Dissection locking and fixing device arranged on inner side of distal femur

Abstract

The utility model discloses a dissection locking and fixing device arranged on the inner side of the distal femur, and relates to the technical field of orthopedic supports, the dissection locking and fixing device comprises a plate body matched with the physiological curvature of the inner side of the distal femur, and the shape of the plate body is matched with the sagittal plane shape of the distal femur; a multi-axis locking screw hole matched with a multi-axis locking screw is formed in a first area for fixing the condyle portion of the plate body, fixing holes are formed in a second area for fixing the upper portion of the condyle portion of the plate body and a third area for fixing the bone shaft portion of the plate body, and the fixing pieces are matched with the fixing holes to fix the plate body. Kirschner wire holes are formed in the third area for fixing the bone shaft part and the first area for fixing the condyle part on the plate body, and the Kirschner wire holes are matched with Kirschner wires to fix the plate body. The plate body is matched with the physiological curvature of the inner side of the distal femur, and the shape of the plate body is matched with the sagittal plane shape of the distal femur, so that the plate-bone interface is firmly attached; the multi-axis locking screw holes are matched with the multi-axis locking screws, the screw placement direction can be adjusted, the multi-axis locking screws are prevented from being placed into the articular cavity, and firm and effective fixation is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of orthopedic brackets, and in particular to an anatomical locking fixation device placed on the inner side of the distal end of a femur. Background Art

[0002] Distal femoral fracture refers to fractures involving the distal femur within 9 cm, including the metaphysis or joint and the distal femoral epiphysis, accounting for about 6% of femoral fractures. The coronal plane of the distal femur is approximately a triangle. The condylar articular surface and the medial and lateral cortices form the three sides of the triangle. The triangle forms a stable supporting structure, which often splits the two condyles at the bottom of the stable triangle to form a T-shaped or Y-shaped fracture. The condyle is the junction of cortical bone and cancellous bone, which is prone to comminuted fractures. Due to the characteristics of the bone structure of the distal femoral fracture site, most fractures are comminuted and unstable fractures. The fracture is close to the knee joint and involves the articular surface. Once it is not fixed firmly or the internal fixation fails, it is easy to cause malunion or nonunion, affecting the movement of the knee joint. It is one of the most difficult fractures to treat.

[0003] At present, the lateral anatomical plates suitable for distal femoral fractures are very popular in clinical practice, but there is a lack of plates specifically used on the medial side of the distal femur. When the distal femoral fracture requires medial fixation, it can only be used after manual correction using plates from other parts. Due to the inappropriate shape of the plates, the plate-bone interface is often very unsatisfactory; and the direction of the screws changes after correction, and the screws are often placed in the joint cavity. On the other hand, due to the different anatomical structures of the distal femur of each person, the fractures of the distal femur are different, so it is often impossible to fix special fracture fragments, and strong and effective fixation cannot be achieved.

[0004] Therefore, how to avoid the extreme discomfort of the plate-bone interface, prevent the screws from being inserted into the joint cavity, and achieve strong and effective fixation is a problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of the present application is to provide an anatomical locking fixation device placed on the inner side of the distal femur, which is used to solve the problems of inappropriate shape of existing steel plates, often very poor fit of the plate-bone interface, change in the direction of the screws after correction, and the screws are often inserted into the joint cavity. In addition, due to the different anatomical structures of the distal femur of each person and different situations of distal femoral fractures, there is often an inability to fix special fracture fragments and an inability to achieve strong and effective fixation.

[0006] In order to solve the above technical problems, the present application provides an anatomical locking fixation device placed on the inner side of the distal femur, comprising: a plate, a multi-axial locking screw, a fixing member and a Kirschner wire;

[0007] The plate body is adapted to the physiological curvature of the inner side of the distal femur, and the shape of the plate body matches the sagittal shape of the distal femur. The first area of ​​the plate body used to fix the condyle is provided with a multiaxial locking screw hole adapted to the multiaxial locking screw. The second area of ​​the plate body used to fix the upper condyle and the third area of ​​the plate body used to fix the backbone are provided with fixing holes. The fixing member cooperates with the fixing holes to fix the plate body. The third area of ​​the plate body used to fix the backbone and the first area used to fix the condyle are both provided with Kirschner wire holes. The Kirschner wire holes cooperate with the Kirschner wire to fix the plate body.

