A customizable shoulder joint prosthesis using 3D printing and a preparation method thereof

Abstract

The present invention provides a customizable shoulder joint prosthesis using 3D printing and a preparation method thereof, which belongs to the field of medical equipment technology. It comprises an anti-shoulder humeral body, a glenoid liner is fixedly installed on the top of the anti-shoulder humeral body, one end of the glenoid liner contacts a glenosphere head, one end of the glenosphere head is fixedly installed with a metal glenoid back plate, and one end of the metal glenoid back plate is threadedly connected with a metal glenoid back plate fixing screw; there is an adjustment component, and the bottom end of the anti-shoulder humeral body is provided with an adjustment component, and the adjustment component is used to adjust according to the actual situation of the inner wall of the humerus of the patient. By arranging an adjustment component and a replacement component, the present invention can improve the adaptability of the shoulder joint prosthesis to the humeral bone cavity of different patients when implanted, reduce the installation error of the shoulder joint prosthesis when implanted in different patients, and further improve the flexibility of the support plate when implanted and installed by setting an adjustment component and a replacement component according to the patient's bone condition and actual needs.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a customizable shoulder joint prosthesis using 3D printing and a preparation method thereof. Background Art

[0002] Due to disease or trauma, a patient may need to undergo a total shoulder replacement surgery. In a total shoulder replacement surgery, a humeral prosthesis is used to replace the natural head of the patient's humerus. The humeral prosthesis generally includes an elongated column component implanted into the medullary cavity of the patient's humerus and a hemispherical prosthetic head component fixed to the column component. In such a total shoulder replacement surgery, the natural glenoid surface of the scapula is resurfaced or otherwise replaced using a glenoid component that provides a load-bearing surface.

[0003] When existing shoulder joint prostheses are implanted, the structural dimensions of the shoulder joint prostheses are generally standard dimensions. However, during actual implantation, the injuries of the shoulder joints of different patients are inconsistent. There are size errors when using standard-sized shoulder joint prostheses for implantation surgery, and it is difficult to adapt to the shoulder joint implantation conditions of different patients. At the same time, existing shoulder joint prostheses generally adopt the method of implanting a prosthetic humeral stem in the patient's humeral bone cavity. The thickness of the inner part of the humeral bone cavity of the shoulder joint of different patients varies. When a standard-sized prosthetic humeral stem is used for implantation, the degree of contact between the prosthetic humeral stem and the inner wall of the humeral bone cavity of different patients varies. Therefore, the present application provides a customizable shoulder joint prosthesis using 3D printing and a preparation method thereof to meet the needs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a customizable shoulder joint prosthesis using 3D printing to solve the problem that when the existing shoulder joint prosthesis is implanted, the structural dimensions of the shoulder joint prosthesis are generally standard sizes, but when actually used for implantation, the injuries of the shoulder joints of different patients are inconsistent. There are size errors when using a standard-sized shoulder joint prosthesis for implantation surgery, and it is difficult to adapt to the shoulder joint implantation conditions of different patients. At the same time, the existing shoulder joint prosthesis generally adopts the method of implanting a prosthetic humeral stem in the patient's humeral bone cavity, and the thickness of the inner part of the humeral bone cavity of the shoulder joint of different patients is different. When a standard-sized prosthetic humeral stem is used for implantation, there is a problem that the degree of contact between the prosthetic humeral stem and the inner wall of the humeral bone cavity of different patients is different.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A customizable shoulder joint prosthesis using 3D printing, comprising an anti-scapulohumeral body, a glenoid liner fixedly installed on the top of the anti-scapulohumeral body, one end of the glenoid liner contacts with a glenosphere head, one end of the glenosphere head is fixedly installed with a metal glenoid back plate, one end of the metal glenoid back plate is threadedly connected with a metal glenoid back plate fixing screw; an adjustment component, an adjustment component is provided at the bottom end of the anti-scapulohumeral body, and the adjustment component is used to adjust according to the actual situation of the patient's humeral inner wall; a fixing component, a fixing component is provided on the inner wall of the adjustment component, and the fixing component is used to preliminarily fix the adjustment component; a replacement component, a replacement component is provided on one side of the adjustment component, and the replacement component is used to support the patient's humeral inner wall and can be replaced according to the patient's needs.

