A special-shaped block for the proximal lateral side of the tibia

Abstract

The embodiment of the present invention relates to a proximal lateral tibial special-shaped block, which specifically includes: a first fixing part and a second fixing part, which are connected to each other: the inner surface of the first fixing part is an 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; the middle of the first fixing part has a first middle locking screw hole, a second middle locking screw hole and a third middle locking screw hole in sequence from the inside to the outside; the first oblique locking screw hole 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 proximal lateral tibial special-shaped block. Background Art

[0002] The treatment and rehabilitation methods for fractures usually need to be based on the bone structure of the injured area and appropriate treatment should be given. When the fracture is close to the joint, plaster fixation is not suitable. Bone fixation plates and bone screws are usually used as instruments to fix the fracture.

[0003] The existing method of fixing tibia fractures is to first indirectly reposition the bone and then use a bone fixation plate for indirect fixation. However, this method has poor repositioning or fixation effects and the operation takes a long time. After recovery from the operation, the fracture site is prone to displacement due to insufficient fixation force. In addition, the traditional bone fixation plate needs to be completely attached to the bone and relies on the friction between the bone plate and the bone to achieve the fixation effect. However, this fixation method will cause poor blood transportation at the fracture site due to periosteum locking, and will also cause slow healing of the fracture site or other complications after surgery. Therefore, the postoperative recovery effect will also be poor. Summary of the invention

[0004] The purpose of the present invention is to provide a proximal lateral tibia special-shaped block, which has a multi-point interlocking structure that is more firmly fixed and no longer relies on friction with the bone. It has a better adhesion effect, a larger wrapping range, provides reliable support, and can also reduce the patient's 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 portion is an arcuate 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;

[0007] 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;

[0008] 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;

[0009] 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;

[0010] 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;

[0011] 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;

[0012] The first horizontal inclination angle, the second horizontal inclination angle, the third horizontal inclination angle and the fourth horizontal inclination angle decrease in sequence;

[0013] The middle part of the first fixing part has a first middle locking screw hole, a second middle locking screw hole and a third middle locking screw hole in sequence from the inside to the outside;

[0014] After the fifth locking screw passes through the first middle locking screw hole, the fifth upper screw-connecting portion of the fifth locking screw is screwed with the first middle locking screw hole, and the vertical inclination angle of the fifth locking screw and the normal of the plane where the second fixing portion is located is a fifth vertical inclination angle; the horizontal inclination angle of the fifth locking screw and the normal of the plane where the second fixing portion is located is a fifth horizontal inclination angle;

[0015] After the sixth locking screw passes through the second middle locking screw hole, the sixth upper screw connection portion of the sixth locking screw is screwed with the second middle locking screw hole, and the 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; the 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;

[0016] After the seventh locking screw passes through the third middle locking screw hole, the seventh upper screw connection portion of the seventh locking screw is screwed with the third middle locking screw hole, and the vertical inclination angle between the seventh locking screw and the normal to the plane where the second fixing portion is located is a seventh vertical inclination angle; the horizontal inclination angle between the seventh locking screw and the normal to the plane where the second fixing portion is located is a seventh horizontal inclination angle;

[0017] The fifth horizontal inclination angle, the sixth horizontal inclination angle and the seventh horizontal inclination angle decrease in sequence;

[0018] a first oblique locking screw hole, located at the lower part of the first fixing portion; when the eighth locking screw passes through the first oblique locking screw hole, the eighth upper screw connection portion of the eighth locking screw is screwed with the first oblique locking screw hole; a horizontal inclination angle between the eighth locking screw and the normal to the plane where the second fixing portion is located is an eighth horizontal inclination angle; a vertical inclination angle between the eighth locking screw and the normal to the plane where the second fixing portion is located is an eighth vertical inclination angle; the eighth vertical inclination angle intersects with the fifth vertical inclination angle, the sixth vertical inclination angle and the seventh vertical inclination angle respectively;

[0019] The second fixing portion includes:

[0020] A fixing screw hole, located on the surface of the second fixing portion;

[0021] 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;

[0022] 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;

[0023] 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 ninth upper threaded portion of the ninth 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.

