling during use and extremely limited application range.

[0005] 2. Due to the thickness of the quadruple osteotomy device, the operator may produce osteotomy errors during the in-surgery sawing operation due to the difference in operation, resulting in inaccurate knee femur osteotomy.

[0006] 3. When installing the quadruple osteotomy device, the positioning needs to refer to the bone markers, and when the bone markers are not easy to identify, the positioning will be affected, causing the osteotomy to deviate and affecting the surgical effect.

[0007] Based on the above reasons, in view of the problems of single function, limited use range and difficulty in ensuring osteotomy accuracy of the osteotomy device, a more reasonable technical solution needs to be proposed to solve the current technical problems. SUMMARY

[0008] The purpose of the present application is to provide a multifunctional quadruple knee femur osteotomy device to solve the problems of single function, limited use range and difficulty in ensuring osteotomy accuracy of the osteotomy device in the prior art.

[0009] In order to achieve the above object, the present application provides a multifunctional knee femur quadruple osteotomy device, comprising a quadruple osteotomy plate for osteotomy of the knee femur, a guide, an eccentricity measurer, a locking pin and a front condyle splint; the quadruple osteotomy plate is provided with a locking hole matched with the guide and a threaded hole matched with the locking pin, the axial line direction of the locking hole is perpendicular to the axial line direction of the threaded hole, and the threaded hole penetrates into the locking hole;

[0010] The guide is arranged in the locking hole, and the guide is provided with a limiting groove; the guide is inserted into the locking hole, the locking pin is screwed into the threaded hole and inserted into the limiting groove, so as to keep the position of the guide relative to the osteotomy plate;

[0011] The eccentricity measurer is rotatably connected to the guide, and the circumferential direction of the guide is provided with a first scale; the eccentricity measurer is used for measuring the eccentric angle of the medullary cavity; the eccentricity measurer is also provided with an eccentricity measuring hole for inserting a medullary nail;

[0012] The quadruple osteotomy plate is provided with a clamping groove, the front condyle splint is provided with a clamping table matched with the clamping groove, the front condyle splint extends along the axial line direction of the locking hole, and the front condyle splint is provided with a second scale for measuring the distance from the front condyle of the femoral condyle to the distal end of the femoral condyle.

[0013] In a possible design, the front condyle splint comprises a U-shaped structure, and the ends of the U-shaped front condyle splint are respectively provided with the clamping table; the quadruple osteotomy plate is provided with two clamping grooves corresponding to the clamping tables one by one; the clamping table is T-shaped, and the clamping groove is inverted T-shaped structure matched with the clamping table.

[0014] In a possible design, the eccentricity measurer is provided with a first eccentric hole extending in a first direction and a second eccentric hole extending in a second direction, the first eccentric hole and the second eccentric hole have the same hole diameter, and the first eccentric hole and the second eccentric hole partially overlap to form a measuring hole together, wherein the axial line of the first eccentric hole is spaced apart from the axial line of the second eccentric hole by a distance D, and the size of D gradually decreases in the direction pointing to the medullary cavity.

[0015] In a possible design, the maximum distance between the axial line of the first eccentric hole and the axial line of the second eccentric hole is 6mm, and the minimum distance between the axial line of the first eccentric hole and the axial line of the second eccentric hole is 1mm, 1mm≤D≤6mm.

[0016] In a possible design, the center hole side wall of the guide is provided with a limiting shaft, the eccentricity measurer is provided with an annular groove matched with the limiting shaft, and the limiting shaft is inserted into the annular groove to limit the degree of freedom of the eccentricity measurer.

[0017] In a possible design, the limiting shafts are two and symmetrically arranged.

[0018] In a possible design, the guide is provided with a positioning platform, the four-in-one osteotomy plate is provided with a positioning groove matched with the positioning platform, and the positioning platform is embedded in the positioning groove.

[0019] In a possible design, the four-in-one osteotomy plate, the guide, the eccentricity measurer, the locking screw and the anterior condyle bracket are all made of medical stainless steel.

[0020] In use, the four-in-one osteotomy plate is fixed on the distal femur osteotomy surface of the knee joint, and then the anterior condyle, the posterior condyle, the posterior slope and the anterior slope of the femur of the knee joint are cut, the guide is installed on the four-in-one osteotomy plate, the locking screw is used for fixation, the eccentricity measurer is adjusted according to the femoral canal morphology of the patient, the eccentric angle and the eccentric distance of the femoral canal of the patient are measured, and finally the anterior condyle bracket is assembled, so as to directly measure the distance from the anterior condyle of the femoral condyle to the distal end of the femoral condyle.

