Elbow surgery instruments

Abstract

The present application belongs to the field of medical surgical instruments, and provides an elbow joint surgical instrument, which includes a head, fixed wings, and a fixed cage. The head is used to cover the surface of the distal end of the humerus; the fixed wings are connected to the side of the head and are used to connect to the humerus; the fixed cage is connected to the head and forms a bone crushing groove with the head for accommodating the filling bone, and the fixed cage also has a limiting structure for cooperating with the bone tissue of the distal end of the humerus. The elbow joint surgical instrument provided by the present application can greatly reduce the amount of osteotomy, which is conducive to later revision surgery. The filling bone placed in the bone crushing groove is conducive to promoting the patient's postoperative recovery and postoperative weight-bearing. The limiting structure cooperates with the bone tissue in the corresponding area of ​​the distal end of the humerus, which is conducive to strengthening the stability of the elbow joint surgical instrument fixed on the distal end of the humerus.

Description

Technical Field

[0001] The present application belongs to the technical field of medical surgical instruments, and more specifically, to an elbow joint surgical instrument. Background Art

[0002] The flexion, extension and rotation functions of the elbow joint are crucial to our daily life and work. Once the elbow joint is injured or its function is limited, it will seriously affect our quality of life and work ability. When the elbow joint is seriously injured, elbow replacement surgery is required to restore the elbow joint function.

[0003] Existing elbow surgical instruments require a large amount of bone resection during replacement surgery, which results in significant restrictions on postoperative weight bearing and creates significant difficulties for subsequent revision surgeries. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide an elbow joint surgical instrument to solve the technical problem that the elbow joint surgical instrument in the prior art has a large amount of bone cutting when performing replacement surgery.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in this application is: to provide an elbow joint surgical instrument, comprising:

[0006] A head, the head being used to cover the surface of the distal end of the humerus;

[0007] A fixing wing connected to a side of the head and used to connect to the humerus; and

[0008] A fixing cage is connected to the head and forms a bone crushing groove with the head for accommodating the filling bone. The fixing cage also has a limiting structure for cooperating with the bone tissue at the distal end of the humerus.

[0009] Optionally, the limiting structure is formed on the edge of the fixing cage, and the limiting structure has a fitting surface which is arranged away from the head and is used to match and fit with the bone tissue at the distal end of the humerus.

[0010] The above technical solution, by adopting a fitting surface that matches and fits with the bone tissue of the distal humerus, makes the fixation cage and the distal humerus fit well, effectively prevents the elbow surgical instruments from loosening, and is conducive to enhancing the stability of the elbow surgical instruments fixed on the distal humerus.

[0011] Optionally, the fitting surface is a planar structure or a non-planar structure.

[0012] The above technical solution, by setting the fitting surface as a planar structure or a non-planar structure to match and fit with the corresponding bone cross section of the humerus, is conducive to strengthening the stability of the cooperation between the limiting structure and the humerus. In addition, when the fitting surface is a non-planar structure, the fixing cage is restricted from different angles, effectively improving the accuracy of elbow joint surgical instrument implantation.

[0013] Optionally, the fitting surface is a rough surface.

[0014] The above technical solution, by setting the fitting surface as a rough surface, is conducive to increasing the contact area between the fitting surface and the humerus, thereby enhancing the bonding ability between the fitting surface and the bone tissue of the distal end of the humerus, and improving the initial stability of the elbow joint surgical instrument fixed on the distal end of the humerus.

[0015] Optionally, the limiting structure is formed at the edge of the fixation cage and is used to surround the bone tissue at the distal end of the humerus.

[0016] The above technical solution, by surrounding the bone tissue at the distal end of the humerus that has not been osteotomized, limits the movement of the elbow surgical instrument through the limiting structure, which is beneficial to improving the initial stability of the elbow surgical instrument fixed on the distal end of the humerus.

[0017] Optionally, the fixing cage is arranged on the edge of the head, and the fixing cage is a curved surface.

