Femoral implant for animals

Abstract

The present invention relates to a femoral implant for animals, and more particularly, to a femoral implant for animals, which can perform hip arthroplasty for animals, firmly fix the implant to the femur of the animal by means of spontaneous bone growth of the animal to prevent complications such as aseptic loosening that can occur when using bone cement, bone resorption around the cement, etc., and which is formed with a plurality of voids in a porous portion and is relatively weak in strength, is protected by a support portion formed with a solid surface and is relatively strong in strength to secure prevention of damage problems such as chipping or bending due to friction between the edge of the porous portion and the bone or external force during insertion of the femoral implant into the femur of the animal, and block various inflammatory reactions and the like problems caused by the penetration of porous particles into blood vessels due to damage to the porous portion.

Description

Technical Field

[0001] This invention relates to a femoral implant for animals, and more specifically, to a femoral implant for animals that enables hip replacement surgery, wherein the implant is firmly fixed to the animal's femur by the animal's spontaneous bone growth, preventing complications such as aseptic loosening that may occur when using bone cement and bone resorption around the cement. The porous portion has multiple pores and is relatively weak, protected by a support portion that forms a solid surface and is relatively strong, to ensure that during the insertion of the femoral implant into the animal's femur, damage such as breakage or bending caused by friction between the edge of the porous portion and the bone or external force is prevented, and to block various inflammatory reactions caused by the infiltration of porous particles into blood vessels that may occur when the porous portion is damaged. Background Technology

[0002] The hip joint is the point where the acetabular fossa on the lateral side of the pelvis meets the femoral head of the femur, forming a ball-and-socket joint. Its characteristic feature is that it allows for joint movement in multiple directions.

[0003] The acetabulum and femoral head are covered by articular cartilage. On the lateral side of the acetabulum, the labrum covers the femoral head together with the acetabulum. Laterally, the articular capsule surrounds the acetabulum and femoral neck together.

[0004] The femur that makes up the hip joint can be roughly divided into the following parts according to its location: the femoral head; the femoral neck that tapers from the femoral head and connects to the intertrochanteric part; and the intertrochanteric part, which connects the greater trochanter and lesser trochanter and is covered by multiple muscles.

[0005] When severe pain in the hip joint is caused by arthritis, fracture, or other diseases, and the symptoms do not improve after physical therapy or medication, total hip replacement surgery should be considered. This is a surgical procedure that replaces the problematic joint with an artificial hip joint.

[0006] Total hip replacement surgery is a procedure in which damaged bone and articular cartilage are removed and the entire hip joint is replaced with an artificial joint.

[0007] On the femoral side, the femoral head is removed, and a metal femoral stem is inserted and fixed into the femoral medullary cavity. A metal or ceramic ball is inserted into the upper end of the femoral stem to replace the removed femoral head.

[0008] On the pelvic side, the damaged acetabular cartilage is removed, and a metal socket, i.e., the acetabular cup, is inserted into the acetabulum for fixation using metal screws or cement. A plastic, ceramic, or metal liner is then inserted into the acetabular cup to ensure smooth contact between the ball and the socket.

[0009] In addition to total hip replacement surgery, artificial hip replacement surgery also includes: partial artificial joint replacement surgery, which is performed on the femoral side only when there is damage or disease to the articular cartilage of the femoral head but no problem on the acetabular side; and surface replacement surgery, which is similar to total replacement surgery, but without removing the femoral head, an artificial joint implant with a shape that can cover the femoral head is inserted.

[0010] Figure 1 The image shows a femoral implant (90) used in conventional total hip arthroplasty, which is disclosed in Korean Patent Publication No. 10-2005-0112919 (December 1, 2005). The conventional femoral implant (90) consists of a main body (91), a neck (93), and a connecting part (95).

[0011] The aforementioned main body (91) refers to the structure that is inserted into and fixed into the medullary cavity of the femur; the aforementioned neck refers to the structure that extends in the proximal direction and connects with the connecting part (95) and the aforementioned main body (91); the aforementioned connecting part (95) refers to the artificial femoral head (H) truncated conical structure formed at the proximal end of the femoral implant (90) for insertion and assembly into contact with the acetabular cup (A).