[0021] By the above technical scheme, the four-surface osteotomy of the anterior condyle, the posterior condyle, the anterior slope and the posterior slope of the femur of the knee joint can be completed by using the osteotomy device, and the operation time can be shortened. The design of the anterior condyle bracket can measure the distance from the anterior condyle osteotomy amount of the femoral condyle to the distal end surface of the femoral condyle, and provide more intuitive and more accurate osteotomy amount for the doctor, so that the joint can better adapt to the prosthesis, and the postoperative recovery effect is guaranteed. The eccentricity measurer can effectively measure the eccentric angle and the eccentric distance of the femoral canal, and can accurately measure the eccentric angle and the eccentric distance according to different femoral canal morphologies of different patients, so as to provide a basis for the installation of the knee femoral lengthening stem prosthesis and ensure the operation effect. Based on the overall detachable design, the anterior condyle bracket can be removed during osteotomy, so as to reduce the overall weight, facilitate taking and using, and improve the use feeling of the operator during operation. In addition to the four-surface osteotomy of the femur of the knee joint, the osteotomy of the posterior condyle with multiple thicknesses can also be performed on the patients with greater posterior condyle damage of the knee joint, so as to install the knee posterior condyle block prosthesis, and the stability of the prosthesis installation is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only represent some embodiments of the present application, and for those skilled in the field, other drawings can be obtained based on these drawings without any creative effort.

[0023] Figure 1 is a top view structural schematic diagram of a multifunctional knee femur four-in-one osteotomy device in an embodiment provided by the present application;

[0024] Figure 2 is a structural schematic diagram along the direction of A-A in Figure 1 ;

[0025] Figure 3 is a structural schematic diagram along the direction of B-B in Figure 1 ;

[0026] Figure 4 is a structural schematic diagram along the direction of C-C in Figure 1 ;

[0027] Figure 5 is a three-dimensional structural schematic diagram of a multifunctional knee femur four-in-one osteotomy device in an embodiment provided by the present application.

[0028] In the above drawings: 1-four-in-one osteotomy plate, 2-guide, 3-eccentricity measurer, 301-first eccentric hole, 302-second eccentric hole, 4-locking screw, 5-anterior condyle splint, 6-limiting shaft, 7-annular groove. DETAILED DESCRIPTION

[0029] The present application will be further described below in conjunction with the drawings and specific embodiments. It should be noted that the description of these embodiments is used to help understand the present application, but does not constitute a limitation of the present application. The specific structural and functional details disclosed herein are only used to describe the example embodiments of the present application. However, the present application can be embodied in many alternative forms, and should not be understood as limited in the embodiments set forth herein.

[0030] According to the specific embodiment of the present disclosure, a multifunctional knee femur four-in-one osteotomy device is provided, which comprises a four-in-one osteotomy plate 1 for osteotomy of the knee femur. The four-in-one osteotomy plate 1 is a prior art which can perform four-face osteotomy on the anterior condyle, posterior condyle, anterior slope and posterior slope of the knee femur. After the four-face osteotomy is completed, it can be determined whether the posterior condyle osteotomy of the knee femur is needed according to the wear condition of the posterior condyle of the knee femur. If needed, the posterior condyle osteotomy can be directly performed for the subsequent use and installation of the posterior condyle pad prosthesis of the knee femur. The osteotomy device can be used with the femoral intramedullary nail when in use. When the intramedullary nail is inserted into the medullary cavity, for example, the bending occurs at the bending point or the distal end of the intramedullary nail is deformed due to the pressure of the medullary cavity, the bone condition can be determined according to the insertion condition, which is beneficial to provide a basis for the installation of the knee femoral extension stem prosthesis. Wherein, Figures 1 to 5 One specific embodiment is shown.

[0031] Referring to Figures 1 to 5 The multifunctional knee femur four-in-one osteotomy device comprises a guide 2, an eccentricity measurer 3, a locking pin 4 and an anterior condyle bracket 5. The four-in-one osteotomy plate 1 is provided with a locking hole matched with the guide 2 and a threaded hole matched with the locking pin 4. The axis direction of the locking hole is perpendicular to the axis direction of the threaded hole, and the threaded hole penetrates into the locking hole.

[0032] The guide 2 is arranged in the locking hole, and the guide 2 is provided with a limiting groove. The guide 2 is inserted into the locking hole, and the locking pin 4 is screwed into the threaded hole and inserted into the limiting groove to keep the position of the guide 2 relative to the osteotomy plate.

[0033] The eccentricity measurer is rotatably connected to the guide 2, and the circumferential direction of the guide 2 is provided with a first scale. The eccentricity measurer is used to measure the eccentric angle of the medullary cavity. The eccentricity measurer is also provided with an eccentricity measurement hole for inserting the intramedullary nail.

[0034] The four-in-one osteotomy plate 1 is provided with a clamping groove, and the anterior condyle bracket 5 is provided with a clamping table matched with the clamping groove. The anterior condyle bracket 5 extends along the axis direction of the locking hole, and the anterior condyle bracket 5 is provided with a second scale for measuring the distance from the anterior condyle of the femoral condyle to the distal end of the femoral condyle.

