Femoral condyle osteotomy device

Abstract

This application relates to the technical field of medical devices, and more particularly to a femoral condyle osteotomy device. The femoral condyle osteotomy device comprises a mounting body, a grinding assembly, a transmission assembly, and a positioning assembly. The grinding assembly comprises a grinding rod, the mounting body being provided with a track groove for sliding the grinding rod, the inner wall of the track groove being arc-shaped. The transmission assembly is mounted on the mounting body and is used to drive the grinding rod to rotate. The positioning assembly is connected to the mounting body and is used to position the device on the femoral condyle. This application achieves the effect of forming a prosthetic bone cross-section for the femoral condyle in one go.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a femoral condyle osteotomy device. Background Art

[0002] Knee replacement is a new treatment technique for knee joint disorders, developed following the successful use of artificial hip joints in modern patients. Knee replacement can alleviate knee pain and improve patients' quality of life. Femoral condyle replacement is a key component of knee replacement. During femoral condyle replacement, diseased or worn bone is removed to facilitate replacement of the prosthesis. The surgeon uses osteotomy instruments tailored to the patient's condition.

[0003] Traditionally, the femoral condyle prosthesis has five medial osteotomy surfaces, and five osteotomy planes need to be cut out on the femoral condyle, and the positioning osteotomy often needs to be completed in two times. The medullary cavity needs to be opened first, and the distal femoral osteotomy positioning device needs to be installed to perform the distal femoral plane osteotomy. Then the femoral four-in-one osteotomy positioning device needs to be installed to perform the four-in-one femoral plane osteotomy. During this operation, the doctor needs to disassemble and assemble the positioning osteotomy device twice. Each installation and positioning requires special care and careful observation of the position of the positioning device. There are many interference factors and the operation is cumbersome. It is very easy to cause inaccurate positioning and deviation of the osteotomy position, which can cause the prosthesis to loosen in the later stage and the operation to fail.

[0004] More importantly, the outer contour of the natural femoral condyle of the human body is an arc-like shape. Traditionally, five osteotomy planes are cut on the femoral condyle, which is bound to cause more serious bone loss in the femoral condyle. Summary of the Invention

[0005] In order to complete one-time positioning on the femoral condyle and one-time osteotomy and shaping, thereby retaining more bone mass of the patient, the present application provides a femoral condyle grinding and osteotomy device.

[0006] The femoral condyle osteotomy device provided in this application adopts the following technical solution:

[0007] A femoral condyle osteotomy device, comprising:

[0008] Install the main body;

[0009] A grinding assembly, the grinding assembly comprising a grinding rod, the mounting body being provided with a track groove for sliding the grinding rod, the inner wall profile of the track groove being arc-shaped;

[0010] a transmission assembly, the transmission assembly being disposed on the mounting body and being used to drive the grinding rod to rotate;

[0011] A positioning assembly is connected to the mounting body and is used for positioning on the femoral condyle.

[0012] By adopting the above technical solution, it is first necessary to obtain the patient's lower limb data and reconstruct the lower limb model, and then determine the landmark points of the model osteotomy, determine the osteotomy position through the anatomical landmark points, and form an osteotomy positioning component. Finally, after 3D printing, the installation body is connected to the positioning component. The transmission component is connected to an external drive device. The external drive device drives the grinding rod to rotate through the transmission component to grind and osteotomize the femoral condyle. Under the guiding and limiting action of the track groove, the grinding rod can slide along the track groove to osteotomize the femoral condyle so that it is formed with a femoral condyle cross-section that matches the inner wall contour of the prosthesis, thereby facilitating the installation of the prosthesis. The femoral condyle osteotomy device can form the femoral condyle cross-section in one time, and can retain more bone tissue in the patient compared to the osteotomy device in the related art.

[0013] Optionally, the mounting body includes a mounting plate, and side plates are bent and formed on both sides of the mounting plate, and the track groove is provided on the side plates;

[0014] Both ends of the grinding rod are provided with a first bearing, the first bearing is sleeved on the grinding rod, and the first bearing is adapted to the track groove.

[0015] By adopting the above technical solution, side plates are bent on both sides of the mounting plate to serve as the basis of the track groove, and first bearings are provided at both ends of the grinding rod, so that the grinding rod can slide more smoothly along the track groove.