[0008] Optionally, the plate body includes a first fixing plate, a first transition plate, a second fixing plate, a second transition plate, and a third fixing plate which are smoothly connected in sequence, the angle between the cut surface of the first fixing plate close to one end of the first transition plate and the cut surface of the second fixing plate close to one end of the first transition plate is 145°-155°, the angle between the cut surface of the second fixing plate close to one end of the second transition plate and the cut surface of the third fixing plate close to one end of the second transition plate is 130°-150°, and the angle between the cut surface of the third fixing plate away from one end of the second transition plate and the cut surface of the bottom of the medial condyle is 95°-110°.

[0009] Optionally, the first side edge of the plate body includes a first edge, a transition edge and a second edge, and an angle between a tangent line of one end of the first edge close to the transition edge and a tangent line of the second edge close to the transition edge is 145°-155°.

[0010] Optionally, a first region of the plate body for fixing the condyle is provided with a plurality of Kirschner wire holes, and the plurality of Kirschner wire holes are distributed along an edge of the first region.

[0011] Optionally, the fixing hole includes a uniaxial locking screw hole and a pressure screw hole, and the fixing member includes a uniaxial locking screw matched with the uniaxial locking screw hole and a pressure screw matched with the pressure screw hole.

[0012] Optionally, the uniaxial locking screw hole is provided in a third region of the plate body for fixing the backbone, and a plurality of the uniaxial locking screw holes are spaced apart along the length direction of the backbone.

[0013] Optionally, the pressure screw hole includes a first pressure screw hole and a second pressure screw hole, the first pressure screw hole is arranged on the plate body for fixing the third area of ​​the bone shaft, and the second pressure screw hole is arranged on the plate body for fixing the second area of ​​the upper part of the condyle.

[0014] Optionally, the diameter of the uniaxial locking screw hole is 4.0-5.0 mm, and the diameter of the multiaxial locking screw hole is 3.5-4.0 mm.

[0015] Optionally, there are multiple multi-axis locking screw holes.

[0016] Optionally, an edge of one end of the first fixing plate away from the first transition plate is arc-shaped.

[0017] The present application provides an anatomical locking fixation device placed on the inner side of the distal femur, comprising: a plate body, a multi-axial locking screw, a fixing piece and a Kirschner wire; the plate body is adapted to the physiological curvature of the inner side of the distal femur, the shape of the plate body matches the sagittal shape of the distal femur, a first area of ​​the plate body for fixing the condyle is provided with a multi-axial locking screw hole adapted to the multi-axial locking screw, a second area of ​​the plate body for fixing the upper condyle and a third area for fixing the diaphysis are provided with fixing holes, the fixing piece cooperates with the fixing holes to fix the plate body, the third area of ​​the plate body for fixing the diaphysis and the first area for fixing the condyle are both provided with Kirschner wire holes, and the Kirschner wire holes cooperate with the Kirschner wires to fix the plate body. Because the plate body is adapted to the physiological curvature of the inner side of the distal femur, and the shape of the plate body matches the sagittal shape of the distal femur, the plate-bone interface fits firmly, avoiding the discomfort caused by manual correction; the multi-axial locking screw hole is matched with the multi-axial locking screw, and the direction of the screw placement can be adjusted according to the size of the fracture fragment and the coronal sagittal position of the fracture line, so as to achieve individualized and precise fixation of the fracture fragment, avoid the multi-axial locking screw from being placed in the joint cavity, and achieve strong and effective fixation. Secondly, the Kirschner wire hole is matched with the Kirschner wire to facilitate temporary fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. 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 any creative work.

[0019] Figure 1 A schematic diagram of a sagittal plane of an anatomical locking fixation device provided in an embodiment of the present application placed on the inner side of the distal femur;

[0020] Figure 2 A coronal schematic diagram of an anatomical locking fixation device provided in an embodiment of the present application placed on the inner side of the distal femur;

[0021] The figure numbers are as follows: 1 is the plate body, 2 is the multi-axial locking screw hole, 3 is the Kirschner wire hole, 4 is the uniaxial locking screw hole, 5 is the compression screw hole, 6 is the distal end of the femur, 7 is the proximal end of the tibia, 8 is the multi-axial locking screw, 9 is the compression screw, 10 is the uniaxial locking screw, 101 is the first fixation plate, 102 is the first transition plate, 103 is the second fixation plate, 104 is the second transition plate, 105 is the third fixation plate, 501 is the first compression screw hole, 502 is the second compression screw hole, 601 is the condyle, 602 is the supracondylar part, 603 is the backbone, 901 is the first compression screw, and 902 is the second compression screw. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] The core of the present application is to provide an anatomical locking fixation device placed on the inner side of the distal femur to avoid extreme discomfort at the plate-bone interface, prevent screws from being inserted into the joint cavity, and achieve strong and effective fixation.

