CN107928843B

CN107928843B - Tibia platform prosthesis component and knee joint prosthesis component with same

Info

Publication number: CN107928843B
Application number: CN201711111786.4A
Authority: CN
Inventors: 丁子一; 孟德松
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2017-11-10
Filing date: 2017-11-10
Publication date: 2023-07-28
Anticipated expiration: 2037-11-10
Also published as: CN107928843A

Abstract

The invention provides a tibial plateau prosthesis component and a knee joint prosthesis component with the same, wherein the tibial plateau prosthesis component comprises: the tibia platform body is arranged at one end of the tibia, which is close to the femur; the first end of the fibula prosthesis is rotatably arranged on the tibia plateau body, and the second end of the fibula prosthesis is fixedly connected with the fibula. The technical scheme of the invention effectively solves the problem that the fibula of the patient is in a free state after the artificial total knee arthroplasty in the prior art, thereby affecting the activity of the patient.

Description

Tibia platform prosthesis component and knee joint prosthesis component with same

Technical Field

The invention relates to the field of medical instruments, in particular to a tibial plateau prosthesis component and a knee joint prosthesis component with the tibial plateau prosthesis component.

Background

The artificial prosthesis replacement is to adopt metal, high molecular polyethylene, ceramic and other materials, make artificial prosthesis according to the shape, structure and function of human skeleton, implant the artificial prosthesis into human body through surgical technique, replace the function of diseased joint, achieve the purpose of relieving joint pain and recovering joint function. The main purpose of artificial total knee arthroplasty is to relieve pain caused by pathological joint, correct joint deformity, improve knee joint function of patient, thereby improving life quality of patient, when congenital deformity at fibula of knee joint of patient or when proximal tibia and proximal fibula of patient are tumor, the proximal tibia needs to be cut off bone by a large margin, and the fibula of patient is in free state after cutting off bone, which can have a certain influence on activity of patient.

Disclosure of Invention

The invention aims to provide a tibia platform prosthesis component and a knee joint prosthesis component with the tibia platform prosthesis component, so as to solve the problem that in the prior art, fibula of a patient is in a free state after an artificial total knee joint replacement operation, and further the activity of the patient is affected.

To achieve the above object, according to one aspect of the present invention, there is provided a tibial plateau prosthesis assembly comprising: the tibia platform body is arranged at one end of the tibia, which is close to the femur; the first end of the fibula prosthesis is rotatably arranged on the tibia plateau body, and the second end of the fibula prosthesis is fixedly connected with the fibula.

Further, the fibula head prosthesis comprises a first connecting section and a second connecting section, wherein the first connecting section is rotatably connected with the tibia plateau body, and the second connecting section is hinged with the first connecting section and fixedly connected with the fibula.

Further, the first connection section and the second connection section are connected by a universal joint.

Further, a boss is arranged on the lower surface of the tibial plateau body, the first connecting section is rotatably arranged on the boss, the end face of the first connecting section is contacted with a matching plane of the boss, the upper surface of the tibial plateau body is a plane, and an included angle between the matching plane and the upper surface of the tibial plateau body is between 10 degrees and 15 degrees.

Further, the second connecting section comprises a base body and a plurality of bone plates which are connected with each other, the base body is hinged with the first connecting section, the bone plates are arranged at intervals along the circumferential direction of the base body, and the bone plates are connected with the fibula through fasteners.

Further, the root of each bone fracture plate is connected with the base body, the end part of each bone fracture plate extends towards the direction far away from the femur, each bone fracture plate is provided with a fixing hole, each fixing hole comprises two round holes, and the two round holes are intersected.

Further, the bone plate is a curved plate.

Further, the basal body is provided with a sewing hole and a microporous layer, and the sewing hole is arranged at the edge of the microporous layer.

Further, the microporous layer has a microporous structure, and the microporous structure at least meets one of the following conditions: the pore diameter of the micropore structure is between 1000 μm and 1800 μm; the porosity of the microporous structure is between 70% and 85%; the thickness of the microporous structure is between 0.5mm and 2 mm.

According to another aspect of the present invention, there is provided a knee joint prosthesis assembly comprising a tibial plateau prosthesis assembly as described above.