[0024] Preferably, the eighth 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, the fifth vertical inclination angle, the sixth vertical inclination angle and the seventh vertical inclination angle.

[0025] Preferably, the first vertical inclination angle, the second vertical inclination angle, the third vertical inclination angle and the fourth vertical inclination angle range from 6 to 10°, the fifth vertical inclination angle, the sixth vertical inclination angle and the seventh vertical inclination angle range from 4 to 8°, and the eighth vertical inclination angle ranges from 11 to 15°.

[0026] Preferably, the first vertical inclination angle, the second vertical inclination angle, the third vertical inclination angle and the fourth vertical inclination angle are the same; the fifth vertical inclination angle, the sixth vertical inclination angle and the seventh vertical inclination angle are the same.

[0027] Preferably, the first vertical inclination angle, the second vertical inclination angle, the third vertical inclination angle, the fourth vertical inclination angle, the fifth vertical inclination angle, the sixth vertical inclination angle and the seventh vertical inclination angle decrease in sequence.

[0028] Preferably, the eighth 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, the fifth horizontal inclination angle, the sixth horizontal inclination angle and the seventh horizontal inclination angle.

[0029] Preferably, the first horizontal inclination angle range is 14 to 18°, the second horizontal inclination angle range is 10 to 14°, the third horizontal inclination angle range is 6 to 10°, the fourth horizontal inclination angle range is 3 to 7°, the fifth horizontal inclination angle range is 12 to 16°, the sixth horizontal inclination angle range is 8 to 12°, the seventh horizontal inclination angle range is 4 to 8°, and the eighth horizontal inclination angle range is 20 to 24°.

[0030] Preferably, the curvature radius of the bottom edge of the horizontal section of the first fixing portion between the top locking screw hole and the middle locking screw hole is R1, and the value range of R1 is 30 to 35 mm;

[0031] The curvature radius of the bottom edge of the horizontal section of the first fixing portion between the middle locking screw hole and the first oblique locking screw hole is R2, and the value range of R2 is 58 to 63 mm.

[0032] Preferably, the first fixing portion also has one or more positioning holes for temporarily fixing the special-shaped block or threading sutures or cables during surgery.

[0033] Preferably, the first aperture of the front connecting screw hole and the second aperture of the rear connecting screw hole are equal or different.

[0034] A proximal lateral tibia special-shaped block provided by an embodiment of the present invention realizes a cross-locking spatial structure by arranging locking screw holes in different orientations, thereby improving the firmness of fixation with the tibia. It has an integrally formed design and a certain curvature to ensure adhesion, provide a wider wrapping range, and reduce the patient's discomfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A top view of the proximal lateral tibial special-shaped block provided by an embodiment of the present invention;

[0036] Figure 2A side view of the proximal lateral tibial shaped block provided by an embodiment of the present invention (I);

[0037] Figure 3 A side view of the proximal lateral tibial shaped block provided by an embodiment of the present invention (II);

[0038] Figure 4 for Figure 1 Sectional view of the AA section;

[0039] Figure 5 for Figure 1 Cross-section of the middle BB section;

[0040] Figure 6 for Figure 1 Cross-section of the CC section. DETAILED DESCRIPTION

[0041] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments.

[0042] 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.

[0043] Figure 1 A top view of the lateral shaped block of the proximal tibia provided by an embodiment of the present invention, Figure 2 A side view of the lateral shaped block of the proximal tibia provided by an embodiment of the present invention (I), Figure 3 Side view (II) of the proximal lateral tibial shaped block provided in an embodiment of the present invention; as 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 71 and a second fixing portion 72.

[0044] The first fixing portion 71 and the second fixing portion 72 are connected and formed as one piece.