[0024] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] Figure 1 A schematic diagram of a sagittal plane of an anatomical locking fixation device provided in an embodiment of the present application placed on the inner side of the distal femur; Figure 2 A coronal schematic diagram of an anatomical locking fixation device provided in an embodiment of the present application placed on the inner side of the distal femur. Figure 1 and Figure 2 As shown, an anatomical locking fixation device placed on the inner side of the distal femur includes: a plate body 1, a multi-axial locking screw 8, a fixing piece and a Kirschner wire; the plate body 1 is adapted to the physiological curvature of the inner side of the distal femur 6, and the shape of the plate body 1 matches the sagittal shape of the distal femur 6, a first area of ​​the plate body 1 for fixing the condyle 601 is provided with a multi-axial locking screw hole 2 adapted to the multi-axial locking screw 8, a second area of ​​the plate body 1 for fixing the upper condyle 602 and a third area for fixing the backbone 603 are provided with fixing holes, and the fixing piece cooperates with the fixing holes to fix the plate body 1; the third area of ​​the plate body 1 for fixing the backbone 603 and the first area for fixing the condyle 601 are both provided with Kirschner wire holes 3, and the Kirschner wire holes 3 cooperate with the Kirschner wires to fix the plate body 1.

[0026] like Figure 1As shown, the distal end of the femur 6 includes a diaphysis 603, a supracondylar portion 602 and a condylar portion 601, and the proximal end of the tibia 7 is located below the distal end of the femur 6. Figure 2 As shown, the curvature of the plate body 1 matches the physiological curvature of the inner side of the distal end 6 of the femur, which can make the plate-bone interface fit firmly and avoid the discomfort caused by manual correction. Figure 1 As shown, the shape of the plate body 1 matches the sagittal shape of the distal end of the femur 6, one end of the plate body 1 is a narrow and long plate body, and the other end of the plate body 1 is larger than the narrow and long plate body to match the shape of the condyle 601. The first area of ​​the plate body 1 used to fix the condyle 601 is provided with a multiaxial locking screw hole 2 adapted to the multiaxial locking screw 8. Since the first area is adapted to the shape of the condyle 601, multiple multiaxial locking screw holes 2 can be set in the first area, thereby improving the firmness of the fixation of the plate body 1; in addition, the multiaxial locking screw 8 is matched with the multiaxial locking screw hole 2, and the insertion direction of the multiaxial locking screw 8 is variable. The screw placement direction of the multiaxial locking screw hole 8 can be adjusted according to the size of the fracture fragment, the coronal position and the sagittal position of the fracture line to avoid insertion into the joint cavity and achieve strong and effective fixation; wherein, the diameter of the multiaxial locking screw hole 2 is 3.5-4.0mm. There is no specific limitation on the fixing holes and the fixing parts adapted to the fixing holes provided on the second area of ​​the plate body 1 for fixing the condyle 602 and the third area for fixing the bone 603. The fixing holes include uniaxial locking screw holes 4 and / or pressure screw holes 5, etc. The third area of ​​the plate body 1 for fixing the bone 603 and the first area for fixing the condyle 601 are both provided with Kirschner wire holes 3. The Kirschner wire holes 3 cooperate with the Kirschner wires to temporarily fix the plate body 1 and the fracture fragment. The specific number of the Kirschner wire holes 3 can be set according to actual needs. Considering that the Kirschner wire holes 3 are usually designed at both ends of the plate body 1 to achieve temporary fixation through the Kirschner wires, the embodiment of the present application does not have an additional hole Kirschner wire in the second area of ​​the plate body 1 for fixing the condyle 602; wherein, the diameter of the Kirschner wire hole 3 is 1.5 mm.

