CN213250064U

CN213250064U - Femoral component

Info

Publication number: CN213250064U
Application number: CN202021791894.8U
Authority: CN
Inventors: 不公告发明人
Original assignee: Jingwei Medical Equipment Manufacturing Shenzhen Co ltd
Current assignee: Jingwei Medical Equipment Manufacturing Shenzhen Co ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2021-05-25
Anticipated expiration: 2030-08-24

Abstract

The embodiment of the utility model provides a femoral component, which comprises a femoral distal end and a patella component, wherein the patella component comprises a joint surface connected with the femoral distal end and a connecting surface arranged opposite to the joint surface; the shape of the joint curved surface is matched with that of the sliding chute surface, wherein the joint curved surface is a spherical arc-shaped surface, and the arc-shaped radius of the sliding chute surface is the same as that of the joint curved surface; the arc radius of the joint curved surface is more than or equal to 10 mm and less than or equal to 30 mm; the connecting surface is provided with a trabecular bone base structure connected with cortical bone, and the trabecular bone base structure comprises at least one trabecular bone. The arc radius of the sliding groove surface at the distal end of the femur is consistent with the arc radius of the patella component, so that when the two components are different in size, the femoral component and the patella component can be matched with each other for use because the arc section radius is the same.

Description

Femoral component

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a femoral component.

Background

The knee joint is the largest joint of the human body, which consists of the distal femur, the patella, and the proximal tibia, and normally, the components work in coordination, but disease or injury can cause pain and muscle weakness in the knee joint. The pain of the patient can be effectively relieved and the damaged joint of the patient can be restored through the knee joint replacement operation. Knee replacement surgery is the use of prosthetic joints to replace diseased, damaged natural joints.

The femoral component of the knee joint prosthesis and the patella component are matched to form a movable joint, but the size of the femoral component and the size of the patella component on the existing market are different, so that the problem that the femoral component and the patella component cannot be matched to use easily occurs in the operation process.

SUMMERY OF THE UTILITY MODEL

In view of the above, embodiments of the present invention are proposed in order to provide a femoral component that overcomes or at least partially solves the above mentioned problems.

In order to solve the above problem, an embodiment of the present invention discloses a femoral component including a distal femur end and a patella component matching with the distal femur end;

the distal end of the femur comprises a osteotomy surface connected with the femur and an articular surface connected with the patellar component, and the osteotomy surface is opposite to the articular surface; one end of the joint surface is provided with a sliding groove surface for accommodating the patella component to move along a preset track, the sliding groove surface is an inwards concave arc-shaped surface, the middle part of the joint surface is provided with an inner condyle surface and an outer condyle surface at intervals, and the inner condyle surface and the outer condyle surface are both outwards convex curved surfaces; the osteotomy surface comprises a first contact surface, a second contact surface, a third contact surface, a fourth contact surface and a fifth contact surface which are sequentially connected; the first contact surface, the second contact surface, the third contact surface, the fourth contact surface, and the fifth contact surface are all planar surfaces;

the patellar component comprises a joint surface connected with the distal end of the femur and a connecting surface arranged opposite to the joint surface; the shape of the joint curved surface is matched with that of the sliding chute surface, wherein the joint curved surface is a spherical arc-shaped surface, and the arc-shaped radius of the sliding chute surface is the same as that of the joint curved surface; the arc radius of the joint curved surface is more than or equal to 10 mm and less than or equal to 30 mm; the connecting surface is provided with a trabecular bone base structure connected with cortical bone, and the trabecular bone base structure comprises at least one trabecular bone.

Preferably, the trabecular bone base structure is made of a high polymer material, a titanium alloy, a cobalt-chromium-molybdenum alloy or a magnesium alloy material.

Preferably, the tibia bone lining is connected to the middle of the articular surface, the tibia bone lining is sunken downwards and forms a medial condyle groove and a lateral condyle groove which are used for accommodating the medial condyle surface and the lateral condyle surface respectively, and one side of the medial condyle groove is connected with the lateral condyle groove.

