CN215018426U - Osteotomy device and distal femur osteotomy block thereof - Google Patents

Abstract

The utility model provides a cut bone device and thighbone distal end cuts bone piece thereof, thighbone distal end cuts bone piece includes main part, first osteotomy portion and second osteotomy portion, the main part has first side and the second side that sets up back to back of the body mutually, first osteotomy portion extends towards first side place one side, second osteotomy portion extends towards second side place one side, wherein, first osteotomy portion includes first location boss and first osteotomy groove, first osteotomy groove is located the one side that the main part place is dorsad of first location boss, second osteotomy portion includes second location boss and second osteotomy groove, the second osteotomy groove is located the one side that the main part place is dorsad of second location boss, and second osteotomy groove to second location boss's distance h2 is greater than or less than first osteotomy groove to first location boss's distance h1 to utilize first osteotomy groove and second osteotomy groove to satisfy the osteotomy direction of multiple osteotomy volume, the number of bone cutting tools for replacement is reduced, so as to simplify the bone cutting operation.

Description

Osteotomy device and distal femur osteotomy block thereof

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a cut bone device and thighbone distal end cuts bone piece thereof.

Background

In the unicondylar knee joint replacement surgery, the distal femur osteotomy is usually performed by fixing and matching the distal femur osteotomy block with the distal femur osteotomy positioning tool. The thickness of the osteotomy of the distal femur is generally consistent with the thickness of the distal femur condyle prosthesis of each manufacturer, that is, when the distal femur condyle prosthesis has different thicknesses, the distal femur osteotomy block with different osteotomy thicknesses is required to complete the osteotomy operation of the distal femur.

However, the conventional distal femur osteotomy block can only provide a single osteotomy thickness after being positioned relative to the femur by the distal femur osteotomy positioning tool, that is, only one distal femur osteotomy block can be used for osteotomy, and when the osteotomies with different thicknesses are required, the distal femur osteotomy blocks with different specifications need to be replaced. In the actual operation process, after the traditional femur distal end osteotomy block is adopted to osteotomy the femur, the condition of insufficient osteotomy thickness may occur, at this time, a supplementary osteotomy block needs to be selected to perform supplementary osteotomy, and the supplementary osteotomy block performs continuous osteotomy on the femur by taking an osteotomy surface formed by the primary osteotomy of the femur distal end as a reference. Because the distal femur degree of wear differs and there is the size difference between the different false bodies, will realize cutting the bone to the thighbone accuracy, just need supporting the distal femur osteotomy piece of two at least not unidimensional and supplementary osteotomy piece, not only be unfavorable for like this to cut the bone instrument and accomodate, the operator needs frequent change instrument simultaneously, and it is very inconvenient to operate.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model provides a little and exquisite, the easy and simple to handle bone cutting device of cutting the piece and including this distal femur of structure cuts the bone piece far away of thighbone.

On one hand, the utility model provides a distal femur osteotomy block, which comprises a main body part, a first osteotomy part and a second osteotomy part, the main body part is provided with a first side surface and a second side surface which are arranged in an opposite way, the first bone cutting part extends towards one side of the first side surface, the second bone cutting part extends towards one side of the second side surface, wherein the first bone cutting part comprises a first positioning boss and a first bone cutting groove, the first bone cutting groove is positioned at one side of the first positioning boss back to the main body part, the second bone cutting part comprises a second positioning boss and a second bone cutting groove, the second bone cutting groove is positioned at one side of the second positioning boss back to the main body part, 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.

In one embodiment, the first and second osteotomies are connected to respective ends of the body portion.

In one embodiment, the main body has a mounting groove, the mounting groove penetrates through the first side surface and the second side surface along a direction parallel to the first osteotomy groove, a 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.

In one embodiment, the first osteotomy groove is spaced from the datum surface by a distance greater than or less than the second osteotomy groove.

In one embodiment, the mounting slot is a non-circular slot.

In one embodiment, the mounting groove has oppositely disposed groove top and bottom walls, 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.

In one embodiment, the distance H1 from the first osteotomy groove to the first positioning projection, the distance H2 from the second osteotomy groove to the second positioning projection, 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 different from each other.

In one embodiment, the distance H1 from the first osteotomy groove to the first positioning projection and the distance H2 from the second osteotomy groove to the second positioning projection range from 1mm to 3mm, and/or 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 5mm to 8 mm.

In one embodiment, the first osteotomy part and the second osteotomy part are both provided with fixing holes, and the fixing holes on the first osteotomy part and the fixing holes on the second osteotomy part are equidistant from the datum plane.

