CN215079255U

CN215079255U - Tibia osteotomy device and osteotomy positioning assembly thereof

Info

Publication number: CN215079255U
Application number: CN202022565734.8U
Authority: CN
Inventors: 黄欢欢; 孙延东; 付长帅
Original assignee: Suzhou Microport Orthorecon Co Ltd
Current assignee: Suzhou Microport Orthorecon Co Ltd
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-12-10
Anticipated expiration: 2030-11-09

Abstract

The utility model provides a shin bone cuts bone device and cuts bone locating component thereof should cut bone locating component including surveying piece, connecting seat and locking mechanical system, surveys the piece including the measuring part and the guide part that are connected, and the connecting seat includes main part and connecting portion, main part and guide part sliding fit, and connecting portion connect in one side of main part to be used for connecting and cut the hone lamella, locking mechanical system is connected with the connecting seat, is used for with the length direction's of guide part lateral wall looks butt and extrusion guide part. The utility model discloses a shin bone cuts bone device and cuts bone locating component thereof utilizes measuring part can be fixed to knee joint clearance department with detecting stably, through the mode with connecting seat sliding fit in the guide part of detecting, improves connecting seat installation convenience to cooperate or separate connecting seat and cut bone baffle fast, and the connecting seat is difficult to relatively detect the piece and appears shifting under the retardation effect that locking mechanical system provided, thereby maintains the location accuracy to cutting the bone baffle.

Description

Tibia osteotomy device and osteotomy positioning assembly thereof

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a shin bone cuts bone device and cuts bone locating component thereof.

Background

Resection of the tibial side is required during unicondylar knee replacement surgery to install a suitable tibial prosthesis. The accuracy of the osteotomy will directly affect the outcome of the prosthesis installation.

Knee cartilage wears out due to prolonged vigorous activity, degeneration, osteoarthritis, and the like, which in turn causes pain of varying degrees. Typically, the distal femoral and tibial articular surfaces are subject to more wear. Under the condition that the unilateral compartment of the knee joint has pathological changes, the use of the unilateral knee joint replacement operation can achieve the purposes of micro trauma, small incision, less osteotomy amount, low infection rate, rapid rehabilitation and the like.

Among the shin bone osteotomy thickness measurement device during knee joint replacement at present, probe mechanism is not hard up easily and influences osteotomy board location accuracy, and when adjustment probe mechanism position, needs frequently lock or loosen the operation to the screw, seriously influences operating efficiency.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model provides a shin bone cuts bone device and cuts bone locating component thereof effectively solves complex operation and appears becoming flexible easily and lead to fixing a position unsafe technical problem.

The utility model provides a pair of cut bone locating component, include:

the probe comprises a measuring part and a guide part, wherein the measuring part is used for being inserted into a joint gap, the guide part is in a straight rod shape, and the guide part is connected to one end of the measuring part;

the connecting seat comprises a main body part and a connecting part, wherein the main body part is provided with a guide hole, the guide part is in sliding fit with the guide hole, the connecting part is connected to one side of the main body part and is used for connecting a bone truncating plate, and when the bone truncating plate is connected with the connecting part, a bone truncating groove of the bone truncating plate is parallel to the guide hole; and

and the locking mechanism is connected with the connecting seat and is abutted against the side wall of the guide part in the length direction and extrudes the guide part.

In one embodiment, the guide hole extends through the body portion.

In one embodiment, the main body portion defines a mounting hole, the mounting hole penetrates through a sidewall of the guide hole, and the locking mechanism is disposed in the mounting hole and at least partially extends into the guide hole and abuts against the guide portion.

In one embodiment, the locking mechanism includes a spring, a ball and a plug, the plug is disposed at an end of the mounting hole away from the guiding hole, two ends of the spring elastically abut against the ball and the plug, respectively, and when the guiding portion is engaged with the guiding hole, the spring drives the ball to abut against the guiding portion.