Preferably, the tibia liner is provided with a fixing post which is used for penetrating through the distal end of the femur to be connected with the femur, and the fixing post is positioned between the medial condyle groove and the lateral condyle groove and extends towards the distal end of the femur.

Preferably, one end of the distal end of the femur far away from the sliding groove surface is provided with a cam for limiting the position of the fixing column.

Preferably, the middle of the osteotomy surface is provided with an intercondylar notch for the entry of body fluid and the growth of tissues, and the intercondylar notch is of a box-shaped structure.

Preferably, the osteotomy shape is adapted to the distal femur shape.

Preferably, the osteotomy face is attached to the femur by an adhesive.

The application includes the following advantages:

the utility model discloses a femur component, which comprises a femur far end and a patella component matched with the femur far end; the distal end of the femur comprises a osteotomy surface connected with the femur and an articular surface connected with the patellar component, and the osteotomy surface is opposite to the articular surface; one end of the joint surface is provided with a sliding groove surface for accommodating the patella component to move along a preset track, the sliding groove surface is an inwards concave arc-shaped surface, the middle part of the joint surface is provided with an inner condyle surface and an outer condyle surface at intervals, and the inner condyle surface and the outer condyle surface are both outwards convex curved surfaces; the osteotomy surface comprises a first contact surface, a second contact surface, a third contact surface, a fourth contact surface and a fifth contact surface which are sequentially connected; the first contact surface, the second contact surface, the third contact surface, the fourth contact surface, and the fifth contact surface are all planar surfaces; the patellar component comprises a joint surface connected with the distal end of the femur and a connecting surface arranged opposite to the joint surface; the shape of the joint curved surface is matched with that of the sliding chute surface, wherein the joint curved surface is a spherical arc-shaped surface, and the arc-shaped radius of the sliding chute surface is the same as that of the joint curved surface; the arc radius of the joint curved surface is more than or equal to 10 mm and less than or equal to 30 mm; the connecting surface is provided with a trabecular bone base structure connected with cortical bone, and the trabecular bone base structure comprises at least one trabecular bone. The arc radius of the sliding groove surface at the distal end of the femur is consistent with the arc radius of the patella component, so that when the two components are different in size, the femoral component and the patella component can be matched with each other for use because the arc section radius is the same.

Drawings

FIG. 1 is a schematic structural view of an embodiment of a femoral component of the present invention;

fig. 2 is a schematic view of a distal femur end of a femoral component of the present invention;

FIG. 3 is a schematic view of the patellar component of a femoral component of the present invention;

fig. 4 is a top view of a patellar component of a femoral component of the present invention.

1. A distal femur; 11. cutting bone surface; 12. the medial condyle surface; 13. the lateral condylar surface; 14. a chute surface; 2. a patellar component; 21. a joint surface; 22. trabecular bone base structures.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

It should be noted that the embodiments of the present application are used in knee replacement surgery where the distal femur 1 and the tibial insert form a movable joint on the femur, and in arthroplasty where the damaged articular surface is replaced to help restore normal motion to the joint.

Referring to fig. 1 to 4, there are shown schematic structural diagrams of an embodiment of the femoral component of the present invention, which may specifically include the following structures: comprises a distal femur end 1 and a patellar component 2 matched with the distal femur end 1; the distal femur 1 comprises a osteotomy surface 11 connected with the femur and an articulation surface connected with the patellar component 2, the osteotomy surface 11 is opposite to the articulation surface; one end of the joint surface is provided with a sliding groove surface 14 for accommodating the patella component 2 to move along a preset track, the sliding groove surface 14 is an inwards concave arc surface, the middle part of the joint surface is provided with an inner condyle surface 12 and an outer condyle surface 13 at intervals, and the inner condyle surface 12 and the outer condyle surface 13 are both outwards convex curved surfaces; the osteotomy surface 11 comprises a first contact surface, a second contact surface, a third contact surface, a fourth contact surface and a fifth contact surface which are connected in sequence; the first contact surface, the second contact surface, the third contact surface, the fourth contact surface, and the fifth contact surface are all planar.