[0016] Optionally, the grinding assembly further includes a hand lever, the hand lever including a gripping rod, a first connecting rod and a second connecting rod, one end of the gripping rod is detachably connected to the first connecting rod, and the other end of the gripping rod is fixedly connected to the second connecting rod;

[0017] One end of the first connecting rod away from the gripping rod is rotatably connected to one end of the grinding rod, and one end of the second connecting rod away from the gripping rod is rotatably connected to the other end of the grinding rod.

[0018] By adopting the above technical solution, when performing femoral condyle osteotomy on a patient, the doctor holds the handle with his hand and pulls the handle to slide along the track direction of the track groove, thereby driving the grinding rod to slide along the track groove to grind and osteotomize the femoral condyle.

[0019] Optionally, the transmission assembly includes a power adapter, an inner transmission rod, a first bevel gear and a second bevel gear, one end of the inner transmission rod is connected to the power adapter, the other end of the inner transmission rod is connected to the first bevel gear, and the interior of the first connecting rod is provided with a long through hole along its length for the inner transmission rod to pass through, the grinding rod is connected to the second bevel gear at one end close to the first connecting rod, and the first bevel gear is meshed with the second bevel gear.

[0020] By adopting the above technical solution, the power adapter is used to connect to an external drive device, and the external drive device drives the power adapter to rotate, the power adapter drives the internal transmission rod to rotate, the internal rotation rod drives the first bevel gear to rotate, and the first bevel gear then drives the meshing second bevel gear to rotate, so that the second bevel gear drives the grinding rod to rotate to perform osteotomy on the femoral condyle, and cooperates with the hand lever to pull the grinding rod to slide along the track groove to form the prosthesis installation cross-section of the femoral condyle in one go, avoiding the need for multiple disassembly and assembly of osteotomy instruments in related technologies, and is easy to use.

[0021] Optionally, the positioning assembly includes a positioning block and a locking piece, the positioning block is provided with a first groove, the mounting plate is provided with a connecting block that cooperates with the first groove, the bottom wall of the first groove is provided with an internal threaded hole, the connecting block is provided with a positioning hole corresponding to the internal threaded hole, and the locking piece passes through the positioning hole and cooperates with the internal threaded hole.

[0022] By adopting the above technical solution, when installing the femoral condyle osteotomy device, the positioning block is first fixed to the patient's femur, and then the connecting block on the mounting plate is clamped into the first groove on the positioning block, and the connecting block is fixedly connected to the positioning block through the locking member, thereby achieving a stable connection between the mounting body and the positioning assembly.

[0023] Optionally, the locking member includes a knob cap and a locking rod, the locking rod is connected to the knob cap, a limiting rod is provided on the inner wall of the positioning hole, a limiting ring is provided on the rod body of the locking rod, two limiting rings are provided and are spaced apart and sleeved on the locking rod, the limiting rod abuts between the two limiting rings, and the end of the locking rod away from the knob cap cooperates with the internal threaded hole.

[0024] Before performing osteotomy on the patient, it is necessary to fine-tune the distance between the installation body and the femoral condyle. By adopting the above technical solution, after the connecting block is clamped in the first groove, first screw the screw cap to make the locking rod cooperate with the internal threaded hole to connect the connecting block and the positioning block, and then screw the knob cap again according to the distance that needs to be fine-tuned. During the up and down movement of the locking rod, the limiting rod can be driven up and down by the limiting ring, so that the limiting rod can drive the connecting block to move up and down corresponding to the positioning block, and then the connecting block drives the installation body to move up and down relative to the femoral condyle to change the distance between the two, thereby adjusting the distance between the grinding rod and the femoral condyle.

[0025] Optionally, protrusions are provided on both sides of the connecting block, and a second groove is also provided on the positioning block. There are two second grooves, which are respectively located on both sides of the first groove and respectively connected to the first groove, and the protrusion cooperates with the second groove.

[0026] By adopting the above technical solution, when the connecting block is snapped into the first groove, the protrusions on both sides of the connecting block are snapped into the corresponding second grooves at the same time, which can reduce the probability of the connecting block shaking in the first groove, thereby making the installation body more stable.

[0027] Optionally, guide strips are provided on the inner walls of the two track grooves, and the two guide strips are provided in one-to-one correspondence with the two first bearings, and the side surfaces of the first bearings abut against the corresponding guide strips.

[0028] By adopting the above technical solution, when the first bearing slides in the track groove, the side wall of the first bearing abuts against the guide strip, which can reduce the probability of the first bearing being displaced during sliding, thereby allowing the grinding rod to slide stably.

