Die-testing-free shoulder joint prosthesis with micropore tantalum coating and installation method of die-testing-free shoulder joint prosthesis

Abstract

The invention provides a mold-testing-free shoulder joint prosthesis with a micropore tantalum coating and an installation method of the mold-testing-free shoulder joint prosthesis, and belongs to the technical field of medical instruments. Comprising a limiting type humerus prosthesis mechanism and a shoulder glenoid spherical prosthesis, the limiting type humerus prosthesis mechanism comprises a humerus handle body, a reference table is arranged at the top of the humerus handle body, a humerus adaptive disc is connected to the top of the reference table, a position correcting assembly is installed in the humerus adaptive disc, a sealing cover is connected to the top of the position correcting assembly, and the limiting type humerus prosthesis mechanism is connected with the shoulder glenoid spherical prosthesis. And a matching assembly is mounted on the top surface of the sealing cover. According to the humerus handle prosthesis, the humerus handle body, the inner handle body and the supporting handle are arranged to replace existing specification type humerus handle prostheses of multiple types, meanwhile, the orientation of a ball socket on the inner buckling disc is changed through the position correcting assembly so that the humerus handle prosthesis can adapt to shoulder glenoid spherical prostheses of different angles, and the problems that an existing humerus handle prosthesis is poor in universality, and the humerus burden of a patient is increased are solved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a trial-mold-free shoulder joint prosthesis with a microporous tantalum coating and a mounting method thereof. Background Art

[0002] Shoulder prosthesis is a complete shoulder joint system, including two series: non-constrained shoulder prosthesis (half shoulder and normal shoulder) and constrained shoulder prosthesis (reverse shoulder). In each series, various types of humeral stem prostheses can be provided, such as: bone cement fixed primary replacement type, non-bone cement fixed primary replacement type, bone cement fixed revision long stem and fracture type humeral stem designed for proximal humeral fractures.

[0003] Existing humeral stem prostheses all adopt a platform design, to which a non-restrictive shoulder prosthesis and a restrictive shoulder prosthesis can be connected on the top, allowing doctors to perform conversions between normal shoulder and reverse shoulder while retaining the humeral stem. They are cast in one piece using titanium alloy material, so they are heavy and put a greater burden on the patient's humerus. At the same time, they will damage the muscles at the connection during exercise.

[0004] Since the relative positions of the superior articular head of the humerus and the superior glenoid cavity of the scapula are different in different patients, a trial mold of the humerus is required during shoulder replacement surgery. The purpose of the trial mold is to pre-install the joint, facilitate the selection of the appropriate model of humeral stem prosthesis, and adjust the angle, which reduces the efficiency of the operation, increases the cost of using the humeral stem prosthesis, and cannot achieve anatomical reconstruction of the proximal humerus; therefore, the present application provides a trial mold-free shoulder joint prosthesis with a microporous tantalum coating and an installation method thereof to meet the needs. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a trial mold-free shoulder joint prosthesis with a microporous tantalum coating and an installation method thereof. By providing a humeral stem body, an inner stem body and a support handle to replace the existing standardized multi-type humeral stem prostheses, a positioning component is used to change the orientation of the ball socket on the inner buckle plate to adapt to glenosphere prostheses of different angles, so as to solve the problem that the existing humeral stem prosthesis has poor versatility and increases the burden on the patient's humerus.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A trial mold-free shoulder joint prosthesis with a microporous tantalum coating comprises a restrictive humeral prosthesis mechanism and a glenosphere prosthesis, wherein the restrictive humeral prosthesis mechanism comprises a humeral handle body, a reference platform is provided on the top of the humeral handle body, a humeral adapter plate is connected to the top of the reference platform, a positioning assembly is installed inside the humeral adapter plate, a sealing cover is connected to the top of the positioning assembly, and a matching assembly is installed on the top surface of the sealing cover; the positioning assembly comprises 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 on the top of the slide seat, the bottom surface and the top surface of the humeral pad are respectively set as the main base surface and the secondary base surface, the main base surface and the secondary base surface are both circular, and the perpendicular bisectors perpendicular to the center of the circle do not overlap.

