CN110464512A - A kind of hip prosthesis - Google Patents

Abstract

The invention belongs to the technical field of artificial bone, in particular to a hip joint prosthesis. The invention provides a hip joint prosthesis, comprising: a femoral stem, a ball head, an inner liner, an acetabular cup and connecting screws, the femoral stem is inserted into the bone marrow of the tibia at the site to be implanted, and the acetabular cup passes through the The connecting screw is connected with the acetabular socket of the site to be implanted, and the femoral stem is connected with the acetabular cup through the ball head and inner liner; the inner curvature of the femoral stem is 127°-135°. In the technical solution provided by the present invention, through the cooperation of various parts of the hip joint prosthesis, the connection between the implanted hip joint prosthesis and the native bone can be stabilized; at the same time, the inner curvature of the femoral stem is set at 127°-135°, which can be combined with The bone marrow of the tibia at the implanted site fits better, is easy to fix and is not easy to loosen after fixation; it solves the technical defect that the implanted hip joint prosthesis is prone to loosening with the native bone in the prior art and needs to be replaced regularly.

Description

a hip prosthesis

technical field

The invention belongs to the technical field of artificial bone, in particular to a hip joint prosthesis.

Background technique

In recent years, artificial joint replacement is one of the most important advances in the field of orthopedics. With the continuous updating of medical device technology in my country, especially in the field of orthopedics, artificial hip replacement has become a medical treatment for disabling diseases of the hip. It is an effective method generally used, and the fixation effect between the implanted acetabulum and the femoral stem and the natural bone is the key to determine the service life and efficacy of the artificial joint.

In the prior art, it is difficult or unstable to fix the femoral stem and the femur, and loosening between the femoral stem and the bone is easy to occur, resulting in a high replacement rate of the femoral stem, increased treatment costs, frequent replacement of artificial bone parts, and harm to the patient. cause greater physical pain.

Therefore, a hip joint prosthesis has been developed to solve the technical defects that in the prior art, the implanted hip joint prosthesis is prone to loosening with the original bone and needs to be replaced regularly, which has become an urgent need for those skilled in the art. solved problem.

Contents of the invention

In view of this, the present invention provides a hip joint prosthesis, which is used to solve the technical defect in the prior art that the implanted hip joint prosthesis is prone to loosening with the original bone and needs to be replaced periodically.

The present invention provides a hip joint prosthesis, which comprises: a femoral stem, a ball head, an inner liner, an acetabular cup and connecting screws, the femoral stem is inserted into the bone marrow of the tibia to be implanted, the The acetabular cup is connected to the acetabular socket of the site to be implanted through the connecting screw, and the femoral stem is connected to the acetabular cup through the ball head and inner liner;

The inner curvature of the femoral stem is 127°-135°.

Preferably, the end of the femoral stem close to the ball head is provided with several fan-shaped transverse grooves.

Preferably, the fan-shaped transverse groove has a width of 1-20mm.

Preferably, the distance between adjacent fan-shaped transverse grooves is 1-20 mm, and the number of fan-shaped transverse grooves is 1-15.

Preferably, several vertical grooves are provided at the end of the femoral stem inserted into the bone marrow of the tibia at the site to be implanted.

Preferably, the width of the vertical groove is 1-20mm.

Preferably, the distance between adjacent vertical grooves is 1-20 mm, and the number of vertical grooves is 1-15.

Preferably, the end of the femoral stem inserted into the bone marrow of the tibia at the site to be implanted has a tapered structure with a narrow bottom and a wide top.

Preferably, the surface of the acetabular cup is provided with a vacuum titanium layer, the thickness of the vacuum titanium layer is 400±200 μm, and the porosity of the vacuum titanium layer is greater than 50%.

Preferably, the connection between the acetabular cup and the inner liner is a zigzag locking structure.

In summary, the present invention provides a hip joint prosthesis, including: a femoral stem, a ball head, an inner liner, an acetabular cup, and connecting screws. The femoral stem is inserted into the bone marrow of the tibia to be implanted, and the hip The acetabular cup is connected to the acetabular socket of the site to be implanted through the connecting screw, and the femoral stem is connected to the acetabular cup through the ball head and inner liner; the inner curvature of the femoral stem is 127°-135° °. In the technical solution provided by the present invention, through the cooperation of various parts of the hip joint prosthesis, the connection between the implanted hip joint prosthesis and the native bone can be stabilized; at the same time, the inner curvature of the femoral stem is set at 127°-135°, which can be combined with The bone marrow of the tibia at the site to be implanted fits better, which is easy to fix and less prone to loosening after fixation. The hip joint prosthesis provided by the present invention solves the technical defect in the prior art that the implanted hip joint prosthesis is prone to loosening with the native bone and requires regular replacement.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is an exploded schematic diagram of a hip joint prosthesis in an embodiment of the present invention;

