Osteotomy device and distal femoral osteotomy block thereof

Abstract

The osteotomy device and the distal femoral osteotomy block provided by the present invention include a main body, a first osteotomy part and a second osteotomy part, the main body having a first side surface and a second side surface arranged opposite to each other, the first osteotomy part extending toward the side where the first side surface is located, and the second osteotomy part extending toward the side where the second side surface is located, wherein the first osteotomy part includes a first positioning boss and a first osteotomy groove, the first osteotomy groove is located on the side of the first positioning boss facing away from the main body, the second osteotomy part includes a second positioning boss and a second osteotomy groove, the second osteotomy groove is located on the side of the second positioning boss facing away from the main body, and the distance h2 from the second osteotomy groove to the second positioning boss is greater than or less than the distance h1 from the first osteotomy groove to the first positioning boss, thereby utilizing the first osteotomy groove and the second osteotomy groove to meet the osteotomy guide of various osteotomy amounts, reducing the number of operations to replace osteotomy tools, and simplifying the osteotomy operation.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, in particular to an osteotomy device and a distal femoral osteotomy block thereof. Background Art

[0002] During unicompartmental knee replacement surgery, distal femoral osteotomy is typically performed using a distal femoral osteotomy block and a distal femoral osteotomy positioning tool. The thickness of the distal femoral osteotomy is generally consistent with the thickness of the distal femoral condyle prosthesis from various manufacturers. This means that when the distal femoral condyle prosthesis has varying thicknesses, distal femoral osteotomy blocks of varying thicknesses are required to complete the distal femoral osteotomy.

[0003] However, the traditional distal femoral osteotomy block, after being positioned relative to the femur by the distal femoral osteotomy positioning tool, can only provide a single osteotomy thickness. That is, one distal femoral osteotomy block can only be used for one osteotomy. When osteotomies of different thicknesses are required, distal femoral osteotomy blocks of different specifications need to be replaced. During the actual surgical operation, after the femur is osteotomed using the traditional distal femoral osteotomy block, the osteotomy thickness may be insufficient. In this case, a supplementary osteotomy block is required for supplementary osteotomy. The supplementary osteotomy block is used to continue osteotomy of the femur based on the osteotomy surface formed by the initial osteotomy of the distal femur. Due to the different degrees of wear on the distal femur and the size differences between different prostheses, in order to achieve accurate osteotomy of the femur, at least two distal femoral osteotomy blocks of different sizes and supplementary osteotomy blocks are required. This is not only not conducive to the storage of osteotomy tools, but also requires the operator to frequently change tools, which is extremely inconvenient. Summary of the Invention

[0004] Based on this, the present invention provides a distal femoral osteotomy block with a compact structure and easy operation, and an osteotomy device including the distal femoral osteotomy block.

[0005] On the one hand, the present invention provides a distal femoral osteotomy block, comprising a main body, a first osteotomy portion and a second osteotomy portion, the main body having a first side surface and a second side surface arranged opposite to each other, the first osteotomy portion extending toward the side where the first side surface is located, and the second osteotomy portion extending toward the side where the second side surface is located, wherein the first osteotomy portion comprises a first positioning boss and a first osteotomy groove, the first osteotomy groove being located on the side of the first positioning boss facing away from the main body, the second osteotomy portion comprising a second positioning boss and a second osteotomy groove, the second osteotomy groove being located on the side of the second positioning boss facing away from the main body, and the distance h2 from the second osteotomy groove to the second positioning boss being greater than or less than the distance h1 from the first osteotomy groove to the first positioning boss.

[0006] In one embodiment, the first osteotomy part and the second osteotomy part are respectively connected to two ends of the main body.

[0007] In one embodiment, the main body is provided with a mounting groove, and the mounting groove passes through the first side surface and the second side surface in a direction parallel to the first osteotomy groove. The cross section of the mounting groove is mirror-symmetrical with respect to a reference plane, and the reference plane is parallel to the first osteotomy groove and the second osteotomy groove.

[0008] In one embodiment, the distance from the first osteotomy groove to the reference plane is greater than or less than the distance from the second osteotomy groove to the reference plane.

[0009] In one embodiment, the mounting groove is a non-circular groove.

[0010] In one embodiment, the mounting groove has a groove top wall and a groove bottom wall that are arranged opposite to each other, the groove top wall and the groove bottom wall are parallel to each other, and the distance H1 from the first osteotomy groove to the groove top wall is greater than or less than the distance H2 from the second osteotomy groove to the groove bottom wall.

[0011] In one embodiment, the distance h1 from the first osteotomy groove to the first positioning boss, the distance h2 from the second osteotomy groove to the second positioning boss, the distance H1 from the first osteotomy groove to the groove top wall, and the distance H2 from the second osteotomy groove to the groove bottom wall are not equal to each other.

[0012] In one embodiment, the distance h1 from the first osteotomy groove to the first positioning boss and the distance h2 from the second osteotomy groove to the second positioning boss are in the range of 1 mm to 3 mm, and / or the distance H1 from the first osteotomy groove to the top wall of the groove and the distance H2 from the second osteotomy groove to the bottom wall of the groove are in the range of 5 mm to 8 mm.