[0008] Optionally, a fixing seat is inserted into the inner wall of the outer end of the inner adjusting slide rail, and the fixing seat and the inner wall of the inner adjusting slide rail are both provided with receiving holes, and sleeves are fixedly installed on the inner walls of the two groups of receiving holes, and the inner walls of the two groups of sleeves are rotatably connected to the same screw, and the slide seat is meshed with the screw.

[0009] Optionally, a cross slot is provided at the top of the humeral handle body, an inner handle body is provided at the top of the humeral handle body, a corrugated groove is provided on the outer wall of the bottom of the inner handle body, a cross seat is fixedly installed at the bottom of the inner handle body, and the cross seat is plugged into the cross slot, a socket one is provided on the outer wall of the top of the humeral handle body, and the socket one passes through the cross seat, a plurality of sockets one are provided and distributed on the peripheral wall of the top of the humeral handle body, a plurality of groups of the inner walls of the sockets one are all plugged with a column one, and the cross seat is fixedly connected to the humeral handle body through the column one.

[0010] Optionally, a straight-line bayonet is provided on the top of the inner handle body, and socket two is provided at the four corners of the inner walls on both sides of the straight-line bayonet, and the socket two passes through the side wall of the inner handle body. A support handle is clamped on the inner wall of the straight-line bayonet, and a socket three is provided at the bottom of the support handle. The socket three is used in conjunction with the corresponding socket two, and the same plug post two is plugged in. The support handle is fixedly connected to the inner handle body through multiple groups of plug posts two.

[0011] Optionally, a bone fixing groove is provided in the middle portion of the support handle, positioning frame grooves are provided on both side walls of the middle portion of the support handle, and the positioning frame groove coincides with the midline of the bone fixing groove, an external bone fixing block is inserted into the inner wall of the bone fixing groove, a left positioning frame is fixedly installed on the external bone fixing block, the left positioning frame engages with the positioning frame groove on the left side, a right positioning frame is sleeved on the external bone fixing block, and the right positioning frame engages with the positioning frame groove on the right side, and 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 handle body and the outer wall of the support handle are coated with a microporous tantalum coating, and the microporous tantalum coating wraps the top of the humeral handle body, the inner handle body, the support handle and the external fixed bone block. The external fixed bone block is fixed to the patient's humerus by external screws, the top of the microporous tantalum coating is fixedly connected to the bottom surface of the reference platform, the top of the support handle passes through the reference platform, and the top surface of the support handle is flush with the top surface of the reference platform.

[0013] Optionally, a threaded hole 1 is provided in the middle of the top surface of the support handle, and an inner assembly groove is provided on the inner wall of the humeral adapter plate. The inner assembly grooves are provided in multiple groups and are arranged in a circular 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 humeral adapter plate. The threaded hole 2 is aligned with the center line of the threaded hole 1, and both are engaged with bolt 1. The humeral adapter plate is fixedly connected to the support handle by bolt 1. Arc grooves are provided on both sides of the top of the humeral pad, and multiple groups of bolts 2 are provided on the inner walls of the arc grooves, and bolts 2 can be used in conjunction with nut sleeves.

[0014] Optionally, a sealing straight strip is fixedly installed on the inner wall in the middle of the sealing cover, and the sealing straight strip is sealingly engaged with the inner adjustment slide rail, a notch can be cut on the sealing straight strip, and the notch is sealingly engaged with the outer wall of the slide seat, and sealing arc strips are fixedly installed on the inner walls on both sides of the bottom of the sealing cover, and the sealing arc strip is sealingly engaged with the arc groove, and the sealing cover is engaged with the outer wall of the humeral pad.

[0015] Optionally, the mating component includes a positioning plate, a threaded hole four is provided in the middle of the positioning plate, the threaded hole four is aligned with the center line of the threaded hole three, and both are engaged with bolt three, the positioning plate is fixedly connected to the sliding seat by bolt three, an elastic slot is provided on the top surface of the positioning plate, an inner buckle plate is clamped in the elastic slot, a ball socket is provided on the top of the inner buckle plate, and the ball socket is used in conjunction with the glenosphere prosthesis.