[0045] Preferably, in this embodiment, the plane where the second fixing portion 72 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 71 parallel to the long side of the proximal lateral shaped block of the tibia is defined as the outer side of the proximal lateral shaped block of the tibia, extending from the long side to the short side, and the side at the end of the short side is defined as the inner side of the proximal lateral shaped block of the tibia.

[0046] The outer surface of the first fixing portion 71 is an arc-shaped surface with a certain curvature, and a plurality of screw holes and circular holes are sequentially arranged on the arc-shaped surface extending from the inside to the outside. The inner surface of the first fixing portion 71 is an arc-shaped surface, which is adapted to the curved surface of the upper end of the outer side of the proximal tibia and is used to be fixed on the outer side of the proximal tibia; specifically, the top of the first fixing portion 71 is sequentially provided with a first top locking screw hole 710, a second top locking screw hole 711, a third top locking screw hole 712 and a fourth top locking screw hole 713 from the inside to the outside.

[0047] The first top locking screw hole 710 is located at the end of the top of the first fixing portion 71 close to the short side. The first top locking screw hole 710 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 710 is used to fit the inner surface of the first fixing portion 71 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;

[0048] In a specific embodiment, after the first locking screw passes through the first top locking screw hole 710, the first upper threaded portion of the first locking screw is threadedly engaged with the lower edge of the first top locking screw hole 710. 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 710. The screw shaft and the nail head of the first locking screw are respectively passed through the first top locking screw hole 710 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 14 to 18°.

[0049] The second top locking screw hole 711 is located below the first top locking screw hole 710 and between the first top locking screw hole 710 and the third top locking screw hole 712. Similarly, the interior of the second top locking screw hole 711 has an upper edge and a lower edge like the interior of the first top locking screw hole 710. The function of the second top locking screw hole 711 is the same as that of the first top locking screw hole 710, that is, the first fixing portion 71 is attached and fixed to the bone surface of the upper end of the lateral side of the tibia by a locking screw.

[0050] In a specific embodiment, after the second locking screw passes through the second top locking screw hole 711, the second upper threaded portion of the second locking screw is screwed into the lower edge of the second top locking screw hole 711. 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 711. The screw shaft portion and the nail head portion of the second locking screw are respectively passed through the second top locking screw hole 711 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′ ranges from 10 to 14°.

[0051] The third top locking screw hole 712 is between the second top locking screw hole 711 and the fourth top locking screw hole 713. Similarly, the interior of the third top locking screw hole 712 has an upper edge and a lower edge like the interior of the first top locking screw hole 710. The function of the third top locking screw hole 712 is the same as that of the first top locking screw hole 710, that is, the first fixing portion 71 is attached and fixed to the bone surface of the upper end of the lateral side of the tibia by a locking screw.

[0052] In a specific embodiment, after the third locking screw passes through the third top locking screw hole 712, the third upper threaded portion of the third locking screw is screwed into the lower edge of the third top locking screw hole 712. 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 712. The screw shaft portion and the nail head portion of the third locking screw are respectively passed through the third top locking screw hole 712 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′ ranges from 6 to 10°.

[0053] The fourth top locking screw hole 713 is located below the third top locking screw hole 712. Similarly, the interior of the fourth top locking screw hole 713 has an upper edge and a lower edge like the interior of the first top locking screw hole 710. The function of the fourth top locking screw hole 713 is the same as that of the first top locking screw hole 710, that is, the first fixing portion 71 is attached and fixed to the bone surface of the upper end of the outer side of the tibia by a locking screw.

[0054] In a specific embodiment, after the fourth locking screw passes through the fourth top locking screw hole 713, the fourth upper threaded portion of the fourth locking screw is screwed into the lower edge of the fourth top locking screw hole 713. 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 713. The screw shaft portion and the nail head portion of the fourth locking screw respectively pass through the fourth top locking screw hole 713 and are 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′ ranges from 3 to 7°.

[0055] like 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; Figure 3 As shown, the degrees of 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′ decrease in sequence.

[0056] A first middle locking screw hole 714 , a second middle locking screw hole 715 and a third middle locking screw hole 716 are sequentially arranged in the middle of the first fixing portion 71 from the inside to the outside.

