A tibial tray prosthesis assembly and an artificial ankle joint prosthesis

Abstract

The application discloses a tibial tray prosthesis assembly and artificial ankle joint prosthesis. The tibial tray prosthesis assembly comprises a tibial tray, a connecting part and a keel. The connecting part is connected with the tibial tray. The connecting part is clamped between the keel and the tibial tray, and the keel has a first main body connected with one side of the connecting part away from the tibial tray and a guide part connected with the first main body in the extension direction of the connecting part. The end of the guide part away from the first main body protrudes outside the extension direction of the connecting part, and the cross section of the guide part perpendicular to the extension direction of the first main body gradually decreases in the direction away from the first main body. Compared with the prior art, the tibial tray prosthesis assembly can be smoothly inserted into the tibia of a patient, and the efficiency of ankle replacement surgery is improved.

Description

Technical Field

[0001] This invention relates to the field of medical rehabilitation devices, and in particular to a tibial support prosthesis assembly and an artificial ankle joint prosthesis. Background Technology

[0002] Total ankle replacement surgery is used to relieve pain in patients with osteoarthritis and preserve the natural movement of the ankle joint. However, the treatment of total ankle replacement is still in its early stages. While it has become a viable surgical option for treating ankle arthritis and is gradually gaining wider application, many problems remain. In existing artificial ankle joint prostheses, the tibial support component needs to be fixed to the tibia. During surgery, surgeons often face difficulties in smoothly inserting the tibial support component to the patient's tibia, resulting in low efficiency.

[0003] Therefore, there is an urgent need to provide a new tibial support prosthesis component and an artificial ankle joint prosthesis that can overcome the above-mentioned defects. Summary of the Invention

[0004] The purpose of this invention is to provide a tibial support prosthesis assembly and an artificial ankle joint prosthesis, which enables doctors to smoothly insert the tibial support prosthesis assembly into the patient's tibia, thereby improving the efficiency of ankle replacement surgery.

[0005] To address the above problems, embodiments of the present invention provide a tibial support prosthesis assembly, comprising:

[0006] Tibial support;

[0007] A connecting portion, which connects to the tibial support; and

[0008] The keel, the connecting portion is clamped between the keel and the tibia support, and the keel has a first main body connected to the side of the connecting portion away from the tibia support and a guide portion connected to the first main body along the extension direction of the connecting portion, the end of the guide portion away from the first main body protruding out of the extension direction of the connecting portion; wherein the cross section of the guide portion perpendicular to the extension direction of the first main body gradually decreases in the direction away from the first main body.

[0009] Compared with the prior art, the present invention sets the guide portion of the keel to have a cross-section that gradually decreases in the direction away from the first body, perpendicular to the extension direction of the first body. This setting allows the guide portion of the keel to be more easily inserted into the pre-drilled hole in the tibia during the insertion of the keel into the human tibia, thus achieving the guiding function of the keel insertion into the tibia. This enables the doctor to insert the tibial support prosthesis component into the patient's tibia more smoothly, improving the efficiency of ankle replacement surgery.

[0010] In one embodiment, the guide portion has at least three guide surfaces, one end of each guide surface is connected to the first body, and the other end of each guide surface converges at an angle away from the first body.

[0011] In one embodiment, the guide portion has two pairs of oppositely arranged guide surfaces, wherein one pair of oppositely arranged guide surfaces extends obliquely in a direction away from the first body and intersects to form a first intersection line, and the other pair of oppositely arranged guide surfaces are respectively connected to the two ends of the first intersection line.

[0012] In one embodiment, the guide surface is a plane or a convex arc surface.

[0013] In one embodiment, the connecting portion has a second body connected to the first body and a guiding portion connected to the second body along its extension direction. The guiding portion and the guide portion are located on the same side of the tibial support prosthesis assembly. One end of the guide portion away from the first body protrudes outward from the outer side of the end of the guiding portion away from the second body, and the guiding portion has two guiding surfaces that converge obliquely in the direction away from the second body.

[0014] In one embodiment, the guiding surface is an arc surface, and both guiding surfaces are concave inward.

[0015] In one embodiment, the two guiding surfaces intersect to form a second intersection line, which extends along the direction from the tibia support to the keel, and the end of the guide portion opposite to the first body protrudes outward from the second intersection line.