[0013] In one embodiment, both the first osteotomy part and the second osteotomy part are provided with fixing holes, and the distances from the fixing holes on the first osteotomy part and the fixing holes on the second osteotomy part to the reference plane are equal.

[0014] In one embodiment, the fixing hole on the first osteotomy part and the fixing hole on the second osteotomy part are mirrored with respect to the reference plane.

[0015] In one embodiment, a distance d1 from the fixing hole on the first osteotomy part to the first positioning boss is equal to a distance d2 from the fixing hole on the second osteotomy part to the second positioning boss.

[0016] On the other hand, the present invention provides an osteotomy device, comprising a distal femoral positioning block and the distal femoral osteotomy block described above, wherein the distal femoral positioning block is detachably connected to the distal femoral osteotomy block.

[0017] In one embodiment, the distal femoral positioning block includes a mounting portion for cooperating with the mounting slot and a supporting portion for abutting against the femur, and the upper surface of the mounting portion is coplanar with the upper surface of the supporting portion.

[0018] In one embodiment, the distal femoral positioning block includes a connecting portion, and when the femur is connected to one of the first osteotomy portion and the second osteotomy portion, the connecting portion is used to connect to the other of the first osteotomy portion and the second osteotomy portion.

[0019] The osteotomy device and the distal femoral osteotomy block provided by the present invention include a main body, a first osteotomy part and a second osteotomy part, the first osteotomy part including a first positioning boss and a first osteotomy groove, the second osteotomy part including a second positioning boss and a second osteotomy groove, the first osteotomy groove being located on the side of the first positioning boss facing away from the main body, the second osteotomy groove being located on the side of the second positioning boss facing away from the main body, and the distance from the second osteotomy groove to the second positioning boss being greater than or less than the distance from the first osteotomy groove to the first positioning boss. In this way, when the first osteotomy groove and the second osteotomy groove are used as osteotomy tool guides for osteotomy, different osteotomy amounts can be obtained, thereby meeting the osteotomy guide for a variety of osteotomy amounts, reducing the number of operations to replace osteotomy tools, and simplifying the osteotomy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying any creative work, they can also obtain drawings of other embodiments based on these drawings.

[0021] Figure 1 A schematic structural diagram of a distal femoral osteotomy block according to an embodiment;

[0022] Figure 2 for Figure 1 A schematic structural diagram of the distal femoral osteotomy block from another perspective is shown;

[0023] Figure 3 for Figure 1 A schematic structural diagram of the distal femoral osteotomy block from another perspective is shown;

[0024] Figure 4 for Figure 1 A schematic side view of the distal femoral osteotomy block is shown;

[0025] Figure 5 A schematic diagram of a femoral osteotomy operation using a distal femoral osteotomy block in combination with a distal femoral positioning block according to an embodiment of the present invention;

[0026] Figure 6 Schematic diagram of a supplementary osteotomy operation using a distal femoral osteotomy block according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0030] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0031] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0033] Combine Figure 1 and Figure 2 As shown, a distal femoral osteotomy block 10 provided by the present invention includes a main body portion 1, a first osteotomy portion 2 and a second osteotomy portion 3.

[0034] The main body 1 serves as a carrier for the first osteotomy part 2 and the second osteotomy part 3 , and has a first side surface 11 and a second side surface 12 that are arranged opposite to each other.

[0035] It should be noted that the distal femoral osteotomy block 10 can be a one-piece structure, that is, the main body 1, the first osteotomy portion 2, and the second osteotomy portion 3 are integrally formed. In other embodiments, the main body 1, the first osteotomy portion 2, and the second osteotomy portion 3 can be separate components that are fixed together by means of clamping, bonding, or welding.

[0036] Continue reading Figure 1 and Figure 2 As shown, the first osteotomy portion 2 and the second osteotomy portion 3 are respectively connected to the two ends of the main body 1, with the first osteotomy portion 2 extending toward the side where the first side surface 11 is located, and the second osteotomy portion 3 extending toward the side where the second side surface 12 is located. In other words, the first osteotomy portion 2 and the second osteotomy portion 3 extend toward different sides relative to the main body 1, thereby protruding from the first side surface 11 and the second side surface 12, respectively.

[0037] Figure 1 and Figure 2In the embodiment shown in , the first osteotomy section 2 and the second osteotomy section 3 are respectively connected to the upper and lower ends of the main body 1. In other embodiments, the first osteotomy section 2 and the second osteotomy section 3 can be located at both the upper and lower ends of the main body 1. In embodiments where the first osteotomy section 2 and the second osteotomy section 3 are connected to the same end of the main body 1, the osteotomy grooves of the first osteotomy section 2 and the second osteotomy section 3 are connected. Preferably, the first osteotomy section 2 and the second osteotomy section 3 are respectively connected to the two ends of the main body 1. In this way, when one osteotomy section is used for osteotomy, it will not be interfered with by the other osteotomy section, making the operation more convenient.

