Animal Femoral Implant

Abstract

The present invention relates to an animal femoral implant and, more specifically, to an animal femoral implant, which may enable artificial hip joint replacement for animals, may enable the implant to be firmly fixed to the animal femur by spontaneous bone growth of the animal, thereby preventing complications such as aseptic dissociation and bone resorption around the cement, which may occur when using bone cement, and may cause a porous part, which has relatively low strength due to a plurality of pores formed therein, to be protected by a frame part, which has relatively high strength due to a solid face formed therein, thereby preventing damage to the porous part in which the edge thereof is broken or bent by friction with the bone or by an external force in the process of inserting the femur implant into the animal femur and eliminating a problem in that porous particles that may be generated when the porous part is damaged penetrate into blood vessels and the like to cause various inflammatory reactions.

Claims

1. An animal femoral implant comprising a body part inserted into the femur of an animal, a coupling part to which an artificial femoral head is coupled, and a neck part connecting the body part and the coupling part.

2. The animal femoral implant of claim 1, wherein the body part comprises a bone growth part formed in the proximal portion to promote bone growth and a stem part formed in the distal portion to facilitate insertion into the femur.

3. The animal femoral implant of claim 2, wherein the bone growth part is formed to extend in the distal direction while being expanded from the distal end of the neck part to form a step.

4. The animal femoral implant of claim 3, wherein the bone growth part comprises a porous part having a plurality of pores formed therein to promote bone growth.

5. The animal femoral implant of claim 4, wherein the bone growth part comprises a frame part that forms a solid face to protect the porous part.

6. The animal femoral implant of claim 5, wherein the frame part is formed along the edge of the bone growth part.

7. The animal femoral implant of claim 6, wherein the porous part and the frame part are manufactured by 3D printing.

8. The animal femoral implant of claim 6, wherein the porous part and the frame part, which are adjacent, have the same level.

9. The animal femoral implant of claim 2, wherein the stem part is formed to extend in the distal direction while being reduced from the distal end of the bone growth part to form a step.

10. The animal femoral implant of claim 1, wherein a size of the neck part varies depending on a size of the coupling part.

11. The animal femoral implant of claim 10, wherein as the size of the coupling part increases, the size of the neck part increases, and wherein as the size of the coupling part decreases, the size of the neck part decreases.

12. An animal femoral implant comprising a body part inserted into the femur of an animal, a coupling part to which an artificial femoral head is coupled, and a neck part connecting the body part and the coupling part, the body part comprising a bone growth part formed in the proximal portion to promote bone growth and a stem part formed in the distal portion to facilitate insertion into the femur, and the bone growth part further comprising a locking hole into which a locking bolt is inserted to prevent sinking.

13. The animal femoral implant of claim 12, wherein the locking hole is formed on the outer surface of the bone growth part.

14. The animal femoral implant of claim 13, wherein a hole central axis of the locking hole is perpendicular to a stem axis.

15. The animal femoral implant of claim 13, wherein a hole central axis of the locking hole is not perpendicular to the stem axis.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0067] FIG. 1 is a view illustrating a femur implant used in a conventional artificial hip joint replacement.

[0068] FIG. 2 is a perspective view of an animal femoral implant according to an embodiment of the present invention.

[0069] FIG. 3 is a view illustrating the animal femoral implant in FIG. 2 when viewed from the anterior side.

[0070] FIG. 4 is a view illustrating the animal femoral implant in FIG. 2 when viewed from the inside.

[0071] FIG. 5 is a view illustrating the animal femoral implant in FIG. 2 when viewed from a proximal portion.

[0072] FIG. 6 is a view illustrating the animal femoral implant in FIG. 2 when viewed from a distal portion.

[0073] FIG. 7 is a view showing that a porous part and a frame part, which are adjacent, have the same level.

[0074] FIG. 8 is a view showing that the size of a neck part varies depending on the size of a coupling part.

[0075] FIG. 9 is a view illustrating an animal femoral implant according to another embodiment of the present invention.