[0012] When fixing this femoral implant (90) into the femoral medullary cavity, bone cement is mainly used. Mid- to long-term follow-up observations of patients receiving cemented femoral implants have shown that aseptic loosening and severe bone resorption around the cement are common complications. Therefore, research on cementless implants that do not use cement for fixation of the aforementioned femoral implant (90) into the femur is actively underway.

[0013] As mentioned above, femoral implants (90) are designed for human transplantation, but their limitation lies in the inability to be applied to animals with different anatomical structures than bipedal humans (such as dogs and cats). Furthermore, as people's living standards improve and family structures become increasingly nuclear, the number of people keeping companion animals continues to grow. Therefore, the demand for medical technologies that can treat both humans and animals experiencing physical ailments is increasing, but in reality, there are no dedicated medical devices for treating animals.

[0014] When animals develop hip diseases similar to those in humans, the lack of specialized implants to replace the animal's hip joint makes it impossible to provide appropriate surgeries such as artificial hip replacement.

[0015] Therefore, the relevant industry requires the introduction of a brand-new technology, namely the development of an animal implant that reflects the animal's anatomical structure, which can restore the movement of the animal's knee joint during total knee replacement surgery, thereby ensuring the animal can walk normally after the operation.

[0016] Therefore, the relevant industry requires the introduction of a brand-new technology, namely the development of an animal implant that reflects the animal's anatomical structure, to achieve artificial hip replacement surgery for animals, so as to restore the movement of the animal's knee joint and thus ensure the animal's normal walking after surgery.

[0017] Patent Document 1: Korean Patent Publication No. 10-2005-0112919 (December 1, 2005) Summary of the Invention

[0018] The problem that the invention aims to solve

[0019] The present invention aims to solve the above-mentioned problems.

[0020] The purpose of this invention is to provide a femoral implant for animals to enable artificial hip replacement surgery in animals.

[0021] Another object of the present invention is to construct a main body, a neck extending from the proximal end of the main body, and a connecting portion extending from the proximal end of the neck, so that the main body can be inserted and fixed into the femur of an animal, and interference within a certain range can be prevented by the neck, allowing the anatomical joint movement of the animal to be restored, and the connecting portion is placed so that the artificial femoral head is attached to the connecting portion.

[0022] Another object of the present invention is to construct a bone growth portion on the proximal end of the main body portion so that the main body portion can be firmly fixed to the femur of the animal by spontaneous bone growth, even without the use of bone cement.

[0023] Another object of the present invention is to construct a handle on the distal end of the main body, which makes it easier to insert the main body into the femoral medullary cavity of an animal, and allows the main body to be stably fixed in the femur by means of the inserted handle.

[0024] Another object of the present invention is that the bone growth portion is configured to form a step with the distal end of the neck and extends in the distal direction, thereby promoting bone growth by increasing the surface area of ​​the bone growth portion, while preventing the problem of limited joint range of motion of the implant due to the interference between the neck and the acetabular cup, compared to the limited range of motion of the anatomical joint.

[0025] Another objective of the present invention is to construct a porous portion with multiple pores on the bone growth portion, so that the implant is fixed to the femur by bone growth, thereby preventing complications such as aseptic loosening that may occur when bone cement is used, and bone resorption around the cement, without the use of bone cement.

[0026] Another object of the present invention is to construct a support portion on the bone growth portion so that the porous portion with multiple gaps and relatively weak strength can be protected by the aforementioned support portion.

[0027] Another objective of the present invention is to construct the support portion, which has a solid surface and relatively high strength, to be formed along the edge of the bone growth portion, so as to prevent damage such as breakage or bending caused by friction or external force between the edge of the porous portion and the bone during the insertion of the femoral implant into the femur of an animal, and to block various inflammatory reactions caused by the infiltration of porous particles into blood vessels when the porous portion is damaged.

[0028] Another object of the present invention is to make the manufacture of femoral implants for animals easier by 3D printing a porous portion with multiple gaps and a support portion with a solid surface, and to provide customized implants suitable for various animals.