[0016] The present application also provides another technical solution: a method for installing a trial-mold-free shoulder joint prosthesis with a microporous tantalum coating, comprising the following steps:

[0017] S1: insert the cross seat at the bottom of the inner handle body into the cross slot, and complete the installation of the humeral handle body and the inner handle body by driving the first plug post into the first plug hole, then insert the support handle into the slot, and then drive the second plug post to complete the installation of the support handle, and then insert the external bone block into the bone groove, and complete the fixation of the external bone block through the left positioning frame and the right positioning frame;

[0018] S2: After the humeral stem body, the inner stem body, the support stem and the external bone block are installed, 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, 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, and a reference platform is installed on the top of the support stem;

[0019] S3: The articular head at the top of the patient's humerus is removed through external surgery, the top of the humerus is ground and drilled, and then the humeral stem is installed into the humerus. At the same time, screws are driven in to fix the whole formed in S2 to the humerus.

[0020] S4: The humeral adapter plate is mounted on the top of the support handle by bolt 1, and then the bottom of the humeral liner is inserted into the humeral adapter plate. According to the position of the upper articular head of the patient's humerus and the upper glenoid of the scapula, the humeral liner is rotated so that the main base surface rotates in the humeral adapter plate. Since the center of the main base surface and the secondary base surface are different, the position of the midpoint perpendicular line on the secondary base surface will also change with the rotation of the main base surface. When the secondary base surface is most suitable for the patient's shoulder joint movement, the rotation of the main base surface is stopped, and bolt 2 is driven into the nut sleeve through the arc groove to complete the installation of the humeral liner.

[0021] S5: After the humeral pad is installed in the humeral adapter plate, the screw rod is rotated by a screwdriver to make the screw rod engage with the slide seat, thereby changing the position of the slide seat so that the slide seat coincides with the mid-perpendicular line from the base surface. Thereafter, the sealing strip is cut according to the position of the slide seat to determine the position of the cut, and finally the sealing cover is installed on the top of the humeral pad to prevent blood from entering the humeral pad;

[0022] S6: Install the positioning plate onto the slide seat through bolt three, and press the inner buckle plate to snap it into the positioning plate, thereby completing the installation of the inner buckle plate. After that, trim the glenoid cavity and drill a hole, install the glenosphere prosthesis into the glenoid cavity, and trim the tissues around the joint to increase the joint movement space, so that the glenosphere head on the glenosphere prosthesis can rotate in the ball socket, thereby completing the installation of the patient's shoulder joint prosthesis.

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

[0024] In the above scheme, a humeral handle body, an inner handle body and a support handle are provided to replace the existing standardized multi-type humeral handle prostheses. The humeral handle body assembly is assembled with a split structure, and the humeral handle body uses a carbon fiber reinforced epoxy resin composite material, which has an elastic modulus equivalent to that of human bones, does not cause stress shielding problems, can prevent the artificial prosthesis from loosening, and extend the service life of the prosthesis. Without reducing the supporting strength of the humeral handle body, it is more in line with lightweight design, optimizes the overall volume of the humeral handle body, and the split structure can reduce maintenance costs. Without reducing the supporting strength of the humeral handle body, it is more in line with lightweight design, optimizes the overall volume of the humeral handle body, and the split structure can reduce maintenance costs. At the same time, the connection is wrapped with a microporous tantalum coating, which not only prevents the internal connector from damaging the bone, but also promotes the growth of the humeral handle body assembly and the bone.

[0025] After the bottom of the humeral pad is installed in the humeral adapter plate, due to the different centers of the main base surface and the secondary base surface, the position of the perpendicular line on the secondary base surface will change when the humeral pad is rotated. By changing the position of the slide seat so that it is always located on the perpendicular line of the secondary base surface, it is ensured that the matching component can perfectly match the glenosphere prosthesis, avoiding the need for trial molding before installing the humeral stem body. The humeral stem body of this invention can be used to install a variety of reverse shoulder shoulder joint prostheses. At the same time, the ball and socket at the top of the proximal humerus can be adjusted at multiple angles, thereby realizing anatomical reconstruction of the proximal humerus. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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.