[0007] As a further improvement of the above technical solution:

[0008] Optionally, the adjustment component includes a base plate, which is fixedly mounted on the bottom end of the humeral body, and a positioning column is installed at an equal angle on one edge of the base plate. A connecting rod is connected to the bottom end of the base plate, and the number of base plates is set to multiple groups. The multiple groups of base plates are movably connected through multiple groups of connecting rods. A positioning mold is provided on the side of the base plate, and the material of the positioning mold is polylactic acid resin.

[0009] Optionally, a mounting cavity is provided through the top of the substrate, the number of the mounting cavities is set to four groups, the four groups of mounting cavities are arranged at equal angles on the top of the substrate, and the mounting angles between the four groups of mounting cavities are set to degrees.

[0010] Optionally, a sponge column is fixedly mounted on the bottom end of the mounting cavity, and the bottom end of the sponge column is in contact with the top end of another group of base plates.

[0011] Optionally, the fixing component includes a liquid capsule, which is installed on the inner wall of the installation cavity, and a positioning frame is installed at the bottom of the liquid capsule. The side of the positioning frame is fixedly connected to the inner wall of the installation cavity, and the number of the positioning frames is set to two groups, and the two groups of positioning frames are respectively installed at the bottom and top of the liquid capsule.

[0012] Optionally, the center of the bottom end of the liquid sac is in contact with a guide column, the top of the guide column is a conical structure, the outer surface of the guide column is provided with through holes, the through holes are arranged in an array on the outer surface of the guide column, the outer surface of the guide column is provided with cutting edges arranged at equal angles, and the cross-section of the cutting edge is set to be a triangle.

[0013] Optionally, a connecting rod is rotatably installed on one side of the bottom end of the guide column, and the number of the connecting rods is set to two groups. The two groups of connecting rods are relatively arranged on both sides of the bottom end of the guide column, and a pin is sleeved at the center of the bottom end of the two groups of connecting rods. The bottom end of the pin is fixedly connected to the bottom end of the inner wall of the sponge column.

[0014] Optionally, the replacement component includes a mounting base, a positioning hole fixedly installed at one end of the mounting base, the inner wall of the positioning hole is in contact with the outer surface of the positioning column, and a screw hole is installed at the other end of the mounting base, and a fixing stud is threadedly connected to the inner wall of the screw hole, and the fixing studs are threadedly connected to the inner wall of the screw hole and the threaded hole on one side of the substrate.

[0015] Optionally, an arc track is fixedly installed at one end of the mounting base, and the number of the arc tracks is set to two groups. The two groups of arc tracks are installed in parallel on one end of the mounting base, and a support plate is sleeved on the outer surface of the arc track. The top and bottom ends of the support plate are provided with arc grooves, and the top of the support plate is threadedly connected to the top of the mounting base by screws.

[0016] The present application also provides a method for preparing a customizable shoulder joint prosthesis using 3D printing, the steps of which are as follows:

[0017] S1. Using a dedicated scanning device to collect model point cloud data of the patient's shoulder joint, and creating a three-dimensional model of the patient's shoulder joint based on the obtained model point cloud data;

[0018] S2. Using the obtained three-dimensional shoulder joint model, a 3D printing device is used to print a proportional three-dimensional verification model of the patient's shoulder joint, and the patient's shoulder joint is measured and analyzed;

[0019] S3. After the structural support topology optimization is performed on the patient's proportional shoulder joint three-dimensional verification model, the finished product is 3D printed, and the surface of the shoulder joint prosthesis product obtained by 3D printing is smoothed;

[0020] S4. Prepare an optimized three-dimensional model of the shoulder joint prosthesis based on 3D printing technology to obtain a customized shoulder joint prosthesis based on the patient's three-dimensional model of the shoulder joint.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] In the above scheme, by setting an adjustment component, utilizing the connection and cooperation between multiple groups of substrates and multiple groups of connecting rods, and utilizing the plasticity of polylactic acid resin, and utilizing the preliminary positioning effect of the positioning mold on the inner wall of the patient's humeral bone cavity, the multiple groups of substrates are adaptively adjusted when the substrates are inserted into the cavity of the positioning mold, so that the multiple groups of substrates can conform to the conditions of the inner wall of the humeral bone cavity of different patients, and at the same time cooperate with the effect of replacing components to improve the adaptability of the shoulder joint prosthesis to the humeral bone cavity of different patients when implanted. Medical staff can flexibly add or reduce multiple groups of substrates according to the model data of the patient's shoulder joint collected by special scanning equipment, thereby further improving the flexibility of the shoulder joint prosthesis during implantation and installation, and reducing the installation error of the shoulder joint prosthesis when implanted in different patients.

