A special-shaped block for the proximal lateral side of the tibia
By designing the smooth inner and outer surface and special curvature of the lateral tibia proximal tibia, combined with the multi-point and multi-angle fixation design, the problem of soft tissue stripping and insufficiency in traditional tibial fracture treatment is solved, achieving higher biocompatibility and fixation Firmness reduces complications and patient discomfort.
Patent Information
- Application Number
- CN201911370378.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-12-26
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2039-12-26
AI Technical Summary
Traditional tibial fracture treatment methods require extensive stripping of soft tissue and periosteum, resulting in complications such as difficulty in healing, skin infection and internal fixation exposure. In addition, traditional steel plates and screws cannot effectively fix multiple pulverized fracture blocks, resulting in bone atrophy and joint stiffness.
Design a lateral tibial proximal tibial block with smooth inner and outer surfaces and special curvature. Through multi-point and multi-angle fixation design, it improves adhesion and biocompatibility, reduces the number of bone nails required, and reduces the patient's discomfort. And a firmer fixation is achieved through the arc-shaped surface and locking screw hole structure.
The shaped block improves biocompatibility and fixation firmness, reduces patient discomfort, and extends service life, avoids complications in traditional methods, and achieves stable fixation of multiple fracture blocks.
Smart Images
Figure CN110897702B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of orthopedic medical instruments, and in particular to a proximal lateral tibial special-shaped block. Background Art
[0002] Tibial fracture is a common type of fracture, especially prone to occur in young people and elderly patients with osteoporosis. The treatment of distal tibia fractures has always been controversial.
[0003] Regarding the selection of fixation materials and methods for tibial fractures, the surgical method emphasizes meticulous soft tissue exposure, limited stripping of fracture fragments, and indirect reduction. However, traditional open reduction and internal fixation requires extensive stripping of soft tissue and periosteum, which not only affects fracture healing, but also increases complications such as skin infection, necrosis, and internal fixation exposure. Traditional steel plates are nearly straight in shape, large in size, and have great stimulation to soft tissues. They cannot fix multiple comminuted fracture fragments. Screws are fixed in a single direction with poor fixation firmness. They cannot fix multiple fracture fragments at the same time. External fixation protection is required for a long time after surgery, which can easily cause bone atrophy and joint stiffness, affecting the prognosis of the fracture. Summary of the invention
[0004] The purpose of the present invention is to provide a proximal lateral tibial special-shaped block, the inner and outer surfaces of which are designed to be smooth and have a special curvature, are easier to adhere to the tibia, have better coverage, and the smooth surface is conducive to improving biocompatibility, extending service life, reducing the number of bone screws required, and alleviating patient discomfort.
[0005] To achieve the above object, the present invention provides a proximal lateral tibial special-shaped block, the proximal lateral tibial special-shaped block specifically comprising: a first fixing portion and a second fixing portion, the first fixing portion and the second fixing portion being connected:
[0006] The inner surface of the first fixing part is an arcuate surface, which matches the curved surface of the upper end of the outer side of the tibia and is used to be fixed on the outer side of the tibia; the first fixing part includes:
[0007] The front top locking screw hole is located at the top front side of the first fixing portion. When the first locking screw passes through the front top locking screw hole, the first upper screw connection portion of the first locking screw is screwed with the front top locking screw hole. The vertical inclination angle of the normal to the plane where the first locking screw and the second fixing portion are located is a first vertical inclination angle; the horizontal inclination angle of the normal to the plane where the first locking screw and the second fixing portion are located is a first horizontal inclination angle.
[0008] a middle top locking screw hole, located at the middle position of the top of the first fixing portion; when the second locking screw passes through the middle top locking screw hole, the second upper screw connection portion of the second locking screw is screwed with the middle top locking screw hole; a vertical inclination angle between the second locking screw and the normal to the plane where the second fixing portion is located is a second vertical inclination angle; a horizontal inclination angle between the second locking screw and the normal to the plane where the second fixing portion is located is a second horizontal inclination angle;
[0009] The rear top locking screw hole is located at the top rear side of the first fixing portion. When the third locking screw passes through the rear top locking screw hole, the third upper screw connection portion of the third locking screw is screwed with the rear top locking screw hole. The vertical inclination angle of the third locking screw and the normal of the plane where the second fixing portion is located is a third vertical inclination angle; the horizontal inclination angle of the third locking screw and the normal of the plane where the second fixing portion is located is a third horizontal inclination angle.
