A shoulder joint prosthesis with a microporous tantalum coating and its installation method without examination

Abstract

The present invention provides a shoulder joint prosthesis without a trial mold having a microporous tantalum coating and an installation method thereof, belonging to the technical field of medical devices. It includes a constrained humeral prosthesis mechanism and a glenoid spherical prosthesis. The constrained humeral prosthesis mechanism includes a humeral stem body, a reference platform is provided at the top of the humeral stem body, a humeral adapter plate is connected to the top of the reference platform, a calibration component is installed inside the humeral adapter plate, a sealing cover is connected to the top of the calibration component, and a mating component is installed on the top surface of the sealing cover. By providing a humeral stem body, an inner stem body and a support stem to replace the existing regular multi-type humeral stem prostheses, and at the same time using the calibration component to change the orientation of the ball socket on the inner snap-in plate to adapt to the glenoid spherical prosthesis at different angles, the present invention solves the problems of poor versatility of the existing humeral stem prostheses and increased burden on the patient's humerus.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to a shoulder joint prosthesis with a microporous tantalum coating and an installation method thereof without a trial mold. Background Art

[0002] A shoulder joint prosthesis is a complete shoulder joint system, including two major series: a non-constrained shoulder joint prosthesis (hemishoulder and total shoulder) and a constrained shoulder joint prosthesis (reverse shoulder). In each series, multiple types of humeral stem prostheses can be provided, such as: a cemented primary replacement type, a non-cemented primary replacement type, a cemented revision long stem, and a fracture type humeral stem specifically designed for proximal humeral fractures.

[0003] Existing humeral stem prostheses all adopt a platform design, and can be connected to non-constrained and constrained shoulder joint prostheses above, allowing doctors to convert between total shoulder and reverse shoulder while retaining the humeral stem. They are integrally cast using titanium alloy materials, so they are relatively heavy and impose a greater burden on the patient's humerus. At the same time, they will damage the muscles at the connection during movement.

[0004] Due to the different relative positions of the humeral head on the humerus and the glenoid cavity on the scapula in different patients, during shoulder joint replacement surgery, it is necessary to perform a trial mold on the humerus. The role of the trial mold is to pre-install the joint, facilitate the selection of a suitable type of humeral stem prosthesis, and perform angle adjustment, which reduces the surgical efficiency, increases the use cost of the humeral stem prosthesis, and cannot achieve the anatomical reconstruction of the proximal humerus. Therefore, the present application provides a shoulder joint prosthesis with a microporous tantalum coating and an installation method thereof without a trial mold to meet the requirements. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a shoulder joint prosthesis with a microporous tantalum coating and an installation method thereof without a trial mold. By providing a humeral stem body, an inner stem body, and a support stem to replace the existing regular multi-type humeral stem prostheses, and at the same time using an alignment component to change the orientation of the ball socket on the inner buckle plate to adapt to the glenoid spherical prosthesis at different angles, the problems of poor versatility of the existing humeral stem prostheses and increased burden on the patient's humerus are solved.

[0006] To solve the above technical problems, the present invention provides the following technical solutions:

[0007] A shoulder joint prosthesis without a trial mold having a microporous tantalum coating, comprising a constrained humeral prosthesis mechanism and a glenoid spherical prosthesis. The constrained humeral prosthesis mechanism includes a humeral stem body, a reference platform is provided at the top of the humeral stem body, a humeral adapter plate is connected to the top of the reference platform, a calibration component is installed inside the humeral adapter plate, a sealing cover is connected to the top of the calibration component, and a matching component is installed on the top surface of the sealing cover; the calibration component includes a humeral pad, an inner adjustment slide rail is provided in the middle of the top surface of the humeral pad, a slide seat is slidably connected to the inner wall of the inner adjustment slide rail, a threaded hole three is opened at the top of the slide seat, a main base surface and a secondary base surface are respectively provided on the bottom surface and the top surface of the humeral pad, both the main base surface and the secondary base surface are circular, and the perpendicular bisectors perpendicular to the center of the circle do not coincide.

[0008] Optionally, a set screw seat is inserted into the inner wall of the outer end of the inner adjustment slide rail, receiving holes are opened in both the set screw seat and the inner wall of the inner adjustment slide rail, sleeves are fixedly installed on the inner walls of the two receiving holes, the same screw is rotatably connected to the inner walls of the two sleeves, and the slide seat is engaged with the screw.

[0009] Optionally, a cross slot is opened at the top of the humeral stem body, an inner stem body is provided at the top of the humeral stem body, a corrugated spline groove is opened on the outer wall of the bottom of the inner stem body, a cross seat is fixedly installed at the bottom of the inner stem body, and the cross seat is inserted into the cross slot. A jack one is opened on the outer wall of the top of the humeral stem body, and the jack one penetrates through the cross seat. There are multiple groups of the jack one, and they are distributed on the circumferential wall of the top of the humeral stem body. Plug posts one are inserted into the inner walls of the multiple groups of the jack one, and the cross seat is fixedly connected to the humeral stem body through the plug posts one.