In one embodiment, an arc-shaped groove is formed in one side, which abuts against the ball, of the guide portion, the arc-shaped groove penetrates through one end, which is far away from the measuring portion, of the guide portion along the length direction of the guide portion, the radius of curvature of the arc-shaped groove is equal to that of the ball, and the ball rolls and abuts against the wall surface of the arc-shaped groove.

In one embodiment, the side wall of the mounting hole is connected with the side wall of the guide hole through a spherical curved surface, the spherical curved surface penetrates through the side wall of the guide hole to form a limiting hole, the diameter of the limiting hole is smaller than that of the ball, and the curvature radius of the spherical curved surface is equal to that of the ball.

In one embodiment, the locking mechanism includes a ball pin having a ball head that extends into the guide hole so that the ball head abuts the guide portion when the guide portion is mated with the guide hole.

In one embodiment, the connecting portion comprises a first arm and a second arm which are arranged at intervals, wherein the first arm is parallel to the extending direction of the guide hole and is used for being inserted into the osteotomy groove of the osteotomy plate, the second arm is used for arranging a locking member, and the locking member is used for locking the relative position of the osteotomy plate and the connecting seat.

In one embodiment, the locking member has a threaded end, the second support arm has a threaded hole, and the threaded end is matched with the threaded hole and supports and fixes the osteotomy plate to the first support arm.

On the other hand, the utility model provides a shin bone cuts bone device, including cutting bone plate and foretell bone positioning component that cuts, cut the bone plate with the connection can be dismantled to the connecting seat.

The utility model provides a shin bone cuts bone device and cuts bone locating component thereof should cut bone locating component including surveying piece, connecting seat and locking mechanical system, surveys the piece including measurement portion and guide part, utilizes measurement portion can be fixed to knee joint clearance department with surveying the piece steadily, and the connecting seat cooperatees through gliding mode and the guide part of surveying the piece mutually to can swiftly adjust the distance of the relative shin bone of connecting seat in a flexible way, so that cooperate or separate with cutting the bone baffle. The locking mechanism extrudes the side wall of the length direction of the guide part to generate acting force for blocking the connecting seat from sliding along the guide part, so that the connecting seat is not easy to shift relative to the detection part when the position of the connecting seat is not required to be adjusted, and the positioning accuracy of the osteotomy guide plate is maintained.

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 an osteotomy positioning assembly of the tibial osteotomy device in one embodiment;

FIG. 2 is a schematic structural view of a probe of the osteotomy positioning assembly of the tibial osteotomy device illustrated in FIG. 1;

FIG. 3 is a structural schematic view from another perspective of a probe of the osteotomy positioning assembly of the tibial osteotomy device illustrated in FIG. 2;

FIG. 4 is a schematic view of the attachment socket of the osteotomy positioning assembly shown in FIG. 1;

FIG. 5 is a schematic view of the attachment socket of the osteotomy positioning assembly of FIG. 4 from another perspective;

FIG. 6 is a schematic view of a retaining member of one embodiment of the osteotomy positioning assembly;

FIG. 7 is a cross-sectional view of the osteotomy plate locking member of the osteotomy positioning assembly of one embodiment, showing the osteotomy plate in the connecting seat;

FIG. 8 is a schematic view of the osteotomy positioning assembly determining the osteotomy position of the osteotomy plate during an osteotomy procedure using the tibial osteotomy device;

FIG. 9 is a schematic structural view of a locking mechanism of an osteotomy positioning assembly in another embodiment;

FIG. 10 is a schematic view of the probe being inserted into the knee joint space during an osteotomy procedure using the tibial osteotomy device;

FIG. 11 is a schematic view showing the connecting base moving toward the osteotomy plate along the guiding portion of the probe during the osteotomy procedure using the tibial osteotomy device;

FIG. 12 is a schematic view showing the connection seat moving along the guide portion of the probe to engage with the osteotomy plate during an osteotomy procedure using the tibial osteotomy device;

FIG. 13(a) is a cross-sectional view of a probe at a guide in an embodiment of the osteotomy positioning assembly;

FIG. 13(b) is a cross-sectional view of a probe at a guide in another embodiment of the osteotomy positioning assembly;

fig. 13(c) is a schematic cross-sectional view of a probe at a guide portion in a further embodiment of the osteotomy positioning assembly.

