CN120420136B - An intraosseous total ankle prosthesis system - Google Patents

Abstract

The invention provides an intraosseous total ankle joint prosthesis system, and belongs to the technical field of ankle joint prostheses. The artificial ankle joint prosthesis comprises a tibia component, a backbone supporting component used for enhancing intramedullary stability, wherein the backbone supporting component is arranged at the top of the tibia component, a polyethylene gasket and a clamping component, the polyethylene gasket is fixedly connected with the tibia component through the clamping component, a chamfer is cut on a talus, the chamfer is rotationally connected with the bottom of the polyethylene gasket, a first fixing component and a second fixing component are used for improving the stability of the artificial ankle joint prosthesis, and the first fixing component comprises a feeding hole, a first runner, a filling runner and a second runner which are circularly arranged in the tibia component at equal intervals. The invention reduces the burden of patients during walking and standing after operation through the lightweight prosthesis design, reduces the pain caused by overlarge load and reduces the abrasion of the prosthesis, thereby being beneficial to the patients to actively develop rehabilitation training, accelerating the rehabilitation process and reducing the probability of secondary operation.

Description

Intra-osseous total ankle joint prosthesis system

Technical Field

The invention relates to the technical field of ankle joint prostheses, in particular to an intraosseous total ankle joint prosthesis system.

Background

The ankle joint is an important weight-bearing and exercise hub for the human body, and plays an indispensable role in activities such as daily walking, running, jumping, and the like. However, the ankle joint is extremely susceptible to attack by a variety of factors, resulting in impaired function. Wounds, such as high falls, fractures caused by traffic accidents, joint erosion caused by rheumatoid arthritis, and degeneration of articular cartilage caused by osteoarthritis, can seriously affect the normal life and mobility of the patient. When conservative treatment means such as medication, physical therapy, etc. cannot effectively relieve symptoms, total ankle replacement becomes an important medical means for improving the quality of life of patients.

At present, the fixation is realized by adopting a mode of matching the fixation nails with the filling bone cement when the whole prosthesis system is fixed. However, the structural design of the existing prosthesis is difficult to ensure that bone cement is fully and uniformly distributed between the prosthesis and bones. The fixing strength between the prosthesis and the bone is reduced, so that the prosthesis is easy to loose and shift in the long-term use process, further the operation is failed, the fusion of the bone tissue and the prosthesis is influenced, and the recovery period of a patient is prolonged.

Meanwhile, the existing ankle prosthesis system may cause the whole prosthesis to have a large mass in order to ensure good strength and supporting force. The heavy prosthesis not only increases the burden of the lower limbs of the patient and brings extra pressure for the patient to walk and stand after operation, aggravates arthralgia, but also limits the moving range and flexibility of the patient and influences the rehabilitation enthusiasm of the patient. In addition, the greater weight increases wear and tear on the prosthesis when subjected to movement stresses, shortens the service life of the prosthesis, and may require secondary replacement surgery, giving the patient a double physical and economic burden. Accordingly, there is a need for an intraosseous total ankle prosthesis system that addresses the above-described problems.

Disclosure of Invention

Aiming at the technical problems of uneven filling of bone cement and larger prosthesis quality in the prior art, the invention aims to provide an intraosseous total ankle prosthesis system.

In order to solve the problems, the invention adopts the following technical scheme.

An intra-osseous total ankle prosthesis system comprising:

the diaphysis supporting component is used for enhancing intramedullary stability and is arranged at the top of the tibia component;

The polyethylene gasket is fixedly connected with the tibia component through the clamping component;

The sealing component is used for ensuring that the liquid discharge hole is not filled with bone cement;

a chamfer cut talus rotationally attached to the bottom of the polyethylene spacer;

the utility model provides a first fixed subassembly and second fixed subassembly for improving ankle joint prosthesis stability, first fixed subassembly is circular including the equidistance and sets up inside feed inlet, first runner, filler runner, the second runner of shin bone subassembly, the feed inlet first runner the filler runner with the second runner all communicates each other, the cross-section of feed inlet is loudspeaker shape, the internal diameter of first runner, filler runner, second runner is all less than the internal diameter of feed inlet, the cross section of filler runner is the spiral, the internal diameter of second runner is along being close to backbone supporting component's direction and reducing gradually.

