A special-shaped distal tibial block

Abstract

An embodiment of the present invention relates to a tibial distal shaped block, which is a plate-like structure and specifically includes: a first fixing part and a second fixing part, wherein the first fixing part and the second fixing part are connected: the inner surface of the first fixing part is an L-shaped arc surface; the top of the first fixing part has a first top locking screw hole, a second top locking screw hole, a third top locking screw hole and a fourth top locking screw hole in sequence from the inside to the outside; a first oblique locking screw hole, which is located in the middle of the first fixing part; a second oblique locking screw hole, which is located at the lower part of the first oblique locking screw hole; a lower locking screw hole, which is located at the lower part of the first fixing part; the second fixing part includes: a fixing screw hole, which is located on the surface of the second fixing part; a front connecting screw hole, which is located at the front side of the side of the second fixing part; and a rear connecting screw hole, which is located at the rear side of the side of the second fixing part.

Description

Technical Field

[0001] The invention relates to the field of orthopedic medical instruments, and in particular to a distal tibia special-shaped block. Background Art

[0002] Tibial fracture is a common type of fracture, which is particularly prone to occur in young people and elderly people with osteoporosis. In addition to bone fragmentation, fracture may be accompanied by dislocation of bone fragments. The distal part of the tibia usually has less flesh and thin skin, which makes treatment difficult.

[0003] In traditional fracture treatment surgery, the incidence of complications is high. Existing distal tibia fractures are fixed with an external fixator and set at the fracture site of the distal tibia. The external fixator is combined with the tibia with bone screws. The external fixator is usually large in size and only suitable for specific fracture situations. The tibia after the external fixator heals has poor bone regeneration. The patient's hospital stay is long and the recovery speed is relatively slow. Summary of the invention

[0004] The purpose of the present invention is to provide a distal tibial special-shaped block with an integrated design, multi-point fixation in different directions, easy operation, and an overall stable frame structure formed with installation components or related products. The fixation is more firm, the adhesion performance is better, and the wrapping range is wide.

[0005] To achieve the above object, the present invention provides a distal tibia special-shaped block, which is a plate-like structure and specifically includes: a first fixing portion 81 and a second fixing portion 82, wherein the first fixing portion 81 and the second fixing portion 82 are connected:

[0006] The inner surface of the first fixing portion 81 is an L-shaped arc surface, which matches the curved surface of the upper end of the outer side of the tibia and is used to be fixed to the outer side of the tibia;

[0007] The top of the first fixing portion 81 has a first top locking screw hole 810, a second top locking screw hole 811, a third top locking screw hole 812 and a fourth top locking screw hole 813 in sequence from the inside to the outside;

[0008] After the first locking screw passes through the first top locking screw hole 810, the first upper screw connection portion of the first locking screw is screwed with the first top locking screw hole 810, and the vertical inclination angle of the normal to the plane where the first locking screw and the second fixing portion 82 are located is the first vertical inclination angle; the horizontal inclination angle of the normal to the plane where the first locking screw and the second fixing portion 82 are located is the first horizontal inclination angle;

[0009] After the second locking screw passes through the second top locking screw hole 811, the second upper screw connection portion of the second locking screw is screwed with the second top locking screw hole 811, and the vertical inclination angle of the normal to the plane where the second locking screw and the second fixing portion 82 are located is the second vertical inclination angle; the horizontal inclination angle of the normal to the plane where the second locking screw and the second fixing portion 82 are located is the second horizontal inclination angle;

[0010] After the third locking screw passes through the third top locking screw hole 812, the third upper screw connection portion of the third locking screw is screwed with the third top locking screw hole 812, and the vertical inclination angle of the normal to the plane where the third locking screw and the second fixing portion 82 are located is a third vertical inclination angle; the horizontal inclination angle of the normal to the plane where the third locking screw and the second fixing portion 82 are located is a third horizontal inclination angle;

[0011] After the fourth locking screw passes through the fourth top locking screw hole 813, the fourth upper screwing portion of the fourth locking screw is screwed with the fourth top locking screw hole 813, and the vertical inclination angle of the fourth locking screw and the normal of the plane where the second fixing portion 82 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 82 is located is a third horizontal inclination angle;

[0012] The first oblique locking screw hole 814 is located in the middle of the first fixing portion 81. When the fifth locking screw passes through the first oblique locking screw hole 814, the fifth upper screwing portion of the fifth locking screw is screwed with the first oblique locking screw hole 814. The vertical inclination angle of the fifth locking screw and the normal to the plane where the second fixing portion 82 is located is a fifth vertical inclination angle; the horizontal inclination angle of the fifth locking screw and the normal to the plane where the second fixing portion 82 is located is a fifth horizontal inclination angle, and the fifth horizontal inclination angle intersects with the first horizontal inclination angle, the second horizontal inclination angle, the third horizontal inclination angle and the fourth horizontal inclination angle respectively.

