A hip prosthesis

Abstract

The invention relates to a hip prosthesis. In particular, the invention relates to a hip prosthesis comprising two different regions for the femur and the acetabulum to be used instead of deformed bone tissues.

Description

[0001] A HIP PROSTHESIS

[0002] Technical Area

[0003] The invention relates to a hip prosthesis.

[0004] The invention particularly relates to a hip prosthesis comprising two different regions for the femur and acetabulum to be used instead of deformed bone tissues.

[0005] State of the Art

[0006] In the biomedical sector, the use of implants to replace deformed bone tissues has become a common practice. Hip prostheses are used in the treatment of hip joints damaged by age-related degenerative diseases, post-traumatic deformations, or congenital anomalies. In hip prostheses used today, the femoral component is placed in the femoral intramedullary canal and the mechanical loads from the acetabulum are transferred to the inner part of the femur. These prostheses aim to transfer mechanical loads correctly and provide load distribution over the femoral head and cortical bone. However, all current designs are based on similar principles in terms of implant placement and load transfer mechanisms.

[0007] There are various problems frequently encountered in current hip prosthesis designs. The most common of these problems are aseptic loosening, dislocation of the prosthesis, fracture of the prosthesis and disorders in load transfer. Problems in load transfer in particular cause undesirable mechanical stress accumulation in the bone tissue, which in time leads to fractures in the bone, loosening or dislocation of the prosthesis. The body load from the acetabulum is normally transferred to the femoral head and then to the cortical bone structure of the femur. However, this natural load transfer mechanism is disrupted in current hip prostheses. This disruption leads to improper stress distribution in the bone and causes the prosthesis to fail in the long term.

[0008] Mechanical problems such as aseptic loosening and stress shielding effect cause the prosthesis to lose its function and require revision surgeries. Revision surgeries are more complex, more challenging for the patient and have a higher risk of complications compared to the initial operations. In addition, bone loss is a serious problem in traditional hip prosthesis placement methods. When placing the prosthesis into the femur, the surgeon is forced to remove healthy bone tissue in order to ensure stability of the prosthesis. This situation prevents the patient's natural bone structure from being preserved and reduces the longevity of the prosthesis.

[0009] In conclusion, current hip prosthesis designs have significant challenges in fundamental issues such as load transfer, bone loss and prosthesis stability. These difficulties negatively affect the quality of life of patients and shorten the life of the prosthesis. The need for new and improved designs causes research and innovation in this field to continue rapidly.

[0010] As a result of the research conducted on the subject, the application titled “Hip Prosthesis Systems Used in Femoral Head and Acetabulum Bone Deformations” numbered TR 2020 / 12007 was encountered. The relevant application includes a proximal femoral body consisting of Ti6AI4V ELI (Grade 23) material with increased yield and elongation values, a special chemical roughening process and sandblasting to increase the adhesion of the prosthesis to the area driven into the bone, an anodic oxidation process as a result of the reactions formed on the electrodes in the electrolytic environment, and a stem (support nail) placed in the bone tissue to receive support from neighboring bone tissues so that the products can be implanted, which has an angle adjustment notch to be fixed at the desired angle, and a bipolar cup connecting the hip prosthesis system to the acetabulum joint cartilage in the bone, and an acetabulum connecting the total hip prosthesis system to the ilium bone.

[0011] As a result, due to the negativities described above and the inadequacy of existing solutions on the subject, it has become necessary to make a development in the relevant technical field.

[0012] Purpose of the Invention

[0013] The invention is inspired by the current situation and aims to solve the above-mentioned negativities.

[0014] This invention was developed to overcome the mechanical problems encountered in traditional hip prostheses used in the biomedical field and to make bone load transfer more efficient.

[0015] The main purpose of the invention is to present a new hip prosthesis design that minimizes these problems and optimizes load transfer. The invention provides natural load distribution between the femur and acetabulum, increasing the longevity of the prosthesis and reducing the need for revision surgeries.