[0038] The first osteotomy portion 2 includes a first positioning boss 21 and a first osteotomy groove 22. The first osteotomy groove 22 is located on the side of the first positioning boss 21 facing away from the main body 1. The side of the first positioning boss 21 facing away from the main body 1 is a first positioning surface 21a, which is used to abut against the osteotomy surface B2 of the distal femur. The first positioning surface 21a is a plane parallel to the first osteotomy groove 22 to ensure that the osteotomy surface of the supplementary osteotomy is parallel to the osteotomy surface of the initial osteotomy. Preferably, the back side of the first positioning surface 21a is also parallel to the first osteotomy groove 22, which facilitates the placement of the first positioning boss 21 on the distal femur positioning block 20.

[0039] See Figure 6 As shown, when the femur B is supplemented with osteotomy using the distal femoral osteotomy block 10, the osteotomy surface B2 formed by the osteotomy of the femur B can be placed against the first positioning surface 21a of the first positioning boss 21, and the osteotomy tool can pass through the first osteotomy groove 22 to perform supplementary osteotomy on the femur B.

[0040] The second osteotomy portion 3 includes a second positioning boss 31 and a second osteotomy groove 32. The second osteotomy groove 32 is located on the side of the second positioning boss 31 facing away from the main body 1. This allows the osteotomy surface B2 formed by osteotomy of the femur B to abut against the second positioning surface 31a of the second positioning boss 31. The osteotomy tool can pass through the second osteotomy groove 32 to perform additional osteotomy on the femur B. The shape of the second positioning boss 31 is preferably similar to that of the first positioning boss 21.

[0041] It should be noted that, when the distal femoral osteotomy block 10 is passed through the distal femoral positioning block 20 (see Figure 5 After the first osteotomy groove 22 or the second osteotomy groove 32 relative to the osteotomy position of the femur B is used to guide the osteotomy tool to perform the initial osteotomy operation. If the osteotomy thickness corresponding to the initial osteotomy operation is insufficient, it is necessary to use the osteotomy surface B2 formed by the initial osteotomy at the distal end of the femur B as a new reference benchmark to continue the osteotomy operation, that is, to perform a supplementary osteotomy operation, so that the overall osteotomy amount of the distal end of the femur B finally meets the installation and use requirements of the prosthesis of corresponding specifications.

[0042] When performing supplementary osteotomy on the femur B, the amount of osteotomy for the supplementary osteotomy is the thickness of the femur B that is cut off again on the basis of the osteotomy surface B2 formed by the initial osteotomy.

[0043] In some embodiments, when supplementary osteotomy is performed using the distal femoral osteotomy block 10 of this embodiment, the osteotomy surface B2 formed by the initial osteotomy of the distal end of the femur B is placed against the first positioning surface 21a or the second positioning surface 31a, and then the osteotomy tool is moved along the first osteotomy groove 22 or the second osteotomy groove 32 corresponding to the femur B to continue osteotomizing the femur B, so that the amount of osteotomy for supplementary osteotomy is the distance from the osteotomy tool to the corresponding first positioning surface 21a or the second positioning surface 31a when the supplementary osteotomy is performed on the femur B. Since the osteotomy tool completes the corresponding osteotomy operation under the guidance of the first osteotomy groove 22 or the second osteotomy groove 32, the amount of osteotomy for supplementary osteotomy is related to the distance from the first osteotomy groove 22 or the second osteotomy groove 3 to the corresponding first positioning surface 21a or the second positioning surface 31a.

[0044] Combine Figure 3 and Figure 6 As shown, when the first osteotomy part 2 is used to perform supplementary osteotomy on the distal end of the femur B, the osteotomy surface B2 formed by the osteotomy of the femur B abuts against the first positioning surface 21a of the first positioning boss 21. The osteotomy amount of the supplementary osteotomy performed by the first positioning boss 21 in cooperation with the first osteotomy groove 22 is the vertical distance from the groove wall of the first osteotomy groove 22 away from the first positioning surface 21a to the first positioning surface 21a, that is, taking the groove wall of the first osteotomy groove 22 away from the first positioning surface 21a as a reference, the osteotomy amount of the supplementary osteotomy is the distance h1 from the first osteotomy groove 22 to the first positioning boss 21.

[0045] Correspondingly, when the second osteotomy part 3 is used to perform supplementary osteotomy on the distal end of the femur B, since the osteotomy surface B2 formed by the osteotomy of the femur B needs to abut against the second positioning surface 31a of the second positioning boss 31, the osteotomy amount corresponding to the supplementary osteotomy when the osteotomy tool performs supplementary osteotomy along the second osteotomy groove 32 is the distance h2 from the second osteotomy groove 32 to the second positioning boss 31 (same as above, it refers to the vertical distance from the groove wall of the second osteotomy groove 32 away from the second positioning surface 31a to the second positioning boss 31. Unless otherwise specified below, the distance from the osteotomy groove to a certain surface refers to the vertical distance between the two).

[0046] The distance h2 from the second osteotomy groove 32 to the second positioning boss 31 is greater or less than the distance h1 from the first osteotomy groove 22 to the first positioning boss 21. Thus, the amount of osteotomy performed on the femur B using the first osteotomy portion 2 and the second osteotomy portion 3 is different. In other words, the distal femoral osteotomy block 10 of this embodiment can accommodate osteotomy needs in a wider range of sizes, thereby reducing the number of times the osteotomy tool needs to be replaced during the distal femoral B osteotomy operation, making the distal femoral B osteotomy operation more concise.