In one embodiment, the reference plane is a mirror plane of the fixing hole on the first osteotomy part and the fixing hole on the second osteotomy part.

In one embodiment, the distance d1 from the fixation hole in the first osteotomy to the first locating boss is equal to the distance d2 from the fixation hole in the second osteotomy to the second locating boss.

On the other hand, the utility model provides a cut bone device, including thighbone distal end locating piece and foretell thighbone distal end osteotomy piece, thighbone distal end locating piece detachably connect in thighbone distal end osteotomy piece.

In one embodiment, the distal femur locating block comprises a mounting part matched with the mounting groove and an abutting part abutted against the femur, and the upper surface of the mounting part is coplanar with the upper surface of the abutting part.

In one embodiment, the femoral distal locating block includes a connection for connecting with one of the first and second osteotomies when a femur is connected with the other of the first and second osteotomies.

The utility model provides a cut bone device and thighbone distal end and cut bone piece thereof, this thighbone distal end cuts bone piece and includes the main part, first cut bone portion and second cut bone portion, first cut bone portion includes first location boss and first cut bone groove, second cut bone portion includes second location boss and second cut bone groove, first cut bone groove is located the main part place one side dorsad of first location boss, second cut bone groove is located the main part place one side dorsad of second location boss, and second cut bone groove is greater than or is less than the distance of first cut bone groove to first location boss to the distance of second location boss, when utilizing first cut bone groove and second cut bone groove to cut the bone cutter for the osteotomy direction like this, can obtain different osteotomy volume, satisfy the osteotomy direction of multiple osteotomy volume then, reduce the quantity of operation change osteotomy instrument, in order to simplify the osteotomy operation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, drawings of other embodiments can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a distal femoral resection block according to one embodiment;

FIG. 2 is a schematic structural view of another perspective of the distal femoral resection block shown in FIG. 1;

FIG. 3 is a schematic structural view of a further perspective of the distal femoral resection block shown in FIG. 1;

FIG. 4 is a side view of the distal femoral resection block of FIG. 1;

fig. 5 is a schematic view of a distal femur osteotomy block cooperating with a distal femur positioning block to perform a femur osteotomy operation according to an embodiment of the present invention;

fig. 6 is a schematic view of a supplementary osteotomy procedure using a distal femoral osteotomy block according to an embodiment of the present invention.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. 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, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 and 2, the present invention provides a distal femur osteotomy block 10, which includes a main body portion 1, a first osteotomy portion 2 and a second osteotomy portion 3.

The main body 1 serves as a placement carrier for the first and second osteotomies 2, 3 and has first and second opposite side surfaces 11, 12.

It should be noted that the distal femoral osteotomy block 10 may be a unitary structure, i.e., the main body portion 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 may be provided separately and may be fixed together by means of clamping, bonding, welding, or the like.

As shown in fig. 1 and 2, the first osteotomy portion 2 and the second osteotomy portion 3 are connected to two ends of the main body portion 1, respectively, the first osteotomy portion 2 extends toward the first side surface 11, and the second osteotomy portion 3 extends toward the second side surface 12. That is, the first and second osteotomies 2, 3 extend toward different sides with respect to the main body portion 1 so as to protrude from the first and second lateral sides 11, 12, respectively.

In the embodiment shown in fig. 1 and 2, the first and second osteotomy portions 2 and 3 are connected to the upper and lower ends of the body portion 1, respectively. In other embodiments, the first and second osteotomy portions 2 and 3 may be located at both the upper and lower ends of the main body portion 1, and in embodiments where the first and second osteotomy portions 2 and 3 are connected to the same end of the main body portion 1, the osteotomy grooves of the first and second osteotomy portions 2 and 3 communicate. Preferably, the first osteotomy part 2 and the second osteotomy part 3 are connected to both ends of the main body part 1, respectively, so that when one of the osteotomy parts is used for osteotomy, the other osteotomy part is not interfered, and the operation is more convenient.

The first truncated part 2 includes a first positioning boss 21 and a first truncated groove 22, and the first truncated groove 22 is located on a side of the first positioning boss 21 facing away from the main body part 1. The first positioning boss 21 has a first positioning surface 21a on a surface facing away from the main body 1, and is configured to abut against a osteotomy surface B2 at the distal end of the femur. The first locating 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 primary osteotomy. Preferably, the back of the first positioning surface 21a is also parallel to the first osteotomy groove 22, so as to facilitate the placement of the first positioning boss 21 on the distal femur positioning block 20.

Referring to fig. 6, when the femur B is subjected to the supplementary osteotomy operation by using the distal femur osteotomy block 10, the osteotomy plane B2 formed by the osteotomy of the femur B can abut 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 the supplementary osteotomy on the femur B.