[0013] The second oblique locking screw hole 815 is located at the lower part of the first oblique locking screw hole 814. When the sixth locking screw passes through the second oblique locking screw hole 815, the sixth upper screwing portion of the sixth locking screw is screwed with the second oblique locking screw hole 815. The vertical inclination angle of the sixth locking screw and the normal of the plane where the second fixing portion 82 is located is a sixth vertical inclination angle; the horizontal inclination angle of the sixth locking screw and the normal of the plane where the second fixing portion 82 is located is a sixth horizontal inclination angle, and the sixth horizontal inclination angle intersects with the first horizontal inclination angle, the second horizontal inclination angle, the third horizontal inclination angle and the fourth horizontal inclination angle respectively.

[0014] A lower locking screw hole 816, located at the lower part of the first fixing part 81;

[0015] The second fixing portion 82 includes:

[0016] A fixing screw hole 820 is located on the surface of the second fixing portion 82;

[0017] The front connecting screw hole 821 is located at the front side of the side of the second fixing portion 82, and the aperture of the front connecting screw hole 821 is the first aperture;

[0018] The rear connecting screw hole 822 is located at the rear side of the side of the second fixing portion 82, and the aperture of the rear connecting screw hole 822 is a second aperture; the second aperture is smaller than the first aperture;

[0019] The first connecting rod is inserted into the front connecting screw hole 821, and the second connecting rod is inserted into the rear connecting screw hole 822. When the ninth locking screw passes through the fixing screw hole 820, the ninth upper threaded portion of the seventh locking screw is threadedly connected to the fixing screw hole 820, thereby squeezing the front connecting screw hole 821 and the rear connecting screw hole 822, and fixing the first connecting rod and the second connecting rod to the second fixing portion 82.

[0020] Preferably, the distal tibia special-shaped block further includes a positioning hole 817;

[0021] The positioning holes 817 include a first positioning hole 8170, a second positioning hole 8171, a third positioning hole 8172 and a fourth positioning hole 8173; wherein the first positioning hole 8170, the second positioning hole 8171 and the third positioning hole 8172 are respectively located at the top of the top locking screw hole, and the fourth positioning hole 8173 is located between the top locking screw hole and the first oblique locking screw hole 814, and the positioning holes 817 are used for temporary fixation of the distal tibial special-shaped block during surgery or for threading sutures or cables.

[0022] Preferably, the sixth vertical inclination angle is greater than the first vertical inclination angle, the second vertical inclination angle, the third vertical inclination angle, the fourth vertical inclination angle and the fifth vertical inclination angle.

[0023] Preferably, the first vertical inclination angle, the second vertical inclination angle, the third vertical inclination angle, the fourth vertical inclination angle and the fifth vertical inclination angle are 7°, and the sixth vertical inclination angle is 13°.

[0024] Preferably, the fifth horizontal inclination angle is greater than the first horizontal inclination angle, the second horizontal inclination angle, the third horizontal inclination angle, the fourth horizontal inclination angle and the sixth horizontal inclination angle; the first horizontal inclination angle, the second horizontal inclination angle, the third horizontal inclination angle and the fourth horizontal inclination angle are the same.

[0025] Preferably, the first horizontal inclination angle, the second horizontal inclination angle, the third horizontal inclination angle and the fourth horizontal inclination angle are 25.7°, the fifth horizontal inclination angle is 107.3°, and the sixth horizontal inclination angle is 94.3°.

[0026] Preferably, the curvature radius of the bottom edge of the horizontal section of the first fixing portion 81 between the third positioning hole 8172 and the fourth positioning hole 8173 is R1, and the value range of R1 is 28-32 mm.

[0027] Preferably, the first aperture of the front connecting screw hole and the second aperture of the rear connecting screw hole are equal or different.