Optionally, the tibia component comprises a tibia tray, one side of the tibia tray is arranged on the matched plate, through holes which are equidistantly distributed and are convenient for tibia nails to pass through are formed in the outer wall of one side of the matched plate, and the first fixing component and the second fixing component are both arranged in the tibia tray.

Optionally, backbone supporting component includes the fretwork support piece, the fretwork support piece is the honeycomb, the equal fixedly connected with plectane in upper and lower both ends of fretwork support piece, fixedly connected with second screw rod on the plectane at fretwork support piece top, fixedly connected with first screw rod on the plectane that is located fretwork support piece bottom, the screw thread groove has been seted up at the top of tibia tray, backbone supporting component passes through the threaded connection between first screw rod and the screw thread groove to be fixed on the top outer wall of tibia tray, three fixedly connected with screw thread sleeve on the plectane that is located fretwork support piece bottom, screw thread sleeve with second screw thread connection.

Optionally, another is located fixedly connected with butt joint on the plectane at fretwork support piece top, the butt joint is bullet head shape, three first ring grooves of group have been seted up from top to bottom to the butt joint, and three groups the internal diameter of first ring groove is from last to the gradual increase down, the chute that the equidistance is circular distribution has been seted up to the circumference outer wall of butt joint, the chute with first ring groove is linked together.

Optionally, the joint subassembly includes fixed connection the locking plate of polyethylene liner top outer wall, the top outer wall fixedly connected with lug of locking plate, interior caulking groove has been seted up at the top of locking plate, the locking groove has been seted up to the bottom outer wall of tibia tray, the locking groove with the locking plate cooperatees, the draw-in groove has been seted up to one side of locking groove, the draw-in groove with the lug cooperatees, locking groove one side inner wall fixedly connected with fixture block, the fixture block with interior caulking groove cooperatees.

Optionally, the drain holes are in equidistant fan-shaped distribution on one side of the tibia tray, the inner diameters of the drain holes gradually increase along the direction away from the second fixing component, and the drain holes are obliquely arranged in the tibia tray.

Optionally, the second fixing component comprises a second circular ring groove formed in the outer wall of the top of the tibial tray, the inner walls of the two sides of the second circular ring groove are fixedly connected with partition plates distributed in an arc shape at equal distances, and the partition plates on the inner walls of the two sides of the second circular ring groove are distributed in a staggered manner.

Optionally, the seal assembly includes seting up the spout on the second ring groove circumference inner wall, the spout with the flowing back hole is linked together, the inside sliding connection of spout has the slide that is used for guaranteeing the flowing back hole is sealed.

Optionally, the bottom inner wall of second ring groove is seted up flutedly, the inside sliding connection of recess has the link plate, the top outer wall fixedly connected with curved post of link plate, curved post keep away from the one end of link plate with slide fixed connection.

Optionally, a spring is fixedly connected to the inner wall of the bottom of the groove, and the top end of the spring is fixedly connected to the outer wall of the bottom of the annular plate.

Compared with the prior art, the technical scheme provided by the invention has at least the following beneficial effects:

In the scheme, through the backbone supporting component, in the process of supporting and fixing the backbone supporting component, through being the tubular hollow supporting piece structure of fretwork honeycomb, can make whole backbone supporting component realize the lightweight when keeping high strength holding power, the weight of shin bone end prosthetic is alleviateed, this has not only reduced the burden of patient's low limbs, the convenience of postoperative activity has been improved, still reduced the prosthetic fatigue wearing and tearing that lead to because of long-term loading, regular hexagon's honeycomb unit can evenly disperse external force simultaneously, make the supporting part be difficult for taking place to warp when bearing great pressure, ensure the stability of prosthetic in long-term use, effectively resist various stresses because of walking, motion etc. and fretwork honeycomb tubular structure provides a large amount of surface area and space, in the operation in-process, can make bone cement fully pack in the space of honeycomb, form mechanical locking, this inseparable combination mode has strengthened the fixed strength between prosthetic and the bone tissue, further improved the prosthetic stability, the risk of loosening has been reduced.

Because the runner in the whole first fixed subassembly adopts the reducing design, makes the feed inlet (be close to the part of shin bone surface) diameter be greater than the diameter of other runners to be convenient for bone tissue grow into fast, the diameter of second runner reduces gradually simultaneously, can effectively guarantee the structural strength of whole passageway, and the packing runner that is located the middle of first runner and the second runner is the spiral, thereby has prolonged the inside filling path of bone cement in shin bone tray, makes the solidification between bone cement and the shin bone tray combine inseparabler.