[0010] Optionally, a flat keyway is opened at the top of the inner stem body, jacks two are opened at the four corners of the inner walls on both sides of the flat keyway, and the jacks two penetrate through the side wall of the inner stem body. A support handle is clamped in the inner wall of the flat keyway, a jack three is opened at the bottom of the support handle, the jack three is used in cooperation with the corresponding jack two, and the same plug post two is inserted, and the support handle is fixedly connected to the inner stem body through multiple groups of plug posts two.

[0011] Optionally, a bone fixation groove is opened in the middle of the support handle, positioning frame grooves are opened on both side walls in the middle of the support handle, and the positioning frame grooves coincide with the midline of the bone fixation groove. An outer bone fixation block is inserted into the inner wall of the bone fixation groove, a left positioning frame is fixedly installed on the outer bone fixation block, the left positioning frame is engaged with the left positioning frame groove, a right positioning frame is sleeved on the outer bone fixation block, and the right positioning frame is engaged with the right positioning frame groove. Both the left positioning frame and the right positioning frame are fixedly connected to the support handle by screws.

[0012] Optionally, the top of the humeral stem body and the outer wall of the support stem are both coated with a microporous tantalum coating, and the microporous tantalum coating wraps the top of the humeral stem body, the inner stem body, the support stem and the external bone block. The external bone block is fixed to the patient's humerus through an external screw. The top of the microporous tantalum coating is fixedly connected to the bottom surface of the reference platform. The top of the support stem penetrates through the reference platform, and the top surface of the support stem is flush with the top surface of the reference platform.

[0013] Optionally, a first threaded hole is provided in the middle of the top surface of the support stem. An inner assembly groove is provided in the inner wall of the humeral adapter plate. There are multiple groups of the inner assembly grooves, and they are arranged in a circumferential array. Nut sleeves are fixedly installed on the inner walls of the multiple groups of inner assembly grooves. A second threaded hole is provided in the middle of the humeral adapter plate. The second threaded hole is aligned with the center line of the first threaded hole, and both are engaged with a first bolt. The humeral adapter plate is fixedly connected to the support stem through the first bolt. Arc-shaped grooves are provided on both sides of the top of the humeral pad. Multiple second bolts are provided on the inner walls of the arc-shaped grooves, and the second bolts can be used in cooperation with the nut sleeves.

[0014] Optionally, a sealing straight bar is fixedly installed on the inner wall of the middle of the sealing cover, and the sealing straight bar is hermetically clamped with the inner adjustment slide rail. A cut can be cut out on the sealing straight bar, and the cut is hermetically matched with the outer wall of the sliding seat. Sealing arc-shaped bars are fixedly installed on both sides of the inner wall of the bottom of the sealing cover, and the sealing arc-shaped bars are hermetically clamped with the arc-shaped grooves. The sealing cover is clamped with the outer wall of the humeral pad.

[0015] Optionally, the matching component includes a positioning disk. A fourth threaded hole is provided in the middle of the positioning disk. The fourth threaded hole is aligned with the center line of the third threaded hole, and both are engaged with a third bolt. The positioning disk is fixedly connected to the sliding seat through the third bolt. An elastic clamping groove is provided on the top surface of the positioning disk, and an inner clamping disk is clamped in the elastic clamping groove. A ball socket is provided on the top of the inner clamping disk, and the ball socket is used in cooperation with the glenoid spherical prosthesis.

[0016] The present application also provides another technical solution: an installation method for a non-template shoulder joint prosthesis with a microporous tantalum coating, including the following steps:

[0017] S1: Insert the cross seat at the bottom of the inner stem body into the cross slot. By driving a first plug into the first jack, the installation of the humeral stem body and the inner stem body is completed. Then, the support stem is clamped into the one-way bayonet, and then the second plug is driven in to complete the installation of the support stem. Then, the external bone block is clamped into the bone fixing groove, and the external bone block is fixed through the left positioning frame and the right positioning frame;

[0018] S2: After the installation of the humeral stem body, the inner stem body, the support stem and the external bone block is completed, sintered tantalum metal is added to the top of the humeral stem body to form a microporous tantalum coating on the top of the humeral stem body. The microporous tantalum coating wraps the top of the humeral stem body, the inner stem body, the support stem and the external bone block, and a reference platform is installed on the top of the support stem;

[0019] S3: Remove the joint head at the top of the patient's humerus through external surgery, grind and drill holes in the top of the humerus, then install the humerus shank into the humerus, and at the same time fix the whole formed in S2 to the humerus by driving in screws;