The second osteotomy part 3 comprises a second positioning boss 31 and a second osteotomy groove 32, the second osteotomy groove 32 is positioned on a side of the second positioning boss 31 facing away from the main body part 1, so that an osteotomy surface B2 formed by osteotomy of the femur B is abutted against the second positioning surface 31a of the second positioning boss 31, and an osteotomy tool can pass through the second osteotomy groove 32 to perform supplementary osteotomy on the femur B. The second positioning boss 31 is preferably shaped similarly to the first positioning boss 21.

After the distal femur osteotomy block 10 is positioned relative to the femur B by the distal femur positioning block 20 (see fig. 5), if the osteotomy thickness corresponding to the primary osteotomy operation performed by the osteotomy tool is guided by the first osteotomy groove 22 or the second osteotomy groove 32 opposite to the osteotomy position of the femur B is insufficient, the osteotomy surface B2 formed by the primary osteotomy of the distal end of the femur B needs to be used as a new reference to perform the continuous osteotomy operation, i.e., the supplementary osteotomy operation, so that the total osteotomy amount of the distal end of the femur B finally meets the installation and use requirements of the prosthesis of the corresponding specification.

When the femoral bone B is subjected to the supplementary osteotomy operation, the osteotomy amount of the supplementary osteotomy is the thickness of the femoral bone B which is cut again on the basis of the osteotomy surface B2 formed by the primary osteotomy.

In some embodiments, when the distal femur osteotomy block 10 of the present embodiment is used to perform a supplementary osteotomy, the osteotomy surface B2 formed by the initial osteotomy of the distal end of the femur B is abutted against the first positioning surface 21a or the second positioning surface 31a, the osteotomy tool is further used to perform the further osteotomy on the femur B along the first osteotomy groove 22 or the second osteotomy groove 32 corresponding to the femur B, so that the supplementary osteotomy has a osteotomy amount corresponding to the distance from the corresponding first positioning surface 21a or the second positioning surface 31a when the osteotomy tool performs the supplementary osteotomy on the femur B, and the osteotomy amount is related to the distance from the corresponding first osteotomy groove 22 or the second osteotomy groove 3 to the corresponding first positioning surface 21a or the second positioning surface 31a because the osteotomy tool performs the corresponding osteotomy operation under the guidance of the first osteotomy groove 22 or the second osteotomy groove 32.

As shown in fig. 3 and 6, when the distal end of the femur B is cut by the first cutting portion 2, the cut surface B2 formed by cutting the femur B abuts on the first positioning surface 21a of the first positioning boss 21, and the amount of the cut bone by which the first positioning boss 21 cooperates with the first cutting groove 22 to cut the femur B is the vertical distance from the groove wall of the first cutting groove 22 on the side away from the first positioning surface 21a to the first positioning surface 21a, that is, the groove wall of the first cutting groove 22 on the side away from the first positioning surface 21a is used as a reference, and the amount of the cut bone is the distance h1 from the first cutting groove 22 to the first positioning boss 21.

Accordingly, when the distal end of the femur B is cut by the second cutting portion 3, the cutting surface B2 formed by cutting the femur B needs to abut against the second positioning surface 31a of the second positioning boss 31, so that the cutting amount of the complementary cut corresponding to the cutting tool when performing the complementary cut along the second cutting groove 32 is the distance h2 from the second cutting groove 32 to the second positioning boss 31 (as above, the perpendicular distance from the groove wall of the second cutting groove 32 on the side away from the second positioning surface 31a to the second positioning boss 31).

The distance h2 from the second resection groove 32 to the second positioning projection 31 is greater or less than the distance h1 from the first resection groove 22 to the first positioning projection 21. Therefore, the amount of bone cutting for supplementing the bone cutting of the femur B by using the first bone cutting part 2 and the second bone cutting part 3 is different, that is, or, the distal femur bone cutting block 10 of the present embodiment can adapt to the bone cutting needs of more size ranges, so as to reduce the number of times of replacing the bone cutting tool in the distal femur B bone cutting operation, and make the distal femur B bone cutting operation more concise.

It should be noted that the osteotomy amount of the complementary osteotomy operation performed on the femur B may 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 may be configured according to the osteotomy amount of the complementary osteotomy operation performed on the femur B to meet the requirements of different osteotomy amounts.

Based on this, the distance h1 from the first osteotomy groove 22 to the first positioning boss 21 may have a value range of 1mm to 3mm, the distance h2 from the second osteotomy groove 32 to the second positioning boss 31 may have a value range of 1mm to 3mm, and h1 is greater than or less than h 2.