[0010] The first oblique locking screw hole is located in the middle of the first fixing portion. When the fourth locking screw passes through the first oblique locking screw hole, the fourth upper screw-connecting portion of the fourth locking screw is screwed with the first oblique locking screw hole. The vertical inclination angle of the fourth locking screw and the normal of the plane where the second fixing portion is located is a fourth vertical inclination angle; the horizontal inclination angle of the fourth locking screw and the normal of the plane where the second fixing portion is located is a fourth horizontal inclination angle; the fourth vertical inclination angle intersects the first vertical inclination angle, the second vertical inclination angle and the third vertical inclination angle respectively.
[0011] a lower locking screw hole, located at the lower part of the first fixing part; when the fifth locking screw passes through the lower locking screw hole, the fifth upper screw-connecting part of the fifth locking screw is screwed with the lower locking screw hole; a vertical inclination angle between the fifth locking screw and the normal to the plane where the second fixing part is located is a fifth vertical inclination angle; a horizontal inclination angle between the fifth locking screw and the normal to the plane where the second fixing part is located is a fifth horizontal inclination angle;
[0012] The second fixing portion includes:
[0013] A locking screw hole, located on the surface of the second fixing portion;
[0014] A front connecting screw hole is located at the front side of the side surface of the second fixing portion, and the hole diameter of the front connecting screw hole is a first hole diameter;
[0015] A rear connecting screw hole is located at the rear side of the side surface of the second fixing portion, and the hole diameter of the rear connecting screw hole is the second hole diameter;
[0016] The first connecting rod is inserted into the front connecting screw hole, and the second connecting rod is inserted into the rear connecting screw hole. When the sixth locking screw passes through the locking screw hole, the sixth upper threaded portion of the sixth locking screw is threadedly connected to the locking screw hole, thereby squeezing the front connecting screw hole and the rear connecting screw hole to fix the first connecting rod and the second connecting rod to the second fixing portion.
[0017] Preferably, the first vertical inclination angle, the second vertical inclination angle and the third vertical inclination angle are equal.
[0018] Preferably, the first horizontal inclination angle is equal to the fourth horizontal inclination angle.
[0019] Preferably, the first vertical inclination angle, the second vertical inclination angle and the third vertical inclination angle are in a range of 6 to 10°, the fourth vertical inclination angle is in a range of 30 to 35°, and the fifth vertical inclination angle is in a range of 12 to 17°.
[0020] Preferably, the first horizontal inclination angle and the fourth horizontal inclination angle range from 10 to 15°, the second horizontal inclination angle range from 10 to 14°, the third horizontal inclination angle range from 5 to 10°, and the fifth horizontal inclination angle range from 18 to 23°.
[0021] Preferably, the curvature radius of the bottom edge of the horizontal section of the top of the first fixing portion is R1, and the value range of R1 is 25 to 30 mm;
[0022] The curvature radius of the bottom edge of the horizontal section of the first fixing portion between the first oblique locking screw hole and the lower locking screw hole is R2, and the value range of R2 is 60 to 65 mm.
[0023] Preferably, the first fixing portion further includes a positioning hole;
[0024] The positioning hole is located at the top end of the first fixing portion close to the edge and is used for temporarily fixing the special-shaped block or threading sutures or cables during surgery.
[0025] Preferably, the first aperture of the front connecting screw hole and the second aperture of the rear connecting screw hole are equal or different.
[0026] The embodiment of the present invention provides a proximal lateral tibial special-shaped block, whose inner and outer surfaces are designed to be smooth and have a special curvature, and a multi-point and multi-angle fixation design to improve adhesion and covering properties, and strong biocompatibility, thereby reducing the patient's discomfort while providing a more secure fixation. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 A top view of the proximal lateral tibial special-shaped block provided by an embodiment of the present invention;
[0028] Figure 2 A side view of the proximal lateral tibial shaped block provided by an embodiment of the present invention (I);
[0029] Figure 3 A side view of the lateral shaped block of the proximal tibia provided by an embodiment of the present invention (II);
[0030] Figure 4 for Figure 1 Sectional view of the AA section;
[0031] Figure 5 for Figure 1 Cross-section of the middle BB section;
[0032] Figure 6 for Figure 1 Cross-section of the CC section. DETAILED DESCRIPTION
[0033] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments.