[0020] S4: Install the humerus adapter plate onto the top of the support shank through bolt one. After that, snap the bottom of the humerus pad into the humerus adapter plate. According to the positions of the joint head on the patient's humerus and the glenoid cavity on the scapula, rotate the humerus pad so that the main base surface rotates within the humerus adapter plate. Since the centers of the main base surface and the secondary base surface are different, as the main base surface rotates, the position of the perpendicular bisector on the secondary base surface will also change. When the secondary base surface is most suitable for the movement of the patient's shoulder joint, stop the rotation of the main base surface, and drive bolt two into the nut sleeve through the arc-shaped groove, thus completing the installation of the humerus pad;

[0021] S5: After installing the humerus pad into the humerus adapter plate, turn the screw rod with a screwdriver to engage the screw rod with the sliding seat, thereby changing the position of the sliding seat so that the sliding seat coincides with the perpendicular bisector of the secondary base surface. After that, cut the sealing strip according to the position of the sliding seat to determine the position of the cut. Finally, install the sealing cover on the top of the humerus pad to prevent blood from entering the humerus pad;

[0022] S6: Install the positioning plate onto the sliding seat through bolt three, and press the inner snap-in plate to snap it into the positioning plate, thus completing the installation of the inner snap-in plate. After that, drill holes after trimming the glenoid cavity, install the glenoid spherical prosthesis into the glenoid cavity, and trim the surrounding tissues of the joint to increase the joint movement space, so that the glenoid ball head on the glenoid spherical prosthesis rotates within the ball socket, thus completing the installation of the shoulder joint prosthesis for the patient.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects:

[0024] In the above solution, by setting the humerus shank, inner shank and support shank to replace the existing regular multi-type humerus shank prostheses, the humerus shank assembly adopts a split structure for assembly, and the humerus shank uses a carbon fiber reinforced epoxy resin composite material, which has an elastic modulus equivalent to that of human bone, will not have the problem of stress shielding, can prevent the artificial prosthesis from loosening, extends the service life of the prosthesis, makes it more in line with the lightweight design without reducing the support strength of the humerus shank, optimizes the overall volume of the humerus shank, and the split structure can reduce the maintenance cost. Without reducing the support strength of the humerus shank, it makes it more in line with the lightweight design, optimizes the overall volume of the humerus shank, and the split structure can reduce the maintenance cost. At the same time, the connection part is wrapped with a microporous tantalum coating, which not only prevents the internal connecting parts from damaging the bone quality, but also promotes the growth of the humerus shank assembly and the bone.

[0025] After the bottom of the humeral pad is installed into the humeral adapter plate, due to the different centers of the main base surface and the secondary base surface, when the humeral pad is rotated, the position of the perpendicular bisector on the secondary base surface will change. By changing the position of the sliding seat so that it is always located on the perpendicular bisector of the secondary base surface, it is ensured that the mating component can be perfectly matched with the glenoid spherical prosthesis, avoiding the need for trial molding before installing the humeral stem. At the same time, the humeral stem of the present invention can be used for installing various types of reverse shoulder joint prostheses, and the ball socket at the top of the proximal humerus can be adjusted at multiple angles, thus realizing the anatomical reconstruction of the proximal humerus. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0027] Figure 1 It is a three-dimensional structural schematic diagram of a shoulder joint prosthesis with a microporous tantalum coating without trial molding;

[0028] Figure 2 It is a three-dimensional structural schematic diagram of a restricted humeral prosthesis mechanism;

[0029] Figure 3 It is a coating diagram of the microporous tantalum coating;

[0030] Figure 4 It is an installation structure diagram of the inner stem and the humeral stem;

[0031] Figure 5 It is an installation structure diagram of the support stem and the external fixation bone block;

[0032] Figure 6 It is an installation structure diagram of each component on the humeral stem;

[0033] Figure 7 It is an installation position diagram of the mating component;

[0034] Figure 8 It is an installation position diagram of the alignment component;

[0035] Figure 9 It is an installation schematic diagram of the humeral adapter plate;

[0036] Figure 10 It is a bottom-up three-dimensional view of the humeral adapter plate;

[0037] Figure 11 It is a three-dimensional structural schematic diagram of the alignment component;

[0038] Figure 12 It is a three-dimensional exploded view of the alignment component;

[0039] Figure 13 This is a schematic diagram of the installation of the sealing cover;

[0040] Figure 14 The position diagram of the main base surface and the secondary base surface;

[0041] Figure 15 This is a schematic diagram of the installation of the inner buckle plate;

[0042] Figure 16 This is an exploded bottom view of the mating assembly.