[0029] Optionally, the second connecting rod is detachably connected to the grinding rod; a notch is provided on the inner wall of the track groove, and an arc-shaped chamfer is provided at the connection between the side wall of the notch and the guide strip.

[0030] By adopting the above technical solution, when the grinding rod needs to be replaced, first slide the grinding rod to the notch, then separate the grip rod and the first connecting rod, then separate the first connecting rod and the grinding rod, and finally pull the grinding rod out of the notch to remove the grinding rod, install a new grinding rod and then restore the above operations to achieve the replacement of the grinding rod. By setting the arc chamfer, the grinding rod can be pulled out smoother.

[0031] Optionally, a plurality of observation holes are provided on the mounting plate, and the plurality of observation holes are arranged at intervals on the plate surface of the mounting plate.

[0032] By adopting the above technical solution, doctors can observe the grinding of the femoral condyle by the grinding rod in real time through the observation hole, reducing the probability of accidents.

[0033] In summary, this application includes at least one of the following beneficial technical effects:

[0034] 1. Under the guidance and restriction of the track groove, the grinding rod can slide along the track groove to perform osteotomy on the femoral condyle so that it forms a femoral condyle bone cross-section that matches the contour of the inner wall of the prosthesis, thereby facilitating the installation of the prosthesis. Compared with the osteotomy device in the related art, the femoral condyle osteotomy device can form the femoral condyle bone cross-section in one go, which can preserve more bone tissue in the patient.

[0035] 2. After the connecting block is snapped into the first groove, first screw the screw cap to make the locking rod cooperate with the internal threaded hole to connect the connecting block and the positioning block, then fine-tune the distance as needed, and screw the knob cap again. During the up and down movement of the locking rod, the limiting ring can drive the limiting rod to move up and down, so that the limiting rod can drive the connecting block to move up and down corresponding to the positioning block, and then the connecting block drives the installation body to move up and down relative to the femoral condyle to change the distance between the two, and adjust the distance between the grinding rod and the femoral condyle.

[0036] 3. The doctor can observe the grinding of the femoral condyle by the grinding rod in real time through the observation hole to avoid the possibility of accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the three-dimensional structure of the femoral condyle osteotomy device in an embodiment of the present application.

[0038] Figure 2 It is a schematic diagram of the three-dimensional structure of the installation body in the embodiment of the present application.

[0039] Figure 3 It is a schematic structural diagram of the grinding rod in the embodiment of the present application.

[0040] Figure 4 It is a schematic structural diagram of the hand lever and the grinding lever in the embodiment of the present application.

[0041] Figure 5 It is a schematic cross-sectional view of the hand lever and the grinding lever in the embodiment of the present application.

[0042] Figure 6 It is a schematic diagram of the three-dimensional structure of the positioning component in the embodiment of the present application.

[0043] Figure 7 It is a schematic cross-sectional structural diagram of the positioning component in the embodiment of the present application.

[0044] Figures: 1. Mounting body; 11. Mounting plate; 111. Observation hole; 112. Connecting block; 1121. Positioning hole; 1122. Protrusion; 12. Side plate; 121. Track groove; 1211. Guide strip; 1212. Notch; 1213. Arc chamfer; 2. Grinding assembly; 21. Grinding rod; 211. First bearing; 212. Second bearing; 213. Grinding portion; 2131. Rack; 2132. Grinding ball; 2133. Grinding section; 214. Smooth section; 22. Hand lever; 221. Grip; 2211. Insert block; 222. First connecting rod; 2221. Connecting portion; 2222. Slot ;2223, long through hole;2224, first placement hole;2225, second placement hole;223, second connecting rod;3, transmission assembly;31, power adapter;32, inner transmission rod;321, third bearing;33, first bevel gear;34, second bevel gear;4, positioning assembly;41, positioning block;411, first groove;4111, internal threaded hole;412, second groove;42, locking piece;421, knob cap;422, locking rod;4221, limiting ring;423, limiting rod;43, first positioning block;431, first mounting hole;44, second positioning block;441, second mounting hole. DETAILED DESCRIPTION

[0045] The following is combined with Figure 1 To the attached Figure 7 , further details of this application are given.

