CN111839828A - 3D prints ankle joint system false body - Google Patents
3D prints ankle joint system false body Download PDFInfo
- Publication number
- CN111839828A CN111839828A CN202010820062.2A CN202010820062A CN111839828A CN 111839828 A CN111839828 A CN 111839828A CN 202010820062 A CN202010820062 A CN 202010820062A CN 111839828 A CN111839828 A CN 111839828A
- Authority
- CN
- China
- Prior art keywords
- prosthesis
- talus
- titanium alloy
- ankle joint
- polyethylene pad
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 210000000544 articulatio talocruralis Anatomy 0.000 title claims abstract description 39
- 210000004233 talus Anatomy 0.000 claims abstract description 53
- 239000004698 Polyethylene Substances 0.000 claims abstract description 48
- -1 polyethylene Polymers 0.000 claims abstract description 48
- 229920000573 polyethylene Polymers 0.000 claims abstract description 48
- 229910001069 Ti alloy Inorganic materials 0.000 claims abstract description 37
- MTHLBYMFGWSRME-UHFFFAOYSA-N [Cr].[Co].[Mo] Chemical compound [Cr].[Co].[Mo] MTHLBYMFGWSRME-UHFFFAOYSA-N 0.000 claims abstract description 34
- 210000002303 tibia Anatomy 0.000 claims abstract description 28
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 26
- 238000009434 installation Methods 0.000 claims abstract description 10
- 208000010392 Bone Fractures Diseases 0.000 claims abstract description 8
- 210000000459 calcaneus Anatomy 0.000 claims abstract description 5
- 210000003423 ankle Anatomy 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 4
- 238000007639 printing Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 12
- 238000010146 3D printing Methods 0.000 abstract description 5
- 230000007774 longterm Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 210000002683 foot Anatomy 0.000 description 2
- 210000003041 ligament Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 208000036487 Arthropathies Diseases 0.000 description 1
- 206010024774 Localised infection Diseases 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 208000012902 Nervous system disease Diseases 0.000 description 1
- 208000025966 Neurological disease Diseases 0.000 description 1
- 206010031264 Osteonecrosis Diseases 0.000 description 1
- 208000001132 Osteoporosis Diseases 0.000 description 1
- 206010003246 arthritis Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 210000000610 foot bone Anatomy 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000009916 joint effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
- 208000019553 vascular disease Diseases 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
- A61F2/4202—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for ankles
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2002/30769—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth madreporic
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
- A61F2/4202—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for ankles
- A61F2002/4205—Tibial components
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
- A61F2/4202—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for ankles
- A61F2002/4207—Talar components
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Materials For Medical Uses (AREA)
- Prostheses (AREA)
Abstract
The invention provides a 3D printing ankle joint system prosthesis which comprises a titanium alloy talus prosthesis, a cobalt-chromium-molybdenum talus prosthesis, a polyethylene pad and a tibia far-end prosthesis, wherein a matching structure is arranged at the top of the titanium alloy talus prosthesis; the titanium alloy talus prosthesis is also provided with a bone screw hole, and a calcaneus fixing hole is formed in the protruding part at the rear end of the titanium alloy talus prosthesis; the bottom of the titanium alloy talar prosthesis is provided with a micropore structure; a fixing structure is arranged at the bottom of the cobalt-chromium-molybdenum talus prosthesis; the top of the cobalt-chromium-molybdenum talus prosthesis is provided with an installation opening, and the bottom of the installation opening is provided with a joint sliding surface; the bottom of the polyethylene pad is limited in the mounting opening, and the bottom surface of the polyethylene pad is a joint surface; the tibia far-end prosthesis is connected with the polyethylene pad, and the top of the tibia far-end prosthesis is provided with a locking nail bone fracture plate and an intramedullary needle; the tibia far-end prosthesis is provided with a micropore structure. The invention can realize the replacement of the defect of the large bone of the ankle joint, recover the mobility of the ankle joint, realize the bone ingrowth and realize the long-term stability of the prosthesis.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to a 3D printing ankle joint system prosthesis.