For example, in some embodiments, the distance h1 from the first resection slot 22 to the first positioning projection 21 is 1mm, and the distance h2 from the second resection slot 32 to the second positioning projection 31 is 2mm or 3 mm. Therefore, when the osteotomy amount required for performing the supplementary osteotomy operation on the distal end of the femur B is 1mm, the first osteotomy portion 2 can be selected for performing the supplementary osteotomy on the distal end of the femur B, and accordingly, when the distance h2 from the second osteotomy groove 32 to the second positioning boss 31 is 2mm, the second osteotomy portion 3 can be utilized to meet the requirement of the femur B with the supplementary osteotomy amount of 2 mm.

For example, in other embodiments, the distance h1 from the first osteotomy groove 22 to the first positioning ledge 21 is 3mm, and the distance h2 from the second osteotomy groove 32 to the second positioning ledge 31 is 1.5mm or 2.5 mm. The requirements of different osteotomy quantities for supplementing the osteotomy can be met.

The amount of bone resection for the supplementary bone resection for the first and second bone resections 2, 3 may be other possibilities, and will not be described in detail herein. For the size configuration of the first osteotomy part 2 and the second osteotomy part 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 not equal to the distance h1 from the first osteotomy groove 22 to the first positioning boss 21, so that one distal femoral osteotomy block 10 can adapt to the complementary osteotomy needs of different sizes.

In the distal femur osteotomy block 10, the first osteotomy portion 2 and the second osteotomy portion 3 are respectively provided with the first osteotomy groove 22 and the second osteotomy groove 32, so that the first osteotomy groove 22 and the second osteotomy groove 32 can be used for guiding the osteotomy operation of the osteotomy tool, so as to meet the requirement of performing the primary osteotomy on the distal end of the femur B. And because the first osteotomy portion 2 and the second osteotomy portion 3 extend in different directions relative to the main body portion 1, when one of the osteotomy portions guides the osteotomy tool, the other osteotomy portion does not interfere with the femur B and the tibia near the knee joint.

Referring to fig. 1 and 5, the main body 1 is formed with a mounting groove 13, and the mounting groove 13 penetrates the first side 11 and the second side 12 in a direction parallel to the first osteotomy groove 22. Thus, the mounting groove 13 can be used to cooperate with the distal femur positioning block 20 to position the distal femur osteotomy block 10 relative to the femur B using the distal femur positioning block 20, so that the first osteotomy groove 22 or the second osteotomy groove 32 of the distal femur osteotomy block 10 can guide the osteotomy tool to perform the osteotomy.

As shown in fig. 4, the cross-section of the mounting groove 13 is a mirror image with a reference plane S as a symmetry plane, which is parallel to the first and second cut grooves 22 and 32. The cross section (the section parallel to the extending direction of the first side surface 11) of the groove wall of the mounting groove 13 may be any regular or irregular figure as long as the reference surface S is a mirror image with a symmetrical surface, such as a rectangle, a circle, a semicircle, an ellipse, an oblong (a figure formed by a rectangle and two semicircles at two ends), an i-shape, a cross, a star, a diamond, and the like, and a non-circular figure is preferable for preventing the femur distal end section block 10 from rotating circumferentially. Because the mounting groove 13 is a mirror image with the reference plane S as a symmetry plane, the distal femur bone block 10 can be directly matched with the distal femur positioning block 20 after being turned over without moving or replacing the distal femur positioning block 20, and the mounting groove 13 and the distal femur positioning block 20 still have good matching stability.

The following description will be given taking as an example a case where the mounting groove 13 shown in fig. 4 is an i-shaped groove, but the following description is applicable to all cases where the mounting groove 13 has a pair of mutually parallel sides, such as a rectangular shape, a cross shape, a hexagonal shape, an irregular pattern having a pair of mutually parallel sides, and the like.

For convenience of description, as shown in fig. 4, a side wall of the mounting groove 13 adjacent to the first positioning protrusion 21 is referred to as a "groove top wall 13 a", and a side wall of the mounting groove 13 adjacent to the second positioning protrusion 31 is referred to as a "groove bottom wall 13 b".

Since the first and second positioning bosses 21 and 31 are respectively located at opposite ends of the body part 1 and the mounting groove 13 penetrates the first and second side surfaces 11 and 12 in a direction parallel to the first kerf groove 22, the groove top wall 13a and the groove bottom wall 13b of the mounting groove 13 are oppositely arranged in a direction perpendicular to the first kerf groove 22. It should be noted that the top wall 13a and the bottom wall 13b are parallel to each other and to the plane of the first osteotomy groove 22 and the plane of the second osteotomy groove 32.