[0018] The above technical solution, by setting the fixing cage at the edge of the head and setting the fixing cage as an arc surface, is conducive to increasing the space of the bone crushing groove. At the same time, the arc-shaped fixing cage is adapted to the anatomical structure of the patient's distal humerus, which is convenient for the limiting structure of the fixing cage to cooperate with the bone tissue of the distal humerus to perform auxiliary positioning, thereby improving the initial stability of the elbow joint surgical instruments fixed on the distal humerus. At the same time, it can also make the overall bone structure shape after replacement consistent with the bone structure shape before replacement, which is closer to the user's own bone structure morphology, and is more conducive to the recovery of the patient's joint function after replacement.

[0019] Optionally, the fixing cage is a hollow structure, and a plurality of hollow holes are formed on the fixing cage, wherein the aperture of the hollow holes ranges from 0.5 mm to 10 mm, and the radial dimension of the cross section of the connecting ribs surrounding the hollow holes ranges from 0.5 mm to 5 mm.

[0020] The above technical solution, by setting the fixing cage as a hollow structure, is conducive to reducing the weight of the fixing cage, and further helps to reduce the overall weight of the elbow joint surgical instrument. The above parameter settings enable the fixing cage to better fix the filling bone and prevent the filling bone in the bone crushing groove from leaking out of the hollow hole, while ensuring that the fixing cage has the required mechanical strength and is not easy to deform.

[0021] Optionally, the head is provided with a fixing groove for mounting the distal end of the humerus, and the bone crushing groove is communicated with the fixing groove.

[0022] The above technical solution, when the elbow joint surgical instrument is implanted into the elbow joint, the distal part of the humerus is installed into the fixing groove, which effectively strengthens the stability of the connection between the elbow joint surgical instrument and the distal part of the humerus. By connecting the bone crushing groove with the fixing groove, more filling bone can be accommodated, effectively increasing the contact area between the filling bone in the bone crushing groove and the humeral osteotomy surface, and accelerating the healing speed of the humeral osteotomy surface.

[0023] Optionally, the inner wall of the fixing groove has a fusion structure or fusion material for promoting the healing of the distal humeral osteotomy surface.

[0024] The above technical solution is helpful to accelerate the healing speed of the distal humeral osteotomy surface by arranging a growth structure or growth material for promoting the healing of the distal humeral osteotomy surface on the inner wall of the fixing groove.

[0025] The present application also provides an elbow joint replacement instrument, including a bone crushing limiter and any of the above-mentioned elbow joint surgical instruments, wherein the bone crushing limiter is detachably arranged on the head and cooperates with the fixing cage to limit the distribution position of the filling bone in the bone crushing groove.

[0026] The beneficial effects of the elbow joint surgical instrument provided by the present application are as follows: compared with the prior art, the elbow joint surgical instrument of the present application covers the surface of the distal end of the humerus through the head, and only needs to replace part of the surface of the distal end of the humerus, thereby being able to reduce the amount of osteotomy to a large extent, which is conducive to later revision surgery, and is connected to the humerus through the fixed wing, and the fixing method is simple, and the fixed cage and the head form a bone crushing groove for accommodating the filling bone, which is conducive to reducing the difficulty of design and processing, and the outer contour of the fixed cage can be flexibly designed according to the anatomical structure of the distal end of the humerus, and the filling bone is limited by the bone crushing groove, so that the filling bone can be accurately and stably filled in the area with a large amount of osteotomy at the distal end of the humerus, which is conducive to promoting the patient's postoperative recovery and postoperative weight-bearing. In addition, the coordination of the limiting structure with the bone tissue in the corresponding area of ​​the distal end of the humerus is conducive to strengthening the initial stability of the elbow joint surgical instrument fixed on the distal end of the humerus. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1A schematic diagram of the front view of the elbow joint surgical instrument provided in an embodiment of the present application;

[0029] Figure 2 The elbow joint surgical instrument provided in the embodiment of the present application is used Figure 1 ;

[0030] Figure 3 The elbow joint surgical instrument provided in the embodiment of the present application is used Figure 2 ;

[0031] Figure 4 A schematic diagram of the rear view structure of the elbow joint surgical instrument provided in an embodiment of the present application;

[0032] Figure 5 The elbow joint surgical instrument provided in the embodiment of the present application is used Figure 3 ;