[0047] It should be noted that the amount of osteotomy for the supplementary osteotomy operation on femur B can be 1mm, 2mm or 3mm, so that the distance from the first osteotomy groove 22 or the second osteotomy groove 32 to the corresponding first positioning boss 21 or the second positioning boss 31 can be configured according to the supplementary osteotomy operation to meet the needs of different osteotomy amounts.

[0048] Based on this, the distance h1 from the first osteotomy groove 22 to the first positioning boss 21 can range from 1mm to 3mm, and the distance h2 from the second osteotomy groove 32 to the second positioning boss 31 can also range from 1mm to 3mm, and h1 is greater than or less than h2.

[0049] For example, in some embodiments, the distance h1 from the first osteotomy groove 22 to the first positioning boss 21 is 1 mm, and the distance h2 from the second osteotomy groove 32 to the second positioning boss 31 is 2 mm or 3 mm. Thus, when the amount of supplementary osteotomy required for the distal femur B is 1 mm, the first osteotomy portion 2 can be used to perform the supplementary osteotomy. Correspondingly, when the distance h2 from the second osteotomy groove 32 to the second positioning boss 31 is 2 mm, the second osteotomy portion 3 can be used to meet the osteotomy requirement of 2 mm for the supplementary osteotomy of the distal femur B.

[0050] For example, in some other embodiments, the distance h1 from the first osteotomy groove 22 to the first positioning boss 21 is 3 mm, and the distance h2 from the second osteotomy groove 32 to the second positioning boss 31 is 1.5 mm or 2.5 mm, which can also meet the needs of different supplementary osteotomy amounts.

[0051] The amount of supplemental osteotomy for the first and second osteotomy sections 2, 3 can be other than those described in detail herein. Regarding the size configuration of the first and second osteotomy sections 2, 3 of the distal femoral osteotomy block 10, as long as the distance h2 from the second osteotomy groove 32 to the second positioning boss 31 is different from the distance h1 from the first osteotomy groove 22 to the first positioning boss 21, the distal femoral osteotomy block 10 can accommodate supplemental osteotomies of different sizes.

[0052] Because the first and second osteotomy sections 2 and 3 of the distal femoral osteotomy block 10 are respectively provided with first and second osteotomy grooves 22 and 32, the first and second osteotomy grooves 22 and 32 can be used to guide the osteotomy tool during the osteotomy operation, thereby accommodating the need for performing the initial osteotomy of the distal femur B. Furthermore, because the first and second osteotomy sections 2 and 3 extend in different directions relative to the main body 1, when one osteotomy section guides the osteotomy tool, the other osteotomy section will not interfere with the femur B and tibia near the knee joint.

[0053] Combine Figure 1 and Figure 5 As shown, the main body 1 is provided with a mounting groove 13, which extends through the first side surface 11 and the second side surface 12 in a direction parallel to the first osteotomy groove 22. In this way, the mounting groove 13 can be used to cooperate with the distal femoral positioning block 20, so that the distal femoral positioning block 20 can be used to determine the position of the distal femoral osteotomy block 10 relative to the femur B, thereby allowing the first osteotomy groove 22 or the second osteotomy groove 32 of the distal femoral osteotomy block 10 to guide the osteotomy tool to perform osteotomy.

[0054] Combine Figure 4 As shown in FIG5 , the cross section of the mounting groove 13 is a mirror image with reference plane S as the plane of symmetry, and the reference plane S is parallel to the first osteotomy groove 22 and the second osteotomy groove 32. As long as the cross section of the groove wall of the mounting groove 13 (the cross section parallel to the extension direction of the first side 11) satisfies the requirement of being a mirror image with reference plane S as the plane of symmetry, it can be any regular or irregular figure, such as rectangle, circle, semicircle, ellipse, oblong (the figure composed of two semicircles at two ends), I-shaped, cross-shaped, star-shaped, diamond-shaped or the like, and for preventing the distal femur osteotomy block 10 from rotating circumferentially, a non-circular figure is preferred. Because the mounting groove 13 is a mirror image with reference plane S as the plane of symmetry, the distal femur osteotomy block 10 can directly cooperate with the distal femur positioning block 20 after flipping, without moving or replacing the distal femur positioning block 20, and still has good coordination stability between the mounting groove 13 and the distal femur positioning block 20.

[0055] Below Figure 4 The case where the mounting groove 13 is an I-shaped groove is used as an example for explanation, but the following description is applicable to all cases of mounting grooves 13 having a pair of parallel sides, such as rectangles, crosses, hexagons, and irregular shapes having a pair of parallel sides.

[0056] For ease of description, combined Figure 4 As shown, the side wall of the mounting groove 13 close to the first positioning boss 21 is called the "groove top wall 13a", and the side wall of the mounting groove 13 close to the second positioning boss 31 is called the "groove bottom wall 13b".