[0016] Another embodiment of the present invention also provides an artificial ankle joint prosthesis, comprising:

[0017] Tibial support prosthesis assembly as described above;

[0018] A tibial pad, operably connected to the tibial support; and

[0019] The talus-side prosthesis is rotatably connected to the side of the tibial pad opposite to the tibial support. The side of the talus-side prosthesis opposite to the tibial pad has a mounting surface. The mounting surface has three parallel and non-collinear ridges. The three ridges extend obliquely in the direction opposite to the mounting surface. The centers of the connections between each ridge and the mounting surface are sequentially connected to form an isosceles triangle.

[0020] In one embodiment, the ridge at the vertex of the isosceles triangle is the main pile, and the other two ridges are secondary piles. The distance between the main pile and the secondary pile is between 10-13 mm, and the distance between the two secondary piles is between 14-16 mm.

[0021] In one embodiment, the diameter of the main pile and the secondary pile is between 4.5 and 5.5 mm. Attached Figure Description

[0022] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0023] Figure 1 This is a schematic diagram of the structure of a tibial support prosthesis assembly according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of an artificial ankle joint prosthesis according to another embodiment of the present invention;

[0025] Figure 3 This is a perspective view of an artificial ankle joint prosthesis according to another embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of a talus-side prosthesis according to another embodiment of the present invention.

[0027] Figure label:

[0028] 100. Tibial support prosthesis assembly; 10. Tibial support; 20. Connecting part; 21. Second body; 22. Guiding part; 221. Guiding surface; 222. Second intersection line; 30. Keel; 31. First body; 32. Guide part; 321. Guide surface; 322. First intersection line; 200. Tibial pad; 300. Taurus side prosthesis; 41. Mounting surface; 42. Spine; 421. Main post; 422. Secondary post. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of the present invention to enable the reader to better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0030] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the art will recognize that embodiments may be practiced without one or more of these specific details. In other instances, well-known apparatuses, structures, and techniques associated with this application may not have been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0031] Unless the context requires otherwise, throughout the specification and claims, the word “comprising” and its variations, such as “including” and “having”, shall be understood to have an open, inclusive meaning, that is, to be interpreted as “including, but not limited to”.

[0032] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings to provide a clearer understanding of the purpose, features, and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative of the essential spirit of the technical solution of the present invention.

[0033] Throughout this specification, references to "an embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0034] The singular forms “a” and “the” used in this specification and the appended claims include plural references unless otherwise expressly stated herein. It should be noted that the term “or” is generally used to mean “and / or” unless otherwise expressly stated herein.

[0035] In the following description, in order to clearly demonstrate the structure and working method of the present invention, a number of directional terms will be used. However, terms such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and not as limiting terms.

[0036] Embodiments of the present invention are described below with reference to the accompanying drawings.

[0037] like Figure 1 , Figure 2 as well as Figure 3As shown, an embodiment of the present invention provides a tibial support prosthesis assembly 100, which includes a tibial support 10, a connecting portion 20, and a keel 30. The connecting portion 20 is connected to the tibial support 10 and is sandwiched between the keel 30 and the tibial support 10. The keel 30 has a first body 31 connected to the side of the connecting portion 20 opposite to the tibial support 10 and a guide portion 32 connected to the first body 31 along the extending direction of the connecting portion 20. The end of the guide portion 32 opposite to the first body 31 protrudes out of the extending direction of the connecting portion 20, wherein the cross-section of the guide portion 32 perpendicular to the extending direction of the first body 31 gradually decreases in the direction opposite to the first body 31.

[0038] During ankle replacement surgery, a hole is pre-drilled in the tibia, and the guide portion 32 of the keel 30 is inserted into the hole. Subsequently, the first body 31 is also fully inserted into the hole. Compared to the prior art, this embodiment of the invention sets the guide portion 32 of the keel 30 such that its cross-section, perpendicular to the extension direction of the first body 31, gradually decreases in the direction away from the first body 31. This design allows the guide portion 32 of the keel 30 to be more easily inserted into the pre-drilled hole in the tibia during insertion, achieving a guiding function for the insertion of the keel 30 into the tibia. This enables the surgeon to more smoothly insert the tibial support prosthesis assembly 100 into the patient's tibia, improving the efficiency of ankle replacement surgery.

[0039] Preferably, such as Figure 1 As shown, the guide portion 32 has two pairs of opposing guide surfaces 321. One pair of opposing guide surfaces 321 extend obliquely away from the first body 31 and intersect to form a first intersection line 322. The other pair of opposing guide surfaces 321 are connected to both ends of the first intersection line 322. This arrangement facilitates processing. It should be understood that, preferably, the guide surface 321 can be a plane or a convex arc surface, and the guide surface 321 can also be set as other unconventional surfaces, as long as the cross-section of the guide portion 32 perpendicular to the extension direction of the first body 31 gradually decreases in the direction away from the first body 31, it does not depart from the scope of the present invention. It should be understood that the guide portion 32 has at least three guide surfaces 321, one end of each guide surface 321 is connected to the first body 31, and the other end of each guide surface 321 converges obliquely in the direction away from the first body 31. Setting the guide surface 321 to three, four, or more can all not depart from the scope of the present invention, and those skilled in the art can set it according to actual needs.