[0028] The embodiment of the present invention provides a special-shaped distal tibial block, which has an integrally formed design and a certain curvature to ensure adhesion, and screw holes in different orientations are fixed to achieve a cross-locking spatial structure, thereby improving the firmness of the connection, providing a wider coverage area, and reducing the patient's discomfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A top view of a distal tibia shaped block provided by an embodiment of the present invention;

[0030] Figure 2 A bottom view of the tibial distal end special-shaped block provided by an embodiment of the present invention;

[0031] Figure 3 A side view of the distal end of the tibial distal shaped block provided by an embodiment of the present invention;

[0032] Figure 4 for Figure 1 Sectional view of the AA section;

[0033] Figure 5 for Figure 1 Cross-section of the BB section. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments.

[0035] An embodiment of the present invention provides a distal tibial special-shaped block, which is used for fixing the fracture site in tibial fracture surgery.

[0036] Figure 1 A top view of a tibial distal shaped block provided by an embodiment of the present invention, Figure 2 A bottom view of the tibial distal end shaped block provided by an embodiment of the present invention, Figure 3The end side view of the distal tibial shaped block provided in an embodiment of the present invention; as shown in the figure, the distal tibial shaped block in the embodiment of the present invention is a plate-like structure, and the distal tibial shaped block specifically includes: a first fixing portion 81 and a second fixing portion 82.

[0037] The first fixing portion 81 is an L-shaped structure, and the first fixing portion 81 and the second fixing portion 82 are connected and formed as one piece.

[0038] Preferably, in this embodiment, the plane where the second fixing portion 82 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; in the L-shaped structure of the first fixing portion 81, the end side close to the short side is defined as the inner side of the distal tibial shaped block, and the side extending from the short side to the long side, close to the long side is defined as the outer side of the distal tibial shaped block.

[0039] The outer surface of the first fixing part 81 is an arcuate surface with a certain curvature, and a plurality of screw holes and circular holes are sequentially arranged on the arcuate surface extending from the inside to the outside. The inner surface of the first fixing part 81 is an L-shaped arcuate surface, which is adapted to 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; specifically, the top of the first fixing part 81 is sequentially provided with a first top locking screw hole 810, a second top locking screw hole 811, a third top locking screw hole 812 and a fourth top locking screw hole 813 from the inside to the outside.

[0040] The first top locking screw hole 810 is located at the top of the first fixing portion 81 near the end of the short side of the L-shape. The interior of the first top locking screw hole 810 is specifically composed of an upper edge portion and a lower edge portion. The surface of the upper edge portion is a smooth curved surface, and the surface of the lower edge portion is provided with a fastening thread. The first top locking screw hole 810 is used to fit the inner surface of the first fixing portion 81 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] Figure 2 A bottom view of the tibial distal end shaped block provided by an embodiment of the present invention, Figure 3 The end side view of the tibial distal shaped block provided by the embodiment of the present invention; Figure 2 and Figure 3As shown, in a specific embodiment, after the first locking screw passes through the first top locking screw hole 810, the first upper threaded portion of the first locking screw is screwed into the lower edge of the first top locking screw hole 810, and 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 first top locking screw hole 810, and the screw shaft portion and the nail head portion of the first locking screw are respectively passed through the first top locking screw hole 810 and implanted into the bone. During the implantation process, the inclination angle formed by the first locking screw and the third plane is a first vertical inclination angle α, and the first vertical inclination angle α is 7°; the inclination angle formed by the first locking screw and the second plane is a first horizontal inclination angle α′, and the first horizontal inclination angle α′ is 25.7°.

[0042] The second top locking screw hole 811 is located above the first top locking screw hole 810 and between the first top locking screw hole 810 and the third top locking screw hole 812. Similarly, the interior of the second top locking screw hole 811 has an upper edge and a lower edge like the interior of the first top locking screw hole 810. The function of the second top locking screw hole 811 is the same as that of the first top locking screw hole 810, that is, the first fixing portion 81 is attached and fixed to the bone surface of the upper end of the lateral side of the tibia by a locking screw;

[0043] In a specific embodiment, after the second locking screw passes through the second top locking screw hole 811, the second upper threaded portion of the second locking screw is screwed into the lower edge of the second top locking screw hole 811. 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 second top locking screw hole 811. The screw shaft portion and the nail head portion of the second locking screw are respectively passed through the second top locking screw hole 811 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, and the second vertical inclination angle β is equal to the first vertical inclination angle α; 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′ is equal to the first horizontal inclination angle α′.