[0046] Reference Figure 1 , a femoral condyle osteotomy device includes a mounting body 1, a grinding assembly 2, a transmission assembly 3 and a positioning assembly 4; the grinding assembly 2 includes a grinding rod 21, and the mounting body 1 is provided with a track groove 121 for the sliding of the grinding rod 21, and the inner wall contour of the track groove 121 is arc-shaped, the transmission assembly 3 is arranged on the mounting body 1, the transmission assembly 3 is connected to an external external driving device and is used to drive the grinding rod 21 to rotate, and the positioning assembly 4 is used for positioning and installing on the patient's femur, and the positioning assembly 4 is connected to the mounting body 1; under the guiding effect of the track groove 121 and the driving effect of the transmission assembly 3, the grinding rod 21 performs an osteotomy operation on the femoral condyle, and grinds the side of the femoral condyle to be installed with the prosthesis into an arc-shaped surface. The femoral condyle osteotomy device can form the femoral condyle cross-section at one time, which can enable the patient to retain more femoral bone.

[0047] Reference Figure 2The mounting body 1 includes a mounting plate 11, which is bent multiple times along its length to form a plurality of flat plates. In this embodiment, the mounting plate 11 is formed with five flat plates, and side plates 12 are formed by bending on both sides of the mounting plate 11 relative to each other. Two track grooves 121 are respectively opened on the side plates 12 on both sides. The inner wall contour of the track groove 121 is arc-shaped and consistent with the arc contour of the side surface of the prosthesis to be installed.

[0048] In order to facilitate the sliding of the grinding rod 21 in the track groove 121, refer to Figure 2 and Figure 3 A first bearing 211 is provided at both ends of the grinding rod 21. The two first bearings 211 are sleeved on the grinding rod 21. The first bearings 211 are adapted to the track groove 121. Under the guidance restriction of the inner wall of the track groove 121, the first bearings 211 slide along the track groove 121 to drive the grinding rod 21 to slide along the track groove 121. At the same time, the grinding rod 21 rotates around its own axis under the drive of the transmission assembly 3 to perform osteotomy on the femoral condyle.

[0049] Reference Figure 3 The grinding rod 21 includes a grinding portion 213 and smooth sections 214 fixedly mounted at both ends of the grinding portion 213. The grinding portion 213 is provided with a rack 2131 for grinding the femoral condyle. The axis of the grinding portion 213 coincides with the axis of the smooth section 214. The grinding portion 213 further includes grinding balls 2132 and grinding sections 2133 fixedly mounted on either side of the grinding balls 2132. The grinding sections 2133 are fixedly connected to the grinding balls 2132. The diameter of the connection between the grinding balls 2132 and the grinding sections 2133 gradually increases from the grinding section 2133 to the grinding balls 2132 at a gradient of 0.5 mm. When grinding the femoral condyle, the grinding balls 2132 and the grinding sections 2133 cooperate to grind and resect the femoral condyle. The increasing diameter arrangement allows for a smoother transition from the grinding sections 2133 to the grinding balls 2132.

[0050] Reference Figure 1 and Figure 4The grinding assembly 2 also includes a hand rod 22, which includes a grip rod 221 and a first connecting rod 222 and a second connecting rod 223 respectively arranged at both ends of the grip rod 221. The end surface of one end of the grip rod 221 is fixedly provided with an insert block 2211, and one end of the first connecting rod 222 is fixedly provided with a connecting portion 2221. A slot 2222 is provided on the end surface of the connecting portion 2221, and the grip rod 221 and the first connecting rod 222 are detachably connected through the interference fit of the insert block 2211 and the slot 2222. The other end of the grip rod 221 is fixedly connected to one end of the second connecting rod 223; the end of the first connecting rod 222 away from the grip rod 221 is rotatably connected to one end of the grinding rod 21, and the end of the second connecting rod 223 away from the grip rod 221 is rotatably connected to the other end of the grinding rod 21. When performing osteotomy on the femoral condyle, the doctor holds the handle 221 and pulls the grinding rod 21 to slide along the track groove 121 to grind and osteotomize the femoral condyle.