[0023] By setting a fixing component and utilizing the linkage between the liquid sac and the guide column, when multiple groups of substrates are adaptively adjusted, the medical glue in the liquid sac is punctured by the guide column. By utilizing the porous and easy adsorption characteristics of the sponge column, when multiple groups of substrates are adaptively adjusted, the medical glue has a hysteresis when solidifying. After the adaptive adjustment of multiple groups of substrates, the multiple groups of substrates are preliminarily fixed to ensure the installation accuracy of the substrates when they are subsequently installed in conjunction with replacement components.

[0024] By replacing components and utilizing the coordination between the arc track and the support plate, as well as the adaptive adjustment effect of the adjustment components, the installation accuracy of the baseplate can be ensured while the support plate can further ensure the installation stability of the shoulder prosthesis and the inner wall of the humeral bone cavity of different patients. This ensures the stability of the shoulder prosthesis during implantation while adapting to the humeral bone cavity of different patients, reduces errors during installation of the shoulder prosthesis, and avoids shoulder surgery failure. At the same time, medical staff can replace support plates of different materials according to the patient's bone condition and actual needs, so as to further improve the flexibility of the support plate during implantation and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of a customizable shoulder joint prosthesis using 3D printing;

[0027] Figure 2 This is a schematic diagram of the cross-sectional structure of a customizable shoulder prosthesis using 3D printing;

[0028] Figure 3 It is a schematic diagram of the structure of the adjustment component;

[0029] Figure 4 It is a schematic diagram of the fixed component structure;

[0030] Figure 5 It is a schematic diagram of the structure of some components of the fixed component;

[0031] Figure 6 for Figure 5 A is an enlarged schematic diagram;

[0032] Figure 7 for Figure 5 A magnified schematic diagram of B;

[0033] Figure 8 Structural diagram of replacement components;

[0034] Fig. 9 Exploded view of the replacement assembly.

[0035] [Reference Signs]

[0036] 1. Anti-shoulder humeral body; 2. Glenoid liner; 3. Glenoid head; 4. Metal glenoid back plate; 5. Metal glenoid back plate fixing screws; 6. Adjustment assembly; 61. Base plate; 610. Positioning column; 62. Connecting rod; 63. Positioning mold; 64. Mounting cavity; 65. Sponge column; 7. Fixing assembly; 71. Liquid sac; 72. Positioning frame; 73. Guide column; 74. Through hole; 75. Cutting edge; 76. Connecting rod; 77. Pin; 8. Replacement assembly; 81. Mounting base; 82. Positioning hole; 83. Screw hole; 84. Fixing stud; 85. Arc track; 86. Support plate; 87. Arc groove.

[0037] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0038] The following is a detailed description of a customizable shoulder joint prosthesis using 3D printing provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0039] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0040] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0041] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0042] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0043] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a customizable shoulder joint prosthesis using 3D printing, including an anti-shoulder humeral body 1, a glenoid liner 2 is fixedly installed on the top of the anti-shoulder humeral body 1, one end of the glenoid liner 2 contacts a glenosphere head 3, one end of the glenosphere head 3 is fixedly installed with a metal glenoid back plate 4, and one end of the metal glenoid back plate 4 is threadedly connected with a metal glenoid back plate fixing screw 5; an adjustment component 6, an adjustment component 6 is provided at the bottom end of the anti-shoulder humeral body 1, and the adjustment component 6 is used to adjust according to the actual situation of the patient's humeral inner wall; a fixing component 7, a fixing component 7 is provided on the inner wall of the adjustment component 6, and the fixing component 7 is used to preliminarily fix the adjustment component 6; a replacement component 8, a replacement component 8 is provided on one side of the adjustment component 6, and the replacement component 8 is used to support the patient's humeral inner wall and can be replaced according to the patient's needs.