[0057] The first middle locking screw hole 714 is located below the first top locking screw hole 710 and close to the inner end of the proximal lateral shaped block of the tibia. Similarly, the interior of the first middle locking screw hole 714 has an upper edge and a lower edge like the interior of the first top locking screw hole 710. The function of the first middle locking screw hole 714 is the same as that of the first top locking screw hole 710, that is, the first fixing portion 71 is attached and fixed to the bone surface of the upper end of the lateral side of the tibia by a locking screw.

[0058] In a specific embodiment, after the fifth locking screw passes through the first middle locking screw hole 714, the fifth upper threaded portion of the fifth locking screw is screwed into the lower edge of the first middle locking screw hole 714. 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 middle locking screw hole 714, and the screw shaft and the nail head of the fifth locking screw respectively pass through the first middle locking screw hole 714 and are 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 4 to 8°; 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 12 to 16°.

[0059] The second middle locking screw hole 715 is located below the first middle locking screw hole 714 and between the first middle locking screw hole 714 and the third middle locking screw hole 716. Similarly, the interior of the second middle locking screw hole 715 has an upper edge and a lower edge like the interior of the first top locking screw hole 710. The function of the second middle locking screw hole 715 is the same as that of the first top locking screw hole 710, that is, the first fixing portion 71 is attached and fixed to the bone surface of the upper end of the lateral side of the tibia by a locking screw.

[0060] In a specific embodiment, after the sixth locking screw passes through the second middle locking screw hole 715, the sixth upper threaded portion of the sixth locking screw is screwed into the lower edge of the second middle locking screw hole 715. 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 middle locking screw hole 715. The screw shaft portion and the nail head portion of the sixth locking screw are respectively passed through the second middle locking screw hole 715 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 equal to the fifth vertical inclination angle ε; 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′ ranges from 8 to 12°.

[0061] The third middle locking screw hole 716 is located below the second middle locking screw hole 715. Similarly, the interior of the third middle locking screw hole 716 has an upper edge and a lower edge like the interior of the first top locking screw hole 710. The function of the third middle locking screw hole 716 is the same as that of the first top locking screw hole 710, that is, the first fixing portion 71 is attached and fixed to the bone surface of the upper end of the lateral side of the tibia by a locking screw.

[0062] In a specific embodiment, after the seventh locking screw passes through the third middle locking screw hole 716, the seventh upper threaded portion of the seventh locking screw is screwed into the lower edge of the third middle locking screw hole 716. 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 of the third middle locking screw hole 716, and the screw shaft portion and the nail head portion of the seventh locking screw are respectively passed through the third middle locking screw hole 716 and implanted into the bone. During the implantation process, the inclination angle formed by the seventh locking screw and the third plane is the seventh vertical inclination angle η, and the seventh vertical inclination angle η is equal to the fifth vertical inclination angle ε; the inclination angle formed by the seventh locking screw and the second plane is the seventh horizontal inclination angle η′, and the seventh horizontal inclination angle η′ ranges from 4 to 8°.

[0063] like Figure 2 As shown, the fifth vertical inclination angle ε, the sixth vertical inclination angle ζ and the seventh vertical inclination angle η are the same; Figure 3 As shown, the degrees of the fifth horizontal inclination angle ε′, the sixth horizontal inclination angle ζ′ and the seventh horizontal inclination angle η′ decrease successively.

[0064] The first oblique locking screw hole 717 is located at the lower part of the first fixing portion 71. Similarly, the interior of the first oblique locking screw hole 717 has an upper edge and a lower edge like the interior of the first top locking screw hole 710. The function of the first oblique locking screw hole 717 is the same as that of the first top locking screw hole 710, that is, the first fixing portion 71 is attached and fixed to the bone surface of the proximal tibia by a locking screw.