[0043] Reference numerals:

[0044] 100. Restrictive humeral prosthesis mechanism; 110. Humeral handle body; 111. Cross slot; 112. Inner handle body; 113. Flower slot; 114. Cross seat; 115. Socket one; 116. Plug column one; 117. Straight bayonet; 118. Socket two; 120. Support handle; 121. Bone fixing groove; 122. Positioning frame groove; 123. Socket three; 124. Threaded hole one; 125. External bone fixing block; 126. Left positioning frame; 127. Right positioning frame; 128. Plug column two; 130. Microporous tantalum coating; 140. Reference platform; 150. Humeral adapter plate; 151. Inner assembly groove; 152. Nut sleeve; 153. Threaded hole two; 154, bolt one; 160, alignment assembly; 161, humeral pad; 162, arc groove; 163, bolt two; 164, inner adjustment slide; 165, receiving socket; 166, fixing seat; 167, sleeve; 168, screw; 169, slide; 170, threaded hole three; 180, main base surface; 181, secondary base surface; 190, sealing cover; 190, sealing straight strip; 192, notch; 193, sealing arc strip; 200, matching assembly; 210, positioning plate; 211, elastic slot; 212, threaded hole four; 220, bolt three; 230, inner buckle plate; 240, socket; 300, glenosphere prosthesis.

[0045] 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

[0046] The following will describe in detail a shoulder joint prosthesis without a trial mold with a microporous tantalum coating and its installation method provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0047] As Figures 1 to 16 shown, an embodiment of the present invention provides a shoulder joint prosthesis without a trial mold with a microporous tantalum coating, including a constrained humeral prosthesis mechanism 100 and a glenoid spherical prosthesis 300. The constrained humeral prosthesis mechanism 100 includes a humeral stem 110. A reference platform 140 is provided at the top of the humeral stem 110. A humeral adapter plate 150 is connected to the top of the reference platform 140. An alignment component 160 is installed inside the humeral adapter plate 150. A sealing cover 190 is connected to the top of the alignment component 160. A cooperation component 200 is installed on the top surface of the sealing cover 190.

[0048] The alignment component 160 includes a humeral pad 161. A central inner adjustment slide rail 164 is provided in the middle of the top surface of the humeral pad 161. A slide seat 169 is slidably connected to the inner wall of the inner adjustment slide rail 164. The slide seat 169 can slide within the inner adjustment slide rail 164. A threaded hole three 170 is opened at the top of the slide seat 169. A main base surface 180 and a secondary base surface 181 are respectively provided on the bottom surface and the top surface of the humeral pad 161. Both the main base surface 180 and the secondary base surface 181 are circular, and the perpendicular bisectors perpendicular to the center of the circle do not coincide. In the present invention, after the bottom of the humeral pad 161 is installed into the humeral adapter plate 150, since the centers of the main base surface 180 and the secondary base surface 181 are different, when the humeral pad 161 is rotated, the position of the perpendicular bisector on the secondary base surface 181 will change. By changing the position of the slide seat 169 to make it always located on the perpendicular bisector of the secondary base surface 181, it is ensured that the cooperation component 200 can be perfectly matched with the glenoid spherical prosthesis 300.

[0049] As Figure 11 and Figure 12As shown, a set screw seat 166 is inserted into the inner wall at the outer end of the inner adjustment slide rail 164. The set screw seat 166 limits the movement of the slide seat 169. Insertion holes 165 are formed in both the inner wall of the set screw seat 166 and the inner wall of the inner adjustment slide rail 164. Sleeve 167 is fixedly installed on the inner wall of each of the two insertion holes 165. A same screw 168 is rotatably connected to the inner walls of the two sleeves 167. The slide seat 169 meshes with the screw 168. In this application, after the slide seat 169 and the screw 168 are fitted, the screw 168 is inserted into the sleeve 167 inside the inner adjustment slide rail 164. At this time, the slide seat 169 is located inside the inner adjustment slide rail 164. Then, the set screw seat 166 is inserted into the outer end wall of the inner adjustment slide rail 164 to complete the assembly of the humeral pad 161. Particularly, when the base surface 181 is most suitable for the movement of the patient's shoulder joint, the second bolt 163 is driven into the nut sleeve 152 through the arc-shaped groove 162 to complete the installation of the humeral pad 161. After that, the screw 168 is rotated by a screwdriver to make the screw 168 mesh with the slide seat 169, thereby changing the position of the slide seat 169 so that the slide seat 169 coincides with the perpendicular bisector of the base surface 181.

[0050] As Figures 4 to 7 shown, a cross slot 111 is formed at the top of the humeral stem 110. An inner stem 112 is provided at the top of the humeral stem 110. A corrugated spline groove 113 is formed on the outer wall at the bottom of the inner stem 112. The corrugated spline groove 113 can increase the contact surface with the microporous tantalum coating 130 and prevent the microporous tantalum coating 130 from falling off. A cross seat 114 is fixedly installed at the bottom of the inner stem 112, and the cross seat 114 is inserted into the cross slot 111. Both the inner stem 112 and the cross seat 114 are made of continuous carbon fiber reinforced polyetheretherketone (PEEK) high-performance thermoplastic composite material. An insertion hole one 115 is formed on the outer wall at the top of the humeral stem 110, and the insertion hole one 115 penetrates through the cross seat 114. There are multiple groups of insertion hole one 115, and they are distributed on the circumferential wall at the top of the humeral stem 110. Plug posts one 116 are inserted into the inner walls of the multiple groups of insertion hole one 115. The cross seat 114 is fixedly connected to the humeral stem 110 through the plug posts one 116. In the present invention, the strength of the continuous carbon fiber reinforced polyetheretherketone (PEEK) high-performance thermoplastic composite material exceeds that of titanium alloy, and its modulus is closer to the bone modulus. It is not easy to have the situation of broken plates during the postoperative recovery process. It has extremely high wear resistance, corrosion resistance and fracture resistance, is more heat-resistant and has higher strength than the traditional carbon fiber reinforced thermosetting composite material, improving the stability of the cross seat 114.