[0044] By setting the adjustment component 6, the multiple groups of substrates 61 can be adapted to the conditions of the inner wall of the humeral bone cavity of different patients, and at the same time cooperate with the effect of the replacement component 8 to improve the adaptability of the shoulder joint prosthesis to the humeral bone cavity of different patients when implanted. Medical staff can flexibly increase or decrease the multiple groups of substrates 61 according to the collected model data of the patient's shoulder joint, further improve the flexibility of the shoulder joint prosthesis during implantation and installation, and reduce the installation error of the shoulder joint prosthesis when implanted in different patients. By setting the fixing component 7, the multiple groups of substrates 61 are initially fixed after the adaptive adjustment of the multiple groups of substrates 61 by utilizing the hysteresis of medical glue during solidification, so as to ensure the installation accuracy of the substrates 61 when they are subsequently installed in cooperation with the replacement component 8. By setting the replacement component 8, the stability of the shoulder joint prosthesis during implantation is guaranteed while adapting to the humeral bone cavity of different patients, the error during installation of the shoulder joint prosthesis is reduced, and the failure of the patient's shoulder joint surgery is avoided. At the same time, medical staff can replace the support plate 86 of different materials according to the patient's bone condition and actual needs, so as to further improve the flexibility of the support plate 86 during implantation and installation.

[0045] like Figure 3 As shown, the adjustment component 6 includes a base plate 61, which is fixedly mounted on the bottom end of the humeral body 1, and a positioning column 610 is installed at an equal angle on one side edge of the base plate 61. A connecting rod 62 is connected to the bottom end of the base plate 61. The number of base plates 61 is set to multiple groups, and the multiple groups of base plates 61 are movably connected through the multiple groups of connecting rods 62. A positioning mold 63 is sleeved on the side of the base plate 61, and the material of the positioning mold 63 is polylactic acid resin. An installation cavity 64 is set through the top of the base plate 61, and the number of the installation cavity 64 is set to four groups. The four groups of installation cavities 64 are arranged at equal angles at the top of the base plate 61, and the installation angles between the four groups of installation cavities 64 are set to 90 degrees. A sponge column 65 is fixedly installed on the bottom end of the installation cavity 64, and the bottom end of the sponge column 65 contacts the top of another group of base plates 61.

[0046] Medical staff continuously connect multiple groups of substrates 61 through connecting rods 62 on the substrate 61 at the bottom end of the anti-scapulohumeral body 1, so that the sponge columns 65 on the upper group of substrates 61 are in contact with the mounting cavities 64 on the lower group of substrates 61 and are kept on the same axis. At this time, a single substrate 61 is in a horizontal state and multiple groups of substrates 61 are parallel to each other.

[0047] Then the medical staff inserts the positioning mold 63 into the patient's humeral bone cavity. The positioning mold 63 contacts the inner wall of the humeral bone cavity during the insertion process. Since the polylactic acid resin has a certain plasticity, the positioning mold 63 contacts the inner wall of the humeral bone cavity during the insertion process and deforms, so that the overall shape of the positioning mold 63 after deformation when contacting the inner wall of the humeral bone cavity during the insertion process is consistent with the inner wall of the patient's humeral bone cavity. At the same time, the polylactic acid resin has good biocompatibility, and when inserted into the patient's shoulder joint humeral bone cavity, it avoids irritating the patient's humerus. Then the medical staff inserts the multiple connected substrates 61 into the cavity of the positioning mold 63. The substrates When 61 enters the cavity of the positioning mold 63, under the insertion force of the medical staff, the substrate 61 is displaced against the inner wall of the cavity of the positioning mold 63, so that the substrate 61 is out of the horizontal state and the substrate 61 is offset to one side with the connecting rod 62 as the central axis. In this process, the multiple groups of substrates 61 are adhered and fixed by the fixing component 7. After the multiple groups of substrates 61 are fixed and formed, the positioning mold 63 together with the multiple groups of substrates 61 are pulled out from the patient's shoulder joint humeral bone cavity, and the positioning mold 63 on the multiple groups of substrates 61 are demolded and removed, and the subsequent support plate 86 is installed. After the support plate 86 is installed, it is inserted into the patient's shoulder joint humeral bone cavity.