[0051] In order to improve the stability of the first bearing 211 sliding along the track groove 121, refer to Figure 1 and Figure 2 A guide strip 1211 is fixedly provided on the inner wall of each of the two track grooves 121. The guide strip 1211 is arranged in a circle along the inner wall of the track groove 121. One side of the two guide strips 1211 is flush with the inner side surface of the corresponding side plate 12. The two guide strips 1211 are provided in a one-to-one correspondence with the two first bearings 211 and are located between the two first bearings 211. In other embodiments of the present application, the two guide strips 1211 can also be provided outside the two first bearings 211. When the first bearings 211 slide in the track groove 121, the side surface of the first bearing 211 abuts against the corresponding guide strip 1211, reducing the probability of the grinding rod 21 being displaced during sliding, and further improving the sliding stability of the grinding rod 21.

[0052] In order to facilitate the replacement of the grinding rod 21, refer to Figure 2 and Figure 5A notch 1212 is provided on the inner wall of the track groove 121. The notch 1212 is provided on the side of the side plate 12 close to the mounting plate 11. The connection between the side wall of the notch 1212 and the inner wall of the track groove 121, and the connection between the side wall of the notch 1212 and the guide strip 1211 are both provided with arc chamfers 1213. By providing the arc chamfers 1213, the probability of the first bearing 211 colliding with the guide strip 1211 when the grinding rod 21 is pulled out can be reduced. The first connecting rod 222 is rotatably connected to the grinding rod 21 through the second bearing 212, and the second connecting rod 223 is rotatably connected to the grinding rod 21 by the second bearing 212, and the second bearing 212 is used to realize a detachable connection between the two. When the grinding rod 21 needs to be replaced, the grinding rod 21 is first slid to the notch 1212, and then the insert 2211 is pulled out of the slot 2222, and the grinding rod 21 and the second connecting rod 223 are separated, and finally the grinding rod 21 is pulled out from the notch 1212 to replace the grinding rod 21 with a different diameter.

[0053] Reference Figure 1 and Figure 2 A plurality of observation holes 111 are provided on the mounting plate 11, and the plurality of observation holes 111 are spaced apart on the five plane plates of the mounting plate 11. The grinding of the femoral condyle by the grinding rod 21 can be observed through the observation holes 111, thereby reducing the probability of accidents and improving the safety of femoral condyle grinding osteotomy.

[0054] Reference Figure 5 The transmission assembly 3 includes a power adapter 31, an inner transmission rod 32, a first bevel gear 33 and a second bevel gear 34. The interior of the first connecting rod 222 is provided with a long through hole 2223 for the inner transmission rod 32 to pass through. The long through hole 2223 is opened along the length direction of the first connecting rod 222. The long through hole 2223 passes through the first connecting rod 222. The power adapter 31 is connected to the external drive device, one end of the inner transmission rod 32 is fixedly connected to the power adapter 31, and the other end of the inner transmission rod 32 is fixed to the first The bevel gear 33 is fixedly connected, and the end of the grinding rod 21 closest to the first connecting rod 222 is connected to the second bevel gear 34. The first bevel gear 33 meshes with the second bevel gear 34. The end of the first connecting rod 222 away from the grip rod 221 is respectively formed with a first placement hole 2224 and a second placement hole 2225. The first placement hole 2224 and the second placement hole 2225 are connected. The first placement hole 2224 is used to place the first bevel gear 33, and the second placement hole 2225 is used to place the second bevel gear 34. When the external drive device is activated, the power adapter 31 is rotated, which in turn drives the internal transmission rod 32 to rotate. The internal transmission rod 32 in turn drives the first bevel gear 33 to rotate. The first bevel gear 33 drives the second bevel gear 34 meshing therewith to rotate, thereby driving the grinding rod 21 to rotate and perform the osteotomy operation on the femoral condyle.

[0055] In this embodiment, in order to facilitate the rotation of the inner transmission rod 32, refer to Figure 5 A number of third bearings 321 are provided on the rod body of the inner transmission rod 32, and the outer side surface of the third bearing 321 is fixedly connected to the inner wall of the long through hole 2223. By providing the third bearing 321, the rotation of the inner transmission rod 32 is facilitated while also improving its rotation stability.

[0056] Reference Figure 2 and Figure 6 The positioning assembly 4 includes a positioning block 41 and a locking piece 42. The positioning block 41 is provided with a first groove 411, and the mounting plate 11 is provided with a connecting block 112 that matches the first groove 411. The bottom wall of the first groove 411 is provided with an internal threaded hole 4111, and the connecting block 112 is provided with a positioning hole 1121 corresponding to the internal threaded hole 4111. When the connecting block 112 is placed in the first groove 411, the positioning hole 1121 corresponds to the internal threaded hole 4111, and the locking piece 42 passes through the positioning hole 1121 and matches the internal threaded hole 4111 to connect the connecting block 112 to the positioning block 41. The side surface of the positioning block 41 that abuts against the femoral condyle matches the surface structure of the femoral condyle, so that the positioning block 41 can fit better when installed on the femoral condyle. Before the doctor performs the osteotomy operation, the positioning block 41 is positioned and fixed on the patient's femoral condyle, which can improve the stability of the femoral condyle osteotomy.