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, the present invention provides a tibial osteotomy device, including an osteotomy positioning assembly 10 and an osteotomy plate 20. Wherein the osteotomy positioning assembly 10 is configured to determine an osteotomy position for the osteotomy plate 20 such that the osteotomy plate 20 is capable of guiding an osteotomy tool in a precise position for an osteotomy procedure.

The osteotomy plate 20 has an osteotomy slot 21 (see fig. 7), and after the osteotomy plate 20 is accurately fixed relative to the tibia B, a plane of the osteotomy cutter moving along the osteotomy slot 21 to osteotomy the tibia B is an osteotomy plane. In this embodiment, the osteotomy positioning assembly 10 positions the osteotomy position of the osteotomy plate 20, i.e., determines the osteotomy plane of the osteotomy plate 20.

Osteotomy positioning assembly 10 includes probe 11, coupling receptacle 12 and locking mechanism 13. The detecting member 11 is slidably connected to the connecting holder 12. Specifically, as shown in fig. 2 and 3 in conjunction, the probe 11 includes a guide portion 111 and a measurement portion 112. The guide portion 111 has a straight rod shape, and the guide portion 111 is connected to one end of the measurement portion 112. Referring to fig. 4 and 5, the connecting holder 12 includes a body portion 121 and a connecting portion, and the connecting holder 12 is provided with a guide hole 12 a. As shown in fig. 1, the guide portion 111 is slidably fitted to the guide hole 12 a.

The connecting part is connected to one side of the body part 121 and is used to detachably connect with the osteotomy plate 20 so that the osteotomy plate 20 can be connected with the probe member 11 through the connecting seat 12 when it is required to determine the installation position of the osteotomy plate 20. After positioning of the osteotomy plate 20 is completed and the position of the osteotomy plate 20 relative to the tibia B is fixed, the attachment base 12 may be removed from the osteotomy plate 20 to accommodate the need for the osteotomy plate 20 to provide osteotomy guidance for the osteotomy tool.

As shown in fig. 7, when the osteotomy plate 20 is coupled to the coupling portion, the osteotomy groove 21 of the osteotomy plate 20 is parallel to the guide hole 12 a. Since the guide portion 111 is slidably fitted to the guide hole 12a, when the osteotomy plate 20 is fitted to the coupling portion of the coupling holder 12, the extension direction of the osteotomy groove 21 of the osteotomy plate 20 is parallel to the extension direction of the guide portion 111. Thus, after the osteotomy plate 20 is fixed in position relative to the probe 11 by the connecting seat 12, the distance between the osteotomy groove 21 and the guiding portion 111 is constant, and the measuring portion 112 is positioned in the knee joint gap C, so that the position of the osteotomy groove 21 relative to the tibia B can be determined, and the osteotomy tool can perform osteotomy at the accurate position of the tibia B along the osteotomy groove 21.

The locking mechanism 13 is connected to the connecting holder 12, and the locking mechanism 13 abuts against the longitudinal side wall of the guide portion 111 to press the guide portion 111.

Note that, the pressing direction of the guide portion 111 by the lock mechanism 13 may be in a direction perpendicular to the extending direction of the guide portion 111. In other embodiments, the locking mechanism 13 may also press the guide portion 111 obliquely, that is, the pressing direction of the locking mechanism 13 to the guide portion 111 forms an acute angle or an obtuse angle with the extending direction of the guide portion 111, and at this time, the locking mechanism 13 still has a pressing effect in the direction perpendicular to the extending direction of the guide portion 111.