[0027] Figure 1 A schematic diagram of the three-dimensional structure of a trial-mold-free shoulder joint prosthesis with a microporous tantalum coating;

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

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

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

[0031] Figure 5 The figure is a structural diagram of the installation of the support handle and the external bone block;

[0032] Figure 6 This is a diagram of the installation structure of various components on the humeral handle;

[0033] Figure 7 To match the installation position diagram of the components;

[0034] Figure 8 This is the installation location diagram of the calibration component;

[0035] Fig. 9 The figure is a schematic diagram of the installation of the humeral adapter plate;

[0036] Fig.10 A bottom-up stereoscopic view of the humeral adapter plate;

[0037] Fig.11 It is a three-dimensional structural schematic diagram of the calibration component;

[0038] Fig.12 This is a three-dimensional exploded view of the calibration component;

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

[0040] Fig.14 It is the position diagram of the main base surface and the secondary base surface;

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

[0042] Fig.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 is a detailed description of a trial-mold-free shoulder joint prosthesis with a microporous tantalum coating and a method for installing the same 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 alternatives 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.

[0047] like Figures 1 to 16 As shown, an embodiment of the present invention provides a trial mold-free shoulder joint prosthesis with a microporous tantalum coating, including a restrictive humeral prosthesis mechanism 100 and a glenosphere prosthesis 300. The restrictive humeral prosthesis mechanism 100 includes a humeral stem body 110. A reference platform 140 is provided on the top of the humeral stem body 110. A humeral adapter plate 150 is connected to the top of the reference platform 140. A positioning assembly 160 is installed inside the humeral adapter plate 150. A sealing cover 190 is connected to the top of the positioning assembly 160. A mating assembly 200 is installed on the top surface of the sealing cover 190.

[0048] The alignment assembly 160 includes a humeral pad 161, an inner adjustment 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 rail 164, the slide seat 169 can slide in the inner adjustment rail 164, a threaded hole 3 170 is provided on the top of the slide seat 169, the bottom surface and the top surface of the humeral pad 161 are respectively set as a main base surface 180 and a secondary base surface 181, both of which are circular and perpendicular to the The perpendicular bisectors of the centers of the circles do not coincide. In the present invention, after the bottom of the humeral pad 161 is installed in 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 169 so that it is always located on the perpendicular bisector of the secondary base surface 181, it is ensured that the mating component 200 can perfectly match with the glenosphere prosthesis 300.

[0049] like Fig.11 and Fig.12As shown, the inner wall of the outer end of the inner adjusting slide 164 is plugged with a fixing seat 166, and the fixing seat 166 is used to limit the movement of the slide 169. The fixing seat 166 and the inner wall of the inner adjusting slide 164 are provided with receiving holes 165, and the inner walls of the two groups of receiving holes 165 are fixedly installed with sleeves 167. The inner walls of the two groups of sleeves 167 are rotatably connected with the same screw 168, and the slide 169 is meshed with the screw 168. In the present application, after the slide 169 is matched with the screw 168, the screw 168 is inserted into the sleeve 167 inside the inner adjusting slide 164. At this time, , the slide 169 is located in the inner adjusting slide rail 164, and then the fixing seat 166 is inserted into the outer end wall of the inner adjusting slide rail 164 to complete the assembly of the humeral pad 161. In particular, when the base surface 181 is most suitable for the patient's shoulder joint movement, the bolt 163 is driven into the nut sleeve 152 through the arc groove 162 to complete the installation of the humeral pad 161. Thereafter, the screw 168 is rotated by a screwdriver to make the screw 168 engage with the slide 169, thereby changing the position of the slide 169 so that the slide 169 coincides with the perpendicular line from the base surface 181.