[0065] In a specific embodiment, after the eighth locking screw passes through the first oblique locking screw hole 717, the eighth upper threaded portion of the eighth locking screw is screwed into the lower edge of the first oblique locking screw hole 717. As the eighth upper threaded portion is screwed and tightened with the fastening thread, the screw cap portion of the eighth locking screw stays in the upper edge of the first oblique locking screw hole 717, and the screw shaft and the nail head of the eighth locking screw are respectively passed through the first oblique locking screw hole 717 and implanted into the bone. During the implantation process, the inclination angle formed by the eighth locking screw and the third plane is the eighth vertical inclination angle θ, and the eighth vertical inclination angle θ ranges from 11 to 15°; the eighth vertical inclination angle θ intersects with the fifth vertical inclination angle ε, the sixth vertical inclination angle ζ and the seventh vertical inclination angle η respectively; the inclination angle formed by the eighth locking screw and the second plane is the eighth horizontal inclination angle θ′, and the eighth horizontal inclination angle θ′ ranges from 20 to 24°.

[0066] like Figure 2 As shown, the eighth vertical inclination angle θ 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, the fifth vertical inclination angle ε, the sixth vertical inclination angle ζ and the seventh vertical inclination angle η.

[0067] Similarly, the degrees of the first vertical inclination angle α, the second vertical inclination angle β, the third vertical inclination angle γ, the fourth vertical inclination angle δ, the fifth vertical inclination angle ε, the sixth vertical inclination angle ζ and the seventh vertical inclination angle η decrease in sequence.

[0068] like Figure 3 As shown, the eighth horizontal inclination angle θ′ 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′, the fifth horizontal inclination angle ε′, the sixth horizontal inclination angle ζ′ and the seventh horizontal inclination angle η′.

[0069] The positioning holes 718 are composed of circular holes, which are respectively located at the top and the middle of the first fixing part 71, and specifically include a first positioning hole 7180, a second positioning hole 7181, a third positioning hole 7182 and a fourth positioning hole 7183; wherein the first positioning hole 7180, the second positioning hole 7181 and the third positioning hole 7182 are respectively located above the first top locking screw hole 710, the second top locking screw hole 711, the third top locking screw hole 712 and the fourth top locking screw hole 713, and the fourth positioning hole 7183 is located between the top locking screw hole and the middle locking screw hole. The aperture of the positioning hole 718 is smaller than the aperture of the locking screw hole. The positioning hole 718 is used for temporary fixation of the proximal lateral tibial special-shaped block during surgery or for threading sutures or cables.

[0070] 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 71 gradually increases. Specifically, the radius of curvature of the bottom edge of the horizontal section between the top locking screw hole and the middle locking screw hole is R1, and the value range is 30 to 35 mm; the radius of curvature of the bottom edge of the horizontal section between the middle locking screw hole and the first oblique locking screw hole 717 is R2, and the value range is 58 to 63 mm.

[0071] 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 72 is set to an arcuate surface with a certain curvature, and two adjacent fixing screw holes 720 are set in the arcuate surface, and are set at a certain distance along the long axis direction of the second fixing portion 72. The interior of the fixing screw hole 720 is specifically composed of an upper edge 7201 and a lower edge 7202. The surface of the upper edge 7201 is a smooth curved surface that matches the upper screw connection portion of the locking screw, and the surface of the lower edge 7202 is provided with a fastening thread. An intermediate groove 723 is provided between the upper edge 7201 and the lower edge 7202. The aperture of the fixing screw hole 720 is the same as the aperture of the locking screw hole; the portion where the inner surface of the second fixing portion 72 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 72 can be adapted so that the proximal lateral shaped block of the tibia fits the tibial surface more closely; the side surfaces of the second fixing part 72 are respectively provided with a front connecting screw hole 721 and a rear connecting screw hole 722, the front connecting screw hole 721 and the rear connecting screw hole 722 are arranged parallel to the long axis direction of the second fixing part 72, and are respectively located on both sides of the fixing screw hole 720, the front connecting screw hole 721 and the rear connecting screw hole 722 are used to firmly connect the connecting rod to the proximal lateral shaped block of the tibia through locking screws.