Utilize locking mechanical system 13 to the extrusion of guide part 111, play the location effect of blocking to detecting piece 11 for detecting piece 11 can not rock in the direction of inserting relative to connecting seat 12, thereby guarantees the stability of detecting piece 11 and connecting seat 12 relative position. Specifically, locking mechanism 13 has a friction positioning effect on probe member 11 relative to connecting holder 12, and locking mechanism 13 can generate a blocking force to prevent connecting holder 12 from sliding relative to guide portion 111. Under the drive of no external force, the connecting seat 12 is not easy to move relative to the detecting member 11 under the retarding effect of the locking mechanism 13 on the detecting member 11. In a case where the external force overcomes the blocking force of the locking mechanism 13, the coupling holder 12 slides along the guide portion 111.

The measurement portion 112 is arc-shaped, and the measurement portion 112 is used for being inserted into a knee joint gap C between the femur a and the tibia B to perform gap measurement, thereby determining the degree of wear of the tibia B so as to determine an osteotomy position for osteotomy of the tibia B. The arc-shaped measuring part 112 can adapt to the shape of the articular surface of the femur a facing the tibia B, so that when the measuring part 112 is used for measuring the knee joint gap C, the measuring part 112 can be stably positioned in the knee joint gap C to find the lowest point of the femoral posterior condyle, thereby improving the measuring accuracy. It is to be understood that the measuring portion 112 is not limited to an arc shape, and may be a straight rod shape or other known bone probe shape.

After the measurement unit 112 is placed in the knee joint space C, the guide unit 111 is in a horizontal state with the extension direction of the tibia B as the vertical direction, that is, the guide unit 111 is perpendicular to the extension direction of the tibia B. Due to the fitting of the guide hole 12a with the guide portion 111, the connection holder 12 can slide along the guide portion 111. Therefore, in the vertical direction, namely along the length direction of the tibia B, the position of the connecting seat 12 relative to the guide part 111 is fixed, at the moment, the osteotomy plate 20 is connected with the connecting seat 12, the position of the osteotomy plate 20 relative to the detecting piece 11 is fixed, then the position of the osteotomy plate 20 relative to the tibia B can be determined by taking the detecting piece 11 as a positioning reference, and then when the osteotomy cutter moves along the osteotomy groove 21 of the osteotomy plate 20, the tibia B can be accurately osteotomy.

Guide hole 12a runs through main part 121 to when making connecting seat 12 pass through guide hole 12a and the guide part 111 sliding fit of detecting piece 11, connecting seat 12 can have great sliding range along main part 121, like this alright assemble connecting seat 12 to guide part 111 or take off connecting seat 12 from guide part 111 in a flexible way, greatly improve connecting seat 12 and the cooperation convenience of detecting piece 11.

It should be noted that, because the guide portion 111 is in sliding fit with the guide hole 12a, at this time, the guide portion 111 can only slide relative to the connecting seat 12 along its extending direction, and will not shake in the guide hole 12a, in other words, the connecting seat 12 can stably slide along the guide portion 111. When the measuring part 112 connected with the guide part 111 is inserted into the knee joint gap C, the height of the connecting base 12 relative to the tibia B is determined at the position of the guide part 111 in the direction perpendicular to the guide part 111, so that after the osteotomy plate 20 is fixed relative to the connecting base 12, the height of the osteotomy plate 20 relative to the measuring part 112 is fixed, so that the osteotomy cutter can accurately osteotomy the tibia B along the osteotomy groove 21 of the osteotomy plate 20 with the position of the measuring part 112 determined at the knee joint gap C as a reference.

Referring to fig. 7, the main body 121 is provided with a mounting hole 12b, the mounting hole 12b penetrates through a side wall of the guide hole 12a, the locking mechanism 13 is disposed in the mounting hole 12b, and at least a portion of the locking mechanism extends into the guide hole 12a and abuts against the guide portion 111, so as to provide a blocking force for the guide portion 111 to slide in the guide hole 12a, so that the connection seat 12 and the detecting member 11 are not easily loosened to maintain the positioning accuracy of the osteotomy plate 20.