[0029] Another object of the present invention is to construct adjacent porous portions and support portions at the same level to ensure that the relatively weaker porous portions can be protected by the support portions, but when the main body portion is inserted into the bone marrow cavity of an animal, the aforementioned porous portions are brought into close contact with the inner wall of the bone to promote bone growth.

[0030] Another object of the present invention is to construct a stem that tapers from the distal end of the bone growth portion to form a step and extends in the distal direction, thereby facilitating insertion of the femoral implant for animals into the femoral medullary cavity of the animal.

[0031] Another objective of this invention is that the size of the artificial femoral head incorporated into the femoral implant for animals increases with the size of small, medium, and large animals, and the size of the connecting portion also increases accordingly. When the size of the connecting portion is relatively larger than the neck, the neck becomes relatively thin and cannot withstand concentrated stress, and the neck is also easily damaged. Therefore, a femoral implant for animals should be constructed in which the size of the neck also increases when the size of the connecting portion increases, and the size of the neck also decreases when the size of the connecting portion decreases, so as to minimize the interference problems caused by the neck and prevent neck damage problems.

[0032] Another object of the present invention is to construct a locking hole in the bone growth portion so that a locking bolt can be fixed to the locking hole, thereby preventing the animal femoral implant inserted into the animal femur from settling.

[0033] Another objective of the present invention is to construct a locking hole on the outer side of the bone growth portion so that the locking bolt can be inserted from the outer side of the femur to the inner side, thereby ensuring the surgeon's field of vision and surgical convenience during artificial hip replacement surgery in animals.

[0034] Another object of the present invention is that the central axis of the locking hole is configured to be perpendicular to the axis of the handle, so as to ensure that the surgeon can more easily fix the locking bolt to the locking hole in surgical situations where the surgeon's field of vision is extremely limited due to blood, body fluids, relics, etc.

[0035] Another objective of the present invention is that the central axis of the locking hole is not perpendicular to the axis of the handle, but is constructed to be tilted at a certain angle to ensure more effective prevention of sinking of the implant inserted into the femur of the animal.

[0036] Methods for solving problems

[0037] To achieve the above objectives, the present invention is implemented by means of embodiments having the following structure.

[0038] According to one embodiment of the present invention, the present invention is characterized by comprising: a main body portion inserted into the femur of an animal, a connecting portion for attaching an artificial femoral head, and a neck portion connecting the main body portion and the connecting portion.

[0039] According to another embodiment of the present invention, the present invention is characterized in that the main body portion includes: a bone growth portion formed on the proximal end to promote bone growth, and a stem portion formed on the distal end to facilitate insertion into the femur.

[0040] According to another embodiment of the present invention, the present invention is characterized in that the bone growth portion expands from the distal end of the neck to form a step and extends in the distal direction.

[0041] According to another embodiment of the present invention, the present invention is characterized in that the bone growth portion includes: a porous portion having a plurality of pores to promote bone growth.

[0042] According to another embodiment of the present invention, the present invention is characterized in that the bone growth portion includes a support portion forming a solid surface to protect the porous portion.

[0043] According to another embodiment of the present invention, the present invention is characterized in that the above-mentioned support portion is formed along the edge of the above-mentioned bone growth portion.

[0044] According to another embodiment of the present invention, the present invention is characterized in that the above-mentioned porous portion and the above-mentioned support portion are manufactured by 3D printing.

[0045] According to another embodiment of the present invention, the present invention is characterized in that the adjacent perforated portions are at the same level as the support portions.

[0046] According to another embodiment of the present invention, the present invention is characterized in that the aforementioned stem portion tapers from the distal end of the aforementioned bone growth portion to form a step and extends in the distal direction.

[0047] According to another embodiment of the present invention, the present invention is characterized in that the size of the neck of the above-mentioned femoral implant for animals varies with the size of the joint portion.

[0048] According to another embodiment of the present invention, the present invention is characterized in that, when the size of the joint portion of the above-mentioned femoral implant for animals increases, the size of the neck also increases, and when the size of the joint portion decreases, the size of the neck also decreases.