[0033] Figure 6 A schematic diagram of the side structure of an elbow joint surgical instrument provided in an embodiment of the present application;

[0034] Figure 7 The elbow joint surgical instrument provided in the embodiment of the present application is used Figure 4 ;

[0035] Figure 8 Schematic diagram of the structure of the fixing cage and the humerus provided in the embodiment of the present application Figure 1 ;

[0036] Fig. 9 Schematic diagram of the structure of the fixing cage and the humerus provided in the embodiment of the present application Figure 2 ;

[0037] Fig.10 Schematic diagram of the structure of the fixing cage and the humerus provided in the embodiment of the present application Figure 3 ;

[0038] Fig.11 A schematic diagram of the three-dimensional structure of an elbow replacement device provided in an embodiment of the present application;

[0039] Fig.12 A schematic diagram of the three-dimensional structure of the bone crushing limiter provided in an embodiment of the present application.

[0040] Among them, the reference numerals in the figure are:

[0041] 100. Elbow joint surgical instrument; 10. Head; 11. Fixing groove; 20. Fixing wing; 21. Fixing hole; 211. First hole portion; 212. Second hole portion; 30. Fixing cage; 31. Bone crushing groove; 32. Limiting structure; 321. Fitting surface; 33. Hollow hole; 34. Connecting rib; 200. Bone crushing limiting piece; 300. Humerus. DETAILED DESCRIPTION

[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0043] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0044] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 a limitation on the present application.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0046] Please also read Figures 1 to 12 , the elbow joint surgical instrument 100 provided in the embodiment of the present application is now described.

[0047] See also Figure 1 and Figure 2 The elbow joint surgical instrument 100 includes a head 10, a fixing wing 20 and a fixing cage 30. The head 10 is used to cover the surface of the distal end of the humerus 300. The fixing wing 20 is connected to the side of the head 10, and the fixing wing 20 is used to connect to the humerus 300. The fixing cage 30 is connected to the head 10, and the fixing cage 30 and the head 10 enclose a bone crushing groove 31, and the bone crushing groove 31 is used to accommodate the filling bone. The fixing cage 30 also has a limiting structure 32, and the limiting structure 32 is used to cooperate with the bone tissue at the distal end of the humerus 300.

[0048] The distal end of the humerus 300 refers to an end of the humerus 300 close to the ulna, and the proximal end of the humerus 300 refers to an end of the humerus 300 far from the ulna.

[0049] The fixing wing 20 can be in a strip shape, one end of which is connected to the head 10 and the other end extends along the proximal end of the humerus 300 . The fixing wing 20 is connected to the surface of the humerus 300 to fix the head 10 to the distal end of the humerus 300 .

[0050] The bone crushing groove 31 formed by the fixing cage 30 and the head 10 is used to accommodate the filling bone to limit the filling bone. The filling bone is used to fill the area with a large amount of bone resection at the distal end of the humerus 300 to make up for the bone loss in this area, and the filling bone can grow together with the humerus 300 during the postoperative recovery process to restore the normal shape and function of the distal end of the humerus 300 as much as possible. Among them, the filling bone is generally crushed bone, and the filling bone can be the patient's own bone tissue or artificial bone.

[0051] The limiting structure 32 matches the bone tissue morphology of the corresponding area of ​​the distal end of the humerus 300, such as Figure 2 , used to cooperate with the bone tissue at the distal end of the humerus 300 to enhance the stability of the elbow joint surgical instrument 100 fixed on the distal end of the humerus 300.

[0052] Compared with the prior art, the elbow joint surgical instrument 100 provided in the present application covers the surface of the distal end of the humerus 300 through the head 10, and only needs to replace part of the surface of the distal end of the humerus 300, thereby greatly reducing the amount of osteotomy, preserving the anatomical structure of the distal end of the humerus 300 as much as possible, improving the patient's comfort, and facilitating later revision surgery.

[0053] The head 10 is fixed to the distal end of the humerus 300 by connecting the fixing wing 20 to the humerus 300. The fixing method is simple and convenient for doctors to operate.