[0034] An embodiment of the present invention provides a proximal lateral tibial special-shaped block, which is used for fixing the fracture site in tibial fracture surgery.
[0035] Figure 1 The top view of the proximal lateral tibial shaped block provided in the embodiment of the present invention is shown in the figure. The proximal lateral tibial shaped block in the embodiment of the present invention is a plate-like structure, and the proximal lateral tibial shaped block specifically includes: a first fixing portion 61 and a second fixing portion 62.
[0036] The first fixing portion 61 and the second fixing portion 62 are connected and formed as one piece.
[0037] Preferably, in this embodiment, the plane where the second fixing portion 62 is located is set as the first plane, the plane parallel to the horizontal direction of the normal to the first plane is set as the second plane, and the plane parallel to the vertical direction of the normal to the first plane is set as the third plane; the side of the first fixing portion 61 parallel to the long side of the proximal lateral shaped block of the tibia is defined as the front side of the proximal lateral shaped block of the tibia, extending from the long side to the short side, and the end side of the short side of the first fixing portion 61 is defined as the rear side of the proximal lateral shaped block of the tibia.
[0038] The outer surface of the first fixing part 61 is an arc-shaped surface with a certain curvature, and a plurality of locking screw holes and circular holes are arranged on the arc-shaped surface along the short side direction of the first fixing part 61. The inner surface of the first fixing part 61 is an arc-shaped surface, which is adapted to the curved surface of the upper end of the outer side of the tibia. The first fixing part 61 is fixed to the bone surface of the outer side of the tibia by a locking screw.
[0039] The first fixing portion 61 specifically includes: a front top locking screw hole 610 , a middle top locking screw hole 611 , a rear top locking screw hole 612 , a first oblique locking screw hole 613 , a lower locking screw hole 614 and a positioning hole 615 .
[0040] The front top locking screw hole 610 is located at the top front side of the first fixing part 61. The interior of the front top locking screw hole 610 is specifically composed of an upper edge part and a lower edge part. The surface of the upper edge part is a smooth curved surface, and the surface of the lower edge part is provided with a fastening thread. The front top locking screw hole 610 is used to fit the inner surface of the first fixing part 61 to the bone surface of the upper end of the lateral side of the tibia and fix it on its surface through a locking screw;
[0041] In a specific embodiment, after the first locking screw passes through the front top locking screw hole 610, the first upper threaded portion of the first locking screw is screwed into the lower edge of the front top locking screw hole 610. As the first upper threaded portion is screwed and tightened with the fastening thread, the screw cap portion of the first locking screw stays in the upper edge of the front top locking screw hole 610. The screw shaft and the nail head of the first locking screw are respectively passed through the front top locking screw hole 610 and implanted into the bone. During the implantation process, the inclination angle formed by the first locking screw and the third plane is the first vertical inclination angle α, and the first vertical inclination angle α ranges from 6 to 10°; the inclination angle formed by the first locking screw and the second plane is the first horizontal inclination angle α′, and the first horizontal inclination angle α′ ranges from 10 to 15°.
[0042] The middle top locking screw hole 611 is located at the middle of the top of the first fixing portion 61, between the front top locking screw hole 610 and the rear top locking screw hole 612. Similarly, the interior of the middle top locking screw hole 611 has an upper edge and a lower edge like the interior of the front top locking screw hole 610. The function of the middle top locking screw hole 611 is the same as that of the front top locking screw hole 610.
[0043] In a specific embodiment, after the second locking screw passes through the median top locking screw hole 611, the second upper threaded portion of the second locking screw is screwed into the lower edge of the median top locking screw hole 611. As the second upper threaded portion is screwed and tightened with the fastening thread, the screw cap portion of the second locking screw stays in the upper edge of the median top locking screw hole 611. The screw shaft portion and the nail head portion of the second locking screw are respectively passed through the median top locking screw hole 611 and implanted into the bone. During the implantation process, the inclination angle formed by the second locking screw and the third plane is the second vertical inclination angle β; the inclination angle formed by the second locking screw and the second plane is the second horizontal inclination angle β′, and the second horizontal inclination angle β′ ranges from 10 to 14°.