With continued reference to fig. 7, locking mechanism 13 includes plug 131, spring 132, and ball 133. The plug 131 is disposed at an end of the mounting hole 12b far from the guide hole 12a, so that the end of the mounting hole 12b far from the guide hole 12a can be plugged by the plug 131 after the ball 133 and the spring 132 are fitted into the mounting hole 12 b. Two ends of the spring 132 are elastically abutted against the ball 133 and the plug 131 respectively. When the guiding portion 111 is matched with the guiding hole 12a, the spring 132 drives the ball 133 to abut against the guiding portion 111, so that a blocking force is provided between the connecting seat 12 and the guiding portion 111 by the rolling abutment of the ball 133 and the guiding portion 111, and the positioning of the detecting element 11 and the connecting seat 12 is realized.

An arc-shaped groove 113 is formed on one side of the guide part 111, which is abutted against the ball 133. An arc-shaped groove 113 penetrates through one end of the guide portion 111 away from the measurement portion 112 in the longitudinal direction of the guide portion 111 (see fig. 3). The curvature radius of the arc-shaped groove 113 is equal to that of the ball 133, the ball 133 is in rolling contact with the wall surface of the arc-shaped groove 113, and the ball 133 and the wall surface of the arc-shaped groove 113 have a good rolling friction effect. With such a structure, the blocking effect of the ball 133 on the sliding of the guide portion 111 in the guide hole 12a is moderate, which neither results in too large blocking force to affect the flexibility of the connecting seat 12 sliding along the guide portion 111, nor results in poor positioning effect between the detecting element 11 and the connecting seat 12 due to too small blocking force of the ball 133 on the guide portion 111.

In some embodiments, as shown in fig. 5, the side wall of the mounting hole 12b is connected to the side wall of the guide hole 12a through a spherical curved surface 12c, and the spherical curved surface 12c penetrates the side wall of the guide hole 12a to form a limiting hole 12d, the size of the limiting hole 12d is smaller than the diameter of the ball 133, and the radius of curvature of the spherical curved surface 12c is equal to the radius of the ball 133. With this arrangement, after the guide portion 111 is removed from the guide hole 12a, the ball 133 abuts against the spherical curved surface 12c under the elastic force of the spring 132, and the spring 132 is always kept in a compressed state, so that when the guide portion 111 is inserted into the guide hole 12a to abut against the ball 133, the spring 132 has a large elastic abutting force. Meanwhile, since the size of the stopper hole 12d is smaller than the diameter of the ball 133, the ball 133 does not completely enter the guide hole 12a, so as to prevent the guide portion 111 from not easily penetrating into the guide hole 12a due to the ball 133 excessively entering the guide hole 12 a.

In other embodiments, as shown in connection with fig. 9, the locking mechanism may also be a ball pin 13', the ball pin 13' having a ball head 13a 'extending into the guide hole 12a such that the ball head 13a' abuts the guide portion 111 when the guide portion 111 is mated with the guide hole 12 a. The main body 13b ' of the ball pin 13' may be rigid or elastic, when the main body 13b ' of the ball pin 13' is elastic, the ball head 13a ' may elastically abut against the guide portion 111, and the main body 13b ' of the ball pin 13' may be elastically deformed by a force, so that the resistance ratio of the structure to the guide portion 111 is moderate, which may not only meet the requirement of positioning the connecting seat 12 with respect to the guide portion 111, but also ensure the reliability of the sliding of the connecting seat 12 with respect to the guide portion 111.

Referring to fig. 5 and 6, the connecting portion includes a first arm 122 and a second arm 123, the first arm 122 and the second arm 123 are spaced apart, wherein the first arm 122 is adapted to be inserted into the osteotomy slot 21 of the osteotomy plate 20, so that the first arm 122 is used to position the osteotomy plate 20 in the connecting seat 12, thereby positioning the osteotomy plate 20 relative to the connecting seat 12.