[0076] FIG. 10 is a view illustrating an animal femoral implant according to another embodiment of the present invention.

[0077] FIG. 11 is a view illustrating the usage state of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

[0078] Hereinafter, preferred embodiments of an animal femoral implant according to the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, if it is determined that a detailed description of a well-known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Unless otherwise specified, all terms in this specification have the same meaning as the terms generally understood by those of ordinary skill in the art to which the present invention belongs, and in case of conflict of meaning therewith, it will be construed as the definition used in the specification.

[0079] A femur implant 1 for animals according to the present invention is an implant that is transplanted implanted into the femur of an animal to enable artificial hip joint replacement for animals, and the entire implant 1 may be preferably manufactured by 3D printing. The femur implant 1 for animals may have a porous part such that the implant may be firmly fixed to the animal femur by spontaneous bone growth of the animal without bone cement, thereby preventing complications such as aseptic dissociation and bone resorption around the cement, which may occur when using the bone cement.

[0080] In addition, the porous part, which has relatively low strength due to a plurality of pores formed therein, may be protected by a frame part that has relatively high strength due to a solid face formed therein, thereby preventing damage to the porous part in which the edge thereof is broken or bent by friction with the bone or by an external force in the process of inserting the femur implant 1 into the animal femur and eliminating a problem in that porous particles that may be generated when the porous part is damaged penetrate into blood vessels and the like to cause various inflammatory reactions.

[0081] FIG. 2 is a perspective view of a femur implant 1 for animals according to an embodiment of the present invention. Referring to FIG. 2, the femur implant 1 for animals according to the present invention includes, as primary elements, a body part 10, a neck part 30, and a coupling part 50.

[0082] The body part 10 is a configuration to be inserted into the femur of an animal and primarily indicates the remaining portions, excluding the neck part 30 and the coupling part 50, which will be described later. The body part 10 is a part to be implanted into the femur marrow cavity of an animal, and is preferably configured to be easily inserted into the marrow cavity and to be rapidly fused with the bone after being implanted into the correct place. To this end, the body part 10 may have a tapered shape in which the cross-sectional area is reduced toward the distal portion as shown in FIGS. 2 to 4. The method of manufacturing the body part 10 is not limited to any specific concept, and, preferably, it may be manufactured by 3D printing.

[0083] FIG. 3 is a view of the femur implant 1 for animals in FIG. 2 when viewed from the anterior side. Referring to FIG. 3, the body part 10 includes a bone growth part 11 and a stem part 13.

[0084] The bone growth part 11 is a configuration formed in the proximal portion of the body part 10 to promote bone growth, and the bone growth part 11 may be formed to extend in the distal direction while expanding from the distal end of the neck part 30, which will be described later, to form a step S. Accordingly, bone growth is promoted by increasing the surface area of the bone growth part 11, thereby preventing the range of joint movement of the implant from being limited, compared to the range of anatomical joint movement, due to interference between the neck part 30 and the acetabular fossa cup, which will be described later. Since natural bone growth is promoted through the bone growth part 11, bone cement may not be used in the process of fixing the body part 10 to the animal femur.

[0085] The bone growth part 11 includes a porous part 111 and a frame part 113.

[0086] The porous part 111 may be configured to have a plurality of pores formed to promote bone growth, enabling the femur implant 1 for animals to be fixed to the femur by bone growth so as not to use bone cement, thereby preventing complications such as aseptic dissociation and bone resorption around the cement, which may occur when using bone cement. The porous part 111 may be preferably formed by 3D printing.