[0035] When the osteotomy device is in use, the four-in-one osteotomy plate 1 can be fixed on the distal osteotomy surface of the knee femur, and then the anterior condyle, posterior condyle, posterior slope and anterior slope of the knee femur are osteotomied. Then the guide 2 is installed on the four-in-one osteotomy plate 1, and the locking pin 4 is fixed. According to the shape of the femoral medullary cavity of the patient, the eccentricity measurer is adjusted to measure the eccentric angle and eccentric distance of the medullary cavity of the patient. Finally, the anterior condyle bracket 5 is assembled to directly measure the distance from the anterior condyle of the femoral condyle to the distal end of the femoral condyle.

[0036] By the above technical solution, the osteotomy device can be used to complete four-surface osteotomy of the knee femoral condyle, anterior condyle, anterior slope and posterior slope, and shorten the operation time. The design of the anterior condyle plate 5 can measure the distance from the anterior condyle osteotomy amount of the femoral condyle to the distal end surface of the femoral condyle, providing more intuitive and more accurate osteotomy amount for the doctor, so that the joint can better adapt to the prosthesis, which is beneficial to ensure the postoperative recovery effect. The eccentricity measurer can effectively measure the eccentric angle and eccentric distance of the femoral canal, and accurately measure the eccentric angle and eccentric distance according to the different femoral canal shapes of different patients, providing a basis for the installation of knee femoral lengthening stem prosthesis, and ensuring the operation effect. Based on the overall detachable design, the anterior condyle plate 5 can be removed during osteotomy, thereby reducing the overall weight, facilitating taking and using, and being beneficial to improve the use feeling of the operator during operation. In addition to being able to perform four-surface osteotomy of the knee femur, it can also perform osteotomy of the posterior condyle with multiple thicknesses for patients with greater posterior condyle damage of the knee joint, so as to install the knee posterior condyle spacer prosthesis, which is beneficial to ensure the stability of the prosthesis installation.

[0037] It should be noted that the ordinal numbers "first", "second" are intended to distinguish one technical feature from another technical feature, and do not have sequentiality and importance.

[0038] In one embodiment, referring to Figure 3 and Figure 5 , the anterior condyle plate 5 includes a U-shaped structure, and the ends of the U-shaped anterior condyle plate 5 are respectively provided with the clamping table; the four-in-one osteotomy plate 1 is provided with two clamping grooves corresponding to the clamping tables, which can quickly and reliably clamp the clamping tables in the clamping grooves, thereby limiting the position of the anterior condyle plate 5.

[0039] Specifically, referring to Figure 1 , the clamping table is T-shaped, and the clamping groove is an inverted T-shaped structure matched with the clamping table, which can limit the degree of freedom of the anterior condyle plate 5, so that it cannot shake along the two sides, but can only move along the extension direction of the clamping groove, which is beneficial to ensure the accuracy of the positioning of the anterior condyle plate 5, and indirectly ensure the osteotomy amount, which is beneficial to help the later artificial knee replacement surgery proceed smoothly.

[0040] In the present disclosure, referring to Figure 3 and Figure 4 , the eccentricity measurer is provided with a first eccentric hole 301 extending in a first direction and a second eccentric hole 302 extending in a second direction, the first eccentric hole 301 and the second eccentric hole 302 have the same hole diameter, and the first eccentric hole 301 and the second eccentric hole 302 partially overlap to form a measurement hole of eccentricity, wherein the axis of the first eccentric hole 301 is spaced apart from the axis of the second eccentric hole 302 by a distance D, and the size of D gradually decreases in the direction pointing to the medullary cavity.

[0041] Specifically, the maximum distance between the axis of the first eccentric hole 301 and the axis of the second eccentric hole 302 is 6 mm, and the minimum distance between the axis of the first eccentric hole 301 and the axis of the second eccentric hole 302 is 1 mm, 1 mm≤D≤6 mm. In this regard, those skilled in the art can flexibly configure according to actual needs.

[0042] In an embodiment provided by the present disclosure, the center hole side wall of the guide 2 is provided with a limiting shaft 6, and the eccentricity measuring device is provided with an annular groove 7 matched with the limiting shaft 6, and the limiting shaft 6 is inserted into the annular groove 7 to limit the degree of freedom of the eccentricity measuring device, so that the eccentricity measuring device rotates smoothly, which is beneficial to ensure the accuracy of the eccentricity angle measurement result and provide effective reference data for the installation of the knee femoral lengthening stem prosthesis.

[0043] Specifically, the limiting shaft 6 is provided with two limiting shafts, which are symmetrically arranged. This is beneficial to ensure the limiting effect of the eccentricity measuring device, so that the eccentricity measuring device can rotate smoothly around its center of rotation when rotating.