[0054] The bone crushing groove 31 for accommodating the filling bone is formed by the fixing cage 30 and the head 10, which is conducive to reducing the difficulty of design and processing, and the outer contour of the fixing cage 30 can be flexibly designed according to the anatomical structure of the distal end of the humerus 300. The filling bone is limited by the bone crushing groove 31, so that the filling bone can be accurately and stably filled in the area of ​​the distal end of the humerus 300 with a large amount of bone resection to make up for the bone loss in this area, which is conducive to improving the convenience of surgery and promoting the postoperative recovery of patients, so that the elbow joint of the surgical patient is flexible, which helps the patient to bear weight after surgery, and the use of filling bone is more conducive to reducing the weight of the patient's elbow joint and improving the patient's comfort compared to the use of metal materials in the prior art to fill the area with a large amount of bone resection.

[0055] In addition, the limiting structure 32 is matched and fitted with the bone tissue in the corresponding area of ​​the distal end of the humerus 300, which effectively prevents the elbow joint surgical instrument 100 from loosening with the distal end of the humerus 300, which is conducive to enhancing the initial stability of the elbow joint surgical instrument 100 fixed on the distal end of the humerus 300 and improving the comfort of the patient. It can be understood that the fixing cage 30 can not only fix the filling bone, but also strengthen the stability of the elbow joint surgical instrument 100 and the distal end of the humerus 300.

[0056] Optionally, the head 10, the fixing wing 20, and the fixing cage 30 can be integrally formed so that the elbow joint surgical instrument 100 is integrally formed, for example, integrally formed using 3D printing technology. Of course, the head 10, the fixing wing 20, and the fixing cage 30 can also be formed separately and then spliced ​​into one.

[0057] In some embodiments of this application, please refer to Figure 3 and Figure 4 The head 10 is provided with a fixing groove 11 for mounting the distal end of the humerus 300 , and the bone crushing groove 31 is communicated with the fixing groove 11 .

[0058] Optionally, the fixing cage 30 is arranged at the edge outside the fixing groove 11. Specifically, the fixing cage 30 is arranged at one end of the head 10 along the length direction of the head 10 and is located on the upper surface of the fixing groove 11, and the bottom of the bone crushing groove 31 is connected to the top of one end of the fixing groove 11.

[0059] According to the above technical solution, when the elbow joint surgical instrument 100 is implanted into the elbow joint, the distal end of the humerus 300 is installed into the fixing groove 11, which effectively enhances the stability of the connection between the elbow joint surgical instrument 100 and the distal end of the humerus 300. By connecting the bone crushing groove 31 with the fixing groove 11, more filling bone can be accommodated, effectively increasing the contact area between the filling bone in the bone crushing groove 31 and the osteotomy surface of the humerus 300, thereby accelerating the healing speed of the osteotomy surface of the humerus 300.

[0060] In some embodiments of the present application, the inner wall of the fixing groove 11 has a fusion structure or fusion material for promoting the healing of the distal osteotomy surface of the humerus 300 .

[0061] Optionally, the long-joined structure may be a porous structure, that is, a porous structure surface is formed on the inner wall of the fixing groove 11. Alternatively, the long-joined structure may also be a rough surface structure, for example, a rough surface is formed by sandblasting the inner wall of the fixing groove 11. The long-joined material may be a hydroxyapatite coating, that is, a hydroxyapatite coating surface is formed by applying the hydroxyapatite coating on the inner wall of the fixing groove 11.

[0062] The above technical solution is helpful to accelerate the healing speed of the distal osteotomy surface of the humerus 300 by arranging a growth structure or growth material on the inner wall of the fixing groove 11 for promoting the healing of the distal osteotomy surface of the humerus 300.

[0063] The fixing wing 20 can be fixed to the dorsal side, the anterior side, the medial side or the lateral side of the humerus 300. When there are multiple fixing wings 20, the fixing wings 20 are simultaneously distributed on multiple surfaces of the dorsal side, the anterior side, the medial side or the lateral side of the humerus 300. The dorsal side of the humerus 300 refers to the side of the humerus 300 facing backward when the arm is in a naturally drooping state, the anterior side of the humerus 300 refers to the side of the humerus 300 facing forward when the arm is in a naturally drooping state, the medial side of the humerus 300 refers to the side of the humerus 300 facing the body when the arm is in a naturally drooping state, and the lateral side of the humerus 300 refers to the side of the humerus 300 facing away from the body when the arm is in a naturally drooping state.