Through the collaborative work of seal assembly and apopore, effectively avoided bone cement to block up the problem of apopore, in bone cement injection process, bone cement in the second ring groove exerts pressure to the ring plate, ring plate drive curved post and slide decline, when bone cement fills to a certain amount, the lower pressure that its gravity produced offsets with spring elasticity, the slide slides to the apopore below, prevent bone cement entering apopore in filling process, make the patient can discharge the hydrops in the joint smoothly through the apopore after the operation, reduce the infection risk, in addition, the burden when the prosthetic design of lightweight has alleviateed patient's postoperative walking, stand, reduce the pain that causes because of the heavy burden is too big, reduce prosthetic wear, this not only helps the patient to actively develop rehabilitation training, accelerate rehabilitation process, can also reduce the probability of secondary operation.

Drawings

The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments of the present invention and, together with the description, further serve to explain the principles of the invention and to enable a person skilled in the pertinent art to make and use the invention.

FIG. 1 is a schematic diagram of the overall frontal structure of the present invention;

FIG. 2 is an enlarged schematic view of the structure of FIG. 1A according to the present invention;

FIG. 3 is a schematic view of a split construction of a backbone-support assembly according to the present invention;

FIG. 4 is a schematic top view of the overall structure of the present invention;

FIG. 5 is a schematic overall cross-sectional view of the present invention;

FIG. 6 is an enlarged schematic view of the structure of FIG. 5B according to the present invention;

FIG. 7 is an enlarged schematic view of the structure of FIG. 5C according to the present invention;

FIG. 8 is a schematic view of a split structure of a tibial component and a polyethylene liner of the present invention;

FIG. 9 is an enlarged schematic view of the structure of the present invention at D in FIG. 8;

Fig. 10 is a schematic view of the bottom structure of the tibial tray of the present invention.

[ Reference numerals ]

1.A tibial component; 101, a tibial tray, 102, a matching plate, 103 and a through hole;

2. Backbone support assembly, 201, hollow support piece, 202, circular plate, 203, first screw, 204, second screw, 205, threaded sleeve, 206, butt joint, 207, chute, 208, first circular groove, 209, threaded groove;

3.4, chamfering and cutting the talus;

5. a first fixing assembly; 501, a feed inlet, 502, a first runner, 503, a filler runner, 504 and a second runner;

6. the second fixing component comprises a second circular groove 601, a second circular groove 602 and a baffle plate;

7. The locking device comprises a clamping assembly 701, a locking plate 702, a locking groove 703, a convex block 704, an embedded groove 705, a clamping groove 706 and a clamping block;

8. A liquid discharge hole;

9. seal assembly 901, annular plate 902, runner 903, slide plate 904, bent post 905, groove 906, spring.

Specific structures and devices are labeled in the drawings to enable clear implementation of embodiments of the invention, but this is merely illustrative and is not intended to limit the invention to the specific structures, devices and environments that may be modified or adapted by those of ordinary skill in the art, based on the specific needs.

Detailed Description

The invention will now be described in detail with reference to the drawings and to specific embodiments. While the invention has been described herein in detail in order to make the embodiments more detailed, the following embodiments are preferred and can be embodied in other forms as well known to those skilled in the art, and the accompanying drawings are only for the purpose of describing the embodiments more specifically and are not intended to limit the invention to the specific forms disclosed herein.

It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the relevant art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

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

It is to be understood that the meaning of "on," "above," "over" and "above" in the present invention should be read in the broadest manner so that "on" means not only "directly on" but also includes "on" something with intervening features or layers therebetween, and "on" or "above" means not only "on" or "over" but also may include the meaning of "on" or "over" it without intervening features or layers therebetween.

Furthermore, spatially relative terms such as "under," "below," "lower," "above," "upper," and the like may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented and the spatially relative descriptors used herein may similarly be interpreted accordingly.

As shown in fig. 1 to 10, an embodiment of the present invention provides an intraosseous total ankle prosthesis system, which comprises a tibia component 1, a diaphysis supporting component 2 for enhancing intramedullary stability, wherein the diaphysis supporting component 2 is arranged on the top of the tibia component 1, a polyethylene liner 3 and a clamping component 7, and the polyethylene liner 3 is fixedly connected with the tibia component 1 through the clamping component 7.