The patellar component 2 comprises a joint surface 21 connected with the distal end of the femur and a connecting surface arranged opposite to the joint surface; the shape of the joint curved surface is matched with that of the chute surface 14, wherein the joint curved surface 21 is a spherical arc-shaped surface, and the arc-shaped radius of the chute surface 14 is the same as that of the joint curved surface 21; the arc radius of the joint curved surface 21 is more than or equal to 10 mm and less than or equal to 30 mm; the connection face is provided with a trabecular bone base structure 22 connected with cortical bone, the trabecular bone base structure 22 comprising at least one trabecular bone.

The embodiment of the present invention includes a osteotomy surface 11 connected with the femur and an articular surface connected with the patellar component 2 through the femur distal end 1, wherein the osteotomy surface 11 is opposite to the articular surface; one end of the joint surface is provided with a sliding groove surface 14 for accommodating the patella component 2 to move along a preset track, the sliding groove surface 14 is an inwards concave arc surface, the middle part of the joint surface is provided with an inner condyle surface 12 and an outer condyle surface 13 at intervals, and the inner condyle surface 12 and the outer condyle surface 13 are both outwards convex curved surfaces; the osteotomy surface 11 comprises a first contact surface, a second contact surface, a third contact surface, a fourth contact surface and a fifth contact surface which are connected in sequence; the first contact surface, the second contact surface, the third contact surface, the fourth contact surface, and the fifth contact surface are all planar.

The patellar component 2 comprises a joint surface 21 connected with the distal end of the femur and a connecting surface arranged opposite to the joint surface; the shape of the joint curved surface is matched with that of the chute surface 14, wherein the joint curved surface 21 is a spherical arc-shaped surface, and the arc-shaped radius of the chute surface 14 is the same as that of the joint curved surface 21; the arc radius of the joint curved surface 21 is more than or equal to 10 mm and less than or equal to 30 mm; the bone trabecula base structure 22 connected with the cortical bone is arranged on the connecting surface, the bone trabecula base structure 22 comprises at least one bone trabecula, and the bone trabecula base structure is made of high polymer materials, titanium alloys, cobalt-chromium-molybdenum alloys or magnesium alloy materials. The radius of the curved groove surface 14 at the distal end of the femur is kept the same as the radius of the curved patella component 2, so that the femoral component and the patella component 2 can be used in cooperation with each other even if the two components are different in size because the radii of the curved cross sections are the same.

Next, a femoral component in the present exemplary embodiment will be further described.

In the embodiment of the application, the distal femur 1 comprises a osteotomy surface 11 connected with the femur and an articulation surface connected with the patellar component 2, and the osteotomy surface 11 is opposite to the articulation surface; one end of the joint surface is provided with a sliding groove surface 14 for accommodating the patella component 2 to move along a preset track, the sliding groove surface 14 is an inwards concave arc-shaped surface, the middle part of the joint surface is provided with an inner condyle surface 12 and an outer condyle surface 13 at intervals, and the inner condyle surface 12 and the outer condyle surface 13 are both outwards convex curved surfaces and can be matched with the physiological anatomical curved surface of the femoral condyle. The arc radius of the medial condyle surface 12 is greater than or equal to 20 mm and less than or equal to 30 mm, and the arc radius of the lateral condyle surface 13 is greater than or equal to 20 mm and less than or equal to 30 mm; the osteotomy surface 11 comprises a first contact surface, a second contact surface, a third contact surface, a fourth contact surface and a fifth contact surface which are connected in sequence; the first contact surface, the second contact surface, the third contact surface, the fourth contact surface, and the fifth contact surface are all planar.