Fig. 2 is a partially enlarged schematic diagram of a femoral stem provided with several fan-shaped transverse grooves in a hip joint prosthesis provided by an embodiment of the present invention;

Fig. 3 is a partially enlarged schematic diagram of a femoral stem provided with several vertical grooves in a hip joint prosthesis provided by an embodiment of the present invention;

Fig. 4 is a partially enlarged schematic diagram of a femoral stem inserted into the bone marrow of the tibia to be implanted in a hip joint prosthesis provided by an embodiment of the present invention;

Fig. 5 is a schematic cross-sectional view of the joint between the acetabular cup and the inner liner in a hip joint prosthesis provided by an embodiment of the present invention;

Wherein, the femoral stem 1, the ball head 2, the lining 3, the acetabular cup 4 and the connecting screw 5.

Detailed ways

The embodiment of the present invention provides a hip joint prosthesis, which is used to solve the technical defect in the prior art that the implanted hip joint prosthesis is prone to loosening with the original bone and needs to be replaced periodically.

In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following description The embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Fig. 1 to Fig. 5, the present invention provides a kind of hip prosthesis, including: femoral stem 1, ball head 2, liner 3, acetabular cup 4 and connecting screw 5, femoral stem 1 is inserted into the site to be implanted In the bone marrow of the tibia, the acetabular cup 4 is connected to the acetabular socket of the site to be implanted through the connecting screw 5, and the femoral stem 1 is connected to the acetabular cup 4 through the ball head 2 and the inner lining 3; the inner curvature of the femoral stem 1 is 127° ~135°. The embodiment of the present invention provides a hip joint prosthesis, which is used to solve the technical defect in the prior art that the implanted hip joint prosthesis is prone to loosening with the original bone and needs to be replaced periodically.

In the technical solution provided by the present invention, one end of the femoral stem 1 is inserted into the bone marrow of the tibia at the site to be implanted, the other end of the femoral stem 1 is mated and connected with the ball head 2, and the ball head 2 is inserted into the inner liner 3, and further passed through the inner liner 3 Inserted into the acetabular cup 4, the connecting screw 5 connects the acetabular cup 4 to the acetabular fossa of the site to be implanted, so that the implanted hip joint prosthesis can be tightly connected and fixed to the site to be implanted. At the same time, the matching between the femoral stem 1 and the physiological curvature of the human body is effectively improved, and the inner curvature of the femoral stem 1 is 127°-135°.

Please refer to FIG. 2 here. In a hip joint prosthesis provided by an embodiment of the present invention, the end of the femoral stem 1 near the ball head 2 is provided with several fan-shaped transverse grooves. Compared with the smooth outer surface, the fan-shaped transverse groove can increase the friction between the femoral stem 1 and the implant environment, prevent the femoral stem 1 from sinking and shifting after implantation, and effectively ensure the implanted hip prosthesis No loose shifting occurs.

In order to make the friction force of the fan-shaped transverse groove large enough to prevent the femoral stem 1 from subsidence, and at the same time, take into account that the implanted hip joint prosthesis can cooperate with the overall movement of the joint, in the technical solution provided by the embodiment of the present invention, the fan-shaped transverse groove The width is 1-20mm.

Similarly, in the hip joint prosthesis provided by the embodiment of the present invention, the distance between adjacent fan-shaped transverse grooves in the femoral stem 1 is 1-20 mm, and the number of fan-shaped transverse grooves is 1-15.

Please refer to Fig. 3 here, similarly, when the femoral stem 1 is inserted into the bone marrow of the tibia to be implanted, in order to prevent the displacement caused by the rotation of the femoral stem 1, in the technical solution provided by the embodiment of the present invention, the femoral stem 1 is inserted There are several vertical grooves at one end of the tibial bone marrow at the implantation site. Compared with the smooth outer surface, the vertical groove can increase the friction between the femoral stem 1 and tibial bone marrow, and prevent the femoral stem 1 from rotating.

In order to provide enough frictional force for the femoral stem 1 to prevent the femoral stem 1 from rotating, and at the same time, take into account that the implanted femoral stem 1 can cooperate with the overall movement of the joint, in the technical solution provided by the embodiment of the present invention, the width of the vertical groove is 1-20mm.