[0048] By setting up connections and cooperation between multiple groups of substrates 61 and multiple groups of connecting rods 62, and utilizing the plasticity of polylactic acid resin and the preliminary positioning effect of the positioning mold 63 on the inner wall of the patient's humeral bone cavity, the multiple groups of substrates 61 are adaptively adjusted when the substrates 61 are inserted into the cavity of the positioning mold 63, so that the multiple groups of substrates 61 can conform to the conditions of the inner wall of the humeral bone cavity of different patients, and at the same time cooperate with the effect of the replacement component 8 to improve the adaptability of the shoulder joint prosthesis to the humeral bone cavity of different patients when implanted. Medical staff can flexibly increase or decrease multiple groups of substrates 61 according to the model data of the patient's shoulder joint collected by special scanning equipment, thereby further improving the flexibility of the shoulder joint prosthesis during implantation and installation, and reducing the installation error of the shoulder joint prosthesis when implanted in different patients.

[0049] like Figures 4 to 7As shown, the fixing assembly 7 includes a liquid capsule 71, which is mounted on the inner wall of the mounting cavity 64, and a positioning frame 72 is mounted on the bottom end of the liquid capsule 71. The side of the positioning frame 72 is fixedly connected to the inner wall of the mounting cavity 64. The number of positioning frames 72 is set to two groups, and the two groups of positioning frames 72 are respectively mounted on the bottom and top ends of the liquid capsule 71. The center of the bottom end of the liquid capsule 71 contacts with a guide column 73, and the top end of the guide column 73 is a conical structure. The outer surface of the guide column 73 is penetrated by a through hole 74, and the through holes 74 are arranged in an array on the outer surface of the guide column 73. Cutting edges 75 are arranged at equal angles on the outer surface of the guide column 73, and the cross-section of the cutting edge 75 is set to be a triangle. A connecting rod 76 is rotatably mounted on one side of the bottom end of the guide column 73. The number of connecting rods 76 is set to two groups, and the two groups of connecting rods 76 are relatively arranged on both sides of the bottom end of the guide column 73. A pin 77 is sleeved at the center of the bottom end of the two groups of connecting rods 76, and the bottom end of the pin 77 is fixedly connected to the bottom end of the inner wall of the sponge column 65.

[0050] When the substrate 61 deflects and rises, the substrate 61 drives the sponge column 65 at the top to contact the bottom end of the installation cavity 64 of the previous group of substrates 61. When the sponge column 65 rises, it drives the two groups of connecting rods 76 to drive the guide column 73 to rise synchronously through the pin shaft 77. At the same time, the positioning frame 72 fixes the bottom end of the liquid capsule 71. When the guide column 73 rises, it pierces the liquid capsule 71 through the conical structure and cutting edge 75 at the top. The medical glue stored in the liquid capsule 71 falls into the sponge column 65 through the through hole 74 on the outer surface of the guide column 73. After the sponge column 65 absorbs the medical glue, it adheres to the top end of another group of substrates 61. When the insertion of the substrate 61 is completed, the multiple groups of substrates 61 are placed in the positioning mold 63 and wait for the medical glue to completely solidify. Then, the medical staff removes the positioning mold 63 from the multiple groups of substrates 61. Because the polylactic acid resin has a certain elasticity, when the medical staff demoulds the positioning mold 63, it avoids causing secondary changes to the overall shape of the multiple groups of substrates 61 after molding.

[0051] By setting a linkage between the liquid capsule 71 and the guide column 73, when the multiple groups of substrates 61 are adaptively adjusted, the medical glue in the liquid capsule 71 is pierced by the guide column 73, and by utilizing the porous and easy-to-adsorb characteristics of the sponge column 65, the multiple groups of substrates 61 are preliminarily fixed when the multiple groups of substrates 61 are adaptively adjusted. The medical glue has a hysteresis when solidifying. After the multiple groups of substrates 61 are adaptively adjusted, the multiple groups of substrates 61 are preliminarily fixed to ensure the installation accuracy of the substrates 61 when they are subsequently installed in conjunction with the replacement components 8.

[0052] like Figures 8 to 9As shown, the replacement component 8 includes a mounting base 81, a positioning hole 82 is fixedly installed at one end of the mounting base 81, the inner wall of the positioning hole 82 is in contact with the outer surface of the positioning column 610, a screw hole 83 is installed at the other end of the mounting base 81, and a fixing stud 84 is threadedly connected to the inner wall of the screw hole 83, and the fixing stud 84 is threadedly connected to the inner wall of the screw hole 83 and the threaded hole on one side of the substrate 61, and an arc track 85 is fixedly installed at one end of the mounting base 81. The number of arc tracks 85 is set to two groups, and the two groups of arc tracks 85 are parallelly installed on one end of the mounting base 81, and a support plate 86 is sleeved on the outer surface of the arc track 85, and the top and bottom ends of the support plate 86 are both provided with arc grooves 87, and the top of the support plate 86 is threadedly connected to the top of the mounting base 81 through screws.