[0064] The number of the fixing wings 20 may be one, two, three or more, and may be specifically designed according to the shape and degree of defect of the distal end of the patient's humerus 300 .

[0065] Optionally, see Figure 4 and Figure 5 There are two fixing wings 20, one of which is fixed to the dorsal side of the humerus 300, and the other fixing wing 20 is fixed to the medial side of the humerus 300. By providing two fixing wings 20, it is beneficial to improve the stability of the elbow joint surgical instrument 100 fixed to the distal end of the humerus 300.

[0066] In some embodiments of this application, please refer to Figure 4 and Figure 5 The fixing wing 20 is provided with a fixing hole 21 for a fastener connected to the humerus 300 to pass through.

[0067] The fastener passes through the fixing hole 21 and is connected to the humerus 300, so as to realize the connection between the fixing wing 20 and the humerus 300. The fixing hole 21 can be one or more of a threaded hole, a circular hole, a bar hole or a special-shaped hole, and the fastener can be a screw.

[0068] Optionally, the fixing hole 21 includes a first hole portion 211 and a second hole portion 212 that are connected to each other, and the first hole portion 211 and the second hole portion 212 are arranged along the length direction of the fixing wing 20, wherein the first hole portion 211 is a threaded hole, and the second hole portion 212 is a circular hole. The fastener connects the fixing wing 20 to the humerus 300 by threaded cooperation with the first hole portion 211, and the second hole portion 212 enables the fastener to have a pre-tightening force along the strand direction of the humerus 300 during the tightening process, which is beneficial to improving the initial stability of the elbow joint surgical instrument 100 fixed on the distal end of the humerus 300.

[0069] Optionally, the fixing wing 20 is provided with a plurality of fixing holes 21, and the plurality of fixing holes 21 are spaced apart along the length direction of the fixing wing 20. By providing a plurality of fixing holes 21 on the fixing wing 20, the stability of the connection between the fixing wing 20 and the humerus 300 is enhanced.

[0070] The position of the fixing cage 30 can be distributed according to the needs. For example, the fixing cage 30 can span the head 10 along the width direction of the head 10. When the elbow joint surgical instrument 100 is implanted in the elbow joint, the fixing cage 30 spans the distal end of the humerus 300, so that the fixing cage 30 can also be used to fix the broken bones in this area of ​​the distal end of the humerus 300. The fixing cage 30 can also be arranged at other positions of the head 10 corresponding to the severe bone defect of the humerus 300 to better fill and fix the severe bone defect of the humerus 300.

[0071] Optionally, see Figure 6 and Figure 7 The outer contour of the fixing cage 30 is flexibly designed according to the anatomical structure of the distal end of the patient's humerus 300 . The fixing cage 30 is disposed at the edge of the head 10 , and the fixing cage 30 is a curved surface.

[0072] The above technical solution, by setting the fixing cage 30 at the edge of the head 10 and setting the fixing cage 30 as an arc surface, is conducive to increasing the space of the bone crushing groove 31. At the same time, the fixing cage 30 with an arc structure is adapted to the anatomical structure of the distal end of the patient's humerus 300, which is convenient for the limiting structure 32 of the fixing cage 30 to cooperate with the bone tissue at the distal end of the humerus 300 to assist in positioning, improve the initial stability of the elbow joint surgical instrument 100 fixed on the distal end of the humerus 300, and also make the overall bone structure shape after replacement consistent with the bone structure shape before replacement, closer to the user's own bone structure morphology, and more conducive to the recovery of the patient's joint function after replacement. Of course, the fixing cage 30 can also be U-shaped, etc.

[0073] The number of the fixing cages 30 can be one or more, and the design is specifically based on the osteotomy condition and the degree of bone defect of the distal end of the patient's humerus 300 .

[0074] In some embodiments of this application, please refer to Figure 6, the fixed cage 30 is a hollow structure.