Similarly, in the hip joint prosthesis provided by the embodiment of the present invention, the distance between adjacent vertical grooves is 1-20 mm, and the number of vertical grooves is 1-15.

Please refer to Fig. 4 further here. In order to facilitate the surgical operation, the femoral stem 1 can be more conveniently inserted into the site to be implanted. A tapered structure with a narrow bottom and a wide top.

In order to facilitate the growth of new bone into the implanted hip prosthesis, the implanted hip prosthesis can better integrate with the autogenous bone, and at the same time, the surface of the acetabular cup 4 of the implanted hip prosthesis It is not absorbed and degraded by the human body, and loses the corresponding function of the acetabular cup 4. In a hip joint prosthesis provided by the embodiment of the present invention, the surface of the acetabular cup 4 is provided with a vacuum titanium layer, and the thickness of the vacuum titanium layer is 400±200 μm , the porosity of the vacuum titanium layer is greater than 50%.

Please refer to FIG. 5 here. In order to stabilize the connection of the acetabular cup 4 and prevent the internal structure of the implanted hip prosthesis from loosening, in the technical solution provided by the embodiment of the present invention, the acetabular cup 4 and the inner liner 3 The joint is a zigzag locking structure.

In summary, the present invention provides a hip joint prosthesis, including: a femoral stem, a ball head, an inner liner, an acetabular cup, and connecting screws. The femoral stem is inserted into the bone marrow of the tibia to be implanted, and the hip The acetabular cup is connected to the acetabular socket of the site to be implanted through the connecting screw, and the femoral stem is connected to the acetabular cup through the ball head and inner liner; the inner curvature of the femoral stem is 127°-135° °. In the technical solution provided by the present invention, through the cooperation of various parts of the hip joint prosthesis, the connection between the implanted hip joint prosthesis and the native bone can be stabilized; at the same time, the inner curvature of the femoral stem is set at 127°-135°, which can be combined with The bone marrow of the tibia at the site to be implanted fits better, which is easy to fix and less prone to loosening after fixation. The hip joint prosthesis provided by the present invention solves the technical defect in the prior art that the implanted hip joint prosthesis is prone to loosening with the native bone and requires regular replacement.

A hip joint prosthesis provided by the present invention has been introduced in detail above. For those of ordinary skill in the art, according to the idea of the embodiment of the present invention, there will be changes in the specific implementation and application range. In summary As stated above, the content of this specification should not be construed as limiting the present invention.

Claims (10)

1. a hip joint prosthesis, is characterized in that, described hip joint prosthesis comprises: femoral stem, ball head, liner, acetabular cup and connecting screw, described femoral stem is inserted in the position tibial bone marrow to be implanted, The acetabular cup is connected to the acetabular socket of the site to be implanted through the connecting screw, and the femoral stem is connected to the acetabular cup through the ball head and inner liner; The inner curvature of the femoral stem is 127°-135°. 2. The hip joint prosthesis according to claim 1, wherein the end of the femoral stem close to the ball head is provided with several fan-shaped transverse grooves. 3. The hip joint prosthesis according to claim 2, wherein the width of the fan-shaped transverse groove is 1-20 mm. 4. The hip joint prosthesis according to claim 2 or 3, wherein the distance between adjacent said sector-shaped transverse grooves is 1-20 mm, and the number of said sector-shaped transverse grooves is 1-15. 5 . The hip joint prosthesis according to claim 1 , wherein a plurality of vertical grooves are provided at one end of the femoral stem inserted into the bone marrow of the tibia at the site to be implanted. 6 . 6. The hip joint prosthesis according to claim 5, wherein the width of the vertical groove is 1-20mm. 7. The hip joint prosthesis according to claim 5 or 6, wherein the distance between adjacent vertical grooves is 1-20 mm, and the number of vertical grooves is 1-15. 8 . The hip joint prosthesis according to claim 1 , wherein the end of the femoral stem inserted into the bone marrow of the tibia at the site to be implanted has a tapered structure with a narrow bottom and a wide top. 9. The hip joint prosthesis according to claim 1, wherein the surface of the acetabular cup is provided with a vacuum titanium layer, the thickness of the vacuum titanium layer is 400±200 μm, and the pores of the vacuum titanium layer rate greater than 50%. 10. The hip joint prosthesis according to claim 1, characterized in that, the joint between the acetabular cup and the inner liner is a zigzag locking structure.