[0053] After the multiple groups of base plates 61 are formed, the medical staff inserts the mounting base 81 into the positioning column 610 on one side of the base plate 61 through the positioning hole 82. After the mounting base 81 is inserted into place, the medical staff screws the fixing stud 84 into the screw hole 83, and threadedly connects the mounting base 81 and the base plate 61 through the fixing stud 84. After the fixing stud 84 is installed, the medical staff slides the support plate 86 along the arc track 85 and threadedly connects the support plate 86 and the top of the mounting base 81 through screws. The arc grooves 87 at both ends of the support plate 86 can increase the contact area between the support plate 86 and the bone cement when bone cement is subsequently poured, ensuring that the support plate 86 and the bone cement are solidified. The medical staff can replace the support plates 86 of different materials in real time after the installation of the installation base 81 is completed according to the patient's bone condition and the patient's usage needs; then the medical staff inserts the multiple sets of base plates 61 into the humeral bone cavity of the patient's shoulder joint, and injects bone cement into the humeral bone cavity. After waiting for the bone cement to solidify, the medical staff fixes the glenoid liner 2 on the top of the reverse shoulder humeral body 1, and fixes the metal glenoid back plate 4 on the bone section on one side of the patient's shoulder joint through the metal glenoid back plate fixing screws 5, so that the glenosphere head 3 contacts the glenoid liner 2, and then sutures the skin at the patient's shoulder joint to complete the implantation and installation of the shoulder joint prosthesis.

[0054] By setting the coordination between the arc track 85 and the support plate 86, and cooperating with the adaptive adjustment effect of the adjustment component 6, while ensuring the installation accuracy of the base plate 61, the support plate 86 further ensures the installation stability of the shoulder joint prosthesis and the inner wall of the humeral bone cavity of different patients. While adapting to the humeral bone cavity of different patients, the stability of the shoulder joint prosthesis during implantation is ensured, the error during installation of the shoulder joint prosthesis is reduced, and the failure of the patient's shoulder joint surgery is avoided. At the same time, medical staff can replace the support plate 86 of different materials according to the patient's bone condition and actual needs, so as to further improve the flexibility of the support plate 86 during implantation and installation.

[0055] The present application also provides a method for preparing a customizable shoulder joint prosthesis using 3D printing, comprising the following steps:

[0056] S1. Using a dedicated scanning device to collect model point cloud data of the patient's shoulder joint, and creating a three-dimensional model of the patient's shoulder joint based on the obtained model point cloud data;

[0057] S2. Using the obtained three-dimensional shoulder joint model, a 3D printing device is used to print a proportional three-dimensional verification model of the patient's shoulder joint, and the patient's shoulder joint is measured and analyzed;

[0058] S3. After the structural support topology optimization is performed on the patient's proportional shoulder joint three-dimensional verification model, the finished product is 3D printed, and the surface of the shoulder joint prosthesis product obtained by 3D printing is smoothed;

[0059] S4. Prepare an optimized three-dimensional model of the shoulder joint prosthesis based on 3D printing technology to obtain a customized shoulder joint prosthesis based on the patient's three-dimensional model of the shoulder joint.

[0060] The working principle of the technical solution provided by the present invention is as follows:

[0061] Medical staff continuously connect multiple groups of substrates 61 through connecting rods 62 on the substrate 61 at the bottom end of the anti-scapulohumeral body 1, so that the sponge columns 65 on the upper group of substrates 61 are in contact with the mounting cavities 64 on the lower group of substrates 61 and are kept on the same axis. At this time, a single substrate 61 is in a horizontal state and multiple groups of substrates 61 are parallel to each other.