[0044] The rear top locking screw hole 612 is located at the top rear side of the first fixing portion 61. Similarly, the interior of the rear top locking screw hole 612 has an upper edge and a lower edge like the interior of the front top locking screw hole 610. The function of the rear top locking screw hole 612 is the same as that of the front top locking screw hole 610.
[0045] In a specific embodiment, after the third locking screw is passed through the rear top locking screw hole 612, the third upper threaded portion of the third locking screw is screwed into the lower edge of the rear top locking screw hole 612. As the third upper threaded portion is screwed and tightened with the fastening thread, the screw cap portion of the third locking screw stays in the upper edge of the rear top locking screw hole 612. The screw shaft portion and the nail head portion of the third locking screw are respectively passed through the rear top locking screw hole 612 and implanted into the bone. During the implantation process, the inclination angle formed by the third locking screw and the third plane is the third vertical inclination angle γ; the inclination angle formed by the third locking screw and the second plane is the third horizontal inclination angle γ′, and the third horizontal inclination angle γ′ is in the range of 5 to 10°.
[0046] The first oblique locking screw hole 613 is located in the middle of the first fixing portion 61. Similarly, the interior of the first oblique locking screw hole 613 has an upper edge and a lower edge like the interior of the front top locking screw hole 610. The function of the first oblique locking screw hole 613 is the same as that of the front top locking screw hole 610.
[0047] In a specific embodiment, after the fourth locking screw passes through the first oblique locking screw hole 613, the fourth upper threaded portion of the fourth locking screw is screwed into the lower edge of the first oblique locking screw hole 613. As the fourth upper threaded portion is screwed and tightened with the fastening thread, the screw cap portion of the fourth locking screw stays in the upper edge of the first oblique locking screw hole 613, and the screw shaft and the nail head of the fourth locking screw are respectively passed through the first oblique locking screw hole 613 and implanted into the bone. During the implantation process, the inclination angle formed by the fourth locking screw and the third plane is the fourth vertical inclination angle δ, and the fourth vertical inclination angle δ ranges from 30 to 35°. The fourth vertical inclination angle δ intersects with the first vertical inclination angle α, the second vertical inclination angle β and the third vertical inclination angle γ, respectively; the inclination angle formed by the fourth locking screw and the second plane is the fourth horizontal inclination angle δ′.
[0048] like Figure 2 As shown, the first vertical inclination angle α, the second vertical inclination angle β and the third vertical inclination angle γ are the same; Figure 3 As shown, the first horizontal inclination angle α′ and the fourth horizontal inclination angle δ′ are equal.
[0049] The lower locking screw hole 614 is located at the lower part of the first fixing part 61. Similarly, the interior of the lower locking screw hole 614 has an upper edge and a lower edge like the interior of the front top locking screw hole 610. The function of the lower locking screw hole 614 is the same as that of the front top locking screw hole 610.
[0050] In a specific embodiment, after the fifth locking screw passes through the lower locking screw hole 614, the fifth upper threaded portion of the fifth locking screw is screwed into the lower edge of the lower locking screw hole 614. As the fifth upper threaded portion is screwed and tightened with the fastening thread, the screw cap portion of the fifth locking screw stays in the upper edge of the lower locking screw hole 614, and the screw shaft and the nail head of the fifth locking screw are respectively passed through the lower locking screw hole 614 and implanted into the bone. During the implantation process, the inclination angle formed by the fifth locking screw and the third plane is the fifth vertical inclination angle ε, and the fifth vertical inclination angle ε is in the range of 12 to 17°; the inclination angle formed by the fifth locking screw and the second plane is the fifth horizontal inclination angle ε′, and the fifth horizontal inclination angle ε′ is in the range of 18 to 23°.