[0044] The third top locking screw hole 812 is between the second top locking screw hole 811 and the fourth top locking screw hole 813. Similarly, the interior of the third top locking screw hole 812 has an upper edge and a lower edge like the interior of the first top locking screw hole 810. The function of the third top locking screw hole 812 is the same as that of the first top locking screw hole 810, that is, the first fixing portion 81 is attached and fixed to the bone surface of the upper end of the lateral side of the tibia by a locking screw.

[0045] In a specific embodiment, after the third locking screw passes through the third top locking screw hole 812, the third upper threaded portion of the third locking screw is screwed into the lower edge of the third top locking screw hole 812. 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 third top locking screw hole 812. The screw shaft portion and the nail head portion of the third locking screw are respectively passed through the third top locking screw hole 812 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, and the third vertical inclination angle γ is equal to the first vertical inclination angle α; 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 equal to the first horizontal inclination angle α′.

[0046] The fourth top locking screw hole 813 is located above the third top locking screw hole 812. Similarly, the interior of the fourth top locking screw hole 813 has an upper edge and a lower edge like the interior of the first top locking screw hole 810. The function of the fourth top locking screw hole 813 is the same as that of the first top locking screw hole 810, that is, the first fixing portion 81 is attached and fixed to the bone surface of the upper end of the outer side of the tibia by a locking screw.

[0047] In a specific embodiment, after the fourth locking screw passes through the fourth top locking screw hole 813, the fourth upper threaded portion of the fourth locking screw is screwed into the lower edge of the fourth top locking screw hole 813. 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 fourth top locking screw hole 813. The screw shaft portion and the nail head portion of the fourth locking screw are respectively passed through the fourth top locking screw hole 813 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 is equal to the first vertical inclination angle α; the inclination angle formed by the fourth locking screw and the second plane is the fourth horizontal inclination angle δ′, and the fourth horizontal inclination angle δ′ is equal to the first horizontal inclination angle α′.

[0048] Combination Figure 2 As shown, the first vertical inclination angle α, the second vertical inclination angle β, the third vertical inclination angle γ and the fourth vertical inclination angle δ are the same; combined Figure 3 As shown, 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′ are the same.

[0049] The first oblique locking screw hole 814 is located in the middle of the L-shaped long side of the first fixing portion 81. Similarly, the interior of the first oblique locking screw hole 814 has an upper edge and a lower edge like the interior of the first top locking screw hole 810. The function of the first oblique locking screw hole 814 is the same as that of the first top locking screw hole 810, which is to fit and fix the first fixing portion 81 to the bone surface of the outer side of the tibia through a locking screw.

[0050] In a specific embodiment, after the fifth locking screw passes through the first oblique locking screw hole 814, the fifth upper threaded portion of the fifth locking screw is screwed into the lower edge of the first oblique locking screw hole 814. 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 first oblique locking screw hole 814, and the screw shaft and the nail head of the fifth locking screw are respectively passed through the first oblique locking screw hole 814 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 equal to the first vertical inclination angle α; 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 107.3°. The fifth horizontal inclination angle ε′ intersects with 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′, respectively.

[0051] The second oblique locking screw hole 815 is arranged at a certain distance from the first oblique locking screw hole 814 along the long side direction of the L shape, and is located at the lower part of the first oblique locking screw hole 814. Similarly, the interior of the second oblique locking screw hole 815 has an upper edge and a lower edge like the interior of the first top locking screw hole 810. The function of the second oblique locking screw hole 815 is the same as that of the first top locking screw hole 810, that is, the first fixing portion 81 is attached and fixed to the bone surface of the outer side of the tibia by a locking screw;

[0052] In a specific embodiment, after the sixth locking screw passes through the second oblique locking screw hole 815, the sixth upper threaded portion of the sixth locking screw is screwed into the lower edge of the second oblique locking screw hole 815. As the sixth upper threaded portion is screwed and tightened with the fastening thread, the screw cap portion of the sixth locking screw stays in the upper edge of the second oblique locking screw hole 815, and the screw shaft and the nail head of the sixth locking screw are respectively passed through the second oblique locking screw hole 815 and implanted into the bone. During the implantation process, the inclination angle formed by the sixth locking screw and the third plane is the sixth vertical inclination angle ζ, and the sixth vertical inclination angle ζ is 13°; the inclination angle formed by the sixth locking screw and the second plane is the sixth horizontal inclination angle ζ′, and the sixth horizontal inclination angle ζ′ is 94.3°. The sixth horizontal inclination angle ζ′ intersects with 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′, respectively.