Referring to fig. 5, the distal femur positioning block 20 cooperates with the mounting groove 13 to position the distal femur osteotomy block 10 at the osteotomy position relative to the femur B, and the distal articulation surface B1 of the femur B abuts against the distal femur positioning block 20, so that the perpendicular distance between the surface of the distal femur positioning block 20 abutting against the femur B (hereinafter referred to as "abutting surface 201") and the first osteotomy groove 22 is the amount of osteotomy. Since the abutment surface 201 is coplanar with the slot top wall 13a or the slot bottom wall 13b when the distal femur positioning block 20 is fitted into the mounting slot 13 in this embodiment, the amount of bone osteotomy for the initial bone osteotomy can be measured by the distance from the first osteotomy slot 22 to the slot top wall 13a or the distance from the second osteotomy slot 32 to the slot bottom wall 13 b. If the abutting surface 201 is not coplanar with the groove top wall 13a or the groove bottom wall 13b, the amount of osteotomy of the initial osteotomy operation can be measured in terms of the distance from the first osteotomy groove 22 to the reference plane S or the distance from the second osteotomy groove 32 to the reference plane S.

For example, as shown in fig. 4 and 5, when the osteotomy tool is guided to perform the primary osteotomy operation by the first osteotomy groove 22 of the first osteotomy portion 2, the groove top wall 13a of the mounting groove 13 is located above the groove bottom wall 13B, and the distal femur positioning block 20 is engaged with the mounting groove 13 to abut the distal end articular surface B1 of the femur B against the distal femur positioning block 20. Specifically, the surface of the distal femur positioning block 20 abutting against the femur B is fitted to the groove top wall 13a of the mounting groove 13, and at this time, the distance H1 from the first osteotomy groove 22 to the groove top wall 13a is the osteotomy amount of the initial osteotomy operation.

Accordingly, when the primary osteotomy is performed by guiding the osteotomy tool with the second osteotomy groove 32 of the second osteotomy portion 3, the distance H2 from the second osteotomy groove 32 to the slot bottom wall 13b is the osteotomy amount of the primary osteotomy.

The amount of bone cutting of the primary bone cutting by the bone cutting tool is guided by the corresponding first bone cutting groove 22 or the second bone cutting groove 32 on the distal femur bone cutting block 10, and the configuration can be carried out according to the thickness of the distal end of the femoral B prosthesis, so that the installation of the femoral B prosthesis with the corresponding specification can be adapted after the distal end of the femoral B prosthesis is subjected to bone cutting operation.

In some embodiments, the first resection groove 22 of the first resection part 2 guides the resection tool to perform the initial resection of the femur B with a resection amount of 5mm to 8mm, i.e., the distance H1 from the first resection groove 22 to the groove top wall 13a ranges from 5mm to 8mm, such as 5mm, 6mm, 7mm, or 8 mm. The distance H2 from the second osteotomy groove 32 to the groove top wall 13a may range from 5mm to 8mm, such as 5mm, 6mm, 7mm or 8 mm.

In some embodiments, the distance H1 from the first resection slot 22 to the slot top wall 13a is greater than or less than the distance H2 from the second resection slot 32 to the slot bottom wall 13B, i.e., H1 is not equal to H2, such that the distal femoral resection block 10 having the first and second resected portions 2 and 3 can meet the requirements of different resections of the distal end of the femur B. It will be readily appreciated that the first osteotomy groove 22 is now spaced further from the reference plane S than or less than the second osteotomy groove 32.

It should be noted that, after utilizing first osteotomy groove 22 to guide the osteotomy cutter to carry out the operation of cutting the bone for the first time, if cut bone thickness not enough, can supply and cut the bone operation, take the utility model discloses a thighbone distal end osteotomy piece 10 guide cuts the osteotomy cutter and carries out the operation of cutting the bone to thighbone B, can satisfy the needs that multiple size supplied and cut the bone.

Specifically, in the supplementary osteotomy operation, the osteotomy surface B2 of the femur B may be abutted against the first positioning surface 21a of the first positioning boss 21 or the osteotomy surface B2 of the femur B may be abutted against 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; alternatively, the osteotomy tool may continue the osteotomy procedure along the first osteotomy slot 22 or the second osteotomy slot 32 opposite the femur B by abutting the osteotomy surface B2 of the femur B against the distal femur positioning block 20.