[0051] The inner handle body 112 is provided with a straight-line bayonet 117 on the top, and two sockets 118 are provided at the four corners of the inner walls on both sides of the straight-line bayonet 117, and the two sockets 118 penetrate the side walls of the inner handle body 112. A support handle 120 is clamped on the inner wall of the straight-line bayonet 117. The support handle 120 is made of titanium alloy material as a whole. A three socket 123 is provided at the bottom of the support handle 120. The three sockets 123 are used in conjunction with the corresponding two sockets 118, and are plugged with the same two plug posts 128. The support handle 120 is fixedly connected to the inner handle body 112 through multiple groups of two plug posts 128.

[0052] The support handle 120 is provided with a bone fixing groove 121 in the middle, and positioning frame grooves 122 are provided on both side walls of the middle of the support handle 120, and the positioning frame groove 122 coincides with the midline of the bone fixing groove 121, and an external bone fixing block 125 is inserted into the inner wall of the bone fixing groove 121, and the external bone fixing block 125 is made of titanium alloy material, and a left positioning frame 126 is fixedly installed on the external bone fixing block 125, and the left positioning frame 126 is engaged with the positioning frame groove 122 on the left side, and a right positioning frame 127 is sleeved on the external bone fixing block 125, and the right The positioning frame 127 is engaged with the positioning frame groove 122 on the right side, and the left positioning frame 126 and the right positioning frame 127 are fixedly connected to the support handle 120 by screws. In the present invention, the cross seat 114 at the bottom of the inner handle body 112 is inserted into the cross slot 111, and the plug column 116 is driven into the socket 115 to complete the installation of the humeral handle body 110 and the inner handle body 112, and then the support handle 120 is inserted into the slot 117, and then the plug column 128 is driven to complete the installation. After the support handle 120 is installed, the external bone block 125 is inserted into the bone groove 121, and the external bone block 125 is fixed by the left positioning frame 126 and the right positioning frame 127. In particular, the existing standardized multi-type humeral stem prostheses, such as: bone cement fixed primary replacement type, non-bone cement fixed primary replacement type, bone cement fixed revision long handle and fracture type humeral stem designed for proximal humeral fractures, all adopt a platform design and are cast as a whole using titanium alloy. In the humeral stem body 110 assembly proposed in the present invention, a split structure is adopted for assembly, and the humeral stem body 110 uses a carbon fiber reinforced epoxy resin composite material, which has an elastic modulus equivalent to that of human bones, does not have stress shielding problems, can prevent the artificial prosthesis from loosening, and prolongs the service life of the prosthesis. Without reducing the supporting strength of the humeral stem body 110, it is more in line with the lightweight design, optimizes the overall volume of the humeral stem body 110, and the split structure can reduce maintenance costs.

[0053] like Figure 3As shown, a microporous tantalum coating 130 is provided on the outer walls of the humeral stem body 110 and the support handle 120. The microporous tantalum coating 130 takes less time to grow together with the human bone. Moreover, the microporous tantalum coating 130 wraps the outer wall of the humeral stem body 110, the inner stem body 112, the support handle 120 and the external bone fixation block 125. The external bone fixation block 125 is fixed to the patient's humerus by an external screw. The top of the microporous tantalum coating 130 is fixedly connected to the bottom surface of the reference platform 140. The top of the support handle 120 penetrates through the reference platform 140, and the top surface of the support handle 120 is flush with the top surface of the reference platform 140. In the present invention, the microporous tantalum coating 130 can wrap the joints between the support handle 120 and the inner stem body 112, and between the inner stem body 112 and the humeral stem body 110, preventing the internal connecting parts from damaging the bone mass. At the same time, it promotes the growth of the humeral stem body 110 assembly and the bone, enhances the corrosion resistance and biocompatibility of the prosthesis, has high strength, is wear-resistant, and has a stronger adhesion effect on human cells, creating good conditions for the ingrowth and proliferation of bone cells, achieving the effects of long-term stability and extended service life.