By applying the technical scheme of the invention, the fibula prosthesis is rotatably arranged on the tibia platform body, the fibula prosthesis is fixedly connected with the fibula, and the fibula is fixedly connected with the tibia through the tibia platform body. Even if the tibia of a patient is cut off after receiving a large-amplitude osteotomy, the ligament attachment point on the tibia is cut off, the proximal end of the fibula is in a free state, and the fibula can still be connected and fixed with the tibia through the fibular bone prosthesis and the tibia platform body. The technical scheme realizes the fixation of the truncated fibula and avoids injury to the patient caused by the free fibula in the patient; simultaneously, the supporting function of the fibula on the tibia is recovered, the supporting strength of the tibia and the fibula after operation is improved, and the influence of artificial knee joint prosthesis replacement operation on the normal life of a patient is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

fig. 1 shows a schematic structural view of an embodiment of a tibial plateau prosthesis assembly in accordance with the present invention;

FIG. 2 shows a schematic view of the structure of a fibular bone prosthesis of the tibial plateau prosthesis assembly of FIG. 1; and

fig. 3 shows a schematic view of the structure of the tibial plateau body of the tibial plateau prosthesis assembly of fig. 1.

Wherein the above figures include the following reference numerals:

10. a tibial plateau body; 11. a boss; 20. fibular bone prosthesis; 21. a first connection section; 22. a second connection section; 221. a base; 222. a bone plate; 223. stitching the hole; 224. a microporous layer.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

When the knee joint of the patient is damaged, diseased or deformed, the original skeleton can be replaced by the artificial prosthesis to restore the physiological function of the patient, so that the knee joint of the patient can normally move, further the patient can normally complete actions such as bending the knee, and the life quality of the patient is improved. When the patient's tibia is severely damaged or the proximal tibia of the patient is a neoplastic condition, the fibular bone and the junction between the fibula and tibia may be cut off with the affected tibia. At this time, although the proximal tibial spacer compensates for the solid structure between the tibial plateau and the primary tibial section, the fibula is in a free state in the patient due to the fact that only one end of the fibula is fixed, on the one hand, the free end of the fibula can move in the patient, and damage is caused to the patient, on the other hand, the tibia loses the support of the fibula, and the activity of the patient can be influenced.

As shown in fig. 1, the tibial plateau prosthesis assembly of this embodiment includes a tibial plateau body 10 and a fibular head prosthesis 20. Wherein, the tibia plateau body 10 is arranged at one end of tibia near femur, the first end of fibula head prosthesis 20 is rotatably arranged on the tibia plateau body 10, and the second end of fibula head prosthesis 20 is fixedly connected with fibula.

By applying the technical scheme of the embodiment, the fibula bone prosthesis 20 is rotatably arranged on the tibia plateau body 10, the fibula bone prosthesis 20 is fixedly connected with the fibula, and the fibula is fixedly connected with the tibia through the tibia plateau body 10. Even if the tibia of a patient is cut off after receiving a large-amplitude osteotomy, the ligament attachment point on the tibia is cut off, the proximal end of the fibula is in a free state, and the fibula can still be connected and fixed with the tibia through the fibular bone prosthesis and the tibia platform body. The technical scheme realizes the fixation of the truncated fibula and avoids injury to the patient caused by the free fibula in the patient; simultaneously, the supporting function of the fibula on the tibia is recovered, the supporting strength of the tibia and the fibula after operation is improved, and the influence of artificial knee joint prosthesis replacement operation on the normal life of a patient is reduced.

Preferably, the tibial plateau body 10 and the fibular head prosthesis 20 of the present embodiment are made of titanium alloy. In other embodiments not shown, the tibial plateau body and fibular head prosthesis may be made of a biocompatible material such as titanium, cobalt chrome molybdenum alloy, carbon fiber, or 316L stainless steel.

Specifically, as shown in fig. 1 and 2, the fibular bone prosthesis 20 of the present embodiment includes a first connecting section 21 and a second connecting section 22, wherein the first connecting section 21 is rotatably connected with the tibial plateau body 10, and the second connecting section 22 is hinged with the first connecting section 21 and fixedly connected with the fibula. The structure enables the fibula after operation to rotate relative to the tibia, so as to realize the actions of the original bones as much as possible.

Preferably, as shown in fig. 2, the first connection section 21 and the second connection section 22 of the present embodiment are connected by a universal joint. The first and second joint sections 21, 22 of the universal joint connection further enhance the mobility between the tibia and fibula to meet the needs of the patient's daily life.