As described above, when the distance H1 from the first resection groove 22 to the first positioning projection 21, the distance H2 from the second resection groove 32 to the second positioning projection 31, the distance H1 from the first resection groove 22 to the groove top wall 13a, and the distance H2 from the second resection groove 32 to the groove bottom wall 13b are different from each other, 4 different supplementary resection thicknesses can be obtained by the above-described 4 supplementary resection operations. Therefore, utilize the utility model discloses a thighbone distal end cuts bone piece 10 can adapt to in a flexible way and carry out the osteotomy demand that different osteotomies were measured to thighbone B, reduces to cut the quantity that changes the osteotomy instrument in the operation process to make to cut the bone operation more simple and convenient.

As shown in fig. 4, the first osteotomy part 2 and the second osteotomy part 3 are both provided with fixing holes for the fixing element to pass through, so that the fixing element can fix the distal femur osteotomy block 10 to the femur B, and the distal femur osteotomy block 10 is prevented from loosening relative to the femur B to affect the accuracy of the osteotomy position of the osteotomy tool. The fixing member may be a screw or a set pin, which is not limited herein.

For convenience of description, as shown in fig. 3 and 4, the fixing hole on the first osteotomy portion 2 is referred to as a "first fixing hole 23", and the fixing hole on the second osteotomy portion 3 is referred to as a "second fixing hole 33".

The distance D1 from the first fixing hole 23 to the reference plane S (which means the vertical distance from the center of the first fixing hole 23 to the reference plane S) is equal to the distance D2 from the second fixing hole 33 to the reference plane S (which means the vertical distance from the center of the second fixing hole 33 to the reference plane S), so that when the distal femur osteotomy block 10 is fitted to the distal femur positioning block 20, the positions of the first osteotomy part 2 and the second osteotomy part 3 relative to the distal femur positioning block 20 can be changed without the need of drilling or nailing operations on the femur B, that is, when the first osteotomy is performed on the femur B by using the first osteotomy part 2 and the second osteotomy part 3, the hole positions on the femur B can be shared. This reduces the risk of injury to the femur B, which reduces the probability of fracture.

Preferably, the first fixing hole 23 and the second fixing hole 33 use the reference plane S as an image plane, so that when adjusting the installation position of the distal femur osteotomy block 10 relative to the distal femur positioning block 20, it is only necessary to fix the fixing element and the same position of the femur B by making the first osteotomy portion 2 and the second osteotomy portion 3 relative to the distal femur positioning block 20 without moving the distal femur positioning block 20 laterally, thereby completing the fixing of the distal femur osteotomy block 10.

As shown in fig. 3, in some embodiments, the distance d1 from the first fixing hole 23 to the first positioning protrusion 21 (which refers to the vertical distance from the center of the first fixing hole 23 to the first positioning surface 21 a) is equal to the distance d2 from the second fixing hole 33 to the second positioning protrusion 31 (which refers to the vertical distance from the center of the second fixing hole 33 to the second positioning surface 31 a). Under the arrangement of the structure, when the positions of the first osteotomy part 2 and the second osteotomy part 3 are exchanged to meet the guiding requirement of supplementing the osteotomy of the femur B by the osteotomy tool, the femur B is not required to be repeatedly opened, so that the number of the openings on the femur B is reduced, and the probability of fracture is reduced.

Specifically, when the first osteotomy groove 22 of the first osteotomy portion 2 is used to guide the osteotomy tool to perform the supplementary osteotomy on the femur B, the first positioning boss 21 abuts against the osteotomy surface B2 of the femur B, and when the second osteotomy groove 32 of the second osteotomy portion 3 is used to guide the osteotomy tool to perform the 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, no matter the first osteotomy part 2 or the second osteotomy part 3 is adopted to guide the osteotomy tool to perform the supplementary osteotomy operation on the femur B, when the positions of the first osteotomy part 2 and the second osteotomy part 3 are interchanged to adjust the osteotomy amount of the supplementary osteotomy, one hole position on the femur B can be shared, so that the number of the openings on the femur B is reduced, the damage to the femur B is reduced, and the probability of fracture is reduced.

It should be noted that the first fixing hole 23 is formed through the first osteotomy portion 2, and the second fixing hole 33 is formed through the second osteotomy portion 3, so that a fixing member can be passed therethrough to fix the distal femoral osteotomy block 10 to the femur B.

As shown in fig. 1 and 2, the first osteotomy portion 2 has a first inner side surface 2a and a first outer side surface 2b, and the first fixing hole 23 penetrates the first inner side surface 2a and the first outer side surface 2 b. The second osteotomy portion 3 has a second medial side 3a and a second lateral side 3b, and the second fixation hole 33 extends through the second medial side 3a and the second lateral side 3 b.