[0057] Since the first positioning boss 21 and the second positioning boss 31 are located at opposite ends of the main body 1, and the mounting groove 13 extends through the first side surface 11 and the second side surface 12 in a direction parallel to the first osteotomy groove 22, the top wall 13a and the bottom wall 13b of the mounting groove 13 are arranged opposite each other in a direction perpendicular to the first osteotomy groove 22. It should be noted that the top wall 13a and the bottom wall 13b are parallel to each other and parallel to the plane of the first osteotomy groove 22 and the plane of the second osteotomy groove 32.

[0058] refer to Figure 5The distal femoral positioning block 20 cooperates with the mounting groove 13 to position the distal femoral osteotomy block 10 relative to the femur B at the osteotomy position. The distal articular surface B1 of the femur B abuts against the distal femoral positioning block 20. Therefore, the vertical distance between the surface where the distal femoral positioning block 20 abuts against the femur B (hereinafter referred to as the "abutment surface 201") and the first osteotomy groove 22 is the osteotomy amount. Since in this embodiment, when the distal femoral positioning block 20 cooperates with the mounting groove 13, the abutment surface 201 is coplanar with the groove top wall 13a or the groove bottom wall 13b, the osteotomy amount of the initial osteotomy operation can be measured by the distance from the first osteotomy groove 22 to the groove top wall 13a or the distance from the second osteotomy groove 32 to the groove bottom wall 13b. If the abutment surface 201 is not coplanar with the slot top wall 13a or the slot bottom wall 13b, the osteotomy amount of the initial osteotomy operation can be measured by the distance from the first osteotomy slot 22 to the reference plane S or the distance from the second osteotomy slot 32 to the reference plane S.

[0059] For example, combined with Figure 4 and Figure 5 As shown, when the osteotomy tool is guided by the first osteotomy groove 22 of the first osteotomy portion 2 to perform the initial osteotomy operation, the top wall 13a of the mounting groove 13 is located above the bottom wall 13b. After the distal femoral positioning block 20 is engaged with the mounting groove 13, the distal articular surface B1 of the femur B is abutted against the distal femoral positioning block 20. Specifically, the surface of the distal femoral positioning block 20 that contacts the femur B is in contact with the top wall 13a of the mounting groove 13. At this time, the distance H1 from the first osteotomy groove 22 to the top wall 13a is the osteotomy amount of the initial osteotomy operation.

[0060] Accordingly, when the second osteotomy groove 32 of the second osteotomy part 3 is used to guide the osteotomy tool to perform the initial osteotomy operation, the distance H2 from the second osteotomy groove 32 to the groove bottom wall 13b is the osteotomy amount of the initial osteotomy operation.

[0061] The amount of osteotomy performed by guiding the osteotomy tool for the initial osteotomy using the corresponding first osteotomy groove 22 or second osteotomy groove 32 on the distal femoral osteotomy block 10 can be configured according to the thickness of the distal end of the femoral prosthesis B, so that after the osteotomy operation on the distal end of the femur B, it can adapt to the installation of a femoral prosthesis of corresponding specifications.

[0062] In some embodiments, the first osteotomy groove 22 of the first osteotomy portion 2 guides the osteotomy tool to perform an initial osteotomy on the femur B, with the osteotomy amount being 5 mm to 8 mm. That is, the distance H1 from the first osteotomy groove 22 to the groove top wall 13a is in the range of 5 mm to 8 mm, such as 5 mm, 6 mm, 7 mm, or 8 mm. The distance H2 from the second osteotomy groove 32 to the groove top wall 13a is in the range of 5 mm to 8 mm, such as 5 mm, 6 mm, 7 mm, or 8 mm.

[0063] In some embodiments, the distance H1 from the first osteotomy groove 22 to the groove top wall 13a is greater or less than the distance H2 from the second osteotomy groove 32 to the groove bottom wall 13b. In other words, H1 and H2 are not equal, so that the distal femoral osteotomy block 10 having the first osteotomy portion 2 and the second osteotomy portion 3 can meet the needs of osteotomy operations with different osteotomy amounts on the distal end of the femur B. It is easy to understand that in this case, the distance from the first osteotomy groove 22 to the reference plane S is greater or less than the distance from the second osteotomy groove 32 to the reference plane S.

[0064] It should be noted that after using the first osteotomy groove 22 to guide the osteotomy tool to perform the initial osteotomy operation, if the osteotomy thickness is not enough, a supplementary osteotomy operation can be performed. When the distal femoral osteotomy block 10 of the present invention is used to guide the osteotomy tool to perform osteotomy on the femur B, the needs of supplementary osteotomy of various sizes can be met.

[0065] Specifically, during the supplementary osteotomy operation, the osteotomy surface B2 of the femur B can be aligned with the first positioning surface 21a of the first positioning boss 21, or the osteotomy surface B2 of the femur B can be aligned with the second positioning surface 31a of the second positioning boss 31, so as to guide the osteotomy tool to perform supplementary osteotomy on the femur B through the corresponding first osteotomy groove 22 or the second osteotomy groove 32; or the osteotomy surface B2 of the femur B can be aligned with the distal femoral positioning block 20, and the osteotomy tool can continue the osteotomy operation along the first osteotomy groove 22 or the second osteotomy groove 32 opposite to the femur B.