[0054] As Figure 9 and Figure 10 shown, a first threaded hole 124 is provided in the middle of the top surface of the support handle 120. An inner assembly groove 151 is provided in the inner wall of the humeral adapter plate 150. There are multiple groups of inner assembly grooves 151, and they are arranged in a circumferential array. Nut sleeves 152 are fixedly installed on the inner walls of the multiple groups of inner assembly grooves 151. A second threaded hole 153 is provided in the middle of the humeral adapter plate 150. The center lines of the second threaded hole 153 and the first threaded hole 124 are aligned, and a first bolt 154 is engaged with both of them. The humeral adapter plate 150 is fixedly connected to the support handle 120 by the first bolt 154. Arc-shaped grooves 162 are provided on both sides of the top of the humeral pad 161. Multiple second bolts 163 are provided on the inner walls of the arc-shaped grooves 162, and the second bolts 163 can be used in cooperation with the nut sleeves 152. In the present invention, the humeral adapter plate 150 is installed on the top of the support handle 120 by the first bolt 154. Thereafter, the bottom of the humeral pad 161 is snapped into the humeral adapter plate 150. According to the positions of the joint head on the patient's humerus and the glenoid cavity on the scapula, the humeral pad 161 is rotated so that the main base surface 180 rotates within the humeral adapter plate 150. Since the centers of the main base surface 180 and the secondary base surface 181 are different, as the main base surface 180 rotates, the position of the perpendicular bisector on the secondary base surface 181 will also change. When the secondary base surface 181 is most suitable for the movement of the patient's shoulder joint, stop the rotation of the main base surface 180, and drive the second bolt 163 into the nut sleeve 152 through the arc-shaped groove 162, thereby completing the installation of the humeral pad 161.

[0055] As Figure 13As shown, a sealing straight bar 191 is fixedly installed on the inner wall of the middle part of the sealing cover 190, and the sealing straight bar 191 is hermetically engaged with the inner adjustment slide rail 164. A cut 192 can be cut out on the sealing straight bar 191, and the cut 192 is hermetically fitted with the outer wall of the slide seat 169. Sealing arc-shaped bars 193 are fixedly installed on the inner walls of both sides of the bottom of the sealing cover 190, and the sealing arc-shaped bars 193 are hermetically engaged with the arc-shaped grooves 162. In the present invention, the sealing straight bar 191 is cut according to the position of the slide seat 169, so as to determine the position of the cut 192. Finally, the sealing cover 190 is installed on the top of the humeral pad 161 to prevent blood from entering the humeral pad 161, and the sealing cover 190 is engaged with the outer wall of the humeral pad 161.

[0056] As Figure 7 , Figure 15 and Figure 16 shown, the matching assembly 200 includes a positioning disk 210. The positioning disk 210 is made of carbon fiber material and has a certain elasticity, and can be snapped into the inner snap disk 230. A threaded hole four 212 is opened in the middle of the positioning disk 210. The threaded hole four 212 is aligned with the center line of the threaded hole three 170, and a bolt three 220 is engaged with both of them. The positioning disk 210 is fixedly connected to the slide seat 169 through the bolt three 220. An elastic card slot 211 is opened on the top surface of the positioning disk 210, and an inner snap disk 230 is snap-fitted in the elastic card slot 211. A ball socket 240 is opened on the top of the inner snap disk 230. The positioning disk 210 and the inner snap disk 230 are made of continuous carbon fiber reinforced polyether ether ketone (PEEK) high-performance thermoplastic composite material. The strength of the carbon fiber reinforced PEEK exceeds that of titanium alloy, and it has extremely high wear resistance, corrosion resistance and break resistance. It is more heat-resistant and has higher strength than the traditional carbon fiber reinforced thermosetting composite material, which improves the stability of the connection between the positioning disk 210 and the inner snap disk 230. The ball socket 240 is used in cooperation with the glenoid spherical prosthesis 300. The glenoid spherical prosthesis 300 is mainly composed of a glenoid fixing disk and a glenoid ball head, and the glenoid ball head is fixed on the glenoid fixing disk by screws. In the present invention, the positioning disk 210 is installed on the slide seat 169 through the bolt three 220, and the inner snap disk 230 is pressed to snap it into the positioning disk 210, so as to complete the installation of the inner snap disk 230. After that, the glenoid cavity is trimmed and drilled, the glenoid spherical prosthesis 300 is installed into the glenoid cavity, and the surrounding tissues of the joint are trimmed to increase the joint movement space, so that the glenoid ball head on the glenoid spherical prosthesis 300 rotates in the ball socket 240, thus completing the installation of the shoulder joint prosthesis for the patient.