[0050] like Figures 4 to 7 As shown, a cross slot 111 is provided at the top of the humeral handle body 110, an inner handle body 112 is provided at the top of the humeral handle body 110, a corrugated flower groove 113 is provided on the outer wall of the bottom of the inner handle body 112, the corrugated flower groove 113 can increase the contact surface with the microporous tantalum coating 130 to prevent the microporous tantalum coating 130 from falling off, a cross seat 114 is fixedly installed at the bottom of the inner handle body 112, and the cross seat 114 is plugged into the cross slot 111, the inner handle body 112 and the cross seat 114 are both made of continuous carbon fiber reinforced polyetheretherketone (PEEK) high-performance thermoplastic composite material, a socket 115 is provided on the outer wall of the top of the humeral handle body 110, and the socket 115 115 passes through the cross seat 114, and there are multiple groups of sockets 115 distributed on the top peripheral wall of the humeral handle body 110. The inner walls of the multiple groups of sockets 115 are all plugged with plug posts 116. The cross seat 114 is fixedly connected to the humeral handle body 110 through the plug posts 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 the modulus is closer to the bone modulus. It is not easy to break the plate during the postoperative recovery process. It has extremely high resistance to wear, corrosion and fracture, is more resistant to high temperatures than traditional carbon fiber reinforced thermosetting composite materials, has higher strength, and improves 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, the outer wall of the humeral handle body 110 and the outer wall of the support handle 120 are coated with a microporous tantalum coating 130. The microporous tantalum coating 130 and the human skeleton will grow together for a shorter time. The microporous tantalum coating 130 wraps the outer wall of the humeral handle body 110, the inner handle body 112, the support handle 120 and the external fixed bone block 125. The external fixed bone 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 passes through the reference platform 140, and the support handle 1 The top surface 20 is flush with the top surface of the reference platform 140. In the present invention, the microporous tantalum coating 130 can wrap the connection between the support handle 120 and the inner handle body 112, and the inner handle body 112 and the humeral handle body 110, to prevent the internal connectors from damaging the bone, while promoting the growth of the humeral handle body 110 assembly and the bone, thereby enhancing the corrosion resistance and biocompatibility of the prosthesis, and having high strength and wear resistance, and having a stronger adhesion effect on human cells, thereby creating good conditions for the growth and proliferation of bone cells, and achieving the effect of long-term stability and extended service life.

[0054] like Fig. 9 and Fig.10 As shown, a threaded hole 124 is provided in the middle of the top surface of the support handle 120, an inner assembly groove 151 is provided on the inner wall of the humeral adapter plate 150, and a plurality of inner assembly grooves 151 are provided and arranged in a circular array, and a nut sleeve 152 is fixedly installed on the inner walls of the plurality of inner assembly grooves 151, a threaded hole 153 is provided in the middle of the humeral adapter plate 150, the threaded hole 153 is aligned with the center line of the threaded hole 124, and both are engaged with a bolt 154, the humeral adapter plate 150 is fixedly connected to the support handle 120 by the bolt 154, arc grooves 162 are provided on both sides of the top of the humeral pad 161, a plurality of groups of bolts 163 are provided on the inner wall of the arc groove 162, and the bolts 163 can be used in conjunction with the nut sleeve 152. , the humeral adapter plate 150 is installed on the top of the support handle 120 by means of bolt 154, and thereafter, the bottom of the humeral liner 161 is inserted into the humeral adapter plate 150, and the humeral liner 161 is rotated according to the position of the patient's humeral upper articular head and the scapula upper glenoid cavity, so that the main base surface 180 rotates in the humeral adapter plate 150. Since the center of the main base surface 180 and the secondary base surface 181 are different, the position of the perpendicular midline on the secondary base surface 181 will also change with the rotation of the main base surface 180. When the secondary base surface 181 is most suitable for the patient's shoulder joint movement, the rotation of the main base surface 180 is stopped, and bolt 2 163 is driven into the nut sleeve 152 through the arc groove 162, thereby completing the installation of the humeral liner 161.