[0066] As described above, when the distance h1 between the first osteotomy groove 22 and the first positioning boss 21, the distance h2 between the second osteotomy groove 32 and the second positioning boss 31, the distance H1 between the first osteotomy groove 22 and the groove top wall 13a, and the distance H2 between the second osteotomy groove 32 and the groove bottom wall 13b are not equal, four different supplementary osteotomy thicknesses can be obtained through the above four supplementary osteotomy operations. Therefore, the distal femoral osteotomy block 10 of the present invention can flexibly adapt to the osteotomy requirements of different osteotomy amounts on the femur B, reduce the number of osteotomy tool changes during the osteotomy operation, and make the osteotomy operation more convenient.

[0067] Continue reading Figure 4 As shown, both the first osteotomy portion 2 and the second osteotomy portion 3 are provided with fixing holes for passing fixing members through, so that the fixing members can secure the distal femoral osteotomy block 10 to the femur B, thereby preventing the distal femoral osteotomy block 10 from loosening relative to the femur B and affecting the accuracy of the osteotomy tool's osteotomy position. The fixing members can be screws or positioning pins, which are not limited here.

[0068] For ease of description, combined Figure 3 and Figure 4 As shown, the fixing hole located on the first osteotomy part 2 is called the "first fixing hole 23", and the fixing hole located on the second osteotomy part 3 is called the "second fixing hole 33".

[0069] The distance D1 (the vertical distance from the center of the first fixing hole 23 to the reference plane S) and the distance D2 (the vertical distance from the center of the second fixing hole 33 to the reference plane S) from the second fixing hole 33 to the reference plane S are equal. Therefore, when the distal femoral osteotomy block 10 is mated with the distal femoral positioning block 20, the positions of the first osteotomy portion 2 and the second osteotomy portion 3 relative to the distal femoral positioning block 20 can be swapped without having to rotate the holes or pins in the femur B. In other words, when the first osteotomy portion 2 and the second osteotomy portion 3 are used to perform the initial osteotomy on the femur B, the holes in the femur B can be shared. This reduces damage to the femur B and reduces the probability of fracture.

[0070] Preferably, the first fixing hole 23 and the second fixing hole 33 are mirrored with the reference plane S, so that when adjusting the installation position of the distal femoral osteotomy block 10 relative to the distal femoral positioning block 20, there is no need to move the distal femoral positioning block 20 laterally. It is only necessary to adjust the installation position of the first osteotomy part 2 and the second osteotomy part 3 relative to the distal femoral positioning block 20 to ensure that the fixing member can be fixed to the same position of the femur B, thereby completing the fixation of the distal femoral osteotomy block 10.

[0071] Combine Figure 3 As shown, in some embodiments, the distance d1 between the first fixing hole 23 and the first positioning boss 21 (referring to the vertical distance from the center of the first fixing hole 23 to the first positioning surface 21a) is equal to the distance d2 between the second fixing hole 33 and the second positioning boss 31 (referring to the vertical distance from the center of the second fixing hole 33 to the second positioning surface 31a). With this structural arrangement, when the first osteotomy portion 2 and the second osteotomy portion 3 are interchanged to accommodate the guidance needs of the osteotomy tool for supplementary osteotomy of the femur B, repeated drilling operations on the femur B are not required, thereby reducing the number of drillings on the femur B and reducing the probability of fracture.

[0072] Specifically, when the first osteotomy groove 22 of the first osteotomy part 2 is used to guide the osteotomy tool to perform supplementary osteotomy on the femur B, the first positioning boss 21 abuts against the osteotomy surface B2 of the femur B. When the second osteotomy groove 32 of the second osteotomy part 3 is used to guide the osteotomy tool to perform supplementary osteotomy on the femur B, the second positioning boss 31 abuts against the osteotomy surface B2 of the femur B. Because the first fixing hole 23 and the second fixing hole 33 are equidistant from the osteotomy surface B2 of the femur B, regardless of whether the first osteotomy part 2 or the second osteotomy part 3 is used to guide the osteotomy tool to perform supplementary osteotomy on the femur B, when the positions of the first osteotomy part 2 and the second osteotomy part 3 are interchanged to adjust the amount of supplementary osteotomy, a single hole position on the femur B can be shared, thereby reducing the number of holes opened in the femur B, thereby reducing damage to the femur B and the probability of fracture.

[0073] It should be noted that the first fixing hole 23 passes through the first osteotomy part 2, and the second fixing hole 33 passes through the second osteotomy part 3, so that a fixing member can pass through to fix the distal femoral osteotomy block 10 on the femur B using the fixing member.

[0074] Combine Figure 1 and Figure 2 As shown, the first osteotomy part 2 has a first inner side 2a and a first outer side 2b, and the first fixing hole 23 passes through the first inner side 2a and the first outer side 2b. The second osteotomy part 3 has a second inner side 3a and a second outer side 3b, and the second fixing hole 33 passes through the second inner side 3a and the second outer side 3b.