[0016] Another purpose of the invention is to protect healthy bone tissue during the placement of the prosthesis and to increase the stability of the prosthesis.

[0017] There are two separate components for the hip prosthesis structure, the femur and the acetabulum, which are the subject of the invention. These components move on each other to form an artificial joint. Another purpose of the invention is to improve the performance of the prosthesis by increasing the compliance and stability of these movable components. Roughening the surfaces of these components that come into contact with the bone or producing them with indented-protruding structures accelerates the biological adhesion between the bone and the prosthesis and further increases the stability of the prosthesis.

[0018] The invention also provides an innovative mechanism that allows the components of the prosthesis to be connected to each other in the form of a screw connection. This mechanism allows the parts to be joined securely. This design facilitates the assembly and disassembly of the prosthesis, while also increasing the long-term stability of the prosthesis.

[0019] In conclusion, the aim of this invention is to provide a prosthesis design that minimizes mechanical problems encountered in traditional hip replacement designs, optimizes load transfer, and preserves healthy bone tissue. This innovative design improves patients' quality of life, accelerates the postoperative recovery process, and significantly reduces the risk of prosthesis failure.

[0020] It is a hip prosthesis that is used to create an artificial joint between the damaged area of the femoral head and the acetabulum by placing the femoral bones in the intramedullary region of the femur, starting from the hip joint and extending to the knee, in order to fulfill the purposes described above, comprising:

[0021] • a body that is inserted into the femoral intramedullary region of the femur bones from the upper side and has the form of a cylindrical hollow rod,

[0022] A head consisting of a shaft that will be placed inside the femoral head and a spherical surface that will cover the damaged area of the femoral head and is connected to the end of this shaft, in order to artificially replace the damaged area of the femoral head and fulfill the function of the femoral head,

[0023] • A head socket on the body into which the shaft is placed to ensure the connection of the head to the body,

[0024] • a fixing bar socket located on the shaft,

[0025] • In order to fix the body and the head to each other; a fixing bar is placed from the upper part of the body, passing through the fixing bar slot on the shaft passing through the head slot.

[0026] The structural and characteristic features of the invention and all its advantages will be understood more clearly thanks to the figures given below and the detailed explanation written by making references to these figures, and therefore the evaluation should be made by taking these figures and the detailed explanation into consideration.

[0027] Figures to Help Understand the Invention

[0028] Figure 1 a is a general view of the hip prosthesis.

[0029] Figure 1 b is a general view showing the internal structure of the hip prosthesis.

[0030] Figure 2 is a detailed view of the parts of the hip prosthesis.

[0031] Figure 3 is a view of a femur bone to which the hip prosthesis will be applied.

[0032] Figure 4 is a view of a femur bone to which the hip prosthesis has been applied.

[0033] Explanation of Part References

[0034] 10 Body

[0035] 1 1 Head Socket

[0036] 12 Recessed surface

[0037] 20 Head

[0038] 21 Shaft

[0039] 22 Spherical surface

[0040] 23 Fixation rod socket

[0041] 24 Rough surface

[0042] 30 Fixation rod

[0043] A Hip prosthesis 1 Femur bone

[0044] 2 Femur intramedullary region

[0045] 3 Femoral head

[0046] 4 Femoral head damaged region

[0047] 5 Direction of insertion

[0048] 6 Contact surface

[0049] Detailed Description of the Invention

[0050] In this detailed description, preferred embodiments of the hip prosthesis (A) which is the subject of the invention are explained only for a better understanding of the subject.

[0051] The hip prosthesis (A) which is the subject of the invention has been developed to be used by placing the femur (thigh) bones (1 ) starting from the hip joint and extending to the knee, into the femur intramedullary region (2), in the direction of insertion (5). With the invention, an artificial joint is created between the damaged area of the femoral head (4) located on the femoral head (3) and the acetabulum.

[0052] The hip prosthesis (A), which is the subject of the invention, basically consists of a body (10), a head (20) and a fixation rod (30). The body (10) has the form of a cylindrical rod and is inserted into the femoral intramedullary region (2) of the femur bones (1 ) from the upper side.