[0075] The above technical solution, by setting the fixing cage 30 as a hollow structure, is helpful to reduce the weight of the fixing cage 30, and further helps to reduce the overall weight of the elbow joint surgical instrument 100.

[0076] Specifically, a plurality of hollow holes 33 are formed on the fixed cage 30. The aperture of the hollow hole 33 ranges from 0.5 mm to 10 mm, wherein, when the hollow hole is an irregular shape, the maximum aperture and the minimum aperture of the hollow hole are within the range of 0.5 mm to 10 mm; optionally, the aperture of the hollow hole 33 ranges from 1.5 mm to 4 mm, for example, it can be 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm or 4 mm. The cross-sectional radial dimension of the connecting rib 34 surrounding the hollow hole 33 ranges from 0.5 mm to 5 mm, wherein, when the connecting rib is an irregular shape, the maximum radial dimension and the minimum radial dimension of the connecting rib are within the range of 0.5 mm to 5 mm, optionally, the cross-sectional radial dimension of the connecting rib 34 ranges from 1 mm to 2 mm, for example, 1 mm, 1.5 mm or 2 mm. The above parameter settings enable the fixing cage 30 to better fix the filling bone and prevent the filling bone in the bone crushing groove 31 from leaking out from the hollow hole 33, while ensuring that the fixing cage 30 has the required mechanical strength and is not easily deformed.

[0077] In one embodiment of the present application, the cross section of the connecting rib 34 is circular, so that the radial dimension of the cross section of the connecting rib 34 is the diameter of the connecting rib 34. It can be understood that the diameter of the connecting rib 34 ranges from 0.5 mm to 5 mm. Optionally, the diameter of the connecting rib 34 ranges from 1 mm to 2 mm, such as 1 mm, 1.5 mm or 2 mm. Of course, in other embodiments, the cross section of the connecting rib 34 may also be rectangular, elliptical or other special shapes.

[0078] In other embodiments of the present application, the fixing cage 30 is a solid structure.

[0079] The above technical solution, by setting the fixing cage 30 as a solid structure, is conducive to enhancing the mechanical strength of the fixing cage 30, so that the fixing cage 30 can better fix the filling bone, and is also conducive to enhancing the stability of the elbow joint surgical instrument 100 fixed to the distal end of the humerus 300.

[0080] Optionally, when the fixing cage 30 is a solid structure, a connecting hole is provided on the fixing cage 30. When implanted, screws or the like are used to pass through the connecting hole and fix it to the distal end of the humerus 300, which is beneficial to strengthen the stability of the connection between the elbow joint surgical instrument 100 and the distal end of the humerus 300.

[0081] In some embodiments of this application, please refer to Figure 6 and Figure 7The limiting structure 32 is formed at the edge of the fixing cage 30 , and the limiting structure 32 has a fitting surface 321 , which is arranged away from the head 10 , and the fitting surface 321 is used to match and fit with the bone tissue at the distal end of the humerus 300 .

[0082] The above technical solution, by using the fitting surface 321 to match and fit with the bone tissue at the distal end of the humerus 300, makes the fixing cage 30 and the distal end of the humerus 300 have good compatibility, effectively prevents the elbow joint surgical instrument 100 from loosening, and is beneficial to enhancing the stability of the elbow joint surgical instrument 100 fixed on the distal end of the humerus 300.

[0083] The fitting surface 321 matches the shape of the corresponding bone cross section of the humerus 300 .

[0084] Optionally, see Figure 8 The fitting surface 321 is a planar structure. The planar structure means that the fitting surface 321 is on the same plane, and the bone cross section corresponding to the fitting surface 321 of the humerus 300 is the plane formed when the osteotomy is performed with one knife.

[0085] The above technical solution, by setting the fitting surface 321 as a planar structure to match and fit with the corresponding bone cross section of the humerus 300, is conducive to enhancing the stability of the cooperation between the limiting structure 32 and the humerus 300.

[0086] Optionally, see Fig. 9 The fitting surface 321 may also be a non-planar structure. The non-planar structure means that the fitting surface 321 is not on the same plane, but includes multiple planes at different angles. The bone cross-section corresponding to the humerus 300 and the fitting surface 321 is a plane of multiple different angles formed during multiple osteotomies.