Referring to fig. 7 and 8, the second arm 123 is provided with a locking member 14, the locking member 14 is used to lock the relative position of the osteotomy plate 20 and the connecting seat 12, so that when the connecting seat 12 is matched with the guide portion 111 of the probe 11 through the guide hole 12a, the relative position of the osteotomy plate 20 and the connecting seat 12 is locked by the locking member 14, the osteotomy plate 20 can be positioned relative to the probe 11, thereby facilitating the subsequent osteotomy plate 20 to perform osteotomy by guiding the osteotomy tool at a correct position by the osteotomy groove 21 with reference to the position detected by the probe 11.

As shown in fig. 5 to 7, the locking member 14 has a threaded end 14a, the second arm 123 has a threaded hole 123a, and the threaded end 14a is engaged with the threaded hole 123a, so as to tightly support the osteotomy plate 20 on the first arm 122.

The locking member 14 may be a bolt or a stud having a screw portion.

In the osteotomy procedure using the tibial osteotomy device, as shown in fig. 10, the measurement portion 112 of the probe 11 may be first placed in the knee joint space C between the femur a and the tibia B, thereby stabilizing the position of the probe 11 relative to the tibia B.

It should be noted that, for the knee joint gaps C of different sizes, the probe 11 of a proper specification needs to be selected to ensure the accuracy of the gap measurement result, so as to facilitate the improvement of the accuracy of the subsequent osteotomy operation position. The size of the probe 11 can be divided into various sizes according to the thickness of the measuring part 112, so that when the tibia B is worn to different degrees, the measuring parts 112 with different thickness sizes can be adopted for measuring the gap.

In some embodiments, the thickness of the measuring portion 112 ranges from 1mm to 6mm, for example, the thickness of the measuring portion 112 is 1mm, 2mm, 3mm, 4mm, 5mm, or 6 mm.

As shown in fig. 11, after selecting a probe 11 of a suitable specification and placing the measuring portion 112 of the probe 11 in the knee joint gap C, the connecting holder 12 is fitted to the guide portion 111 of the probe 11, that is, the guide portion 111 passes through the guide hole 12a of the connecting holder 12. So that the coupling holder 12 can slide along the guide portion 111 to adjust the distance of the coupling holder 12 to the femur a.

Referring to fig. 12, the connecting seat 12 is slid along the guide portion 111 to finally bring the connecting seat 12 close to the osteotomy plate 20 previously set near the tibia B, the height of the osteotomy plate 20 is adjusted up and down according to the height of the connecting portion of the connecting seat 12 to be matched with the height of the connecting portion of the connecting seat 12, and then the two are fixedly connected, thereby determining the installation position of the osteotomy plate 20 relative to the tibia B.

Taking the connecting portion comprising the first arm 122 and the second arm 123 as an example, when the connecting portion 12 moves along the guiding portion 111 to make the first arm 122 match with the osteotomy groove 21 of the osteotomy plate 20, the osteotomy plate 20 is finally fixed to the first arm 122 by moving the locking member 14 relative to the second arm 123, so that the relative position of the osteotomy plate 20 and the connecting portion 12 is determined.

Since the guide portion 111 is substantially horizontal after the measuring portion 112 of the probe 11 is inserted into the knee joint gap C, the height of the connecting seat 12 relative to the tibia B is determined when the connecting seat 12 moves along the guide portion 111. When the osteotomy plate 20 is locked at the connecting portion of the connecting block 12, the relative position of the osteotomy plate 20 and the probe 11 is determined, so that the position of the osteotomy plate 20 relative to the tibia B can be determined using the position of the probe 11 determined at the knee joint gap C as a reference. In turn, when the osteotomy plate 20 is fixed relative to the tibia B, the osteotomy plate 20 is less likely to shift in position with the probe 11 positioned so as to accurately fix the osteotomy plate 20 to the tibia B.