[0053] like Figure 2 As shown, the sixth vertical inclination angle ζ is greater than the first vertical inclination angle α, the second vertical inclination angle β, the third vertical inclination angle γ, the fourth vertical inclination angle δ 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′, the fourth horizontal inclination angle δ′ and the sixth horizontal inclination angle ζ′.

[0054] The lower locking screw hole 816 is located at the lower part of the L-shaped long side of the first fixing portion 81. Similarly, the interior of the lower locking screw hole 816 has an upper edge and a lower edge like the interior of the first top locking screw hole 810. The function of the lower locking screw hole 816 is the same as that of the first top locking screw hole 810, that is, the first fixing portion 81 is adhered and fixed to the bone surface of the outer side of the tibia through a locking screw.

[0055] The lower locking screw hole 816 is used in conjunction with the locking screw in the same manner as the first top locking screw hole 810 is used in conjunction with the first locking screw, and will not be repeated here.

[0056] The positioning hole 817 is composed of a circular hole and is located on one side of the short side of the L-shape at the top of the first fixing part 81, and specifically includes a first positioning hole 8170, a second positioning hole 8171, a third positioning hole 8172 and a fourth positioning hole 8173; wherein the first positioning hole 8170, the second positioning hole 8171 and the third positioning hole 8172 are respectively located at the top of the first top locking screw hole 810, the second top locking screw hole 811, the third top locking screw hole 812 and the fourth top locking screw hole 813, the fourth positioning hole 8173 is located between the fourth top locking screw hole 813 and the first oblique locking screw hole 814, the aperture of the positioning hole 817 is smaller than the aperture of the locking screw hole, and the positioning hole 817 is used for temporary fixation of the distal tibial special-shaped block during surgery or for threading sutures or cables. Figure 5 for Figure 1 As shown in the cross-sectional view of the middle BB part, the curvature radius of the arc-shaped surface of the inner surface of the first fixing portion 81 extending from the top to the middle gradually changes. Specifically, the curvature radius of the bottom edge of the horizontal section between the top third positioning hole 8172 and the fourth positioning hole 8173 is R1, and the value range is 35 to 40 mm.

[0057] Figure 4 for Figure 1 The cross-section of the AA section, combined with Figure 1 and Figure 4As shown, the outer surface of the second fixing portion 82 is set to an arcuate surface with a certain curvature, and two fixing screw holes 820 are set in the arcuate surface, and are set at a certain distance along the long axis direction of the second fixing portion 82. The interior of the fixing screw hole 820 is specifically composed of an upper edge 8201 and a lower edge 8202. The surface of the upper edge 8201 is a smooth curved surface that matches the upper screw connection portion of the locking screw, and the surface of the lower edge 8202 is provided with a fastening thread. The aperture of the fixing screw hole 820 is the same as the aperture of the locking screw hole; the inner surface of the second fixing portion 82 that fits the tibial shaft is also set to an arcuate curved surface with a certain curvature. According to different patients and different fracture sites, the curvature of the inner surface of the second fixing portion 82 can be adapted so that the distal tibial shaped block fits the tibial surface better; the side surfaces of the second fixing portion 82 are respectively provided with a front connecting screw hole 821 and a rear connecting screw hole 822, the front connecting screw hole 821 and the rear connecting screw hole 822 are arranged parallel to the long axis direction of the second fixing portion 82, and are respectively arranged on both sides of the fixing screw hole 820, the front connecting screw hole 821 and the rear connecting screw hole 822 are used to firmly connect the connecting rod and the distal tibial shaped block together through locking screws.

[0058] The front connecting screw hole 821 is located at the front side of the second fixing portion 82, and the aperture of the front connecting screw hole 821 is the first aperture D1;

[0059] The rear connecting screw hole 822 is located at the rear side of the side of the second fixing portion 82, and the aperture of the rear connecting screw hole 822 is the second aperture D2;

[0060] The first aperture D1 and the second aperture D2 are equal or different, and the different apertures of the front connecting screw hole 821 and the rear connecting screw hole 822 are specially designed to better fit the bone shape and characteristics of Asians.