[0057] The working process of the technical solution provided by the present invention is as follows:

[0058] Insert the cross base 114 at the bottom of the inner handle body 112 into the cross slot 111. By driving the first plug 116 into the first jack 115, the installation of the humerus handle body 110 and the inner handle body 112 is completed. Then, snap the support handle 120 into the single slot 117. After that, drive the second plug 128 to complete the installation of the support handle 120. Then, snap the outer bone block 125 into the bone fixing groove 121 and fix the outer bone block 125 through the left positioning frame 126 and the right positioning frame 127. After installing the humerus handle body 110, the inner handle body 112, the support handle 120, and the outer bone block 125, perform ion spray coating of microporous tantalum on the top surface of the humerus handle body 110, which enhances the corrosion resistance and biocompatibility of the prosthesis, has high strength, is wear-resistant, has a stronger adhesion effect on human cells, creates good conditions for the ingrowth and proliferation of bone cells, achieves the effects of long-term stability and extended service life, forms a microporous tantalum coating 130 on the top of the humerus handle body 110, and the microporous tantalum coating 130 wraps the top of the humerus handle body 110, the inner handle body 112, the support handle 120, and the outer bone block 125, and installs a reference platform 140 on the top of the support handle 120.

[0059] Remove the joint head at the top of the patient's humerus through external surgery, grind and drill the top of the humerus, and then install the humerus handle body 110 into the humerus. At the same time, fix the humerus handle body 110 assembly to the humerus by driving screws. Install the humerus adapter plate 150 onto the top of the support handle 120 through the first bolt 154. After that, snap the bottom of the humerus liner 161 into the humerus adapter plate 150. According to the positions of the joint head on the patient's humerus and the glenoid cavity on the scapula, rotate the humerus liner 161 so that the main base surface 180 rotates within the humerus adapter plate 150. Since the centers of the main base surface 180 and the secondary base surface 181 are different, as the main base surface 180 rotates, the position of the perpendicular bisector on the secondary base surface 181 will also change. When the secondary base surface 181 is most suitable for the patient's shoulder joint movement, stop the rotation of the main base surface 180 and drive the second bolt 163 into the nut sleeve 152 through the arc-shaped groove 162 to complete the installation of the humerus liner 161. After installing the humerus liner 161 into the humerus adapter plate 150, rotate the screw rod 168 with a screwdriver to engage the screw rod 168 with the sliding seat 169, thereby changing the position of the sliding seat 169 so that the sliding seat 169 coincides with the perpendicular bisector of the secondary base surface 181. After that, cut the sealing strip 191 according to the position of the sliding seat 169 to determine the position of the cut 192. Finally, install the sealing cover 190 onto the top of the humerus liner 161 to prevent blood from entering the humerus liner 161.

[0060] The positioning disk 210 is installed on the sliding seat 169 through the bolt three 220, and the inner snap disk 230 is pressed to be snapped into the positioning disk 210, thereby completing the installation of the inner snap disk 230. After that, the glenoid cavity is trimmed and drilled, the glenoid spherical prosthesis 300 is installed into the glenoid cavity, and the surrounding tissues of the joint are trimmed to increase the joint movement space, so that the glenoid ball head on the glenoid spherical prosthesis 300 rotates in the ball socket 240, thereby completing the installation of the shoulder joint prosthesis for the patient.

[0061] This invention covers any alternatives, modifications, equivalent methods and solutions made within the spirit and scope of this invention. For the public to have a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments of this invention. However, those skilled in the art can fully understand this invention even without the description of these details. Additionally, well-known methods, processes, procedures, components and circuits, etc. are not described in detail to avoid unnecessary confusion to the essence of this invention.

[0062] The above are only the preferred embodiments of this invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of this invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of this invention.

Claims

1. An immune-free mold shoulder joint prosthesis with a microporous tantalum coating, comprising a constrained humeral prosthesis mechanism and a glenoid spherical prosthesis, characterized in that, The restricted humeral prosthesis mechanism includes a humeral stem body. A reference platform is provided at the top of the humeral stem body. A humeral adapter plate is connected to the top of the reference platform. An alignment component is installed inside the humeral adapter plate. A sealing cover is connected to the top of the alignment component. A matching component is installed on the top surface of the sealing cover. The alignment component includes a humeral pad. A central inner adjustment slide rail is provided in the middle of the top surface of the humeral pad. A sliding seat is slidably connected to the inner wall of the inner adjustment slide rail. A threaded hole three is provided at the top of the sliding seat. The bottom surface and the top surface of the humeral pad are respectively provided with a main base surface and a secondary base surface. Both the main base surface and the secondary base surface are circular, and the perpendicular bisectors perpendicular to the center of the circle do not coincide. When the bottom of the humeral pad is installed into the humeral adapter plate and the humeral pad is rotated, the position of the perpendicular bisector on the secondary base surface will change. By changing the position of the sliding seat, the sliding seat can always be located on the perpendicular bisector of the secondary base surface. A locking seat is inserted into the outer end inner wall of the inner adjustment slide rail. The locking seat is used to limit the movement of the sliding seat. Socket holes are provided in both the locking seat and the inner wall of the inner adjustment slide rail. Sleeves are fixedly installed on the inner walls of the two socket holes. The same screw rod is rotatably connected to the inner walls of the two sleeves. The sliding seat is engaged with the screw rod.