[0087] The above technical solution, by setting the fitting surface 321 as a non-planar structure, matches and fits with the bone cross section corresponding to the humerus 300, which is conducive to strengthening the stability of the cooperation between the limiting structure 32 and the humerus 300. In addition, when the fitting surface 321 is a non-planar structure, the fixing cage 30 is restricted from different angles, effectively improving the implantation accuracy of the elbow joint surgical instrument 100.

[0088] In some embodiments of the present application, the bonding surface 321 is a rough surface. When the fixed cage 30 is 3D printed, the bonding surface 321 can be formed into a rough surface by 3D printing technology. The bonding surface 321 can also be formed into a rough surface by post-processing methods such as sandblasting after the fixed cage 30 is formed.

[0089] The above technical solution, by setting the fitting surface 321 as a rough surface, is conducive to increasing the contact area between the fitting surface 321 and the humerus 300, thereby enhancing the bonding ability between the fitting surface 321 and the bone tissue at the distal end of the humerus 300, and improving the initial stability of the elbow joint surgical instrument 100 fixed on the distal end of the humerus 300.

[0090] Of course, in other embodiments, the fitting surface 321 may also be a smooth surface.

[0091] In some embodiments of this application, please refer to Fig.10 The limiting structure 32 is formed on the edge of the fixing cage 30 , and the limiting structure 32 is used to surround the bone tissue at the distal end of the humerus 300 .

[0092] The above technical solution, by surrounding the bone tissue at the distal end of the humerus 300 that has not been osteotomized, limits the movement of the elbow joint surgical instrument 100 through the limiting structure 32, which is beneficial to improving the initial stability of the elbow joint surgical instrument 100 fixed to the distal end of the humerus 300.

[0093] Optionally, the material of the fixing cage 30 can be the same as or different from that of the head 10 and the fixing wing 20. The fixing cage 30 mainly adopts biomedical materials, such as biomedical metal materials such as titanium alloy, cobalt-chromium alloy, stainless steel, iron alloy, zinc alloy, magnesium alloy, or bioactive or inert ceramic materials such as hydroxyapatite, bioactive glass, calcium phosphate, calcium silicate, zirconium oxide, aluminum oxide, silicon nitride, or biodegradable or non-degradable medical polymer materials such as polylactic acid, polyurethane, polyetheretherketone, etc. In addition, the surface of the fixing cage 30 can also be provided with components that are conducive to enhancing bone ingrowth performance, antibacterial performance, wear resistance, etc. through coating or surface treatment.

[0094] See also Fig.11 and Fig.12 The present application also provides an elbow joint replacement instrument, including a bone crushing limiter 200 and an elbow joint surgical instrument 100 of any of the above-mentioned embodiments. The bone crushing limiter 200 is detachably arranged on the head 10 and cooperates with the fixing cage 30 to limit the distribution position of the filling bone in the bone crushing groove 31.

[0095] By detachably arranging the bone-crushing stopper 200 on the head 10, the bone-crushing stopper 200 can be removed from the head 10. It can be understood that before the elbow joint surgical instrument 100 is implanted, the bone-crushing stopper 200 is removed from the head 10, and then the elbow joint surgical instrument 100 is implanted on the distal end of the humerus 300 of the patient.

[0096] Optionally, the bone crushing limiter 200 can be detachably arranged in the fixing groove 11, and the contour of the part of the bone crushing limiter 200 accommodated in the fixing groove is adapted to the fixing groove 11, effectively ensuring the stability of the bone crushing limiter 200 arranged in the fixing groove 11, so that the bone crushing limiter 200 can better cooperate with the fixing cage 30.

[0097] Specifically, when the bone crushing stopper 200 is detachably disposed on the head 10 , the bone crushing stopper 200 is disposed opposite to the fixing cage 30 , and the bone crushing stopper 200 blocks the side of the bone crushing groove 31 facing the fixing groove 11 .