A drain hole 8, and a sealing assembly 9 for ensuring that the drain hole 8 is not filled with bone cement.

The chamfer cut talus 4 is rotatably connected to the bottom of the polyethylene spacer 3 by the chamfer cut talus 4.

The first fixing component 5 and the second fixing component 6 are used for improving stability of the ankle joint prosthesis, the first fixing component 5 comprises a feeding hole 501, a first flow channel 502, a filler flow channel 503 and a second flow channel 504 which are circularly arranged in the tibia component 1 at equal intervals, the feeding hole 501, the first flow channel 502, the filler flow channel 503 and the second flow channel 504 are mutually communicated, the cross section of the feeding hole 501 is in a horn shape, the inner diameters of the first flow channel 502, the filler flow channel 503 and the second flow channel 504 are smaller than the inner diameter of the feeding hole 501, the cross section of the filler flow channel 503 is spiral, the inner diameter of the second flow channel 504 is gradually reduced along the direction close to the backbone supporting component 2, when bone cement is filled and fixed, the bone cement can leak downwards from the feeding hole 501, along with continuous injection of the bone cement, in the process, the flow channels in the whole first flow channel 502, the filler flow channel 503 and the second flow channel 504 can be effectively filled, and in the process, as the flow channels in the first fixing component 5 adopt a variable-diameter design, the diameter of the feeding hole 501 (namely, the part close to the surface) is larger than the diameters of other flow channels, so that the inner diameters of the bone cement can be more tightly combined with the tibia component 1, and the inner diameter of the second flow channel is more tightly fixed with the tibia component 1, and the bone cement can be gradually reduced, and the bone cement can be effectively combined with the second flow channel 1, and the middle channel is more tightly and the middle.

The tibia component 1 comprises a tibia tray 101, one side of the tibia tray 101 is arranged on a matching plate 102, through holes 103 which are distributed equidistantly and are convenient for tibia nails to pass through are formed in the outer wall of one side of the matching plate 102, the first fixing component 5 and the second fixing component 6 are arranged inside the tibia tray 101, the tibia tray 101 serves as a main body of the tibia component 1 and bears and is connected with other key components, meanwhile, the matching plate 102 and the through holes 103 on the matching plate facilitate the tibia nails to pass through, the tibia component 1 is further fixed on tibia, and the stability of a system is enhanced.

The backbone supporting component 2 comprises a hollowed supporting piece 201, the hollowed supporting piece 201 is in a honeycomb shape, circular plates 202 are fixedly connected to the upper end and the lower end of the hollowed supporting piece 201, a second screw 204 is fixedly connected to the circular plates 202 located at the top of the hollowed supporting piece 201, a first screw 203 is fixedly connected to the circular plates 202 located at the bottom of the hollowed supporting piece 201, a thread groove 209 is formed in the top of the tibial tray 101, the backbone supporting component 2 is fixedly arranged on the outer wall of the top of the tibial tray 101 through the thread connection between the first screw 203 and the thread groove 209, three threaded sleeves 205 are fixedly connected to the circular plates 202 located at the bottom of the hollowed supporting piece 201, the threaded sleeves 205 are in threaded connection with the second screw 204, the hollowed supporting piece 201 is in a honeycomb shape, the weight of the backbone supporting component 2 is reduced while the high-strength supporting force is guaranteed, the burden of a patient lower limb is reduced, fatigue and abrasion of a prosthesis is reduced, meanwhile, the circular plates 202 are connected with the hollowed supporting piece 201 and the first screw 203 and the second screw 204, the backbone supporting component 2 and the tibial tray 101 are firmly connected, and the threaded sleeves 205 are conveniently connected with the thread component 2.

Preferably, another circular plate 202 positioned at the top of the hollowed-out supporting piece 201 is fixedly connected with a butt joint 206, the butt joint 206 is bullet-shaped, three groups of first circular grooves 208 are formed in the butt joint 206 from top to bottom, the inner diameters of the three groups of first circular grooves 208 are gradually increased from top to bottom, the circumferential outer wall of the butt joint 206 is provided with equidistant circular distribution inclined grooves 207, the inclined grooves 207 are communicated with the first circular grooves 208, the bullet-shaped butt joint 206 is convenient to insert into the tibia, the inclined grooves 207 on the surface of the bullet-shaped butt joint 206 and the first circular grooves 208 with different inner diameters increase the contact area with bone cement, so that the bone cement forms a more stable mechanical locking in the filling process, and the fixing strength of the backbone supporting assembly 2 and the tibia is further improved.