[0027] An embodiment of the present application provides an anatomical locking fixation device placed on the inner side of the distal femur, comprising: a plate body, a multi-axial locking screw, a fixing piece and a Kirschner wire; the plate body is adapted to the physiological curvature of the inner side of the distal femur, the shape of the plate body matches the sagittal plane shape of the distal femur, a first area of ​​the plate body for fixing the condyle is provided with a multi-axial locking screw hole adapted to the multi-axial locking screw, a second area of ​​the plate body for fixing the upper condyle and a third area for fixing the diaphysis are provided with fixing holes, the fixing piece cooperates with the fixing holes to fix the plate body, the third area of ​​the plate body for fixing the diaphysis and the first area for fixing the condyle are both provided with Kirschner wire holes, and the Kirschner wire holes cooperate with the Kirschner wires to fix the plate body. Because the plate body is adapted to the physiological curvature of the inner side of the distal femur, and the shape of the plate body matches the sagittal shape of the distal femur, the plate-bone interface fits firmly, avoiding the discomfort caused by manual correction; the multi-axial locking screw hole is matched with the multi-axial locking screw, and the direction of the screw placement can be adjusted according to the size of the fracture fragment and the coronal sagittal position of the fracture line, so as to achieve individualized and precise fixation of the fracture fragment, avoid the multi-axial locking screw from being placed in the joint cavity, and achieve strong and effective fixation. Secondly, the Kirschner wire hole is matched with the Kirschner wire to facilitate temporary fixation.

[0028] Based on the above embodiments, the plate body of the embodiment of the present application includes a first fixed plate 101, a first transition plate 102, a second fixed plate 103, a second transition plate 104, and a third fixed plate 105 which are smoothly connected in sequence. The angle between the cut surface of the first fixed plate 101 close to one end of the first transition plate 102 and the cut surface of the second fixed plate 103 close to one end of the first transition plate 102 is 145°-155°, the angle between the cut surface of the second fixed plate 103 close to one end of the second transition plate 104 and the cut surface of the third fixed plate 105 close to one end of the second transition plate 104 is 130°-150°, and the angle between the cut surface of the third fixed plate 105 away from the second transition plate 104 and the cut surface of the bottom of the medial condyle is 95°-110°.

[0029] like Figure 2 As shown, for ease of understanding, the plate body 1 is divided into a first fixing plate 101, a first transition plate 102, a second fixing plate 103, a second transition plate 104 and a third fixing plate 105, and the first fixing plate 101, the first transition plate 102, the second fixing plate 103, the second transition plate 104 and the third fixing plate 105 are integrally connected. The edge of the end of the first fixing plate 101 away from the first transition plate 102 is arc-shaped, which can prevent the angular end from causing damage to the human body. Figure 2 As shown, angle A is about 145-155°, angle B is about 130-150°, and angle C is about 95-110°. The angles at each location are determined based on the physiological curvature of the inner side of the distal femur 6, so that the plate-bone interface fits securely and avoids discomfort caused by manual correction.

[0030] Further, such as Figure 1As shown, the first side edge of the plate body 1 includes a first edge, a transition edge, and a second edge. The angle between the tangent of the first edge close to the transition edge and the tangent of the second edge close to the transition edge is 145°-155°. Figure 1 As shown, the D angle is about 145-155°. The curvature of the first side edge of the plate body 1 is adapted to the physiological curvature of the posterior side of the distal femur 6, and the curvature of the second side edge of the plate body 1 opposite to the first side edge is adapted to the physiological curvature of the anterior side of the distal femur 6, so that the shape of the plate body 1 matches the sagittal shape of the distal femur 6, further making the plate-bone interface fit firmly.

[0031] Based on the above embodiments, in the embodiment of the present application, a first region of the plate body 1 for fixing the condyle 601 is provided with a plurality of K-wire holes 3, and the plurality of K-wire holes 3 are distributed along the edge of the first region.

[0032] The embodiment of the present application does not specifically limit the number of the Kirschner wire holes 3 provided on the third region of the plate body 1 for fixing the bone shaft 603. Figure 1 As shown, usually only one is provided. A plurality of Kirschner wire holes 3 are provided in the first area of ​​the plate body 1 for fixing the condyle 601, which can be used with the Kirschner wires to temporarily fix the plate body and the fracture fragment at different positions.

[0033] Based on the above embodiments, the fixing hole of the embodiment of the present application includes a uniaxial locking screw hole 4 and a pressure screw hole 5, and the fixing member includes a uniaxial locking screw 10 adapted to the uniaxial locking screw hole 4 and a pressure screw 9 adapted to the pressure screw 5 hole.

[0034] The required length of the plate body 1 is usually selected according to the position of the fracture line. The corresponding embodiment of the present application does not specifically limit the number of uniaxial locking screw holes 4, and 3 to 6 are usually set. The uniaxial locking screw hole 4 is provided in the third area of ​​the plate body 1 for fixing the backbone 603, and multiple uniaxial locking screw holes 4 are spaced apart along the length direction of the backbone 603. Multiple uniaxial locking screw holes 4 are spaced apart along the length direction of the backbone 603. When fixing, the corresponding uniaxial locking screw hole 4 can be selected as needed to insert the corresponding uniaxial locking screw 10, so as to ensure fixation at the proximal end of the fracture line. Among them, the diameter of the uniaxial locking screw hole 4 is 4.0-5.0mm.