[0040] In addition, such as Figure 1As shown, the connecting part 20 has a second body 21 connected to the first body 31 and a guiding part 22 connected to the second body 21 along its extension direction. The guiding part 22 and the guide part 32 are located on the same side of the tibial support prosthesis assembly 100. The end of the guide part 32 away from the first body 31 protrudes out on the outside of the end of the guiding part 22 away from the second body 21, and the guiding part 22 has two guiding surfaces 221 that converge at an angle in the direction away from the second body 21.

[0041] During ankle replacement surgery, a hole is pre-drilled in the tibia, and the guide portion 32 of the keel 30 is inserted into the hole. As the guide portion 32 of the keel 30 is partially inserted into the hole, the guide portion 22 below the guide portion 32 gradually pushes open the cancellous bone towards the tibia. The guide portion 22 is configured to have two guide surfaces 221 that converge at an angle away from the second body 21, i.e., the end side of the guide portion 22 forms a "blade", making it easier for the guide portion 22 to push open the cancellous bone.

[0042] Preferably, such as Figure 1 As shown, the guiding surface 221 is an arc surface, and both guiding surfaces 221 are concave inward. This design facilitates processing. It should be understood that the guiding surface 221 can also be set as a plane or other unconventional surface, without departing from the scope of the present invention. Those skilled in the art can make the setting according to actual needs.

[0043] In addition, such as Figure 1 As shown, the two guiding surfaces 221 intersect to form a second intersection line 222, which extends along the direction from the tibialis support 10 to the keel 30. The guide portion 32, at one end opposite to the first body 31, protrudes outward from the outer side of the second intersection line 222. This arrangement facilitates processing. It should be understood that the second intersection line 222 can also extend in other directions without departing from the scope of the invention, and those skilled in the art can configure it according to actual needs.

[0044] like Figure 1 , Figure 2 , Figure 3 as well as Figure 4As shown, another embodiment of the present invention also provides an artificial ankle joint prosthesis, including: a tibial support prosthesis assembly 100, a tibial pad 200, and a talus-side prosthesis 300. The tibial support prosthesis assembly 100 includes: a tibial support 10, a connecting portion 20, and a keel 30. The connecting portion 20 is connected to the tibial support 10 and is clamped between the keel 30 and the tibial support 10. The keel 30 has a first body 31 connected to the side of the connecting portion 20 opposite to the tibial support 10 along the extending direction of the connecting portion 20, and a guide portion 32 connected to the first body 31. One end of the guide portion 32 opposite to the first body 31 protrudes outward from the extending direction of the connecting portion 20, wherein the cross-section of the guide portion 32 perpendicular to the extending direction of the first body 31 gradually decreases in the direction opposite to the first body 31. The tibial pad 200 is operably connected to the tibial support 10. The talar-side prosthesis 300 is rotatably connected to the tibial pad 200 on the side opposite to the tibial support 10. The talar-side prosthesis 300 has a mounting surface 41 on the side opposite to the tibial pad 200. Three parallel and non-collinear ridges 42 are provided on the mounting surface 41. The three ridges 42 extend obliquely in the direction opposite to the mounting surface 41, and the centers of the connections between each ridge 42 and the mounting surface 41 are sequentially connected to form an isosceles triangle. In practice, the three ridges 42 are usually set to be obliquely inclined towards the guide portion 32, and all three ridges 42 form a 45° angle with the mounting surface 41.

[0045] During ankle replacement surgery, a hole is pre-drilled in the tibia, and the guide portion 32 of the keel 30 is inserted into the hole. Then, the first main body 31 is also fully inserted into the hole, and the talus-side prosthesis 300 is fixedly installed on the talus. Subsequently, a hole is drilled in the talus, and the spine 42 is inserted into the hole, again fixing the talus-side prosthesis 300 to the talus. Finally, the tibial pad 200 is connected to the tibial support 10 and the talus-side prosthesis 300.