Background
The ankle joint is seriously damaged in function, suffers from pain for a long time and has low life quality due to bone defects caused by arthritis, trauma or tumor and the like. The current treatment methods for ankle joint dysfunction mainly comprise conservative treatment and surgical treatment. The operation treatment also comprises joint protection treatment and non-joint protection treatment, wherein the joint protection treatment comprises osteotomy correction force line, joint cavity cleaning, joint traction machine joint stabilization operation and the like, and the non-joint protection treatment comprises joint fusion and joint replacement. And the only way to do joint defects is to perform ankle replacement.
But ankle joint defects can cause loss of the articular surface and only joint replacement can be considered. The indications for ankle replacement prostheses currently marketed are as follows: the requirement on the functionality of the prosthesis is not high; the patient is over 50 years old; is suitable for patients with rheumatoid diseases. The contraindications are as follows: severe defects of ankle joint geometry; osteoporosis is severe or also osteonecrosis; foot infections; vascular disease or severe neurological disease; ligament instability and foot deformation affect the position.
In combination with the above, for ankle joint bone defects, especially for large bone defect areas, including talus and distal tibial large bone defects, no suitable prosthesis is currently available to address such conditions.
Disclosure of Invention
It is an object of the present invention to provide a 3D printed ankle joint system prosthesis to solve the above technical problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
A3D printing ankle joint system prosthesis comprises a titanium alloy talus prosthesis, a cobalt-chromium-molybdenum talus prosthesis, a polyethylene pad and a tibia far-end prosthesis, wherein a matching structure used for being connected with the cobalt-chromium-molybdenum talus prosthesis is arranged at the top of the titanium alloy talus prosthesis, and limiting surfaces are arranged on the front side and the rear side of the matching structure; the titanium alloy talus prosthesis is also provided with a bone screw hole, the rear side of the titanium alloy talus prosthesis is provided with a convex part, and the convex part is provided with a calcaneus fixing hole for suturing; the bottom of the titanium alloy talar prosthesis is provided with a microporous structure suitable for bone ingrowth; the bottom of the cobalt-chromium-molybdenum talus prosthesis is provided with a fixing structure and a matching surface which are respectively matched with the matching structure and the limiting surface; the top of the cobalt-chromium-molybdenum talus prosthesis is provided with an installation opening, and the bottom of the installation opening is provided with a joint sliding surface; the bottom of the polyethylene pad is limited in the mounting opening, and the bottom surface of the polyethylene pad is a joint surface in sliding fit with the joint sliding surface; the bottom of the tibia far-end prosthesis is connected with the top of the polyethylene pad, the top of the tibia far-end prosthesis is provided with a locking nail bone fracture plate and an intramedullary pin, the locking nail bone fracture plate is provided with a locking nail hole, and the intramedullary pin is provided with a nail hole opposite to the locking nail hole; the area of the tibia far-end prosthesis, which is used for contacting with the bone, is provided with a micropore structure suitable for bone ingrowth.
Preferably, the matching structure is a conical hole and a round hole which are oppositely arranged, and the diameter of the upper end of the conical hole is larger than that of the lower end of the conical hole; the cobalt fixing structure is a cone frustum and a cylinder, the cone frustum is matched with the cone hole, and the cylinder is matched with the round hole.
Preferably, the bottom of the distal tibial prosthesis is snap-fit to the top of the polyethylene pad.
Preferably, a groove is formed in the bottom of the tibia far-end prosthesis, and a clamping groove is formed in the inner wall of the groove; the top of the polyethylene pad is used for extending into the groove, and a limiting bulge matched with the clamping groove is arranged on the outer wall of the top of the polyethylene pad.
Preferably, one side of the limiting protrusion, which is far away from the joint surface, is an inclined surface.