[0087] The frame part 113 is a configuration that forms a solid face and, preferably, may be formed along the edge of the bone growth part 11. That is, as shown in FIGS. 2 to 6, it is preferable that the frame part 113 is formed in all of the portions where the porous structure layers meet to form a boundary in the porous part 111. As shown in FIGS. 2 to 6, the porous part 111 may be formed on four surfaces of the body part 10, and the frame part 113 may be formed at the edge where the surfaces meet to protect the edge of the porous part 111. The frame part 113 may be configured in the bone growth part 11 so that the porous part 111, which has relatively low strength due to a plurality of pores formed therein, may be protected by the frame part 113, thereby preventing damage to the weak porous part 111 in which the edge thereof is broken or bent by friction with the bone or by an external force in the process of inserting the femur implant 1 for animals into the animal femur, and eliminating a problem in that porous particles that may be generated when the porous part 111 is damaged penetrate into blood vessels and the like to cause various inflammatory reactions.

[0088] The porous part 111 and the frame part 113 may be manufactured by 3D printing. Accordingly, the femur implant 1 for animals may be manufactured more easily, and a customized implant suitable for each animal may be provided.

[0089] Referring to FIG. 7, the adjacent porous part 111 and frame part 113 may be configured to have the same level. The same level indicates that the portions where the porous part 111 and the frame part 113 meet have the same height, as shown in FIG. 7, while no one thereof protrudes. Through this configuration, the relatively weak porous part 111 may be protected by the frame part 113 and the porous part 111 may come into close contact with the intraosseous wall when the body part 10 is inserted into the marrow cavity of an animal, thereby promoting bone growth.

[0090] The stem part 13 is a configuration formed in the distal portion of the body part 10 to facilitate insertion of the body part 10 into the femur marrow cavity of an animal and stably fix the body part into the femur by the inserted stem part 13. The stem part 13 may be formed to extend from the distal end of the bone growth part 11 in the distal direction so as to be reduced while forming a step S. Accordingly, the femur implant 1 for animals may be easily inserted into the femur marrow cavity of an animal. As shown in FIGS. 2 to 4, the stem part 13 may be configured to have a solid surface formed thereon to reduce frictional force by a smooth surface and increase physical strength. The stem part 13 may also be manufactured by 3D printing.

[0091] The neck part 30 is a configuration for connecting the body part 10 and a coupling part 50, which will be described later, and interference within a certain range may be prevented by the neck part 30 to restore the anatomical joint movement of the animal. The femur implant 1 for animals may be configured to vary in the size of the neck part 30 depending on the size of the coupling part 50 to be described later.

[0092] Referring to FIG. 8, for example, if the cross-sectional area of the point A in the coupling part 50 is 12.23 mm.sup.2, the cross-sectional area of the point B in the neck part 30 may be 9.75 mm.sup.2, and if the cross-sectional area of the point A in the coupling part 50 is 24.59 mm.sup.2, the cross-sectional area of the point B in the neck part 30 may be 19.97 mm.sup.2, and if the cross-sectional area of the point A in the coupling part 50 is 41.21 mm.sup.2, the cross-sectional area of the point B in the neck part 30 may be 33.61 mm.sup.2.

[0093] That is, the femur implant 1 for animals may be configured such that as the size of the coupling part 50 to be described later increases, the size of the neck part 30 increases and such that as the size of the coupling part 50 to be described later decreases, the size of the neck part 30 decreases.

[0094] Unlike humans whose body sizes are similar between normal adults, animals are significantly different in their body sizes among small animals, middle animals, and large animals. As the size of animal increases, for example, small animals, middle animals, and large animals, the size of an artificial femoral head coupled to the femur implant 1 for animals increases, and the size of the coupling part 50, which will be described later, also increases. In the case where the coupling part 50 is relatively large compared to the neck part 30, the neck part 30 becomes relatively thin and fails to withstand the concentrated stress to be easily damaged.

[0095] Thus, in the present invention, a femur implant 1 for animals may be configured such that the larger the coupling part 50, the larger the neck part 30 and such that the smaller the coupling part 50, the smaller the neck part 30, thereby preventing damage to the neck part 30 while minimizing the interference problem by the neck part 30.