[0044] In a preferred embodiment, the guide 2 is provided with a positioning table, and the four-in-one osteotomy plate 1 is provided with a positioning groove matched with the positioning table, and the positioning table is embedded in the positioning groove, which is beneficial to quickly position the eccentricity measuring device 3 to the corresponding position of the guide 2, so that the locking pin 4 can be accurately inserted into the locking hole. Specifically, in the present disclosure, the positioning table is integrally formed with the guide 2.

[0045] In the present disclosure, the four-in-one osteotomy plate 1, the guide 2, the eccentricity measuring device 3, the locking pin 4 and the anterior condyle plate 5 are all made of medical stainless steel material. The osteotomy device made of medical stainless steel material has good corrosion resistance and good strength, which is beneficial to ensure the use effect and service life. Since the medical stainless steel material is an existing material, it will not be described in detail here.

[0046] Finally, it should be pointed out that the present application is not limited to the above-mentioned optional embodiments, and anyone can derive other various forms of products under the inspiration of the present application. The above specific embodiments should not be understood as limiting the scope of protection of the present application, and the scope of protection of the present application should be defined by the claims, and the specification can be used to interpret the claims.

Claims

1. A multifunctional knee femur quadruple osteotomy device, comprising a quadruple osteotomy plate (1) for performing osteotomy on a knee femur, characterized in that, Further comprising a guide (2), an eccentricity measurer (3), a locking pin (4) and a front condyle splint (5); the quadruple osteotomy plate (1) is provided with a locking hole matched with the guide (2) and a threaded hole matched with the locking pin (4), the axial line direction of the locking hole is perpendicular to the axial line direction of the threaded hole, and the threaded hole penetrates into the locking hole; The guide (2) is arranged in the locking hole, and the guide (2) is provided with a limiting groove; the guide (2) is inserted into the locking hole, the locking pin (4) is screwed into the threaded hole and inserted into the limiting groove, so as to keep the position of the guide (2) relative to the osteotomy plate; The eccentricity measurer is rotatably connected to the guide (2), and the circumferential direction of the guide (2) is provided with a first scale, and the eccentricity measurer is used for measuring the eccentric angle of the medullary cavity; the eccentricity measurer is further provided with an eccentricity measuring hole for inserting a medullary nail; The quadruple osteotomy plate (1) is provided with a clamping groove, the front condyle splint (5) is provided with a clamping table matched with the clamping groove, the front condyle splint (5) extends along the axial line direction of the locking hole, and the front condyle splint (5) is provided with a second scale for measuring the distance from the front condyle of the femoral condyle to the distal end of the femoral condyle. The front condyle splint (5) comprises a U-shaped structure, and the ends of the U-shaped front condyle splint (5) are respectively provided with the clamping table; the quadruple osteotomy plate (1) is provided with two clamping grooves corresponding to the clamping table; the clamping table is T-shaped, and the clamping groove is inverted T-shaped structure matched with the clamping table; The eccentricity measurer is provided with a first eccentric hole (301) extending in a first direction and a second eccentric hole (302) extending in a second direction, the first eccentric hole (301) and the second eccentric hole (302) have the same hole diameter, and the first eccentric hole (301) and the second eccentric hole (302) partially overlap to form a common eccentric measuring hole, wherein the axial line of the first eccentric hole (301) is spaced apart from the axial line of the second eccentric hole (302) by a distance D, and the size of D gradually decreases in the direction pointing to the medullary cavity.

2. The quadruple function knee femoral cutting block of claim 1, wherein, The maximum distance between the axial line of the first eccentric hole (301) and the axial line of the second eccentric hole (302) is 6mm, and the minimum distance between the axial line of the first eccentric hole (301) and the axial line of the second eccentric hole (302) is 1mm, 1mm≤D≤6mm.

3. The quadruple function knee femoral cutting block of claim 1, wherein, The center hole side wall of the guide (2) is provided with a limiting shaft (6), the eccentricity measurer is provided with an annular groove (7) matched with the limiting shaft (6), and the limiting shaft (6) is inserted into the annular groove (7) to limit the degree of freedom of the eccentricity measurer.

4. The quadruple function femoral cutting block of claim 3, wherein, The limiting shaft (6) is provided in two and symmetrically arranged.

5. The quadruple function knee femoral cutting block of claim 1, wherein, The guide (2) is provided with a positioning table, the quadruple osteotomy plate (1) is provided with a positioning groove matched with the positioning table, and the positioning table is embedded in the positioning groove.

6. The quadruple function knee femoral cutting block of claim 1, wherein, The quadruple one osteotomy plate (1), the guider (2), the eccentricity measurer (3), the lock pin (4) and the front condyle bracket (5) are all medical stainless steel materials.

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