[0051] like Figure 2 As shown, the fourth vertical inclination angle δ is greater than the first vertical inclination angle α, the second vertical inclination angle β, the third vertical inclination angle γ and the fifth vertical inclination angle ε; Figure 3 As shown, the fifth horizontal inclination angle ε′ is greater than the first horizontal inclination angle α′, the second horizontal inclination angle β′, the third horizontal inclination angle γ′ and the fourth horizontal inclination angle δ′.
[0052] The positioning hole 615 is composed of a circular hole and is located at the middle of the top of the first fixing part 71 close to the front end of the first fixing part 61, specifically including a first positioning hole 6150 and a second positioning hole 6151; wherein the first positioning hole 6150 is located between the front top locking screw hole 610 and the middle top locking screw hole 611, and the second positioning hole 6151 is located between the middle top locking screw hole 611 and the rear top locking screw hole 612. The aperture of the positioning hole 615 is smaller than the aperture of the locking screw hole. The positioning hole 615 is used for temporarily fixing special-shaped blocks or threading sutures or cables during surgery.
[0053] Figure 5 for Figure 1 The cross-section of the middle BB part, Figure 6 for Figure 1 Cross-section of the CC section; combined Figure 5 and Figure 6 As shown, the radius of curvature of the arc-shaped surface extending from the top to the middle of the inner surface of the first fixing portion 61 gradually increases. Specifically, the radius of curvature of the bottom edge of the horizontal section at the top of the first fixing portion 61 is R, and the value range is 25 to 30 mm; the radius of curvature of the bottom edge of the horizontal section between the first oblique locking screw hole 613 and the lower locking screw hole 614 is R2, and the value range is 60 to 65 mm.
[0054] Figure 4 for Figure 1 The cross-section of the AA section, combined with Figure 1 and Figure 4 As shown, the outer surface of the second fixing portion 62 is set to be an arc-shaped surface with a certain curvature, and two adjacent locking screw holes 620 are set in the arc-shaped surface, and are set at a certain distance along the long axis direction of the second fixing portion 62. The interior of the locking screw hole 620 is specifically composed of an upper edge 6201 and a lower edge 6202. The surface of the upper edge 6201 is a smooth curved surface that matches the upper screw connection portion of the locking screw, and the surface of the lower edge 6202 is provided with a fastening thread. An intermediate groove 623 is provided between the upper edge 6201 and the lower edge 6202. The aperture of the locking screw hole 620 is the same as that of the locking screw hole; the portion where the inner surface of the second fixing portion 62 fits the tibial shaft is the same. It is set to an arc-shaped surface with a certain curvature. According to different patients and different fracture sites, the curvature of the inner surface of the arc-shaped surface of the second fixing part 62 can be adapted so that the proximal lateral shaped block of the tibia fits the tibia surface more closely; the side surfaces of the second fixing part 62 are respectively provided with a front connecting screw hole 621 and a rear connecting screw hole 622, the front connecting screw hole 621 and the rear connecting screw hole 622 are arranged parallel to the long axis direction of the second fixing part 62, and are respectively located on both sides of the locking screw hole 620, the front connecting screw hole 621 and the rear connecting screw hole 622 are used to firmly connect the connecting rod to the proximal lateral shaped block of the tibia through a locking screw.
[0055] The front connecting screw hole 621 is located at the front side of the side of the second fixing portion 62, and the aperture of the front connecting screw hole 621 is the first aperture D1;
[0056] The rear connecting screw hole 622 is located at the rear side of the side of the second fixing portion 62, and the aperture of the rear connecting screw hole 622 is the second aperture D2;
[0057] The first aperture D1 and the second aperture D2 are equal or different, and the apertures of the front connecting screw hole 621 and the rear connecting screw hole 622 are set to be different in order to be more in line with the bone shape and characteristics of Asians.
[0058] A cross hole 624 is formed at the intersection of the front connecting screw hole 621 and the rear connecting screw hole 622 with the locking screw hole 620 in the second fixing portion 62 . The cross hole 624 is mainly used to squeeze the connecting rod through the locking screw, so as to fix the connecting rod in the second fixing portion 62 .