In a specific embodiment, one end of the articular surface is provided with a sliding groove surface 14 connected with the patella component, the sliding groove surface 14 is an inwardly concave curved surface, the sliding groove surface 14 is formed by extending after the front end of the medial condyle surface 12 and the front end of the lateral condyle surface 13 are connected and fused, and the sliding groove surface 14 is a curved surface with two convex sides and a concave middle in the up-down direction.

In a particular embodiment, the osteotomy face 11 is disposed opposite the articular face.

Further, the osteotomy surface 11 is connected to the femur by an adhesive, wherein the shape of the osteotomy surface 11 is adapted to the shape of the distal femur 1.

Furthermore, an intercondylar notch for the entry of body fluid and the growth of tissues is arranged in the middle of the osteotomy surface 11, and the intercondylar notch is of a box-shaped structure. The intercondylar notch intersects the cross-sectional medial portion, and the intercondylar passage is defined by the intercondylar notch to facilitate entry and growth of bodily fluids and tissues, thereby better fusing the prosthesis with a physiological anatomical structure.

In a specific embodiment, the end of the distal femur 1 away from the sliding groove surface 14 is provided with a cam for limiting the position of the fixing post. The cam is located distal to the posterior upper ends of the medial and

lateral condylar surfaces

12 and 13 and is non-cylindrical.

In the embodiment of the present application, the tibial insert is recessed downward and forms a medial condyle groove and a lateral condyle groove which respectively accommodate the medial condyle surface 12 and the lateral condyle surface 13, and one side of the medial condyle groove is connected with the lateral condyle groove; the cambered surface radius of the medial condyle groove is the same as that of the medial condyle surface 12, and the cambered surface radius of the lateral condyle groove is the same as that of the lateral condyle surface 13.

In a particular embodiment, the tibial insert is recessed downwards and forms a medial condyle and a lateral condyle which respectively house the medial condyle surface 12 and the lateral condyle surface 13, the lateral condyle being flanked by the medial condyle; the tibia liner is provided with a fixing column which is used for penetrating through the distal femur end 1 and is connected with the femur, and the fixing column is located between the medial condyle groove and the lateral condyle groove and extends towards the distal femur end 1.

Furthermore, the medial condyle groove, the lateral condyle groove and the fixing post are of an integrally-formed structure.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrase "in one embodiment" or "in an embodiment of the present application" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the above description, for the sake of clarity, the structure and operation of the present invention will be described with the help of directional terms, but the terms "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be understood as convenient terms and should not be construed as limiting terms.

It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art should understand that the present invention is not limited by the described order of acts, as some steps may be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art will also appreciate that the embodiments described in the specification are presently preferred and that no particular act is required in order to implement the invention.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the invention.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.

The above detailed description is made on the femoral component provided by the present invention, and the principle and the implementation of the present invention are explained by applying specific examples, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. A femoral component for articulating a distal femur and a patellar component in a knee replacement procedure, comprising a distal femur and a patellar component coupled to the distal femur;

2. The femoral component of claim 1, wherein the trabecular base structure is comprised of a polymeric material, a titanium alloy, a cobalt chromium molybdenum alloy, or a magnesium alloy material.

3. The femoral component of claim 1, further comprising a tibial insert attached to the medial portion of the articular surface, the tibial insert being recessed downward and forming a medial condyle and a lateral condyle to receive the medial condyle and the lateral condyle, respectively, the medial condyle being flanked by the lateral condyle.

4. The femoral component of claim 3, wherein the tibial insert is provided with an anchoring post for connection to the femur through the distal femur end, the anchoring post extending distally of the femur between the medial and lateral condyles.

5. The femoral component of claim 4, wherein the distal end of the femur remote from the trochlear surface is provided with a cam for limiting the position of the fixation post.

6. The femoral component of claim 1, wherein the osteotomy face is medially configured with an intercondylar notch for entry of bodily fluids and tissue growth, the intercondylar notch having a box-like configuration.

7. The femoral component of claim 1, wherein the osteotomy shape is adapted to the distal femoral shape.

8. The femoral component of any of claims 1-7, wherein the osteotomy face is coupled to the femur by an adhesive.