[0075] Combine Figure 5 As shown, when the first osteotomy part 2 is used to guide the osteotomy tool to perform osteotomy on the femur B, the first inner side surface 2a faces the side where the femur B is located, and the first outer side surface 2b faces away from the side where the femur B is located, that is, the first outer side surface 2b is located on the side where the second side surface 12 of the main body 1 is located.

[0076] Correspondingly, when the second osteotomy part 3 is used to guide the osteotomy tool to perform osteotomy on the femur B, the second medial surface 3a faces the side where the femur B is located, and the second lateral surface 3b faces away from the side where the femur B is located, that is, the second lateral surface 3b is located on the side where the first side 11 of the main body 1 is located.

[0077] Preferably, the first medial surface 2a and / or the second medial surface 3a extend in a curved or arcuate shape, and their shape roughly matches the shape of the anterior femoral condyle, so that when the osteotomy tool performs the osteotomy operation under the guidance of the distal femoral osteotomy block 10, the distal femoral osteotomy block 10 can stably fit with the articular surface of the femur B, thereby improving the connection stability between the distal femoral osteotomy block 10 and the femur B, thereby ensuring the stability of the osteotomy operation of the osteotomy tool under the guidance of the distal femoral osteotomy block 10.

[0078] For example, combined with Figure 5 As shown, after the distal femoral osteotomy block 10 is positioned relative to the femur B through the distal femoral positioning block 20, the distal femoral positioning block 20 abuts against the distal articular surface B1 of the femur B. At this time, the fixing member passes through the first fixing hole 23 and fixes the distal femoral osteotomy block 10 to the femur B. The first inner side surface 2a of the first osteotomy part 2 abuts against the articular surface of the femur B, making it difficult for the distal femoral osteotomy block 10 and the femur B to loosen, and the osteotomy tool can stably osteotomize the femur B along the first osteotomy groove 22 of the first osteotomy part 2.

[0079] Correspondingly, when the second osteotomy groove 32 of the second osteotomy part 3 is used to guide the osteotomy tool, the second inner side surface 3a of the second osteotomy part 3 abuts against the articular surface of the femur B, which can also improve the connection stability between the distal femoral osteotomy block 10 and the femur B, which will not be elaborated here.

[0080] Another aspect of the present invention provides an osteotomy device comprising the aforementioned distal femoral osteotomy block 10. Because the distal femoral osteotomy block 10 can accommodate a variety of osteotomy thicknesses, the operator no longer needs to frequently change osteotomy tools during osteotomy, simplifying the operation. Therefore, using this osteotomy device to perform osteotomy on femur B also simplifies the operation.

[0081] It should be noted that, combined with Figure 5 As shown, the osteotomy device includes a distal femoral positioning block 20, which is detachably connected to the distal femoral osteotomy block 10. The distal femoral positioning block 20 includes a mounting portion for cooperating with the mounting groove 13 and a resting portion for resting against the femur B. The shape of the mounting portion matches the shape of the mounting groove 13. The upper surface of the resting portion is a resting surface 201, which is used to rest against the femur B. In this embodiment, the resting surface 201 is coplanar with the upper surface of the mounting portion. In other embodiments, they may not be coplanar. In this case, only the vertical distance between the resting surface 201 and the upper surface of the mounting portion needs to be included in the calculation of the osteotomy amount, which can still meet the needs of the osteotomy tool for accurate osteotomy along the corresponding osteotomy groove. When the distal femoral osteotomy block 10 is used for the initial osteotomy operation, the distal femoral positioning block 20 can be used to position the distal femoral osteotomy block 10 to a suitable position relative to the femur B, so that the osteotomy tool can perform the initial osteotomy on the femur B under the guidance of the first osteotomy groove 22 or the second osteotomy groove 32 of the distal femoral osteotomy block 10.

[0082] In this embodiment, the distal femoral osteotomy block 10 and the distal femoral positioning block 20 can be flexibly disassembled, so that when performing an osteotomy operation using the osteotomy grooves of different osteotomy parts of the distal femoral osteotomy block 10, the distal femoral osteotomy block 10 can be removed from the distal femoral positioning block 20, and the installation direction of the distal femoral osteotomy block relative to the distal femoral positioning block 20 can be adjusted to complete the osteotomy groove replacement operation.

[0083] Combine Figure 5As shown, when osteotomy is performed on the distal end of femur B, the distal articular surface B1 of femur B abuts against the distal femoral positioning block 20, so that after the distal femoral osteotomy block 10 is installed on the distal femoral positioning block 20, the osteotomy tool passes through the first osteotomy groove 22 of the first osteotomy portion 2 of the distal femoral osteotomy block 10 to perform osteotomy on femur B, and the osteotomy amount H1 is. If the osteotomy amount H1 cannot meet the osteotomy requirement of femur B, and it is necessary to use the second osteotomy groove 32 of the second osteotomy portion 3 of the distal femoral osteotomy block 10 as a guide for the osteotomy tool, the distal femoral osteotomy block 10 can be removed from the distal femoral positioning block 20, and the installation direction of the distal femoral osteotomy block 10 is adjusted so that the second osteotomy portion 3 of the distal femoral osteotomy block 10 is located on the side of the distal femoral positioning block 20 facing the femur B, so that the second osteotomy groove 32 of the second osteotomy portion 3 can be used to guide the osteotomy tool.