[0049] According to another embodiment of the present invention, the present invention is characterized by comprising: a main body portion inserted into the femur of an animal, a connecting portion for attaching an artificial femoral head, and a neck portion connecting the main body portion and the connecting portion; the main body portion comprising: a bone growth portion formed at a proximal end to promote bone growth, and a handle portion formed at a distal end to facilitate insertion into the femur; the bone growth portion further comprising: a locking hole into which a locking bolt for preventing settlement is inserted.

[0050] According to another embodiment of the present invention, the present invention is characterized in that the locking hole is formed on the outer surface of the bone growth portion.

[0051] According to another embodiment of the present invention, the present invention is characterized in that the central axis of the locking hole is perpendicular to the axis of the handle.

[0052] According to another embodiment of the present invention, the present invention is characterized in that the central axis of the locking hole is not perpendicular to the axis of the handle.

[0053] Invention Effects

[0054] The present invention achieves the following effects through the foregoing embodiments and the construction, combination and use relationships described below.

[0055] The advantage of this invention is that it provides a femoral implant for animals to achieve artificial hip replacement surgery in animals.

[0056] The advantages of this invention are that by constructing a main body, a neck extending from the proximal end of the main body, and a connecting portion extending from the proximal end of the neck, the main body can be inserted into the femur of an animal for fixation. The neck can prevent interference within a certain range, allowing the anatomical joint movement of the animal to be restored. The connecting portion is then placed to attach the artificial femoral head to the connecting portion.

[0057] The advantage of this invention is that by constructing a bone growth portion on the proximal end of the main body, the main body can be firmly fixed to the animal's femur by spontaneous bone growth, even without the use of bone cement.

[0058] The advantage of this invention is that by constructing a handle on the distal end of the main body, the insertion of the main body into the femoral medullary cavity of an animal is made easier, and the main body can be stably fixed in the femur by means of the inserted handle.

[0059] The advantage of this invention is that the bone growth portion is constructed to form a step with the distal end of the neck and extends in the distal direction, thereby promoting bone growth by increasing the surface area of ​​the bone growth portion, while preventing the limitation of the joint range of motion of the implant caused by the interference between the neck and the acetabular cup, which is a problem compared to the limitation of the range of motion of the anatomical joint.

[0060] The advantage of this invention is that it constructs a porous portion with multiple pores on the bone growth portion, so that the implant is fixed to the femur by bone growth, thereby preventing aseptic loosening and complications such as bone resorption around the cement that may occur when bone cement is used, without the use of bone cement.

[0061] The advantage of this invention is that a support portion is constructed on the bone growth portion, so that the porous portion with multiple gaps and relatively weak strength can be protected by the support portion.

[0062] The effect of this invention is that the support portion, which has a solid surface and relatively high strength, is constructed to form along the edge of the bone growth portion. This ensures that during the insertion of the femoral implant into the animal femur, damage problems such as breakage or bending caused by friction or external force between the edge of the porous portion and the bone are prevented. It also blocks various inflammatory reactions that may occur when the porous portion is damaged, due to the infiltration of porous particles into blood vessels.

[0063] The advantage of this invention is that by using 3D printing to manufacture a porous portion with multiple gaps and a support portion with a solid surface, it makes the production of femoral implants for animals easier and provides customized implants suitable for various animals.

[0064] The advantage of this invention is that by constructing adjacent porous portions and support portions at the same level, the relatively weaker porous portions can be protected by the support portions, but when the main body is inserted into the medullary cavity, the porous portions are brought into close contact with the inner wall of the bone to promote bone growth.

[0065] The advantage of this invention is that the structure tapers from the distal end of the bone growth portion to form a step, and the stem extends in the distal direction, making insertion of the femoral implant into the femoral medullary cavity of the animal easier.