As shown in fig. 5, when the osteotomy tool is guided by the first osteotomy portion 2 to perform an osteotomy operation on the femur B, the first inner side surface 2a faces the side of the femur B, and the first outer side surface 2B faces away from the side of the femur B, i.e., the first outer side surface 2B is located on the side of the second side surface 12 of the main body portion 1.

Accordingly, when the osteotomy tool is guided by the second osteotomy portion 3 to perform the osteotomy operation on the femur B, the second medial surface 3a faces the side of the femur B, and the second lateral surface 3B faces away from the side of the femur B, i.e., the second lateral surface 3B is located on the side of the first lateral surface 11 of the main body portion 1.

Preferably, the first inner side surface 2a and/or the second inner side surface 3a extend in a curved surface or a cambered surface, and the shape of the first inner side surface and/or the second inner side surface is approximately matched with the shape of the femoral front side condyle, so that when the osteotomy tool performs an osteotomy operation under the guidance of the femoral distal osteotomy block 10, the femoral distal osteotomy block 10 can stably fit with the articular surface of the femur B, the connection stability of the femoral distal osteotomy block 10 and the femur B is improved, and the stability of the osteotomy tool in the guidance of the femoral distal osteotomy block 10 is ensured.

For example, as shown in fig. 5, after the distal femur osteotomy block 10 is positioned relative to the femur B by the distal femur positioning block 20, the distal femur positioning block 20 abuts against the distal joint surface B1 of the femur B, at this time, the fixing member passes through the first fixing hole 23 and fixes the distal femur osteotomy block 10 to the femur B, the first inner side surface 2a of the first osteotomy portion 2 abuts against the joint surface of the femur B, so that the distal femur block 10 and the femur B are not easily loosened, and the osteotomy tool can stably osteotomy the femur B along the first osteotomy groove 22 of the first osteotomy portion 2.

Accordingly, when the osteotomy tool is guided by the second osteotomy groove 32 of the second osteotomy portion 3, the second inner lateral surface 3a of the second osteotomy portion 3 abuts against the articular surface of the femur B, and the connection stability between the distal femur osteotomy block 10 and the femur B can be improved as well, which is not described herein again.

Another aspect of the present invention further provides an osteotomy device, comprising the distal femur osteotomy block 10. Due to the adoption of the femur far-end osteotomy block 10, the requirement of various osteotomy thicknesses can be met, so that when an operator performs an osteotomy operation, frequent replacement of an osteotomy tool is not required, and the operation complexity is simplified. Therefore, even when the osteotomy device is used to osteotomy the femur B, the operation complexity can be simplified.

It should be noted that, as shown in fig. 5, the osteotomy device includes a distal femur positioning block 20, and the distal femur positioning block 20 is detachably connected to the distal femur osteotomy block 10. The distal femur locating block 20 includes a mounting portion for mating with the mounting groove 13 and an abutment portion for abutting against the femur B. The shape of the mounting portion matches the shape of the mounting groove 13. The upper surface of the abutting part is an abutting surface 201 for abutting against the femur B. In this embodiment, the abutting surface 201 is coplanar with the upper surface of the mounting part, and in other embodiments, the abutting surface may not be coplanar, and at this time, the bone cutting tool can still meet the requirement of accurate bone cutting along the corresponding bone cutting groove only by counting the vertical distance between the abutting surface 201 and the upper surface of the mounting part into the calculation of the bone cutting amount. In performing the primary osteotomy procedure using the distal femoral resection block 10, the distal femoral resection block 10 may be positioned relative to the femur B using the distal femoral positioning block 20 so that the osteotomy tool performs the primary resection of the femur B under the guidance of the first resection slot 22 or the second resection slot 32 of the distal femoral resection block 10.

In this embodiment, the distal femur osteotomy block 10 and the distal femur positioning block 20 can be flexibly detached, so that when the osteotomy slots of different osteotomy portions of the distal femur osteotomy block 10 are used for osteotomy operation, the distal femur osteotomy block 10 can be detached from the distal femur positioning block 20, and the mounting direction of the distal femur osteotomy block relative to the distal femur positioning block 20 is adjusted, thereby completing the replacement operation of the osteotomy slots.

As shown in fig. 5, when the distal end of the femur B is resected, the distal articular surface B1 of the femur B abuts against the distal femur locating block 20, therefore, after the distal femur osteotomy block 10 is mounted on the distal femur positioning block 20, if the osteotomy amount of the osteotomy tool to osteotomy the femur B through the first osteotomy groove 22 of the first osteotomy portion 2 of the distal femur osteotomy block 10 is H1, and if the osteotomy amount H1 cannot satisfy the osteotomy requirement for the femur B, and the osteotomy tool needs to be guided by the second osteotomy groove 32 of the second osteotomy portion 3 of the distal femur osteotomy block 10, the distal femur osteotomy block 10 can be detached from the distal femur positioning block 20, the installation direction of the distal femur osteotomy block 10 can be adjusted, so that the second osteotomy part 3 of the distal femoral osteotomy block 10 is located on a side of the distal femoral positioning block 20 facing the femur B, this makes it possible to guide the osteotomy tool using the second osteotomy groove 32 of the second osteotomy portion 3.