[0061] The second fixing part 82 firmly fixes the connecting rod inside the second fixing part 82 through a locking screw; a cross hole 823 is provided at the intersection of the front connecting screw hole 821, the rear connecting screw hole 822 and the fixing screw hole 820, and the cross hole 823 is mainly used to squeeze the connecting rod through the locking screw, so as to fix the connecting rod inside the second fixing part 82.

[0062] In a specific embodiment, the first connecting rod 20 is inserted into the front connecting screw hole 821, and the second connecting rod 21 is inserted into the rear connecting screw hole 822. After the two seventh locking screws are respectively passed through the two fixing screw holes 820, the seventh upper threaded portion of the seventh locking screw is screwed into the lower edge 8202 of the fixing screw hole 820. As the seventh upper threaded portion is screwed and tightened with the fastening thread, the screw cap portion of the seventh locking screw stays in the upper edge 8201 of the fixing screw hole 820, respectively squeezing the front connecting screw hole 821 and the rear connecting screw hole 822, while fixing the first connecting rod 20 and the second connecting rod 21 to the second fixing portion 82 through the cross hole 823. The screw portion and the nail head portion of the seventh locking screw are respectively passed through the fixing screw hole 820 and implanted into the bone.

[0063] The above is an introduction to the various components of the distal tibial shaped block provided in the embodiment of the present invention and the connection relationship between them. Figure 1 , Figure 2 and Figure 4 , the use of the distal tibial shaped block is described in detail;

[0064] When doctors use the distal tibial shaped block to fix the fracture site during tibial fracture surgery, they need to use the locking screw and the connecting rod together. The following is a detailed description of the process of using the combination.

[0065] During a specific tibial fracture surgery, the doctor aligns and fits the first fixing portion 81 of the distal tibial shaped block with the bone surface of the upper outer end of the tibia, and respectively inserts the locking screws into the first top locking screw hole 810, the second top locking screw hole 811, the third top locking screw hole 812 and the fourth top locking screw hole 813. 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 shaft portion and the nail head portion of the locking screw are respectively inserted into the locking screw holes and implanted into the bone. Finally, the first fixing portion 81 of the distal tibial shaped block is fixed to the bone surface of the upper outer end of the tibia, and the first connecting rod 20 and the second connecting rod are respectively inserted. The connecting rod 21 is inserted into the front connecting screw hole 821 and the rear connecting screw hole 822 in sequence, and the locking screws are respectively passed through the two fixing screw holes 820. After the locking screws pass through the fixing screw holes 820, the upper threaded portion of the locking screw is screwed with the lower edge 8202 of the fixing screw hole 820. 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 8201 of the fixing screw hole 820, and the front connecting screw hole 821 and the rear connecting screw hole 822 are squeezed respectively, while the first connecting rod 20 and the second connecting rod 21 are fixed to the second fixing portion 82 through the cross hole 823. The screw portion and the nail head of the locking screw are respectively passed through the fixing screw holes 820 and implanted into the bone. At this point, the distal tibial special-shaped block is completely fixed to the distal tibia.

[0066] The embodiment of the present invention provides a special-shaped distal tibial block, which has an integrally formed design and a certain curvature to ensure adhesion, and screw holes in different orientations are fixed to achieve a cross-locking spatial structure, thereby improving the firmness of the connection, providing a wider coverage area, and reducing the patient's discomfort.