[0066] The advantage of this invention is that the size of the artificial femoral head incorporated into the femoral implant for animals increases with the size of small, medium, and large animals, and the size of the connecting portion also increases accordingly. When the size of the connecting portion is relatively larger than the neck, the neck becomes relatively thin and cannot withstand concentrated stress, and the neck is also easily damaged. Therefore, an animal femoral implant should be constructed in which the size of the neck also increases when the size of the connecting portion increases, and the size of the neck also decreases when the size of the connecting portion decreases, so as to minimize the interference problems caused by the neck and prevent neck damage problems.

[0067] The advantage of this invention is that a locking hole is constructed on the bone growth portion so that a locking bolt can be fixed to the locking hole, thereby preventing the animal femoral implant inserted into the animal femur from settling.

[0068] The advantage of this invention is that by constructing a locking hole on the outer surface of the bone growth region, a locking bolt can be inserted from the outer side of the femur to the inner side, thereby ensuring the surgeon's field of vision and facilitating the procedure during artificial hip replacement surgery in animals.

[0069] The advantage of this invention is that the central axis of the locking hole is configured to be perpendicular to the axis of the handle, so that in surgical situations where the surgeon's field of vision is extremely limited due to blood, bodily fluids, or remains, the surgeon can more easily fix the locking bolt to the locking hole.

[0070] The advantage of this invention is that the central axis of the locking hole is not perpendicular to the axis of the handle, but is constructed to be tilted at a certain angle to ensure more effective prevention of the implant inserted into the femur of the animal from settling. Attached Figure Description

[0071] Figure 1 The image shows a femoral implant used in existing total hip arthroplasty procedures.

[0072] Figure 2 The image shown is a perspective view of an animal femoral implant according to an embodiment of the present invention.

[0073] Figure 3 yes Figure 2 A front view of an animal femoral implant.

[0074] Figure 4 yes Figure 2 An internal view of an animal femoral implant.

[0075] Figure 5 yes Figure 2 A proximal view of an animal femoral implant.

[0076] Figure 6 yes Figure 2 A distal view of an animal femoral implant.

[0077] Figure 7 The diagram shows that the adjacent porous sections and the support sections are at the same level.

[0078] Figure 8 This shows how the size of the neck varies with the size of the joint.

[0079] Figure 9 The accompanying drawings are related to an animal femoral implant according to an embodiment of the present invention.

[0080] Figure 10 The accompanying drawings are related to an animal femoral implant according to another embodiment of the present invention.

[0081] Figure 11 This is a diagram showing the usage state of the present invention. Detailed Implementation

[0082] Preferred embodiments of the femoral implant for animals according to the present invention will now be described in detail with reference to the accompanying drawings. In the following description of the invention, detailed descriptions of well-known functions or structures will be omitted if they would unnecessarily obscure the essence of the invention. Unless otherwise defined, all terms in this specification have the same general meaning as understood by one of ordinary skill in the art to which this invention pertains, and in the event of any conflict between the meanings of terms used herein and the definitions used herein, the definitions shall prevail.

[0083] The present invention relates to an animal femoral implant (1), which is an implant that can be transplanted into the femur of an animal to achieve artificial hip replacement surgery. Preferably, the entire implant (1) can be manufactured by 3D printing technology. The above-mentioned animal femoral implant (1) has a porous portion so that the implant can be firmly fixed to the femur by the spontaneous bone growth of the animal without the need for bone cement. Therefore, it can prevent complications such as aseptic loosening and bone resorption around the cement that may occur when bone cement is used.

[0084] In addition, the porous portion has multiple pores and is relatively weak, and is protected by a support portion that forms a solid surface and is relatively strong, so as to prevent damage such as breakage or bending caused by friction between the edge of the porous portion and the bone or external force during the insertion of the femoral implant (1) into the femur of the animal, and to block various inflammatory reactions caused by the infiltration of porous particles into blood vessels when the porous portion is damaged.

[0085] Figure 2 The image shown is a perspective view of an animal femoral implant according to an embodiment of the present invention, with reference to... Figure 2 As described above, the femoral implant (1) for animals of the present invention generally includes: a main body (10), a neck (30) and a connecting part (50).