[0055] like Fig.13As shown, a sealing strip 191 is fixedly installed on the inner wall of the middle part of the sealing cover 190, and the sealing strip 191 is sealingly engaged with the inner adjusting slide rail 164, a notch 192 can be cut out on the sealing strip 191, and the notch 192 is sealingly engaged with the outer wall of the slide seat 169, and sealing arc strips 193 are fixedly installed on the inner walls on both sides of the bottom of the sealing cover 190, and the sealing arc strip 193 is sealingly engaged with the arc groove 162. In the present invention, the sealing strip 191 is cut according to the position of the slide seat 169 to determine the position of the notch 192, and 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] like Figure 7 , Fig.15 and Fig.16 As shown, the mating component 200 includes a positioning plate 210, which is made of carbon fiber material, has a certain elasticity, and can be snapped into the inner buckle plate 230. A threaded hole 4 212 is opened in the middle of the positioning plate 210, and the threaded hole 4 212 is aligned with the center line of the threaded hole 3 170, and both are engaged with a bolt 3 220. The positioning plate 210 is fixedly connected to the slide seat 169 through the bolt 3 220. An elastic groove 211 is opened on the top surface of the positioning plate 210, and the inner buckle plate 230 is snapped in the elastic groove 211. A ball socket 240 is opened on the top of the inner buckle plate 230. The positioning plate 210 and the inner buckle plate 230 are made of continuous carbon fiber reinforced polyetheretherketone (PEEK) high-performance thermoplastic composite material. The strength of carbon fiber reinforced PEEK exceeds that of titanium alloy, and has extremely high resistance to wear, corrosion and fracture, which is better than traditional carbon fiber. The reinforced thermosetting composite material is more resistant to high temperatures and has higher strength, which improves the stability of the connection between the positioning plate 210 and the inner buckle plate 230. The ball socket 240 is used in conjunction with the glenosphere prosthesis 300. The glenosphere prosthesis 300 is mainly composed of a glenosphere fixing plate and a glenosphere head, and the glenosphere head is fixed to the glenosphere fixing plate by screws. In the present invention, the positioning plate 210 is installed on the slide seat 169 by bolt three 220, and the inner buckle plate 230 is pressed to snap it into the positioning plate 210, thereby completing the installation of the inner buckle plate 230. Thereafter, the glenoid cavity is trimmed and a hole is drilled, the glenosphere prosthesis 300 is installed in the glenoid cavity, and the tissues around the joint are trimmed to increase the joint activity space, so that the glenosphere head on the glenosphere prosthesis 300 can rotate in the ball socket 240, thereby completing the installation of the patient's shoulder joint prosthesis.

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

[0058] The cross seat 114 at the bottom of the inner handle body 112 is inserted into the cross slot 111, and the humeral handle body 110 and the inner handle body 112 are installed by driving the plug 116 into the socket 115. Then, the support handle 120 is inserted into the slot 117, and then the plug 2 128 is driven to complete the installation of the support handle 120. Then, 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. The humeral handle body 110, the inner handle body 112, the support handle 120 and the external bone block 125 are fixed. 25 After the installation is completed, a microporous tantalum coating 130 is ion-sprayed on the top surface of the humeral stem 110, which enhances the corrosion resistance and biocompatibility of the prosthesis, and has high strength and wear resistance, and has a stronger adhesion to human cells, creating good conditions for the growth and proliferation of bone cells, achieving long-term stability and extending the service life, so that a microporous tantalum coating 130 is formed on the top of the humeral stem 110, and the microporous tantalum coating 130 wraps the top of the humeral stem 110, the inner stem 112, the support stem 120 and the external bone block 125, and a reference platform 140 is installed on the top of the support stem 120.

[0059] The articular head at the top of the patient's humerus is removed through external surgery, the top of the humerus is ground and drilled, and then the humeral handle body 110 is installed in the humerus. At the same time, the humeral handle body 110 assembly is fixed to the humerus by driving screws, and the humeral adapter plate 150 is installed on the top of the support handle 120 by bolt 154. Thereafter, the bottom of the humeral pad 161 is inserted into the humeral adapter plate 150, and the humeral pad 161 is rotated according to the position of the articular head on the patient's humerus and the glenoid cavity on the scapula, so that the main base surface 180 rotates in the humeral adapter plate 150. Since the center 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 midpoint perpendicular line on the secondary base surface 181 will also change. When the base surface 181 is most suitable for the patient's shoulder joint movement, the rotation of the main base surface 180 is stopped, and the bolt 163 is driven into the nut sleeve 152 through the arc groove 162 to complete the installation of the humeral pad 161. After the humeral pad 161 is installed in the humeral adapter plate 150, the screw 168 is rotated by a screwdriver to make the screw 168 engage with the slide 169, thereby changing the position of the slide 169 so that the slide 169 coincides with the perpendicular line of the base surface 181. Thereafter, the sealing strip 191 is cut according to the position of the slide 169 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.