[0057] Reference Figure 2 and Figure 7 The locking member 42 includes a knob cap 421 and a locking rod 422. The locking rod 422 is fixedly connected to the knob cap 421. A limiting rod 423 is fixedly provided on the inner wall of the positioning hole 1121. The length direction of the limiting rod 423 is perpendicular to the axial direction of the positioning hole 1121. A limiting ring 4221 is fixedly provided on the rod body of the locking rod 422. Two limiting rings 4221 are provided and are spaced apart and sleeved on the locking rod 422. One end of the limiting rod 423 away from the inner wall of the positioning hole 1121 abuts between the two limiting rings 4221, and one end of the locking rod 422 away from the knob cap 421 is screwed into the internal threaded hole 4111.

[0058] Reference Figure 1 and Figure 7 After the positioning block 41 is positioned and fixed on the femoral condyle, the mounting body 1 is fixedly connected to the positioning block 41 by screwing the locking piece 42. When the mounting body 1 needs to be fine-tuned up and down, the locking piece 42 is screwed again, and the limiting ring 4221 moves up and down to drive the limiting rod 423 to move, so that the limiting rod 423 drives the mounting body 1 to move up and down, adjusts the distance between the grinding rod 21 and the femoral condyle, and adjusts the amount of osteotomy of the femoral condyle.

[0059] In order to enhance the connection stability between the connecting block 112 and the positioning block 41, refer to Figure 2 and Figure 6 , protrusions 1122 are fixedly provided on both sides of the connecting block 112, and the positioning block 41 is also provided with two second grooves 412. The two second grooves 412 are provided, and the two second grooves 412 are respectively located on both sides of the first groove 411 and are connected to the first groove 411. The first groove 411 and the second groove 412 are located on the same side of the positioning block 41, and the protrusions 1122 snap-fit ​​with the corresponding second grooves 412. When the connecting block 112 is installed in the first groove 411, the two protrusions 1122 snap-fit ​​into the corresponding second grooves 412, reducing the possibility of shaking of the installation body 1 during the femoral condyle osteotomy process and enhancing the safety and stability of the femoral condyle osteotomy.

[0060] Reference Figure 6 In this embodiment, the positioning block 41 is fixed to the femoral condyle by bolts. The positioning block 41 includes a first positioning block 43 and a second positioning block 44. The first positioning block 43 is fixedly connected to the second positioning block 44. The first groove 411 and the second groove 412 are both opened on the first positioning block 43. In order to improve the installation stability of the positioning block 41 and the femoral condyle, a plurality of first mounting holes 431 are opened on the first positioning block 43. The axial directions of the plurality of first mounting holes 431 are all inclined to the thickness direction of the first positioning block 43, and the second positioning block 44 is also provided with a plurality of second mounting holes 441. The axial direction of the second mounting holes 441 is parallel to the thickness direction of the second positioning block 44. By providing the first mounting holes 431 and the second mounting holes 441, the bolts can be screwed into the femoral condyle at different angles during connection, thereby reducing the probability of displacement of the positioning block 41 and the femoral condyle.

[0061] The implementation principle of the embodiment of the present application is as follows: when performing femoral condyle osteotomy on a patient, the installation position of the positioning block 41 is first determined according to the patient's condition, and then the mounting plate 11 is installed on the positioning block 41. The distance between the mounting body 1 and the femoral condyle can be fine-tuned by cooperating with the limiting ring 4221 on the locking rod 422 and the limiting rod 423 in the positioning hole 1121; the doctor holds the gripping rod 221 and pulls the grinding rod 21 to slide along the track groove 121, and drives the grinding rod 21 to rotate through an external driving device connected to the transmission assembly 3. While the grinding rod 21 slides, it rotates to grind and osteotomize the femoral condyle. Under the restriction of the track groove 121, the femoral condyle osteotomy device can form the installation cross-section of the prosthesis on the femoral condyle at one time, and more femoral bone of the patient is retained.