Further, as shown in fig. 3, the lower surface of the tibial plateau body 10 of the present embodiment is provided with a boss 11, the first connecting section 21 is rotatably disposed on the boss 11 and connected by a bolt, the end surface of the first connecting section 21 contacts with the mating plane of the boss 11, the upper surface of the tibial plateau body 10 is a plane, and the included angle between the mating plane and the upper surface of the tibial plateau body 10 is between 10 ° and 15 °. The tibial plateau body 10 is provided with a structure such as a cushion block which is required to be fixed and is wear-resistant, so that the matching effect between the tibial plateau body 10 and the cushion block is ensured, and the upper surface of the tibial plateau body 10 is always arranged to be a plane and is fixedly connected with the cushion block through a fixing structure arranged on the upper surface of the tibial plateau body 10. The matching plane of the boss 11 in this embodiment forms an included angle of 10 ° to 15 ° with the upper surface, so that the connection relationship between the fibula and the tibia is more similar to that of the original bone, and the mobility between the tibia and the fibula is further improved, so as to meet the daily life needs of the patient.

Preferably, the axis of the first connecting section 21 of the present embodiment is arranged perpendicular to the mating plane. The structure is simple and easy to realize, and the second connecting section 22 can deviate from the boss 11 for a distance, so that the operation is convenient. In other embodiments, the axis of the first connecting section may be disposed at an angle to the normal to the mating plane to move the second connecting section closer to the native bone.

Specifically, as shown in fig. 1 and 2, the second connecting section 22 of the present embodiment includes a base 221 and a plurality of bone plates 222 connected to each other, the base 221 being hinged to the first connecting section 21, the plurality of bone plates 222 being disposed at intervals along the circumference of the base 221, the bone plates 222 being connected to the fibula by fasteners. The plurality of bone plates 222 provide for uniform fibular loading and are not easily separated from the fibular prosthesis. The fastener of this example is preferably a cancellous bone screw, and in other embodiments, the fastener may be replaced with a cortical bone screw, a ligament screw, or the like that is capable of providing a connection fixation.

Specifically, as shown in fig. 2, the root of each bone plate 222 of the present embodiment is connected to the base 221, and the end of each bone plate 222 extends in a direction away from the femur, and each bone plate 222 is provided with a fixing hole, which includes two circular holes that intersect. It should be noted that the intersection here refers to an intersection in the geometric sense of a plane, that is, two circles in the same plane have two intersections. The fixing hole of this embodiment can improve the fixed effect of fibula. Preferably, the bone plate 222 of the present embodiment is provided with two fixation holes in the extension direction of the bone plate 222 to prevent rotation of the fibula relative to the bone plate 222. Further preferably, as shown in fig. 1 and 2, the bone plate 222 of the present embodiment is a curved plate, so that the curved form of the inner surface of the bone plate 222 is adapted to the outer surface of the fibula, so as to increase the contact area between the fibula and the bone plate and improve the fixing effect.

The external shape of the fibular bone prosthesis in this embodiment can be customized by adopting image data acquired in a CT/MRI mode or the like, so as to improve the fit degree of the fibular bone prosthesis and the patient's own bone, and further improve the postoperative recovery effect.

Preferably, the base 221 and bone plate 222 of the present embodiment are integrally formed. Further, as shown in fig. 2, the substrate 221 of the present embodiment is provided with a stitching hole 223 and a microporous layer 224, and the stitching hole 223 is provided at the edge of the microporous layer 224. The microporous layer 224 is a microporous structure with a certain porosity and thickness, the solid structure in the microporous structure forms trabeculae, and the ligament structure can grow into the trabeculae to achieve connection. The ligament structure can be an artificial ligament or a patient autologous ligament. The microporous layer 224 can fix the collateral fibula ligament of the patient and further recover the original physiological functions of fibula and tibia of the patient.

During the operation, the fibula collateral ligament may be primarily connected and fixed with the microporous layer 224 through the suture holes 223 to fix the relative position between the ligament structure and the second substrate 221. Following the healing of the patient's wound after the operation, the fibula collateral ligament can grow into the microporous layer 224, avoids the ligament structure to shift when the patient moves.