The clamping assembly 7 comprises a locking plate 701 fixedly connected to the outer wall of the top of the polyethylene gasket 3, a lug 703 is fixedly connected to the outer wall of the top of the locking plate 701, an embedded groove 704 is formed in the top of the locking plate 701, a locking groove 702 is formed in the outer wall of the bottom of the tibia tray 101, the locking groove 702 is matched with the locking plate 701, a clamping groove 705 is formed in one side of the locking groove 702, the clamping groove 705 is matched with the lug 703, a clamping block 706 is fixedly connected to the inner wall of one side of the locking groove 702, the clamping block 706 is matched with the embedded groove 704, the locking plate 701 at the top of the polyethylene gasket 3 is matched with the locking groove 702 at the bottom of the tibia tray 101, the lug 703 is mutually clamped with the clamping groove 705, the clamping block 706 and the embedded groove 704, and the quick and stable connection of the polyethylene gasket 3 and the tibia assembly 1 are realized, and convenience in installation and replacement are realized.

The liquid draining holes 8 are distributed in a fan-shaped mode at one side of the tibia tray 101 at equal intervals, the inner diameter of the liquid draining holes 8 is gradually increased along the direction away from the second fixing component 6, the liquid draining holes 8 are obliquely arranged in the tibia tray 101, the liquid draining holes 8 are distributed in a fan-shaped mode at equal intervals on one side of the tibia tray 101 and are gradually changed in inner diameter, the liquid draining holes are arranged in an inclined mode, liquid accumulation in joints after operation is facilitated to be discharged, infection caused by liquid accumulation is avoided, and meanwhile the liquid draining holes 8 are prevented from being directly flowed into by inclined design to a certain extent in the filling process.

The second fixing component 6 comprises a second circular groove 601 formed in the outer wall of the top of the tibial tray 101, partition plates 602 distributed in an arc shape are fixedly connected to the inner walls of two sides of the second circular groove 601 at equal intervals, the partition plates 602 on the inner walls of two sides of the second circular groove 601 are distributed in a staggered mode, the contact area between the second circular groove 601 and bone cement is increased, and stability and strength of the whole prosthesis system are further improved after the bone cement is filled in the second circular groove and solidified.

The seal assembly 9 comprises a sliding groove 902 formed in the circumferential inner wall of the second circular groove 601, the sliding groove 902 is communicated with the liquid discharge hole 8, a sliding plate 903 used for guaranteeing the sealing of the liquid discharge hole 8 is slidably connected in the sliding groove 902, the sliding groove 902 is connected with the second circular groove 601 and the liquid discharge hole 8, the sliding plate 903 slides in the sliding groove 902, bone cement is effectively prevented from entering the liquid discharge hole 8 in the bone cement filling process, and the liquid discharge hole 8 is guaranteed to normally exert a liquid discharge function after operation.

The recess 905 has been seted up to the bottom inner wall of second ring groove 601, the inside sliding connection of recess 905 has annular plate 901, annular plate 901's top outer wall fixedly connected with curved post 904, annular plate 901's one end and slide 903 fixed connection are kept away from to curved post 904, after whole false system installation is accomplished, medical personnel first install bone cement syringe on bone cement rifle, later insert the rifle head in the shin treat the position of filling, slowly inject bone cement to the top surface of shin tray 101, because second ring groove 601 is seted up on the surface of shin tray 101, along with the continuous increase of shin tray 101 surface bone cement, can make bone cement flow into second ring groove 601 inside from the surface of shin tray 101, when second ring groove 601 intussuseption is filled with bone cement, along with bone cement constantly pours into in the second ring groove 601, bone cement can drive curved post 904 and slide 903 together to descend when annular plate 901 receives the pressure, when bone cement fills to a certain volume, bone cement is through the elasticity that gravity produced and spring phase spring force looks at this moment, thereby the drain hole that can's the drain 8 stops down to the drain hole is filled with the drain 8 in the slide hole that can's the time, thereby the drain 8 can not be offset the drain 8 in the sealed hole of the side of the cement that can's the sealed hole of the side of the cement is difficult to realize, the drain 8 when the drain 8 is easy to realize, the drain 8 can not be filled down in the sealed hole 8.