2. The shoulder joint prosthesis without a trial mold having a microporous tantalum coating according to claim 1, characterized in that, A cross slot is provided at the top of the humeral stem body. An inner stem body is provided at the top of the humeral stem body. A corrugated spline groove is provided on the outer wall of the bottom of the inner stem body. A cross seat is fixedly installed at the bottom of the inner stem body, and the cross seat is inserted into the cross slot. A socket hole one is provided on the outer wall of the top of the humeral stem body, and the socket hole one penetrates through the cross seat. There are multiple groups of the socket hole one, and they are distributed on the circumferential wall of the top of the humeral stem body. Plug posts one are inserted into the inner walls of the multiple groups of the socket hole one. The cross seat is fixedly connected to the humeral stem body through the plug posts one.

3. The shoulder prosthesis without a trial mold having a microporous tantalum coating according to claim 2, wherein A flat keyway is provided at the top of the inner stem body. Socket holes two are provided at the four corners of the inner walls on both sides of the flat keyway, and the socket holes two penetrate through the side wall of the inner stem body. A support handle is clamped in the inner wall of the flat keyway. A socket hole three is provided at the bottom of the support handle. The socket hole three is used in cooperation with the corresponding socket hole two, and the same plug post two is inserted. The support handle is fixedly connected to the inner stem body through multiple groups of plug posts two.

4. The shoulder joint prosthesis without a trial mold having a microporous tantalum coating according to claim 3, characterized in that, A bone fixation groove is provided in the middle of the support handle. Positioning frame grooves are provided on both side walls in the middle of the support handle, and the positioning frame grooves coincide with the center line of the bone fixation groove. An outer bone fixation block is inserted into the inner wall of the bone fixation groove. A left positioning frame is fixedly installed on the outer bone fixation block, and the left positioning frame is engaged with the left positioning frame groove. A right positioning frame is sleeved on the outer bone fixation block, and the right positioning frame is engaged with the right positioning frame groove. Both the left positioning frame and the right positioning frame are fixedly connected to the support handle through screws.

5. The shoulder joint prosthesis without a trial mold having a microporous tantalum coating according to claim 4, characterized in that, Microporous tantalum coatings are applied to both the top of the humeral stem body and the outer wall of the support handle, and the microporous tantalum coatings wrap the top of the humeral stem body, the inner stem body, the support handle, and the outer bone fixation block. The outer bone fixation block is fixed to the patient's humerus through external screws. The top of the microporous tantalum coating is fixedly connected to the bottom surface of the reference platform. The support handle penetrates through the reference platform, and the top surface of the support handle is flush with the top surface of the reference platform.

6. The non-bone cement shoulder joint prosthesis with a microporous tantalum coating according to claim 3, characterized in that, A threaded hole 1 is provided in the middle of the top surface of the support handle. An inner assembly groove is provided in the inner wall of the humerus adapter plate. There are multiple groups of the inner assembly grooves, which are arranged in a circumferential array. Nut sleeves are fixedly installed on the inner walls of the multiple groups of inner assembly grooves. A threaded hole 2 is provided in the middle of the humerus adapter plate. The threaded hole 2 is aligned with the center line of the threaded hole 1, and both are engaged with a bolt 1. The humerus adapter plate is fixedly connected to the support handle through the bolt 1. Arc-shaped grooves are provided on both sides of the top of the humerus pad. Multiple bolts 2 are provided on the inner walls of the arc-shaped grooves, and the bolts 2 can be used in cooperation with the nut sleeves.

7. The shoulder joint prosthesis without a trial mold having a microporous tantalum coating according to claim 6, wherein A sealing straight bar is fixedly installed on the inner wall of the middle of the sealing cover, and the sealing straight bar is hermetically clamped with the inner adjustment slide rail. A cut can be cut out on the sealing straight bar, and the cut is hermetically matched with the outer wall of the slide seat. Sealing arc-shaped bars are fixedly installed on both sides of the inner wall of the bottom of the sealing cover, and the sealing arc-shaped bars are hermetically clamped with the arc-shaped grooves. The sealing cover is clamped with the outer wall of the humerus pad.

8. The shoulder joint prosthesis without a trial mold having a microporous tantalum coating according to claim 1, characterized in that, The matching assembly includes a positioning plate. A threaded hole 4 is provided in the middle of the positioning plate. The threaded hole 4 is aligned with the center line of the threaded hole 3, and both are engaged with a bolt 3. The positioning plate is fixedly connected to the slide seat through the bolt 3. An elastic clamping groove is provided on the top surface of the positioning plate. An inner clamping plate is clamped in the elastic clamping groove. A spherical socket is provided on the top of the inner clamping plate, and the spherical socket is used in cooperation with the glenoid spherical prosthesis.

Images