The microporous layer 224 is a microporous structure that satisfies at least one of the following conditions: the pore diameter of the micropore structure is between 1000 μm and 1800 μm; the porosity of the microporous structure is between 70% and 85%; the thickness of the microporous structure is between 0.5mm and 2 mm. The above structure ensures the connection strength between the fibula collateral ligament and the microporous layer 224, and further improves the safety of patients.

The present invention also provides a knee joint prosthesis component (not shown in the figures) according to the present embodiment, which includes a tibial plateau prosthesis component, and the tibial plateau prosthesis component is a tibial plateau prosthesis component including the above technical features. The knee prosthesis assembly of the present embodiment is capable of securing a patient's truncated fibula.

From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

the tibia platform body is rotatably provided with a fibula prosthesis which is fixedly connected with the fibula and enables the fibula to be fixedly connected with the tibia through the tibia platform body. Even if the tibia of a patient is cut off after receiving a large-amplitude osteotomy, the ligament attachment point on the tibia is cut off, the proximal end of the fibula is in a free state, and the fibula can still be connected and fixed with the tibia through the fibular bone prosthesis and the tibia platform body. The technical scheme realizes the fixation of the truncated fibula and avoids injury to the patient caused by the free fibula in the patient; simultaneously, the supporting function of the fibula on the tibia is recovered, the supporting strength of the tibia and the fibula after operation is improved, and the influence of artificial knee joint prosthesis replacement operation on the normal life of a patient is reduced.

In the description of the present application, it should be understood that, where azimuth terms such as "front, rear, upper, lower, left, right", "transverse, vertical, horizontal", and "top, bottom", etc., indicate azimuth or positional relationships generally based on those shown in the drawings, only for convenience of description and simplification of the description, these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are merely for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and thus should not be construed as limiting the scope of the present application.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A tibial plateau prosthesis assembly, comprising:

the tibia platform body (10) is arranged at one end of the tibia, which is close to the femur;

a fibula prosthesis (20), wherein a first end of the fibula prosthesis (20) is rotatably arranged on the tibia plateau body (10), and a second end of the fibula prosthesis (20) is fixedly connected with a fibula;

the fibula prosthesis (20) comprises a first connecting section (21) and a second connecting section (22), the first connecting section (21) is rotatably connected with the tibia plateau body (10), and the second connecting section (22) is hinged with the first connecting section (21) and fixedly connected with the fibula;

a boss (11) is arranged on the lower surface of the tibial plateau body (10), the first connecting section (21) is rotatably arranged on the boss (11), the end face of the first connecting section (21) is contacted with the matching plane of the boss (11), and the upper surface of the tibial plateau body (10) is a plane;

the second connecting section (22) comprises a base body (221) and a plurality of bone plates (222) which are connected with each other, the base body (221) is hinged with the first connecting section (21), the bone plates (222) are arranged at intervals along the circumference of the base body (221), and the bone plates (222) are connected with fibula through fasteners.

2. The tibial plateau prosthesis assembly of claim 1, wherein said first connection section (21) and said second connection section (22) are connected by a universal joint.

3. The tibial plateau prosthesis assembly of claim 1, wherein the angle between the mating plane and the upper surface of the tibial plateau body (10) is between 10 ° and 15 °.

4. The tibial plateau prosthesis assembly of claim 1, wherein the root of each of said bone plates (222) is connected to said base (221), and the end of each of said bone plates (222) extends away from said femur, each of said bone plates (222) being provided with a fixation hole, said fixation hole comprising two circular holes, said two circular holes intersecting.

5. The tibial plateau prosthesis assembly of claim 4, wherein said bone plate (222) is a curved plate.

6. The tibial plateau prosthesis component of claim 1, wherein said base body (221) is provided with stitching holes (223) and a microporous layer (224), said stitching holes (223) being provided at the edges of said microporous layer (224).

7. The tibial plateau prosthesis component of claim 6, wherein said microporous layer (224) is a microporous structure that satisfies at least one of the following conditions:

the pore size of the microporous structure is between 1000 μm and 1800 μm;

the porosity of the microporous structure is between 70% and 85%;

the thickness of the microporous structure is between 0.5mm and 2 mm.

8. A knee joint prosthesis component comprising a tibial plateau prosthesis component, wherein the tibial plateau prosthesis component is the tibial plateau prosthesis component of any one of claims 1 to 7.