[0062] Then the medical staff inserts the positioning mold 63 into the patient's humeral bone cavity. The positioning mold 63 contacts the inner wall of the humeral bone cavity during the insertion process. Since the polylactic acid resin has a certain plasticity, the positioning mold 63 contacts the inner wall of the humeral bone cavity during the insertion process and deforms, so that the overall shape of the positioning mold 63 after deformation when contacting the inner wall of the humeral bone cavity during the insertion process is consistent with the inner wall of the patient's humeral bone cavity. At the same time, the polylactic acid resin has good biocompatibility, and when inserted into the patient's shoulder joint humeral bone cavity, it avoids irritating the patient's humerus. Then the medical staff inserts the multiple connected substrates 61 into the cavity of the positioning mold 63. The substrates When 61 enters the cavity of the positioning mold 63, under the insertion force of the medical staff, the substrate 61 is displaced against the inner wall of the cavity of the positioning mold 63, so that the substrate 61 is out of the horizontal state and the substrate 61 is offset to one side with the connecting rod 62 as the central axis. In this process, the multiple groups of substrates 61 are adhered and fixed by the fixing component 7. After the multiple groups of substrates 61 are fixed and formed, the positioning mold 63 together with the multiple groups of substrates 61 are pulled out from the patient's shoulder joint humeral bone cavity, and the positioning mold 63 on the multiple groups of substrates 61 are demolded and removed, and the subsequent support plate 86 is installed. After the support plate 86 is installed, it is inserted into the patient's shoulder joint humeral bone cavity.

[0063] When the substrate 61 deflects and rises, the substrate 61 drives the sponge column 65 at the top to contact the bottom end of the installation cavity 64 of the previous group of substrates 61. When the sponge column 65 rises, it drives the two groups of connecting rods 76 to drive the guide column 73 to rise synchronously through the pin shaft 77. At the same time, the positioning frame 72 fixes the bottom end of the liquid capsule 71. When the guide column 73 rises, it pierces the liquid capsule 71 through the conical structure and cutting edge 75 at the top. The medical glue stored in the liquid capsule 71 falls into the sponge column 65 through the through hole 74 on the outer surface of the guide column 73. After the sponge column 65 absorbs the medical glue, it adheres to the top end of another group of substrates 61. When the insertion of the substrate 61 is completed, the multiple groups of substrates 61 are placed in the positioning mold 63 and wait for the medical glue to completely solidify. Then, the medical staff removes the positioning mold 63 from the multiple groups of substrates 61. Because the polylactic acid resin has a certain elasticity, when the medical staff demoulds the positioning mold 63, it avoids causing secondary changes to the overall shape of the multiple groups of substrates 61 after molding.

[0064] After multiple groups of base plates 61 are formed, the medical staff inserts the mounting base 81 into the positioning column 610 on one side of the base plate 61 through the positioning hole 82. After the mounting base 81 is inserted into place, the medical staff screws the fixing stud 84 into the screw hole 83, and threadedly connects the mounting base 81 and the base plate 61 through the fixing stud 84. After the fixing stud 84 is installed, the medical staff slides and clamps the support plate 86 along the arc track 85, and threadedly connects the support plate 86 and the top of the mounting base 81 through screws. The arc grooves 87 at both ends of the support plate 86 can increase the contact area between the support plate 86 and the bone cement when bone cement is subsequently poured, thereby ensuring the connection effect between the support plate 86 and the bone cement after solidification. At the same time, the medical staff can replace the support plate 86 of different materials in real time after the mounting base 81 is installed according to the patient's bone condition and the patient's usage needs.

[0065] The medical staff then inserted multiple sets of base plates 61 into the humeral bone cavity of the patient's shoulder joint, and poured bone cement into the humeral bone cavity. After waiting for the bone cement to solidify, the medical staff fixedly installed the glenoid liner 2 on the top of the reverse humeral body 1, and fixedly installed the metal glenoid back plate 4 on the bone section on one side of the patient's shoulder joint through the metal glenoid back plate fixing screws 5, so that the glenosphere head 3 contacted the glenoid liner 2, and then sutured the skin at the patient's shoulder joint to complete the implantation and installation of the shoulder joint prosthesis.