[0084] It should be noted that, in the embodiment in which the first osteotomy portion 2 and the second osteotomy portion 3 are respectively provided with the first fixing hole 23 and the second fixing hole 33, the distal femoral positioning block 20 is provided with a connecting portion 20a. When the first osteotomy portion 2 is connected and fixed to the femur B by a fixing member passing through the first fixing hole 23, the second fixing hole 33 can be provided with a fixing member to be fixed to the connecting portion 20a so as to lock the distal femoral osteotomy block 10 and the distal femoral positioning block 20. Correspondingly, when the second osteotomy portion 3 is connected and fixed to the femur B by a fixing member passing through the second fixing hole 33, the first fixing hole 23 can be provided for the fixing member to pass through so as to fix the distal femoral osteotomy block 10 to the connecting portion 20a using the fixing member, thereby locking the positions of the distal femoral osteotomy block 10 and the distal femoral positioning block 20 so as to maintain the stability of the osteotomy operation.

[0085] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A distal femoral osteotomy block, characterized in that: The invention comprises a main body, a first osteotomy part and a second osteotomy part, the main body having a first side surface and a second side surface arranged opposite to each other, the first osteotomy part extending toward the side where the first side surface is located, and the second osteotomy part extending toward the side where the second side surface is located, wherein the first osteotomy part comprises a first positioning boss and a first osteotomy groove, the first osteotomy groove is located on the side of the first positioning boss facing away from the main body, and the distance from the first osteotomy groove to the first positioning boss is fixed at h1, the second osteotomy part comprises a second positioning boss and a second osteotomy groove, the second osteotomy groove is located on the side of the second positioning boss facing away from the main body On one side, the distance from the second osteotomy groove to the second positioning boss is fixed at h2, h2 is greater than or less than h1, and the main body is provided with a mounting groove, and the mounting groove passes through the first side surface and the second side surface in a direction parallel to the first osteotomy groove, and the mounting groove has a groove top wall and a groove bottom wall that are relatively arranged, and the groove top wall and the groove bottom wall are parallel to each other, and the distance h1 from the first osteotomy groove to the first positioning boss, the distance h2 from the second osteotomy groove to the second positioning boss, the distance H1 from the first osteotomy groove to the groove top wall, and the distance H2 from the second osteotomy groove to the groove bottom wall are not equal to each other.

2. The distal femoral osteotomy block according to claim 1, characterized in that: The first osteotomy part and the second osteotomy part are respectively connected to two ends of the main body.

3. The distal femoral osteotomy block according to claim 2, characterized in that: The cross section of the mounting groove is mirror-symmetrical with respect to a reference plane, and the reference plane is parallel to the first osteotomy groove and the second osteotomy groove.

4. The distal femoral osteotomy block according to claim 3, characterized in that: The distance from the first osteotomy groove to the reference plane is greater than or less than the distance from the second osteotomy groove to the reference plane.

5. The distal femoral osteotomy block according to claim 3, characterized in that: The mounting groove is a non-circular groove.

6. The distal femoral osteotomy block according to claim 3, characterized in that: The distance H1 from the first osteotomy groove to the groove top wall is greater than or less than the distance H2 from the second osteotomy groove to the groove bottom wall.

7. The distal femoral osteotomy block according to claim 6, characterized in that: The distance h1 from the first osteotomy groove to the first positioning boss and the distance h2 from the second osteotomy groove to the second positioning boss are in the range of 1 mm to 3 mm.

8. The distal femoral osteotomy block according to claim 6 or 7, characterized in that: The distance H1 from the first osteotomy groove to the groove top wall and the distance H2 from the second osteotomy groove to the groove bottom wall range from 5 mm to 8 mm.

9. The distal femoral osteotomy block according to claim 3, characterized in that: The first osteotomy part and the second osteotomy part are both provided with fixing holes, and the distances from the fixing holes on the first osteotomy part and the fixing holes on the second osteotomy part to the reference plane are equal.

10. The distal femoral osteotomy block according to claim 9, characterized in that: The fixing hole located on the first osteotomy part and the fixing hole located on the second osteotomy part use the reference plane as a mirror image plane.

11. The distal femoral osteotomy block according to claim 9, characterized in that: The distance d1 from the fixing hole on the first osteotomy part to the first positioning boss is equal to the distance d2 from the fixing hole on the second osteotomy part to the second positioning boss.

12. An osteotomy device, characterized in that: The invention comprises a distal femoral positioning block and the distal femoral osteotomy block according to any one of claims 1 to 11, wherein the distal femoral positioning block is detachably connected to the distal femoral osteotomy block.

13. The osteotomy device according to claim 12, characterized in that The distal femoral positioning block comprises a mounting portion for cooperating with the mounting slot and a supporting portion for supporting the femur, and the upper surface of the mounting portion is coplanar with the upper surface of the supporting portion.

14. The osteotomy device according to claim 12, characterized in that The distal femoral positioning block includes a connecting portion, and when the femur is connected to one of the first osteotomy portion and the second osteotomy portion, the connecting portion is used to connect to the other of the first osteotomy portion and the second osteotomy portion.

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