[0086] The aforementioned main body (10) is the structure inserted into the femur of an animal, and can be considered as the general term for the remaining parts excluding the neck (30) and the fusion portion (50) described later. The aforementioned main body (10) is the portion transplanted into the medullary cavity of the femur of the animal. Preferably, it should be constructed to facilitate insertion into the medullary cavity and to allow for rapid fusion with the bone after localization and transplantation. Therefore, the aforementioned main body (10) is as follows... Figures 2 to 4 As shown, it has a tapered shape that gradually tapers towards the distal end. The manufacturing method of the above-mentioned main body (10) is not limited to any specific concept, but preferably, it can be manufactured by 3D printing.

[0087] Figure 3 yes Figure 2A front view of an animal femoral implant, with reference to... Figure 3 The main body (10) described above includes: a bone growth portion (11) and a stem portion (13).

[0088] The aforementioned bone growth portion (11) is formed at the proximal end of the aforementioned main body portion (10) to promote bone growth. The aforementioned bone growth portion (11) expands from the distal end of the posterior neck (30) to form a step (S) and extends in the distal direction. In this way, bone growth is promoted by increasing the surface area of ​​the aforementioned bone growth portion (11), while preventing the problem of limited joint range of motion of the implant due to interference between the posterior neck (30) and the acetabular cup, compared to the problem of limited range of motion of anatomical joints. Since the aforementioned bone growth portion (11) promotes natural bone growth, bone cement can be eliminated during the process of fixing the aforementioned main body portion (10) to the femur of an animal.

[0089] This bone growth portion (11) includes a porous portion (111) and a support portion (113).

[0090] The aforementioned porous portion (111) is a structure with multiple pores to promote bone growth, allowing the animal femoral implant (1) to be fixed to the femur by bone growth, thus preventing complications such as aseptic loosening that may occur when using bone cement, and bone resorption around the cement, without the use of bone cement. Preferably, the aforementioned porous portion (1) can be formed by 3D printing.

[0091] The aforementioned support portion (113) is a structure forming a solid surface, and preferably, it can be formed along the edge of the aforementioned bone growth portion (11). That is, the aforementioned support portion (113) is as follows: Figures 2 to 6 As shown, preferably, it is formed on all portions of the porous structure layers in the porous portion (111) where they intersect and form boundaries. The porous portion (111) is as follows... Figures 2 to 6 As shown, it is formed on the four sides of the main body (4). Therefore, the support portion (113) is formed on the edge where the surfaces intersect to protect the edge of the porous portion (111). The support portion (113) is constructed on the bone growth portion (11) so that the porous portion (111) with multiple gaps and relatively weak strength is protected by the support portion (113). Therefore, during the process of inserting the femoral implant (1) into the femur of an animal, it can prevent damage such as breakage or bending caused by friction or external force between the edge of the weak porous portion (111) and the bone, and block various inflammatory reactions caused by the infiltration of porous particles into blood vessels when the porous portion (111) is damaged.

[0092] The aforementioned porous portion (111) and the aforementioned support portion (113) can be manufactured by 3D printing. This makes it easier to manufacture femoral implants (1) for animals and provides customized implants suitable for various animals.

[0093] Reference Figure 7 As described, adjacent porous portions (111) and support portions (113) can be configured to have the same level. The same level means that the portion where the porous portion (111) intersects with the support portion (113) does not protrude to either side, such as... Figure 7 As shown, they form the same height. With this structure, the relatively weak porous portion (111) can be protected by the support portion (113), but when the main body portion (10) is inserted into the bone marrow cavity of an animal, the porous portion (111) can be in close contact with the inner wall of the bone to promote bone growth.

[0094] The aforementioned stem (13) is formed at the distal end of the main body (10) to facilitate insertion into the femur. When the main body (10) is inserted into the femoral medullary cavity of an animal, insertion of the main body (10) is easier, and the inserted stem (13) allows the main body (10) to be stably fixed within the femur. The stem (13) tapers from the distal end of the bone growth portion (11), forming a step, and extends distally. This facilitates insertion of the femoral implant (1) into the femoral medullary cavity of an animal. The aforementioned stem (13) is as follows: Figures 2 to 4 As shown, it can be constructed to form a solid surface, thereby reducing friction and increasing physical strength through a smooth plane. This aforementioned handle (13) can also be manufactured by 3D printing.