[0066] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0067] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A customizable shoulder joint prosthesis using 3D printing, characterized in that: include: An inverse shoulder humerus body, wherein a glenoid liner is fixedly installed on the top of the inverse shoulder humerus body, one end of the glenoid liner contacts a glenosphere head, one end of the glenosphere head is fixedly installed with a metal glenoid back plate, and one end of the metal glenoid back plate is threadedly connected with a metal glenoid back plate fixing screw; An adjustment component is provided at the bottom end of the anti-scapulohumeral body, and the adjustment component is used to adjust according to the actual situation of the inner wall of the patient's humerus; A fixing component, wherein the inner wall of the adjusting component is provided with a fixing component, and the fixing component is used for preliminarily fixing the adjusting component; A replacement component, wherein a replacement component is provided on one side of the adjustment component, and the replacement component is used to support the inner wall of the patient's humerus and can be replaced according to the patient's needs; The adjustment component includes a base plate, the base plate is fixedly mounted on the bottom end of the humeral body, a positioning column is installed at an equal angle at one side edge of the base plate, a connecting rod is connected to the bottom end of the base plate, the number of the base plates is set to multiple groups, the multiple groups of base plates are movably connected through multiple groups of connecting rods, and a positioning mold is sleeved on the side of the base plate, and the material of the positioning mold is polylactic acid resin; The top of the substrate is provided with mounting cavities, the number of the mounting cavities is set to four groups, the four groups of mounting cavities are arranged at equal angles on the top of the substrate, and the mounting angles between the four groups of mounting cavities are set to 90 degrees; The fixing assembly includes a liquid capsule, the liquid capsule is mounted on the inner wall of the mounting cavity, a positioning frame is mounted on the bottom of the liquid capsule, the side of the positioning frame is fixedly connected to the inner wall of the mounting cavity, the number of the positioning frames is set to two groups, and the two groups of positioning frames are respectively mounted on the bottom and top of the liquid capsule; The center of the bottom end of the liquid capsule contacts a guide column, the top of the guide column is a conical structure, the outer surface of the guide column is provided with through holes, the through holes are arranged in an array on the outer surface of the guide column, and the outer surface of the guide column is provided with cutting edges arranged at equal angles, and the cross-section of the cutting edge is set to be a triangle; The replacement assembly includes a mounting base, a positioning hole is fixedly mounted on one end of the mounting base, the inner wall of the positioning hole contacts the outer surface of the positioning column, a screw hole is mounted on the other end of the mounting base, a fixing stud is threadedly connected to the inner wall of the screw hole, and the fixing stud is threadedly connected to the inner wall of the screw hole and the threaded hole on one side of the base plate; An arc track is fixedly installed at one end of the mounting base, and the number of the arc tracks is set to two groups. The two groups of arc tracks are installed in parallel at one end of the mounting base. A support plate is sleeved on the outer surface of the arc track, and arc grooves are provided at the top and bottom ends of the support plate. The top end of the support plate is threadedly connected to the top end of the mounting base by screws.

2. The customizable shoulder joint prosthesis using 3D printing according to claim 1, characterized in that: A sponge column is fixedly mounted at the bottom end of the mounting cavity, and the bottom end of the sponge column is in contact with the top end of another group of base plates.

3. The customizable shoulder joint prosthesis using 3D printing according to claim 2, characterized in that: A connecting rod is rotatably installed on one side of the bottom end of the guide column. The number of the connecting rods is set to two groups. The two groups of connecting rods are relatively arranged on both sides of the bottom end of the guide column. A pin is sleeved at the center of the bottom end of the two groups of connecting rods, and the bottom end of the pin is fixedly connected to the bottom end of the inner wall of the sponge column.

4. The method for preparing a customizable shoulder joint prosthesis using 3D printing according to any one of claims 1 to 3, characterized in that: Here are the steps: S1. Using a dedicated scanning device to collect model point cloud data of the patient's shoulder joint, and creating a three-dimensional model of the patient's shoulder joint based on the obtained model point cloud data; S2. Using the obtained three-dimensional shoulder joint model, a 3D printing device is used to print a proportional three-dimensional verification model of the patient's shoulder joint, and the patient's shoulder joint is measured and analyzed; S3. After the structural support topology optimization is performed on the patient's proportional shoulder joint three-dimensional verification model, the finished product is 3D printed, and the surface of the shoulder joint prosthesis product obtained by 3D printing is smoothed; S4. Prepare an optimized three-dimensional model of the shoulder joint prosthesis based on 3D printing technology to obtain a customized shoulder joint prosthesis based on the patient's three-dimensional model of the shoulder joint.

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