[0059] In a specific embodiment, the first connecting rod 20 is inserted into the front connecting screw hole 621, and the second connecting rod 21 is inserted into the rear connecting screw hole 622. After the two sixth locking screws are respectively passed through two adjacent locking screw holes 620, the sixth upper threaded portion of the sixth locking screw is screwed into the lower edge of the locking screw hole 620. As the sixth upper threaded portion is screwed and tightened with the fastening thread, the gap in the middle groove 623 is further compressed, and the screw cap portion of the sixth locking screw stays in the upper edge of the locking screw hole 620, squeezing the front connecting screw hole 621 and the rear connecting screw hole 622 respectively, while fixing the first connecting rod 20 and the second connecting rod 21 to the second fixing portion 62 through the cross hole 624. The screw portion and the nail head portion of the sixth locking screw are respectively passed through the locking screw hole 620 and implanted into the bone.
[0060] The above is an introduction to the various components of the proximal lateral tibial special-shaped block provided in the embodiment of the present invention and the connection relationship between them. Figure 1 and Figure 4 , the use of the proximal lateral tibial shaped block is described in detail;
[0061] When doctors use the proximal tibial lateral shaped block to fix the fracture site during tibial fracture surgery, locking screws and connecting rods need to be used together. The following is a detailed description of the process of combined use.
[0062] During a specific tibial fracture surgery, the doctor aligns and fits the first fixing portion 61 of the proximal lateral tibial special-shaped block with the bone surface of the upper end of the lateral side of the tibia, and respectively inserts the locking screws into the front top locking screw hole 610, the middle top locking screw hole 611 and the rear top locking screw hole 612. After the locking screws are inserted into the locking screw holes, the upper threaded portion of the locking screw is screwed into the lower edge of the locking screw hole. As the upper threaded portion is screwed and tightened with the fastening thread, the screw cap portion of the locking screw stays in the upper edge of the locking screw hole, and the screw rod portion and the nail head portion of the locking screw are respectively inserted through the locking screw holes and implanted into the bone. Finally, the first fixing portion 61 of the proximal lateral tibial special-shaped block is fixed to the bone surface of the lateral side of the tibia, and the first connecting rod 20 and the second connecting rod 21 are respectively inserted into the front connecting screw hole 621 in sequence. and the rear connecting screw hole 622, and the locking screws are respectively passed through the two adjacent locking screw holes 620. After the locking screw passes through the locking screw hole 620, the upper threaded portion of the locking screw is screwed with the lower edge 6202 of the locking screw hole 620. As the upper threaded portion is screwed and tightened with the fastening thread, the screw cap portion of the locking screw stays in the upper edge 6201 of the locking screw hole 620, and the gap of the middle groove 623 is further compressed. The locking screw squeezes the front connecting screw hole 621 and the rear connecting screw hole 622 respectively, and at the same time, the first connecting rod 20 and the second connecting rod 21 are fixed to the second fixing portion 62 through the cross hole 624. The screw portion and the nail head of the locking screw are respectively passed through the locking screw hole 620 and implanted into the bone. At this point, the lateral special-shaped block of the proximal tibia is completely fixed to the proximal tibia.
[0063] The embodiment of the present invention provides a proximal lateral tibial special-shaped block, whose inner and outer surfaces are designed to be smooth and have a special curvature, and a multi-point and multi-angle fixation design to improve adhesion and covering properties, and strong biocompatibility, thereby reducing the patient's discomfort while providing a more secure fixation.