[0062] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A femoral condyle osteotomy device, characterized in that: include: A mounting body (1); a grinding assembly (2), wherein the grinding assembly (2) includes a grinding rod (21); a track groove (121) for sliding the grinding rod (21) is provided on the mounting body (1); the inner wall profile of the track groove (121) is arc-shaped; a transmission assembly (3), wherein the transmission assembly (3) is provided on the mounting body (1) and is used to drive the grinding rod (21) to rotate; a positioning assembly (4), wherein the positioning assembly (4) is connected to the mounting body (1) and is used to position the grinding rod on the femoral condyle; The mounting body (1) comprises a mounting plate (11), and side plates (12) are respectively bent on both sides of the mounting plate (11), and the track groove (121) is provided on the side plates (12); both ends of the grinding rod (21) are provided with a first bearing (211), the first bearing (211) is sleeved on the grinding rod (21), and the first bearing (211) is adapted to the track groove (121); The grinding assembly (2) further comprises a hand lever (22), the hand lever (22) comprising a gripping lever (221), a first connecting lever (222) and a second connecting lever (223), one end of the gripping lever (221) being detachably connected to the first connecting lever (222), and the other end of the gripping lever (221) being fixedly connected to the second connecting lever (223); one end of the first connecting lever (222) away from the gripping lever (221) being rotatably connected to one end of the grinding lever (21), and one end of the second connecting lever (223) away from the gripping lever (221) being rotatably connected to the other end of the grinding lever (21); The transmission assembly (3) comprises a power adapter (31), an inner transmission rod (32), a first bevel gear (33) and a second bevel gear (34); one end of the inner transmission rod (32) is connected to the power adapter (31); the other end of the inner transmission rod (32) is connected to the first bevel gear (33); a long through hole (2223) for the inner transmission rod (32) to pass through is provided inside the first connecting rod (222) along its length direction; one end of the grinding rod (21) close to the first connecting rod (222) is connected to the second bevel gear (34); and the first bevel gear (33) is meshed with the second bevel gear (34).

2. A femoral condyle osteotomy device according to claim 1, characterized in that: The positioning assembly (4) includes a positioning block (41) and a locking member (42), wherein the positioning block (41) is provided with a first groove (411), and the mounting plate (11) is provided with a connecting block (112) that matches the first groove (411), and an internal threaded hole (4111) is provided on the bottom wall of the first groove (411), and the connecting block (112) is provided with a positioning hole (1121) corresponding to the internal threaded hole (4111), and the locking member (42) passes through the positioning hole (1121) and matches the internal threaded hole (4111).

3. The femoral condyle osteotomy device according to claim 2, characterized in that: The locking member (42) comprises a knob cap (421) and a locking rod (422), wherein the locking rod (422) is connected to the knob cap (421), a limiting rod (423) is provided on the inner wall of the positioning hole (1121), and a limiting ring (4221) is provided on the rod body of the locking rod (422), two limiting rings (4221) are provided and are spaced apart and sleeved on the locking rod (422), the limiting rod (423) abuts between the two limiting rings (4221), and one end of the locking rod (422) away from the knob cap (421) is matched with the internal threaded hole (4111).

4. The femoral condyle osteotomy device according to claim 3, characterized in that: Both sides of the connecting block (112) are provided with protrusions (1122), and the positioning block (41) is further provided with a second groove (412). Two second grooves (412) are provided, and the two second grooves (412) are respectively located on both sides of the first groove (411) and are respectively connected to the first groove (411), and the protrusions (1122) cooperate with the second grooves (412).

5. The femoral condyle osteotomy device according to claim 1, characterized in that: A guide strip (1211) is provided on the inner wall of each of the two track grooves (121). The two guide strips (1211) are provided in one-to-one correspondence with the two first bearings (211), and the side surfaces of the first bearings (211) abut against the corresponding guide strip (1211).

6. The femoral condyle osteotomy device according to claim 5, characterized in that: The second connecting rod (223) is detachably connected to the grinding rod (21); a notch (1212) is provided on the inner wall of the track groove (121), and an arc chamfer (1213) is provided at the connection between the side wall of the notch (1212) and the guide strip (1211).

7. The femoral condyle osteotomy device according to claim 1, characterized in that: A plurality of observation holes (111) are provided on the mounting plate (11), and the plurality of observation holes (111) are arranged at intervals on the surface of the mounting plate (11).

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