[0060] The positioning plate 210 is installed on the slide seat 169 by means of bolt three 220, and the inner buckle plate 230 is pressed to snap it into the positioning plate 210, thereby completing the installation of the inner buckle plate 230. Thereafter, the glenoid cavity is trimmed and a hole is drilled, the glenosphere prosthesis 300 is installed into the glenoid cavity, and the tissues around the joint are trimmed to increase the joint movement space, so that the glenosphere head on the glenosphere prosthesis 300 can rotate in the socket 240, thereby completing the installation of the patient's shoulder joint prosthesis.

[0061] 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.

[0062] 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 trial-mold-free shoulder joint prosthesis with a microporous tantalum coating, comprising a constrained humeral prosthesis mechanism and a glenosphere prosthesis, characterized in that: The restrictive humeral prosthesis mechanism comprises a humeral handle body, a reference platform is provided on the top of the humeral handle body, a humeral adapter plate is connected to the top of the reference platform, a positioning component is installed inside the humeral adapter plate, a sealing cover is connected to the top of the positioning component, and a matching component is installed on the top surface of the sealing cover; The alignment component includes a humeral pad, an inner adjustment 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 rail, a threaded hole three is provided on the top of the sliding seat, the bottom surface and the top surface of the humeral pad are respectively set as the main base surface and the secondary base surface, the main base surface and the secondary base surface are both circular, and the bisectors perpendicular to the center of the circle do not overlap.

2. The trial-mold-free shoulder joint prosthesis with microporous tantalum coating according to claim 1, characterized in that: A fixing seat is inserted into the inner wall of the outer end of the inner adjusting slide rail, and the fixing seat and the inner wall of the inner adjusting slide rail are both provided with receiving holes. Sleeves are fixedly installed on the inner walls of the two groups of receiving holes. The inner walls of the two groups of sleeves are rotatably connected to the same screw rod, and the slide seat is meshed with the screw rod.

3. The trial-free shoulder joint prosthesis with microporous tantalum coating according to claim 2, characterized in that: A cross slot is provided on the top of the humeral handle body, an inner handle body is provided on the top of the humeral handle body, a corrugated groove is provided on the outer wall of the bottom of the inner handle body, a cross seat is fixedly installed on the bottom of the inner handle body, and the cross seat is plugged into the cross slot, a socket one is provided on the outer wall of the top of the humeral handle body, and the socket one passes through the cross seat, a plurality of sockets one are provided and distributed on the peripheral wall of the top of the humeral handle body, a plurality of groups of the inner walls of the sockets one are all plugged with a column one, and the cross seat is fixedly connected to the humeral handle body through the column one.

4. The trial-free shoulder joint prosthesis with microporous tantalum coating according to claim 3, characterized in that: The top of the inner handle body is provided with a slot, and four corners of the inner walls on both sides of the slot are provided with two insertion holes, and the two insertion holes penetrate the side walls of the inner handle body. The inner wall of the slot is clamped with a support handle, and the bottom of the support handle is provided with a three insertion hole, which is used in conjunction with the corresponding two insertion holes and is plugged with the same two insertion posts. The support handle is fixedly connected to the inner handle body through multiple groups of two insertion posts.

5. The trial-mold-free shoulder joint prosthesis with microporous tantalum coating according to claim 4, characterized in that: A bone fixing groove is provided in the middle part of the support handle, and positioning frame grooves are provided on both side walls of the middle part of the support handle, and the positioning frame groove coincides with the midline of the bone fixing groove, an external bone fixing block is inserted into the inner wall of the bone fixing groove, a left positioning frame is fixedly installed on the external bone fixing block, the left positioning frame is engaged with the positioning frame groove on the left side, a right positioning frame is sleeved on the external bone fixing block, and the right positioning frame is engaged with the positioning frame groove on the right side, and the left positioning frame and the right positioning frame are fixedly connected to the support handle by screws.

6. The trial-free shoulder joint prosthesis with microporous tantalum coating according to claim 5, characterized in that: The top of the humeral handle body and the outer wall of the support handle are coated with a microporous tantalum coating, and the microporous tantalum coating wraps the top of the humeral handle body, the inner handle body, the support handle and the external fixed bone block. The external fixed bone block is fixed to the patient's humerus by 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 handle passes through the reference platform, and the top surface of the support handle is flush with the top surface of the reference platform.