[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiment, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiment or to replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A proximal lateral tibial special-shaped block, characterized in that: The tibial proximal lateral shaped block specifically comprises: a first fixing portion and a second fixing portion, wherein the first fixing portion and the second fixing portion are connected: The inner surface of the first fixing part is an arcuate surface, which matches the curved surface of the upper end of the outer side of the tibia and is used to be fixed on the outer side of the tibia; the first fixing part includes: The front top locking screw hole is located at the top front side of the first fixing portion. When the first locking screw passes through the front top locking screw hole, the first upper screw connection portion of the first locking screw is screwed with the front top locking screw hole. The vertical inclination angle of the normal to the plane where the first locking screw and the second fixing portion are located is a first vertical inclination angle; the horizontal inclination angle of the normal to the plane where the first locking screw and the second fixing portion are located is a first horizontal inclination angle. a middle top locking screw hole, located at the middle position of the top of the first fixing portion; when the second locking screw passes through the middle top locking screw hole, the second upper screw connection portion of the second locking screw is screwed with the middle top locking screw hole; a vertical inclination angle between the second locking screw and the normal to the plane where the second fixing portion is located is a second vertical inclination angle; a horizontal inclination angle between the second locking screw and the normal to the plane where the second fixing portion is located is a second horizontal inclination angle; The rear top locking screw hole is located at the top rear side of the first fixing portion. When the third locking screw passes through the rear top locking screw hole, the third upper screw connection portion of the third locking screw is screwed with the rear top locking screw hole. The vertical inclination angle of the third locking screw and the normal of the plane where the second fixing portion is located is a third vertical inclination angle; the horizontal inclination angle of the third locking screw and the normal of the plane where the second fixing portion is located is a third horizontal inclination angle. The first oblique locking screw hole is located in the middle of the first fixing portion. When the fourth locking screw passes through the first oblique locking screw hole, the fourth upper screw-connecting portion of the fourth locking screw is screwed with the first oblique locking screw hole. The vertical inclination angle of the fourth locking screw and the normal of the plane where the second fixing portion is located is a fourth vertical inclination angle; the horizontal inclination angle of the fourth locking screw and the normal of the plane where the second fixing portion is located is a fourth horizontal inclination angle; the fourth vertical inclination angle intersects the first vertical inclination angle, the second vertical inclination angle and the third vertical inclination angle respectively. a lower locking screw hole, located at the lower part of the first fixing part; when the fifth locking screw passes through the lower locking screw hole, the fifth upper screw-connecting part of the fifth locking screw is screwed with the lower locking screw hole; a vertical inclination angle between the fifth locking screw and the normal to the plane where the second fixing part is located is a fifth vertical inclination angle; a horizontal inclination angle between the fifth locking screw and the normal to the plane where the second fixing part is located is a fifth horizontal inclination angle; The second fixing portion includes: A locking screw hole, located on the surface of the second fixing portion; A front connecting screw hole is located at the front side of the side surface of the second fixing portion, and the hole diameter of the front connecting screw hole is a first hole diameter; A rear connecting screw hole is located at the rear side of the side surface of the second fixing portion, and the hole diameter of the rear connecting screw hole is the second hole diameter; The first connecting rod is inserted into the front connecting screw hole, and the second connecting rod is inserted into the rear connecting screw hole. When the sixth locking screw passes through the locking screw hole, the sixth upper screw connection portion of the sixth locking screw is screwed with the locking screw hole, thereby squeezing the front connecting screw hole and the rear connecting screw hole to fix the first connecting rod and the second connecting rod with the second fixing portion. The first vertical inclination angle, the second vertical inclination angle and the third vertical inclination angle are in the range of 6 to 10°, the fourth vertical inclination angle is in the range of 30 to 35°, and the fifth vertical inclination angle is in the range of 12 to 17°; The first horizontal inclination angle and the fourth horizontal inclination angle range from 10 to 15°, the second horizontal inclination angle range from 10 to 14°, the third horizontal inclination angle range from 5 to 10°, and the fifth horizontal inclination angle range from 18 to 23°; The curvature radius of the bottom edge of the horizontal section of the top of the first fixing portion is R1, and the value range of R1 is 25 to 30 mm; The curvature radius of the bottom edge of the horizontal section of the first fixing portion between the first oblique locking screw hole and the lower locking screw hole is R2, and the value range of R2 is 60 to 65 mm.
2. The proximal lateral tibial special-shaped block according to claim 1, characterized in that: The first vertical inclination angle, the second vertical inclination angle, and the third vertical inclination angle are equal.
3. The proximal lateral tibial special-shaped block according to claim 1, characterized in that: The first horizontal inclination angle and the fourth horizontal inclination angle are equal.
4. The proximal lateral tibial special-shaped block according to claim 1, characterized in that: The first fixing portion further includes a positioning hole; The positioning hole is located at the top end of the first fixing portion close to the edge and is used for temporarily fixing the special-shaped block or threading sutures or cables during surgery.
5. The proximal lateral tibial special-shaped block according to claim 1, characterized in that: The first hole diameter of the front connecting screw hole and the second hole diameter of the rear connecting screw hole are equal or different.