The bottom inner wall fixedly connected with spring 906 of recess 905, the top fixed connection of spring 906 is on the bottom outer wall of annular plate 901, and spring 906 provides ascending elasticity for annular plate 901, with the downforce interact of bone cement, the position of accurate control slide 903 ensures that fluid-discharge hole 8 can not be stopped up when bone cement fills, again can normally flowing back at the postoperative.

The working flow of the technical scheme provided by the invention is as follows:

During the use, through the threaded connection between second screw rod 204 and the screw sleeve 205, can carry out effectual equipment with multiunit fretwork subassembly, can insert whole backbone support assembly 2 in patient's shin bone after the equipment is accomplished and realize the installation fixed to full ankle joint prosthetic system, in the in-process that backbone support assembly 2 supported fixedly, through being the tubular fretwork support 201 structures of fretwork honeycomb, can make whole backbone support assembly 2 realized the lightweight when keeping high strength holding power, the weight of shin bone end prosthetic is alleviateed, this has not only reduced the burden of patient's low limbs, the convenience of postoperative activity has been improved, still reduced the prosthetic fatigue wearing and tearing that lead to because of long-term loading, regular hexagon's honeycomb unit can evenly disperse external force simultaneously, make the supporting part be difficult for taking place to warp when bearing great pressure, the stability of prosthetic in long-term use has been ensured, effectively resist the various stresses that produce because of walking, motion etc., and fretwork tubular honeycomb structure has provided a large amount of surface area and space, in the operation process, can make bone cement fully fill in the space of honeycomb tube, form the tight combination mode between the prosthetic bone, the mechanical stability is further improved, the stability between the fixed mode of the prosthetic is further improved.

When the whole prosthesis is installed and filled with bone cement, the bone cement can leak downwards from the feeding hole 501 at the top of the tibial tray 101, and along with continuous injection of the bone cement, the first flow channel 502, the filling flow channel 503 and the second flow channel 504 can be effectively filled, in the process, as the flow channel in the whole first fixing component 5 adopts a variable diameter design, the diameter of the feeding hole 501 (namely, the part close to the surface of the tibia) is larger than that of other flow channels, so that bone tissue can grow in quickly, meanwhile, the diameter of the second flow channel 504 is gradually reduced, the structural strength of the whole channel can be effectively ensured, and the filling flow channel 503 positioned in the middle of the first flow channel 502 and the second flow channel 504 is spiral, so that the filling path of the bone cement in the tibial tray 101 is prolonged, and the solidification combination between the bone cement and the tibial tray 101 is tighter.

Meanwhile, in the process of injecting bone cement into the first fixing component 5, part of the bone cement flows into the second circular groove 601, the bone cement flowing into the second circular groove 601 is combined with the partition boards 602 on the inner walls of the two sides of the second circular groove and solidified, so that the strength of the whole prosthesis system is further improved, the partition boards 602 on the inner walls of the two sides of the second circular groove 601 are distributed in a staggered manner, the bone cement and the partition boards 602 are guaranteed to be fully combined, along with the continuous injection of the bone cement in the second circular groove 601, the bone cement can exert downward pressure on the annular plate 901, when the annular plate 901 is stressed, the bending column 904 and the sliding boards 903 are driven to descend together, and when the bone cement is filled to a certain amount, the downward pressure generated by gravity and the elasticity of the springs 906 cancel each other, so that the annular plate 901 stops descending, and the sliding boards 903 sliding to the lower side of the liquid draining holes 8 cannot realize sealing (the specification of the sliding boards 903 is matched with the specification of the liquid draining holes 8, so that the liquid accumulating liquid in the joint can be conveniently discharged after operation, the infection risk is reduced, and the cement is not filled in the liquid draining holes 8, and the situation that the cement is not blocked up in the liquid draining holes 8 is effectively caused by the cement filling process in the side of the sliding boards 8.

The invention is intended to cover any alternatives, modifications, equivalents, and variations that fall within the spirit and scope of the invention. In the following description of preferred embodiments of the invention, specific details are set forth in order to provide a thorough understanding of the invention, and the invention will be fully understood to those skilled in the art without such details. In other instances, well-known methods, procedures, flows, components, circuits, and the like have not been described in detail so as not to unnecessarily obscure aspects of the present invention.