7. The trial-free shoulder joint prosthesis with microporous tantalum coating according to claim 4, characterized in that: A threaded hole 1 is provided in the middle of the top surface of the support handle, and an inner assembly groove is provided on the inner wall of the humeral adapter plate. There are multiple groups of inner assembly grooves, which are arranged in a circular 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 humeral adapter plate. The threaded hole 2 is aligned with the center line of the threaded hole 1, and both are engaged with bolt 1. The humeral adapter plate is fixedly connected to the support handle through bolt 1. Arc grooves are provided on both sides of the top of the humeral pad, and multiple groups of bolts 2 are provided on the inner walls of the arc grooves, and the bolts 2 can be used in conjunction with the nut sleeve.

8. The trial-free shoulder joint prosthesis with microporous tantalum coating according to claim 7, characterized in that: A sealing straight strip is fixedly installed on the inner wall in the middle of the sealing cover, and the sealing straight strip is sealingly engaged with the inner adjusting slide rail. A notch can be cut on the sealing straight strip, and the notch is sealingly engaged with the outer wall of the slide seat. Sealing arc strips are fixedly installed on the inner walls on both sides of the bottom of the sealing cover, and the sealing arc strips are sealingly engaged with the arc groove, and the sealing cover is engaged with the outer wall of the humeral pad.

9. The trial-mold-free shoulder joint prosthesis with microporous tantalum coating according to claim 1, characterized in that: The mating component includes a positioning plate, a threaded hole four is opened in the middle of the positioning plate, the threaded hole four is aligned with the center line of the threaded hole three, and both are engaged with bolt three, the positioning plate is fixedly connected to the sliding seat by bolt three, the top surface of the positioning plate is opened with an elastic slot, an inner buckle plate is clamped in the elastic slot, and a ball socket is opened on the top of the inner buckle plate, and the ball socket is used in conjunction with the glenosphere prosthesis.

10. The method for installing a trial-mold-free shoulder joint prosthesis with a microporous tantalum coating according to any one of claims 1 to 9, characterized in that: The following installation steps are also included: S1: insert the cross seat at the bottom of the inner handle body into the cross slot, and complete the installation of the humeral handle body and the inner handle body by driving the first plug post into the first plug hole, then insert the support handle into the slot, and then drive the second plug post to complete the installation of the support handle, and then insert the external bone block into the bone groove, and complete the fixation of the external bone block through the left positioning frame and the right positioning frame; S2: After the humeral stem body, the inner stem body, the support stem and the external bone block are installed, 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, 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, and a reference platform is installed on the top of the support stem; S3: The articular head at the top of the patient's humerus is removed through external surgery, the top of the humerus is ground and drilled, and then the humeral stem is installed into the humerus. At the same time, screws are driven in to fix the whole formed in S2 to the humerus. S4: The humeral adapter plate is mounted on the top of the support handle by bolt 1, and then the bottom of the humeral liner is inserted into the humeral adapter plate. According to the position of the upper articular head of the patient's humerus and the upper glenoid of the scapula, the humeral liner is rotated so that the main base surface rotates in the humeral adapter plate. Since the center of the main base surface and the secondary base surface are different, the position of the midpoint perpendicular line on the secondary base surface will also change with the rotation of the main base surface. When the secondary base surface is most suitable for the patient's shoulder joint movement, the rotation of the main base surface is stopped, and bolt 2 is driven into the nut sleeve through the arc groove to complete the installation of the humeral liner. S5: After the humeral pad is installed in the humeral adapter plate, the screw rod is rotated by a screwdriver to make the screw rod engage with the slide seat, thereby changing the position of the slide seat so that the slide seat coincides with the mid-perpendicular line from the base surface. Thereafter, the sealing strip is cut according to the position of the slide seat to determine the position of the cut, and finally the sealing cover is installed on the top of the humeral pad to prevent blood from entering the humeral pad; S6: Install the positioning plate onto the slide seat through bolt three, and press the inner buckle plate to snap it into the positioning plate, thereby completing the installation of the inner buckle plate. After that, trim the glenoid cavity and drill a hole, install the glenosphere prosthesis into the glenoid cavity, and trim the tissues around the joint to increase the joint movement space, so that the glenosphere head on the glenosphere prosthesis can rotate in the ball socket, thereby completing the installation of the patient's shoulder joint prosthesis.

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