[0095] The aforementioned neck (30) is a structure connecting the aforementioned main body (10) and the subsequently described joint (50). The aforementioned neck (30) can prevent interference within a certain range, allowing the animal's anatomical joint movement to be restored. The aforementioned femoral implant (1) for animals can be configured such that the size of the aforementioned neck (30) varies with the size of the subsequently described joint (50).

[0096] Reference Figure 8 For example, when the cross-sectional area of ​​point A of the aforementioned joint (50) is 12.23 mm², the cross-sectional area of ​​point B of the aforementioned neck (30) is 9.75 mm²; when the cross-sectional area of ​​point A of the aforementioned joint (50) is 24.59 mm², the cross-sectional area of ​​point B of the aforementioned neck (30) is 19.97 mm²; when the cross-sectional area of ​​point A of the aforementioned joint (50) is 41.21 mm², the cross-sectional area of ​​point B of the aforementioned neck (30) is 33.61 mm².

[0097] That is, it can be seen that when the size of the joint (50) described later increases, the size of the neck (30) of the above-mentioned femoral implant (1) also increases, and when the size of the joint (50) described later decreases, the size of the neck (30) also decreases.

[0098] In humans, the body size of normal adults is similar, but in animals, there are small, medium and large animals, with significant differences in body size. The size of the artificial femoral head attached to the femoral implant (1) for animals will increase as the size of the animal changes from small to medium to large, and the size of the connecting part (50) will also increase accordingly. When the size of the connecting part (50) is relatively larger than the neck (30), the neck (30) becomes relatively thin and cannot withstand concentrated stress, and the neck (30) is also easily damaged.

[0099] The aforementioned connecting portion (50), which is a structure for attaching the artificial femoral head, can be formed extending from the proximal end of the aforementioned neck (30). The shape of the aforementioned connecting portion (50) is not limited to any particular shape, but preferably, it can have a truncated conical structure. This aforementioned connecting portion (50) can be machined to meet its attachment conditions with the artificial femoral head. That is, after the entire implant (1) is manufactured by 3D printing, the aforementioned connecting portion (50) can be machined separately.

[0100] Figure 9 The accompanying drawings are related to an animal femoral implant (1) according to an embodiment of the present invention. In this embodiment, a locking hole (115) is added to the bone growth portion (11). Therefore, to avoid repetition, the following description will focus only on the newly added locking hole (115).

[0101] The aforementioned locking hole (115) is a structure in which a locking bolt to prevent settlement is inserted, such as... Figure 9 As shown, it can be formed on the outer surface of the bone growth portion (11). Preferably, the locking hole (115) can be machined. The locking hole (115) is constructed on the bone growth portion (11) so that the locking bolt is fixed to the locking hole (115), thereby preventing the animal femoral implant (1) inserted into the animal femur from settling.

[0102] In addition, in the aforementioned bone growth portion (11), the aforementioned locking hole (115) should be formed on the outer surface of the aforementioned bone growth portion (11) so that the locking bolt can be inserted from the outer side of the femur to the inner side, thereby ensuring the surgeon's field of vision and surgical convenience when performing artificial hip replacement surgery on animals.

[0103] The aforementioned locking hole (115) can be configured such that the hole's central axis (A)H ) and the axis of the handle (A) S Vertical. This ensures that, in surgical situations where the surgeon's field of vision is extremely limited due to blood, bodily fluids, or remains, the surgeon can more easily fix the locking bolt to the aforementioned locking hole (115).

[0104] Figure 10 The accompanying drawings are of an animal femoral implant (1) according to another embodiment of the present invention. In this embodiment, the locking hole (115) formed on the bone growth portion (11) is formed at an angle. That is, as shown in the accompanying drawings... Figure 9 As shown, the locking hole (115) is characterized in that the central axis of the hole is not perpendicular to the axis of the handle. The central axis (A) of the locking hole (115) is... H ) not with the axis of the handle (A) S Vertical, such as Figure 10 As shown, it is constructed at a certain angle to more effectively prevent the implant inserted into the animal's femur from settling. Figure 10 In this case, the locking hole (115) is inclined toward the distal end, but the inclination direction of the locking hole (115) can also be configured to be inclined toward the opposite proximal end.