The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims (7)

1. An intra-osseous total ankle prosthesis system comprising:

a tibial component;

a diaphyseal support assembly for enhancing intramedullary stability, the diaphyseal support assembly being disposed on top of the tibial assembly;

The polyethylene gasket is fixedly connected with the tibia component through the clamping component;

A liquid discharge hole;

a sealing assembly for ensuring that the drain hole is not filled with bone cement;

a chamfer cut talus rotationally attached to the bottom of the polyethylene spacer;

The first fixing component comprises a feeding port, a first runner, a filling runner and a second runner which are circularly arranged in the tibia component at equal intervals, the feeding port, the first runner, the filling runner and the second runner are mutually communicated, the cross section of the feeding port is in a horn shape, the inner diameters of the first runner, the filling runner and the second runner are smaller than the inner diameter of the feeding port, the cross section of the filling runner is spiral, and the inner diameter of the second runner is gradually reduced along the direction close to the backbone support component;

The tibia component comprises a tibia tray, the first fixing component and the second fixing component are both arranged in the tibia tray, and the second fixing component comprises a second circular groove formed in the outer wall of the top of the tibia tray;

the sealing assembly comprises a sliding groove arranged on the circumferential inner wall of the second annular groove, the sliding groove is communicated with the liquid discharge hole, and a sliding plate used for guaranteeing the sealing of the liquid discharge hole is connected inside the sliding groove in a sliding manner;

The inner wall of the bottom of the second circular groove is provided with a groove, the inside of the groove is connected with a ring plate in a sliding way, the outer wall of the top of the ring plate is fixedly connected with a bent column, and one end of the bent column, which is far away from the ring plate, is fixedly connected with the sliding plate;

the bottom inner wall fixedly connected with spring of recess, the top fixed connection of spring is in on the bottom outer wall of annular plate.

2. The intraosseous total ankle joint prosthesis system of claim 1, wherein one side of the tibial tray is provided with a mating plate, and an outer wall of one side of the mating plate is provided with through holes which are equidistantly distributed and facilitate passage of tibial nails.

3. The intraosseous total ankle joint prosthesis system according to claim 2, wherein the diaphysis supporting component comprises a hollow supporting piece, the hollow supporting piece is in a honeycomb shape, the upper end and the lower end of the hollow supporting piece are fixedly connected with circular plates, one circular plate positioned at the top of the hollow supporting piece is fixedly connected with a second screw rod, one circular plate positioned at the bottom of the hollow supporting piece is fixedly connected with a first screw rod, a thread groove is formed in the top of the tibial tray, the diaphysis supporting component is fixedly arranged on the outer wall of the top of the tibial tray through threaded connection between the first screw rod and the thread groove, and three circular plates positioned at the bottom of the hollow supporting piece are fixedly connected with threaded sleeves which are in threaded connection with the second screw rod.

4. The intraosseous total ankle joint prosthesis system according to claim 3, wherein another circular plate positioned at the top of the hollowed-out supporting piece is fixedly connected with a butt joint, the butt joint is bullet-shaped, three groups of first circular grooves are formed in the butt joint from top to bottom, the inner diameters of the three groups of first circular grooves are gradually increased from top to bottom, the circumferential outer wall of the butt joint is provided with inclined grooves which are distributed circularly at equal distances, and the inclined grooves are communicated with the first circular grooves.

5. The intraosseous total ankle joint prosthesis system according to claim 2, wherein the clamping assembly comprises a locking plate fixedly connected to the outer wall of the top of the polyethylene liner, a convex block is fixedly connected to the outer wall of the top of the locking plate, an embedded groove is formed in the top of the locking plate, a locking groove is formed in the outer wall of the bottom of the tibial tray, the locking groove is matched with the locking plate, a clamping groove is formed in one side of the locking groove, the clamping groove is matched with the convex block, a clamping block is fixedly connected to the inner wall of one side of the locking groove, and the clamping block is matched with the embedded groove.

6. The intraosseous total ankle joint prosthesis system according to claim 2, wherein the drain holes are in equidistant fan-shaped distribution on one side of the tibial tray, the inner diameter of the drain holes gradually increases in a direction away from the second fixing component, and the drain holes are obliquely opened in the tibial tray.

7. The intraosseous total ankle joint prosthesis system according to claim 2, wherein the inner walls of the two sides of the second circular groove are fixedly connected with partition plates which are distributed in an arc shape at equal distances, and the partition plates on the inner walls of the two sides of the second circular groove are distributed in a staggered manner.