It should be noted that in the embodiment where the first and second osteotomies 2 and 3 are respectively provided with the first and second fixing holes 23 and 33, the distal femur positioning block 20 is provided with a connecting portion 20a, and when the first osteotomy 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 femur positioning block 20 and the distal femur osteotomy block 10. Accordingly, when the second osteotomy portion 3 is fixed to the femur B by the fixing element passing through the second fixing hole 33, the first fixing hole 23 can be passed through by the fixing element to fix the distal femur osteotomy block 10 and the connecting portion 20a by the fixing element, thereby locking the positions of the distal femur osteotomy block 10 and the distal femur positioning block 20 so as to maintain the stability of the osteotomy operation.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (14)

1. The distal femur osteotomy block is characterized by comprising a main body part, a first osteotomy part and a second osteotomy part, wherein the main body part is provided with a first side surface and a second side surface which are arranged in a back-to-back manner, the first osteotomy part extends towards one side of the first side surface, the second osteotomy part extends towards one side of the second side surface, the first osteotomy part comprises a first positioning boss and a first osteotomy groove, the first osteotomy groove is positioned at one side of the first positioning boss, which is back to the main body part, the second osteotomy part comprises a second positioning boss and a second osteotomy groove, the second osteotomy groove is positioned at one side of the second positioning boss, which is back to the main body part, and the distance h2 from the second osteotomy groove to the second positioning boss is greater than or smaller than the distance h1 from the first osteotomy groove to the first positioning boss.

2. The femoral distal resection block of claim 1, wherein the first and second resected portions are connected to respective ends of the body portion.

3. The distal femoral resection block of claim 2, wherein the body portion defines a mounting slot extending through the first and second side surfaces in a direction parallel to the first resection slot, the mounting slot having a cross-section that is mirror symmetric about a reference plane that is parallel to the first and second resection slots.

4. The femoral distal resection block of claim 3, wherein the first resection slot is at a distance from the reference surface that is greater than or less than the distance from the second resection slot to the reference surface.

5. The distal femoral resection block of claim 3, wherein the mounting slot is a non-circular slot.

6. The femoral distal resection block of claim 3, wherein the mounting slot has oppositely disposed slot top and slot bottom walls, the slot top wall and the slot bottom wall being parallel to one another, the first resection slot having a distance H1 from the slot top wall that is greater than or less than the distance H2 from the second resection slot to the slot bottom wall.

7. The femoral distal resection block of claim 6, wherein the distance H1 from the first resection groove to the first positioning boss, the distance H2 from the second resection groove to the second positioning boss, the distance H1 from the first resection groove to the groove top wall, and the distance H2 from the second resection groove to the groove bottom wall are different from one another.

8. The femoral distal resection block of claim 6, wherein the distance H1 from the first resection groove to the first positioning projection and the distance H2 from the second resection groove to the second positioning projection range from 1mm to 3mm, and/or the distance H1 from the first resection groove to the groove top wall and the distance H2 from the second resection groove to the groove bottom wall range from 5mm to 8 mm.

9. The distal femoral resection block of claim 3, wherein the first and second resected portions each define a fixation hole, and wherein the fixation holes on the first resected portion and the fixation holes on the second resected portion are equidistant from the reference plane.

10. The distal femoral resection block of claim 9, wherein the fixation hole on the first resection and the fixation hole on the second resection are mirrored on the reference plane.

11. The femoral distal resection block of claim 9, wherein a distance d1 from the fixation hole on the first resection part to the first positioning boss is equal to a distance d2 from the fixation hole on the second resection part to the second positioning boss.

12. An osteotomy device comprising a distal femoral positioning block and a distal femoral osteotomy block of any one of claims 1-11, said distal femoral positioning block being removably attachable to said distal femoral osteotomy block.

13. The osteotomy device of claim 12, wherein said distal femoral locator block includes a mounting portion for mating with the mounting slot and an abutment portion for abutment with the femur, an upper surface of said mounting portion being coplanar with an upper surface of said abutment portion.

14. The osteotomy device of claim 12, wherein said distal femoral locating block includes a connection for connecting with one of said first and second osteotomies when a femur is connected with the other of said first and second osteotomies.

Images