In the subsequent osteotomy operation, after the osteotomy plate 20 is fixed to the tibia B by the fixing assembly (not shown), the connecting seat 12 is detached from the osteotomy plate 20, so that the osteotomy slot 21 of the osteotomy plate 20 is not occupied by the first arm 122 of the connecting seat 12, and the osteotomy tool can pass through the osteotomy slot 21 and osteotomy the tibia B under the guidance of the osteotomy slot 21.

It should be noted that, the cross-sectional shape of the guide portion 111 is not particularly required as long as the guide portion 111 of the probe 11 and the guide hole 12a of the connection holder 12 can be adapted to the requirement of the sliding fit.

As shown in fig. 13(a) to 13(c), the cross-sectional profile of the guide portion 111 may include a circular arc or a straight line. For example, the guiding portion 111 may be a cylinder or a semi-cylinder, in this case, if an arc-shaped slot 113 needs to be formed on the guiding portion 111, the extending direction of the arc-shaped slot 113 is the axial direction of the cylinder or the semi-cylinder.

In some embodiments, the guiding portion 111 may be a cylinder with a rectangular, trapezoidal or ellipsoidal cross section as a whole, as long as it can be slidably fitted into the guiding hole 12a of the connecting seat 12, and in this embodiment, an arc-shaped groove 113 may be opened along the axial direction of the cylinder. The cross-sectional shape of the guide 111 will not be described in detail.

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

1. An osteotomy positioning assembly, comprising:

2. The osteotomy positioning assembly of claim 1, wherein said guide bore extends through said body portion.

3. The osteotomy positioning assembly of claim 1, wherein said body portion defines a mounting hole extending through a sidewall of said guide hole, said locking mechanism being disposed within said mounting hole and at least partially configured to extend into said guide hole and abut said guide portion.

4. The osteotomy positioning assembly of claim 3, wherein the locking mechanism comprises a spring, a ball and a plug, the plug is disposed at an end of the mounting hole away from the guiding hole, two ends of the spring elastically abut against the ball and the plug, respectively, and when the guiding portion is engaged with the guiding hole, the spring urges the ball to abut against the guiding portion.

5. The osteotomy positioning assembly of claim 4, wherein an arc-shaped slot is formed on a side of the guiding portion abutting against the ball, the arc-shaped slot penetrates through an end of the guiding portion away from the measuring portion along a length direction of the guiding portion, a radius of curvature of the arc-shaped slot is equal to a radius of curvature of the ball, and the ball rolls and abuts against a wall surface of the arc-shaped slot.

6. The osteotomy positioning assembly defined in claim 4 or claim 5 wherein the sidewall of said mounting hole is connected to the sidewall of said guiding hole by a spherical curved surface, and said spherical curved surface forms a limiting hole through the sidewall of said guiding hole, the diameter of said limiting hole is smaller than the diameter of said ball, and the radius of curvature of said spherical curved surface is equal to the radius of said ball.

7. The osteotomy positioning assembly of claim 3, wherein said locking mechanism includes a ball pin having a ball head extending into said guide bore for abutting said guide portion when said guide portion is mated with said guide bore.

8. The osteotomy positioning assembly of claim 1, wherein said connecting portion includes first and second spaced apart arms, wherein said first arm is parallel to an extension of said guide hole and adapted to be received in an osteotomy slot of said osteotomy plate, and wherein said second arm is adapted to provide a locking member adapted to lock a relative position of said osteotomy plate to said connecting block.

9. The osteotomy positioning assembly defined in claim 8, wherein said retaining member has a threaded end, said second arm defining a threaded aperture, said threaded end engaging said threaded aperture and retaining said osteotomy plate in place on said first arm.

10. A tibial osteotomy device comprising an osteotomy plate and the osteotomy positioning assembly of any one of claims 1-9, said osteotomy plate being removably attachable to said attachment base.