[0046] Compared with the prior art, the present invention provides an embodiment in which the guide portion 32 of the keel 30 is configured such that its cross-section, perpendicular to the extension direction of the first body 31, gradually decreases in the direction away from the first body 31. This configuration allows the end of the guide portion 32 of the keel 30 to be more easily inserted into the pre-drilled hole in the tibia during the insertion of the keel 30 into the human tibia, thus achieving the guiding function of the keel 30 into the tibia. This enables the doctor to insert the tibial support prosthesis assembly 100 into the patient's tibia more smoothly, thereby improving the efficiency of ankle replacement surgery.

[0047] Furthermore, such as Figure 4As shown, the ridge 42 at the vertex of the isosceles triangle is the main post 421, and the other two ridges 42 are secondary posts 422. The distance between the main post 421 and the secondary posts 422 is between 10-13 mm, and the distance between the two secondary posts 422 is between 14-16 mm. Compared with existing talus-side prostheses, this spacing of the ridges is narrower, which is more in line with the anatomical characteristics of the ankle joint of Chinese people, and will prevent the situation where the talus-side prosthesis 300 cannot be correctly installed on the talus. Those skilled in the art can set it according to actual needs.

[0048] Preferably, such as Figure 4 As shown, the diameters of the main post 421 and the secondary post 422 are between 4.5 and 5.5 mm. Compared with existing talus-side prostheses, the reduced diameters of the main post 421 and the secondary post 422 facilitate the insertion of the talus-side prosthesis 300 into the talus. Those skilled in the art can adjust the settings according to actual needs.

[0049] The preferred embodiments of the present invention have been described in detail above, but it should be understood that, if necessary, aspects of the embodiments can be modified to utilize aspects, features, and concepts from various patents, applications, and publications to provide other embodiments.

[0050] In light of the detailed description above, these and other changes can be made to the embodiments. Generally, the terminology used in the claims should not be considered limited to the specific embodiments disclosed in the specification and claims, but should be understood to include all possible embodiments together with the full scope of equivalents enjoyed by these claims.

[0051] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of the present invention.

Claims

1. A tibial support prosthesis assembly, characterized in that, include: Tibial support; The connecting part is connected to the tibial support; as well as The keel, wherein the connecting portion is clamped between the keel and the tibia support, and the keel has a first main body connected to the side of the connecting portion away from the tibia support and a guide portion connected to the first main body along the extension direction of the connecting portion, wherein the end of the guide portion away from the first main body protrudes out of the extension direction of the connecting portion; wherein the cross section of the guide portion perpendicular to the extension direction of the first main body gradually decreases in the direction away from the first main body. The connecting portion has a second body connected to the first body and a guiding portion connected to the second body along its extending direction. The guiding portion and the guide portion are located on the same side of the tibial support prosthesis assembly. The end of the guide portion away from the first body protrudes outward from the end of the guiding portion away from the second body, and the guiding portion has two guiding surfaces that converge obliquely in the direction away from the second body. The guiding surface is an arc surface, and both guiding surfaces are concave inward; the two guiding surfaces intersect to form a second intersection line, which extends along the direction from the tibia support to the keel, and the end of the guide portion away from the first body protrudes outward from the second intersection line. The guide portion has at least three guide surfaces, one end of each guide surface is connected to the first body, and the other end of each guide surface converges at an angle away from the first body.

2. The tibial support prosthesis assembly according to claim 1, characterized in that, The guide portion has two pairs of oppositely arranged guide surfaces, one pair of oppositely arranged guide surfaces extending obliquely in a direction away from the first body and intersecting to form a first intersection line, and the other pair of oppositely arranged guide surfaces being connected to both ends of the first intersection line respectively.

3. The tibial support prosthesis assembly according to claim 2, characterized in that, The guide surface is either a plane or a convex arc surface.

4. An artificial ankle joint prosthesis, characterized in that, include: Tibial support prosthesis assembly as described in any one of claims 1 to 3; Tibial pad, which is operatively connected to the tibia support; as well as The talus-side prosthesis is rotatably connected to the side of the tibial pad opposite to the tibial support. The side of the talus-side prosthesis opposite to the tibial pad has a mounting surface. The mounting surface has three parallel and non-collinear ridges. The three ridges extend obliquely in the direction opposite to the mounting surface. The centers of the connections between each ridge and the mounting surface are sequentially connected to form an isosceles triangle.

5. The artificial ankle joint prosthesis according to claim 4, characterized in that, The ridge at the vertex of the isosceles triangle is the main pile, and the other two ridges are secondary piles. The distance between the main pile and the secondary pile is between 10 and 13 mm, and the distance between the two secondary piles is between 14 and 16 mm.

6. The artificial ankle joint prosthesis according to claim 5, characterized in that, The diameter of the main pile and the secondary pile is between 4.5 and 5.5 mm.

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