[0098] The bone crushing limiter 200 cooperates with the fixing cage 30 to pressurize and shape the filling bone contained in the storage groove to adjust the distribution position of the filling bone, so that after the elbow joint surgical instrument 100 is implanted, the filling bone can fully and accurately fit with the osteotomy surface of the humerus 300, which is beneficial to accelerate the healing of the distal end of the humerus 300. In addition, before implantation, the doctor can use the bone crushing limiter 200 to compact the filling bone in the bone crushing groove 31 again to prevent the doctor from scattering and falling of the filling bone during the implantation process, which is convenient for the doctor to quickly implant the elbow joint surgical instrument 100 into the distal end of the humerus 300, and is also beneficial to the rapid fusion of the filling bone and the osteotomy surface of the humerus 300 after implantation.

[0099] Optionally, the number of the bone-breaking stoppers 200 may be one, two, three or more, and the design is specifically based on the complexity of the osteotomy surface of the affected humerus 300 and the convenience of the operation.

[0100] In some other embodiments, according to clinical use requirements, components such as Kirschner wires, screws or sutures can be used in conjunction with the fixation cage 30 to fix the filling bone in the placement slot.

[0101] Compared with the prior art, the elbow joint surgical instrument 100 provided in the present application adopts the above-mentioned elbow joint surgical instrument 100, thereby having any of the above-mentioned beneficial effects of the elbow joint surgical instrument 100. In addition, the bone crushing stopper 200 cooperates with the fixing cage 30 to limit the distribution position of the filling bone in the bone crushing groove 31, so that it is convenient for doctors to operate during implantation, and it is also helpful to accelerate the healing of the distal end of the patient's humerus 300. By detachably setting the bone crushing stopper 200 on the head 10, when the elbow joint surgical instrument 100 needs to be implanted, the implanted bone crushing stopper 200 can be removed from the head 10.

[0102] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An elbow joint surgical instrument (100), characterized in that: include: A head (10), wherein the head (10) is used to cover the surface of the distal end of the humerus (300); A fixing wing (20), the fixing wing (20) being connected to the side of the head (10) and used for connecting to the humerus (300); as well as A fixing cage (30), the fixing cage (30) being connected to the head (10) and forming a bone crushing groove (31) for accommodating the filling bone with the head (10), the fixing cage (30) also having a limiting structure (32) for cooperating with the bone tissue at the distal end of the humerus (300); A bone crushing limiting piece (200) is detachably arranged on the head (10) and cooperates with the fixing cage (30) to limit the distribution position of the filling bone in the bone crushing groove (31).

2. The elbow joint surgical instrument (100) according to claim 1, characterized in that: The limiting structure (32) is formed on the edge of the fixing cage (30), and the limiting structure (32) has a fitting surface (321) which is arranged away from the head (10) and is used to match and fit with the bone tissue at the distal end of the humerus (300).

3. The elbow joint surgical instrument (100) according to claim 2, characterized in that: The fitting surface (321) is a planar structure or a non-planar structure.

4. The elbow joint surgical instrument (100) according to claim 2, characterized in that: The fitting surface (321) is a rough surface.

5. The elbow joint surgical instrument (100) according to claim 1, characterized in that: The limiting structure (32) is formed on the edge of the fixing cage (30) and is used to surround the bone tissue at the distal end of the humerus (300).

6. The elbow joint surgical instrument (100) according to any one of claims 1 to 5, characterized in that: The fixing cage (30) is arranged on the edge of the head (10), and the fixing cage (30) is a curved surface.

7. The elbow joint surgical instrument (100) according to any one of claims 1 to 5, characterized in that: The fixing cage (30) is a hollow structure, and is provided with a plurality of hollow holes (33), wherein the diameter of the hollow holes (33) ranges from 0.5 mm to 10 mm, and the cross-sectional radial dimension of the connecting ribs (34) surrounding the hollow holes (33) ranges from 0.5 mm to 5 mm.

8. The elbow joint surgical instrument (100) according to any one of claims 1 to 5, characterized in that: The head (10) is provided with a fixing groove (11) for mounting the distal end of the humerus (300), and the bone crushing groove (31) is communicated with the fixing groove (11).

9. The elbow joint surgical instrument (100) according to any one of claims 8, characterized in that: The inner wall of the fixing groove (11) has a fusion structure or fusion material for promoting the healing of the distal osteotomy surface of the humerus (300).

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