[0072] The front connecting screw hole 721 is located at the front side of the second fixing portion 72, and the aperture of the front connecting screw hole 721 is the first aperture D1;

[0073] The rear connecting screw hole 722 is located at the rear side of the side of the second fixing portion 72, and the aperture of the rear connecting screw hole 722 is the second aperture D2;

[0074] The first aperture D1 and the second aperture D2 are equal or different, and the apertures of the front connecting screw hole 721 and the rear connecting screw hole 722 are set to be different in order to be more in line with the bone shape and characteristics of Asians.

[0075] A cross hole 724 is formed at the intersection of the front connecting screw hole 721 and the rear connecting screw hole 722 with the fixing screw hole 720 in the second fixing portion 72 . The cross hole 724 is mainly used to squeeze the connecting rod through the locking screw, so as to fix the connecting rod in the second fixing portion 72 .

[0076] In a specific embodiment, the first connecting rod 20 is inserted into the front connecting screw hole 721, and the second connecting rod 21 is inserted into the rear connecting screw hole 722. When the two ninth locking screws are respectively passed through two adjacent fixing screw holes 720, the ninth upper threaded portion of the ninth locking screw is screwed into the lower edge 7202 of the fixing screw hole 720. As the ninth upper threaded portion is screwed and tightened with the fastening thread, the gap in the middle groove 723 is further compressed, and the screw cap portion of the ninth locking screw stays in the upper edge 7201 of the fixing screw hole 720, respectively squeezing the front connecting screw hole 721 and the rear connecting screw hole 722, while fixing the first connecting rod 20 and the second connecting rod 21 to the second fixing portion 72 through the cross hole 724. The screw portion and the nail head portion of the ninth locking screw are respectively passed through the fixing screw holes 720 and implanted into the bone.

[0077] 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;

[0078] 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.

[0079] During a specific tibial fracture surgery, the doctor aligns and fits the first fixing portion 71 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 first top locking screw hole 710, the second top locking screw hole 711, the third top locking screw hole 712 and the fourth top locking screw hole 713. 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 71 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 anterior connecting rod 21 in sequence. The locking screws are inserted into the connecting screw holes 721 and the rear connecting screw holes 722, and the locking screws are respectively inserted into the two adjacent fixing screw holes 720. After the locking screws are inserted into the fixing screw holes 720, the upper threaded portion of the locking screw is screwed into the lower edge 7202 of the fixing screw hole 720. 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 7201 of the fixing screw hole 720, and the gap of the middle groove 723 is further compressed. The locking screws squeeze the front connecting screw hole 721 and the rear connecting screw hole 722 respectively, and at the same time, the first connecting rod 20 and the second connecting rod 21 are fixed to the second fixing portion 72 through the cross hole 724. The screw portion and the nail head of the locking screw are respectively inserted into the fixing screw holes 720 and implanted into the bone. At this point, the proximal tibia lateral special-shaped block is completely fixed to the proximal tibia.

[0080] A proximal lateral tibia special-shaped block provided by an embodiment of the present invention realizes a cross-locking spatial structure by arranging locking screw holes in different orientations, thereby improving the firmness of fixation with the tibia. It has an integrally formed design and a certain curvature to ensure adhesion, provide a wider wrapping range, and reduce the patient's discomfort.