[0035] The pressure screw hole 5 includes a first pressure screw hole 501 and a second pressure screw hole 502. The first pressure screw hole 501 is provided in the third area of ​​the plate body 1 for fixing the backbone 603, and the second pressure screw hole 502 is provided in the second area of ​​the plate body 1 for fixing the supracondylar part 602; accordingly, the pressure screw 9 includes a first pressure screw 901 and a second pressure screw 902. The pressure screw 9 is usually elliptical, and the shortest diameter of the first pressure screw hole 501 in the third area is 4.0-5.0 mm; the shortest diameter of the second pressure screw hole 502 in the second area is 3.5-4.0 mm. It should be noted that the number of pressure screw holes 5 is not limited to two. The first pressure screw hole 501 in the third area cooperates with the first pressure screw 901 to make the device fit more closely with the backbone 603. The second compression screw hole 502 on the second area can be used to insert screws avoiding the fracture line or perpendicular to the fracture line, and the direction of screw insertion can be adjusted according to the fracture type. In addition, a suitable screw insertion position can be selected in the compression screw hole 5, and the plate body 1 can be pressurized obliquely to make the plate body 1 fit tightly against the femoral condyle.

[0036] To better understand the present application, the following describes the method for using the anatomical locking fixation device placed on the inner side of the distal femur.

[0037] Through the longitudinal incision on the medial side of the knee joint, the surgical incision is parallel to the adductor tubercle, and the incision is extended proximally as needed. Cut the skin and subcutaneous tissue in turn, and perform blunt separation from the intermuscular space between the sartorius muscle and the vastus medialis muscle to protect important structures such as the adductor canal, expose the fracture area of ​​the distal femur 6, remove the hematoma and embedded soft tissue, and after flushing the incision, place the anatomical locking fixation device after the fracture is reduced to a satisfactory level. After the position is well-positioned, insert a 1.5mm Kirschner wire into the Kirschner wire hole 3 for temporary fixation. Observe the position of the device under fluoroscopy, and first insert the first compression screw into the first compression screw hole 501 of the plate body 1 corresponding to the bone 603. 901, on the one hand, pressurize the plate body 1 and the bone surface, on the other hand, the position of the two ends of the plate body 1 can be slid and fine-tuned. After the position of the plate body 1 is satisfactory, the second pressurized screw 902 is inserted into the second pressurized screw hole 502 of the plate body 1 corresponding to the upper condyle 602, so that the plate body 1 fits the medial condyle of the femur. Then, according to the type and distribution of the fracture fragments of the distal femur 6, the multi-axial locking screw 8 is used to fix the fracture fragments in sequence, and finally, the uniaxial locking screw 10 is inserted into the uniaxial locking screw hole 4 of the plate body 1 corresponding to the bone 603 in sequence. The C-arm machine is used to observe the position of the plate body 1 and the alignment of the bone fragments. After the position is satisfactory and the alignment of the bone fragments is good, the incision is flushed and closed after sufficient hemostasis.

[0038] Based on this, the anatomical locking fixation device placed on the inner side of the distal femur provided in the embodiment of the present application has the following advantages: (1) The plate body is designed according to the anatomical structure of the inner side of the distal femur, with an A angle of about 145-155°, a B angle of about 130-150°, a C angle of about 95-110°, and a D angle of about 145-155°, so that the plate-bone interface fits firmly and avoids the discomfort caused by manual correction. (2) The bone shaft corresponding to the plate body is provided with a first pressure screw hole with a diameter of 4.0-5.0 mm, which can not only move the plate body up and down through the first pressure screw hole, but also can be horizontally pressurized and fixed, so that the plate body fits more closely with the femoral shaft. (3) The condyle corresponding to the plate is provided with a second compression screw hole with a diameter of 3.5-4.0 mm, which can be used to avoid the fracture line or insert the second compression screw perpendicular to the fracture line. The direction of screw insertion can be adjusted according to the fracture type. In addition, a suitable screw insertion position can be selected in the second compression screw to fix the plate in an oblique direction, so that the plate fits tightly with the femoral condyle. (4) The condyle corresponding to the plate includes 5 Kirschner wire holes with a diameter of 1.5 mm distributed in different areas, which can temporarily fix the plate and fracture fragments from different positions in the front, back and distal ends. The condyle corresponding to the plate also includes a multi-axial locking screw hole, which can adjust the screw insertion direction according to the size of the fracture fragment and the coronal and sagittal position of the fracture line, so as to achieve individualized and precise fixation of the fracture fragment, avoid the multi-axial locking screw from being inserted into the joint cavity, and achieve strong and effective fixation.