[0053] The head (20) is the part that is placed to fit the femoral head (3). The head (20) basically consists of a shaft (21 ) and a spherical surface (22) connected to the end of this shaft

[0054] (21 ). The shaft (21 ) will be placed inside the femoral head (3) and the spherical surface

[0055] (22) will cover the damaged area of the femoral head (4). The inside of the spherical surface (22) can be empty or full. The head (20) artificially replaces the damaged area of the femoral head (4) and fulfills the function of the femoral head (3).

[0056] The shaft (21 ) in the head (20) is passed through a head socket (1 1 ) in the body (10) to connect the head (20) to the body (10). The said head socket (1 1 ) has an inclined structure, so the head (20) is positioned at an angle on the body (10) and fits the femur bone (1 ) and the femur head (3).

[0057] In the hip prosthesis (A) which is the subject of the invention, the inner part of the body (10) is empty, and a fixation bar (30) is placed in this empty part. There is a fixation bar socket (23) on the shaft (21 ) located in the head (20). After the shaft (21 ) of the head (20) is placed in the head socket (11) located in the body (10), the fixation bar (30) is placed from the upper part of the body (10) and passed through the fixation bar socket (23) located on the shaft (21). Thus, the body (10) and the head (20) are fixed to each other. In a preferred embodiment of the invention, there are teeth on the fixing bar (30) and grooves in the inner parts of the fixing bar housing (23). Thus, the fixing bar (30) can be tightened like a screw and a durable assembly can be obtained.

[0058] In a preferred embodiment of the invention, the parts close to the lower end of the outer surface of the body (10) comprise recessed surfaces (12). Said recessed surfaces (12) ensure that the attachment of the body (10) to the femur bone (1 ) is increased.

[0059] In a preferred embodiment of the invention, the outer surfaces of the shaft (21) located in the head (20) include rough surfaces (24). Said rough surfaces (24) ensure that the attachment of the head (20) to the femoral head (3) is increased.

Claims

CLAIMS1. A hip prosthesis (A) used by placing the femur bones (1 ) starting from the hip joint and extending to the knee into the intramedullary region (2) of the femur, to create an artificial joint between the damaged area of the femoral head (4) located in the femoral head (3) and the acetabulum, characterized by comprising:• a body (10) having the form of a cylindrical hollow rod which is inserted from the upper side into the femoral intramedullary region (2) of the femur bones (1 ),• a cap (20) comprising a shaft (21 ) that will be placed inside the femoral head (3) and a spherical surface (22) that will cover the damaged area of the femoral head (4) connected to the end of this shaft (21 ) in order to artificially replace the damaged area of the femoral head (4) and fulfill the function of the femoral head (3),• a head socket (11 ) on the body (10) into which the shaft (21 ) is placed to ensure the connection of the head (20) to the body (10),• a fixing bar socket (23) located on the shaft (21 ),• in order to fix the body (10) and the head (20) to each other; a fixing bar (30) is placed in such a way that it passes through the fixing bar slot (23) on the shaft (21 ) passing through the head slot (1 1 ) from the upper part of the body (10).

2. The hip prosthesis (A) according to claim 1 , characterized in that the head housing (1 1 ) has an inclined structure to ensure that the head (20) is positioned at an angle on the body (10).

3. The hip prosthesis (A) according to claim 1 or 2, characterized by comprising thread on the fixation bar (30) and grooves on the inner parts of the fixation bar housing (23) to ensure that a durable assembly can be achieved by tightening the fixation bar (30) like a screw.

4. The hip prosthesis (A) according to any of the previous requests, characterized in that the parts of the body (10) close to the lower end of the outer surface of the body (10) include recessed surfaces (12) in order to increase the attachment of the body (10) to the femur bone (1 ).

5. The hip prosthesis (A) according to any of the preceding claims, characterized in that the outer surfaces of the shaft (21) located in the head (20) include rough surfaces (24) in order to increase the attachment of the head (20) to the femoral head (3).

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