[0067] 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 special-shaped distal tibial block, characterized in that: The distal tibia special-shaped block is a plate-like structure, and the distal tibia special-shaped block specifically includes: a first fixing part and a second fixing part, wherein the first fixing part and the second fixing part are connected: The inner surface of the first fixing portion is an L-shaped arc surface, which matches the curved surface of the upper end of the outer side of the tibia and is used for fixing to the outer side of the tibia; The top of the first fixing portion has a first top locking screw hole, a second top locking screw hole, a third top locking screw hole and a fourth top locking screw hole in sequence from the inside to the outside; the interior of the first top locking screw hole is specifically composed of an upper edge portion and a lower edge portion, the surface of the upper edge portion is a smooth curved surface, and the surface of the lower edge portion is provided with a fastening thread; After the first locking screw passes through the first top locking screw hole, the first upper screw connection portion of the first locking screw is screwed with the first top locking screw hole, and 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; After the second locking screw passes through the second top locking screw hole, the second upper screw connection portion of the second locking screw is screwed with the second top locking screw hole, and the vertical inclination angle of the normal to the plane where the second locking screw and the second fixing portion are located is the second vertical inclination angle; the horizontal inclination angle of the normal to the plane where the second locking screw and the second fixing portion are located is the second horizontal inclination angle; After the third locking screw passes through the third top locking screw hole, the third upper screw connection portion of the third locking screw is screwed with the third top locking screw hole, and 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; After the fourth locking screw passes through the fourth top locking screw hole, the fourth upper screw connection portion of the fourth locking screw is screwed with the fourth top locking screw hole, and the vertical inclination angle between the fourth locking screw and the normal to the plane where the second fixing portion is located is a fourth vertical inclination angle; the horizontal inclination angle between the fourth locking screw and the normal to the plane where the second fixing portion is located is a fourth horizontal inclination angle; a first oblique locking screw hole, located in the middle of the first fixing portion; when the fifth locking screw passes through the first oblique locking screw hole, the fifth upper screw-connecting portion of the fifth locking screw is screwed with the first oblique locking screw hole; a vertical inclination angle between the fifth locking screw and the normal to the plane where the second fixing portion 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 portion is located is a fifth horizontal inclination angle, and the fifth horizontal inclination angle intersects the first horizontal inclination angle, the second horizontal inclination angle, the third horizontal inclination angle and the fourth horizontal inclination angle respectively; a second oblique locking screw hole, located at a lower part of the first oblique locking screw hole; when the sixth locking screw passes through the second oblique locking screw hole, the sixth upper screwing portion of the sixth locking screw is screwed with the second oblique locking screw hole; a vertical inclination angle between the sixth locking screw and the normal to the plane where the second fixing portion is located is a sixth vertical inclination angle; a horizontal inclination angle between the sixth locking screw and the normal to the plane where the second fixing portion is located is a sixth horizontal inclination angle, and the sixth horizontal inclination angle intersects the first horizontal inclination angle, the second horizontal inclination angle, the third horizontal inclination angle and the fourth horizontal inclination angle respectively; A lower locking screw hole, located at the lower part of the first fixing part; The second fixing portion includes: A fixing 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 ninth locking screw passes through the fixing screw hole, the seventh upper threaded portion of the seventh locking screw is threadedly connected to the fixing 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.

2. The distal tibial special-shaped block according to claim 1, characterized in that: The distal tibia special-shaped block also includes a positioning hole; The positioning holes include a first positioning hole, a second positioning hole, a third positioning hole and a fourth positioning hole; wherein the first positioning hole, the second positioning hole and the third positioning hole are respectively located at the top of the top locking screw hole, and the fourth positioning hole is located between the top locking screw hole and the first oblique locking screw hole, and the positioning holes are used for temporary fixation of the distal tibial special-shaped block during surgery or for threading sutures or cables.

3. The distal tibial special-shaped block according to claim 1, characterized in that: The sixth vertical inclination angle is greater than the first vertical inclination angle, the second vertical inclination angle, the third vertical inclination angle, the fourth vertical inclination angle, and the fifth vertical inclination angle.

4. The distal tibial special-shaped block according to claim 1, characterized in that: The first vertical inclination angle, the second vertical inclination angle, the third vertical inclination angle, the fourth vertical inclination angle and the fifth vertical inclination angle are 7°, and the sixth vertical inclination angle is 13°.

5. The distal tibial special-shaped block according to claim 1, characterized in that: The fifth horizontal inclination angle is greater than the first horizontal inclination angle, the second horizontal inclination angle, the third horizontal inclination angle, the fourth horizontal inclination angle and the sixth horizontal inclination angle; the first horizontal inclination angle, the second horizontal inclination angle, the third horizontal inclination angle and the fourth horizontal inclination angle are the same.

6. The distal tibial special-shaped block according to claim 1, characterized in that: The first horizontal inclination angle, the second horizontal inclination angle, the third horizontal inclination angle and the fourth horizontal inclination angle are 25.7°, the fifth horizontal inclination angle is 107.3°, and the sixth horizontal inclination angle is 94.3°.

7. The distal tibial special-shaped block according to claim 2, characterized in that: The curvature radius of the bottom edge of the horizontal section of the first fixing portion between the third positioning hole and the fourth positioning hole is R1, and the value range of R1 is 28-32 mm.

8. The distal 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.

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