[0081] 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 portion is an arcuate 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; The first horizontal inclination angle, the second horizontal inclination angle, the third horizontal inclination angle and the fourth horizontal inclination angle decrease in sequence; The middle part of the first fixing part has a first middle locking screw hole, a second middle locking screw hole and a third middle locking screw hole in sequence from the inside to the outside; After the fifth locking screw passes through the first middle locking screw hole, the fifth upper screw-connecting portion of the fifth locking screw is screwed with the first middle locking screw hole, and the vertical inclination angle of the fifth locking screw and the normal of the plane where the second fixing portion is located is a fifth vertical inclination angle; the horizontal inclination angle of the fifth locking screw and the normal of the plane where the second fixing portion is located is a fifth horizontal inclination angle; After the sixth locking screw passes through the second middle locking screw hole, the sixth upper screw connection portion of the sixth locking screw is screwed with the second middle locking screw hole, and the 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; the 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; After the seventh locking screw passes through the third middle locking screw hole, the seventh upper screw connection portion of the seventh locking screw is screwed with the third middle locking screw hole, and the vertical inclination angle between the seventh locking screw and the normal to the plane where the second fixing portion is located is a seventh vertical inclination angle; the horizontal inclination angle between the seventh locking screw and the normal to the plane where the second fixing portion is located is a seventh horizontal inclination angle; The fifth horizontal inclination angle, the sixth horizontal inclination angle and the seventh horizontal inclination angle decrease in sequence; a first oblique locking screw hole, located at the lower part of the first fixing portion; when the eighth locking screw passes through the first oblique locking screw hole, the eighth upper screw connection portion of the eighth locking screw is screwed with the first oblique locking screw hole; a horizontal inclination angle between the eighth locking screw and the normal to the plane where the second fixing portion is located is an eighth horizontal inclination angle; a vertical inclination angle between the eighth locking screw and the normal to the plane where the second fixing portion is located is an eighth vertical inclination angle; the eighth vertical inclination angle intersects with the fifth vertical inclination angle, the sixth vertical inclination angle and the seventh vertical inclination angle respectively; 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 aperture of the front connecting screw hole is a first aperture; 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 ninth upper threaded portion of the ninth 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 proximal lateral tibial special-shaped block according to claim 1, characterized in that: The eighth vertical inclination is greater than the first vertical inclination, the second vertical inclination, the third vertical inclination, the fourth vertical inclination, the fifth vertical inclination, the sixth vertical inclination, and the seventh vertical inclination.

3. The proximal lateral 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 and the fourth vertical inclination angle range from 6 to 10 degrees, the fifth vertical inclination angle, the sixth vertical inclination angle and the seventh vertical inclination angle range from 4 to 8 degrees, and the eighth vertical inclination angle ranges from 11 to 15 degrees.

4. The proximal lateral tibial special-shaped block according to claim 3, characterized in that: The first vertical inclination angle, the second vertical inclination angle, the third vertical inclination angle and the fourth vertical inclination angle are the same; the fifth vertical inclination angle, the sixth vertical inclination angle and the seventh vertical inclination angle are the same.

5. The proximal lateral 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, the fifth vertical inclination angle, the sixth vertical inclination angle and the seventh vertical inclination angle decrease in sequence.

6. The proximal lateral tibial special-shaped block according to claim 1, characterized in that: The eighth 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, the fifth horizontal inclination angle, the sixth horizontal inclination angle, and the seventh horizontal inclination angle.

7. The proximal lateral tibial special-shaped block according to claim 1, characterized in that: The first horizontal inclination angle range is 14 to 18°, the second horizontal inclination angle range is 10 to 14°, the third horizontal inclination angle range is 6 to 10°, the fourth horizontal inclination angle range is 3 to 7°, the fifth horizontal inclination angle range is 12 to 16°, the sixth horizontal inclination angle range is 8 to 12°, the seventh horizontal inclination angle range is 4 to 8°, and the eighth horizontal inclination angle range is 20 to 24°.

8. The proximal lateral tibial special-shaped block according to claim 1, characterized in that: The curvature radius of the bottom edge of the horizontal section of the first fixing portion between the top locking screw hole and the middle locking screw hole is R1, and the value range of R1 is 30 to 35 mm; The curvature radius of the bottom edge of the horizontal section of the first fixing portion between the middle locking screw hole and the first oblique locking screw hole is R2, and the value range of R2 is 58 to 63 mm.

9. The proximal lateral tibial special-shaped block according to claim 1, characterized in that: The first fixing portion also has one or more positioning holes for temporarily fixing the special-shaped block or threading sutures or cables during surgery.

10. 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.

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