[0105] Figure 11 This is a diagram showing the usage state of the present invention, see reference. Figure 11 As described herein, the femoral implant for animals (1) is as follows: Figure 11 The image shows a prosthesis inserted into the medullary cavity of the femur (F) of an animal during an artificial hip replacement surgery. Artificial hip replacement surgery for animals can be achieved using the above-mentioned femoral implant (1). As described above, the above-mentioned femoral implant (1) for animals has a porous structure (111) and does not use bone cement, thus preventing various problems caused by bone cement.

[0106] Most importantly, this porous portion (111) is protected by a support portion (113) that forms a solid surface and has relatively strong strength. Therefore, during the insertion of the femoral implant (1) into the femur of an animal, damage problems such as breakage or bending caused by friction or external force between the edge of the porous portion (111) and the bone can be prevented. When the porous portion (111) is damaged, fine particles, namely porous particles, are generated that fall off the porous portion (111). These porous particles can seep into blood vessels and cause various inflammatory reactions. However, the present invention can prevent damage to the porous portion (111) at the source through the structure of the support portion (113), thus preventing problems caused by porous particles in advance.

[0107] The above detailed description is intended to illustrate the present invention. Furthermore, the foregoing description shows and describes preferred embodiments of the invention, which can also be used in various other combinations, modifications, and environments. That is, changes or modifications can be made within the scope of the inventive concept disclosed in this specification, and within the equivalent scope of the disclosure and / or within the scope of technology or knowledge in the art. The embodiments described are the optimal states for realizing the technical ideas of the present invention, and various changes can be made as needed in the specific application fields and uses of the invention. Therefore, the above detailed description of the present invention is only a disclosed implementation state and is not intended to limit the invention. In addition, it should be understood that the appended claims also include other implementation states.

Claims

1. A femoral implant for animals, characterized in that, include: The main body inserted into the animal femur, the connecting part that attaches to the artificial femoral head, and the neck connecting the main body and the connecting part. The main body includes a bone growth portion formed on the proximal end to promote bone growth and a stem portion formed on the distal end to facilitate insertion into the femur. The bone growth portion includes a porous portion with multiple pores to promote bone growth and a support portion with a solid surface to protect the porous portion. The porous portion is formed on all four sides of the main body, and the support portion is formed on the edges where the four sides of the main body intersect. The portions where the porous portion and the support portion intersect do not protrude to either side, forming the same height. Thus, the relatively weaker porous portion is protected by the support portion. At the same time, when the main body is inserted into the bone marrow cavity of an animal, the porous portion is in close contact with the inner wall of the bone. The bone growth portion protrudes from the stem portion through an edge that forms a step at the point where the bone growth portion meets the proximal end of the stem portion. The stem portion tapers from the distal end of the bone growth portion, forming a step, and extends in the distal direction. The bone growth portion expands from the distal end of the neck, forming a step, and extends in the distal direction.

2. The femoral implant for animals according to claim 1, characterized in that, The support structure is manufactured using 3D printing.

3. The femoral implant for animals according to claim 1, characterized in that, The size of the neck varies with the size of the joint.

4. The femoral implant for animals according to claim 3, characterized in that, When the size of the joint increases, the size of the neck also increases; when the size of the joint decreases, the size of the neck also decreases.

5. The femoral implant for animals according to claim 1, characterized in that, The bone growth region also includes a locking hole into which a locking bolt is inserted to prevent subsidence.

6. The femoral implant for animals according to claim 5, characterized in that, The locking hole is formed on the outer surface of the bone growth portion.

7. The femoral implant for animals according to claim 6, characterized in that, The central axis of the locking hole is perpendicular to the axis of the handle.

8. The femoral implant for animals according to claim 6, characterized in that, The central axis of the locking hole is not perpendicular to the axis of the handle.

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