[0039] The above is a detailed introduction to an anatomical locking fixation device placed on the inner side of the distal femur provided by the present application. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

[0040] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. An anatomical locking fixation device placed on the inner side of the distal femur, characterized in that: include: A plate body (1), a multiaxial locking screw (8), a fixing member and a Kirschner wire; The plate body (1) is adapted to the physiological curvature of the inner side of the distal end of the femur (6); the shape of the plate body (1) matches the sagittal shape of the distal end of the femur (6); a first area of ​​the plate body (1) for fixing the condyle (601) is provided with a multiaxial locking screw hole (2) adapted to the multiaxial locking screw (8); a second area of ​​the plate body (1) for fixing the upper part of the condyle (602) and a third area for fixing the bone stem (603) are provided with fixing holes; the fixing member cooperates with the fixing holes to fix the plate body (1); the third area of ​​the plate body (1) for fixing the bone stem (603) and the first area for fixing the condyle (601) are both provided with Kirschner wire holes (3); the Kirschner wire holes (3) cooperate with the Kirschner wires to fix the plate body (1).

2. The anatomical locking fixation device placed on the inner side of the distal femur according to claim 1, characterized in that: The plate body (1) comprises a first fixing plate (101), a first transition plate (102), a second fixing plate (103), a second transition plate (104), and a third fixing plate (105) which are smoothly connected in sequence, wherein an angle between a section of the first fixing plate (101) close to one end of the first transition plate (102) and a section of the second fixing plate (103) close to one end of the first transition plate (102) is 145°-155°, an angle between a section of the second fixing plate (103) close to one end of the second transition plate (104) and a section of the third fixing plate (105) close to one end of the second transition plate (104) is 130°-150°, and an angle between a section of the third fixing plate (105) away from one end of the second transition plate (104) and a section of the bottom of the medial condyle is 95°-110°.

3. The anatomical locking fixation device placed on the inner side of the distal femur according to claim 1, characterized in that: The first side edge of the plate body (1) comprises a first edge, a transition edge and a second edge, and the angle between a tangent line of one end of the first edge close to the transition edge and a tangent line of one end of the second edge close to the transition edge is 145°-155°.

4. The anatomical locking fixation device placed on the inner side of the distal femur according to claim 1, characterized in that: A first region of the plate body (1) for fixing the condyle (601) is provided with a plurality of Kirschner wire holes (3), and the plurality of Kirschner wire holes (3) are distributed along the edge of the first region.

5. The anatomical locking fixation device placed on the inner side of the distal femur according to claim 1, characterized in that: The fixing hole comprises a uniaxial locking screw hole (4) and a pressurizing screw hole (5), and the fixing member comprises a uniaxial locking screw (10) matched with the uniaxial locking screw hole (4) and a pressurizing screw (9) matched with the pressurizing screw hole (5).

6. The anatomical locking fixation device placed on the inner side of the distal femur according to claim 5, characterized in that: The uniaxial locking screw hole (4) is arranged in a third area of ​​the plate body (1) for fixing the backbone (603), and a plurality of the uniaxial locking screw holes (4) are spaced apart along the length direction of the backbone (603).

7. The anatomical locking fixation device placed on the inner side of the distal femur according to claim 5, characterized in that: The pressure screw hole (5) includes a first pressure screw hole (501) and a second pressure screw hole (502), wherein the first pressure screw hole (501) is arranged on the plate body (1) in a third area for fixing the bone shaft (603), and the second pressure screw hole (502) is arranged on the plate body (1) in a second area for fixing the supracondylar part (602).

8. The anatomical locking fixation device placed on the inner side of the distal femur according to claim 5, characterized in that: The diameter of the uniaxial locking screw hole (4) is 4.0-5.0 mm, and the diameter of the multiaxial locking screw hole (2) is 3.5-4.0 mm.

9. The anatomical locking fixation device placed on the inner side of the distal femur according to any one of claims 1 to 8, characterized in that: The number of the multi-axis locking screw holes (2) is multiple.

10. The anatomical locking fixation device placed on the inner side of the distal femur according to claim 2, characterized in that: An edge of one end of the first fixing plate (101) away from the first transition plate (102) is arc-shaped.

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