[0096] The coupling part 50 is a configuration to which the artificial femoral head is coupled, and may be formed to extend from the proximal portion of the neck part 30. Although the coupling part 50 is not limited to any specific shape, it may preferably be configured to have a truncated-cone shape. The coupling part 50 may be machined to satisfy the coupling condition with the artificial femoral head. That is, after the entire implant 1 is manufactured by 3D printing, only the coupling part 50 may be separately machined.

[0097] FIG. 9 is a view of a femur implant 1 for animals according to another embodiment of the present invention, in which a locking hole 115 is added to the bone growth part 11, so the following description will focus on the newly added locking hole 115 in order to avoid duplicate descriptions.

[0098] The locking hole 115 is a configuration to which a locking bolt is inserted to prevent sinking of the implant, and may be formed on the outer surface of the bone growth part 11 as shown in FIG. 9. Preferably, the locking hole 115 may be machined. By configuring the locking hole 115 in the bone growth part 11 such that a locking bolt may engage with the locking hole 115, it is possible to prevent sinking of the animal femur implant 1 inserted into the animal femur.

[0099] In addition, among the bone growth part 11, the locking hole 115 may be formed on the outer surface of the bone growth part 11 such that a locking bolt may be inserted from the outside to the inside of the animal femur, thereby ensuring the field of view of a surgeon and the convenience of surgery in the artificial hip joint replacement surgery.

[0100] The locking hole 115 may be configured such that a hole center axis AH is perpendicular to a stem axis AS. Accordingly, the surgeon may more easily fasten the locking bolt to the locking hole 115 in a surgical situation in which the field of view of a surgeon is extremely limited by blood, body fluid, foreign substances, or the like.

[0101] FIG. 10 is a view of a femur implant 1 for animals according to another embodiment of the present invention, in which the locking hole 115 is formed on the bone growth part 11 to be inclined. That is, unlike that shown in FIG. 9, the locking hole 115 is configured such that the hole center axis is not perpendicular to the stem axis. As shown in FIG. 10, the locking hole 115 may be configured such that the hole center axis A.sub.H is inclined at a certain angle with respect to the stem axis A.sub.s, instead of being perpendicular thereto, it is possible to more effectively prevent the sinking of the implant inserted into the animal femur. Although the inclination of the locking hole 115 is directed in the distal direction in FIG. 10, the inclination direction of the locking hole 115 may be configured to be directed in the proximal direction opposite the same.

[0102] FIG. 11 is a view showing the usage state of the present invention. Referring to FIG. 11, a femur implant 1 for animals according to the present invention may be regarded as a prosthesis inserted into the marrow cavity of the animal femur F during artificial hip joint replacement surgery for animals, as shown in FIG. 11. The femur implant 1 for animals enables artificial hip joint replacement for animals, and, as described above, the femur implant 1 for animals does not require bone cement by configuring the porous part 111, thereby preventing various problems that may be caused by the use of bone cement.

[0103] Above all, the porous part 111 may form a solid face so as to be protected by a relatively strong frame part 113, thereby preventing damage to the porous part 111 in which the edge thereof is broken or bent by friction with the bone or by an external force in the process of inserting the femur implant 1 for animals into the animal femur. Porous particles, which are fine particles separated from the porous part 111, may be generated when the porous part is damaged and penetrate into blood vessels and the like to cause various inflammatory reactions. However, the present invention fundamentally prevents damage to the porous part 111 through the configuration of the frame part 113, and thus may also prevent problems caused by the porous particles.

[0104] The above detailed description exemplifies the present invention. In addition, the above description shows preferred embodiments of the present invention, and the present invention may be used in various other combinations, modifications, and environments. That is, changes or modifications are possible within the scope of the concept of the invention disclosed herein, the scope equivalent to the disclosure, and/or within the scope of skill or knowledge in the art. The disclosed embodiment is intended to describe the best mode for implementing the technical idea of the present invention, and various changes required in specific application fields and uses of the present invention are possible. Accordingly, the detailed description of the present invention is not intended to limit the present invention to the disclosed embodiments. Also, the appended claims should be construed as encompassing other embodiments.