Preferably, the inner walls of the two sides of the mounting opening are relatively provided with anti-falling limiting grooves; the two sides of the bottom of the polyethylene pad are provided with anti-falling wings which are in clearance fit with the anti-falling limiting grooves.
Preferably, the outer surface of the upper side wall of the anti-falling limiting groove is an arc-shaped surface.
Preferably, the front plane and the rear plane of the bottom of the polyethylene pad are both limit inclined planes.
Preferably, the pore size of the microporous structure is 500-700 μm on average, and the porosity is 60-80%.
Preferably, the distal tibial prosthesis is made of a titanium alloy material.
The invention has the beneficial effects that:
according to the 3D printing ankle joint system prosthesis, the titanium alloy talus prosthesis is connected with the cobalt-chromium-molybdenum talus prosthesis through the matching structure and the fixing structure, the top of the polyethylene pad is connected with the tibia far-end prosthesis, the bottom of the polyethylene pad is limited in the installation opening of the cobalt-chromium-molybdenum talus prosthesis, and through sliding fit between the joint sliding surface of the cobalt-chromium-molybdenum talus prosthesis and the joint surface of the polyethylene pad, plantarflexion movement of an ankle joint can be achieved, namely the mobility of the ankle joint is achieved, so that replacement of the ankle joint of a patient suffering from ankle joint bone defect diseases can be well achieved.
Drawings
In order to more clearly describe the embodiments of the present application or the technical solutions in the prior art, the drawings required in the embodiments will be briefly described below, and the embodiments of the present invention will be further described in detail with reference to the drawings, wherein
FIG. 1 is a schematic view of a 3D printed ankle system prosthesis provided by an embodiment of the present invention;
FIG. 2 is a schematic view of a titanium alloy talar prosthesis according to an embodiment of the present invention;
FIG. 3 is another schematic view of a titanium alloy talar prosthesis according to an embodiment of the present invention;
FIG. 4 is a schematic view of a cobalt chromium molybdenum talar prosthesis according to an embodiment of the present invention;
FIG. 5 is a schematic view of a polyethylene mat according to an embodiment of the present invention;
FIG. 6 is a schematic view of a distal tibial prosthesis provided in accordance with an embodiment of the present invention;
fig. 7 is another schematic view of a distal tibial prosthesis provided in accordance with an embodiment of the present invention.
In the drawings, the reference numbers:
1. 1-1 parts of titanium alloy talar prosthesis, 1-2 parts of bone screw hole, 1-3 parts of conical hole and circular hole
1-4 parts of limiting surface 1-5 parts of calcaneus fixing hole 1-6 parts of micropore structure
2. 2-1 of cobalt-chromium-molybdenum talus prosthesis, 2-2 of cone frustum, 2-3 of cylinder and joint sliding surface
2-4 parts of anti-falling limiting groove 2-5 parts of arc-shaped surface 3 parts of polyethylene pad 3-1 parts of top part
3-2 parts of limiting bulge 3-3 parts of anti-drop wing 3-4 parts of limiting inclined plane 3-5 parts of joint surface
4. Tibia far-end prosthesis 4-1, lock pin bone fracture plate 4-2 and intramedullary needle
4-3 parts of microporous structure, 4-4 parts of groove, 4-5 parts of lock pin hole and 4-6 parts of nail hole
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description will be provided with reference to specific embodiments.
As shown in fig. 1 to 7, an embodiment of the present invention provides a 3D printed ankle joint system prosthesis, which includes a titanium alloy talus prosthesis 1, a cobalt-chromium-molybdenum talus prosthesis 2, a polyethylene pad 3, and a tibia distal prosthesis 4, wherein a matching structure is disposed at the top of the titanium alloy talus prosthesis, and limiting surfaces 1 to 4 are disposed on two sides of the matching structure; the titanium alloy talus prosthesis is also provided with bone screw holes 1-1, the rear side of the titanium alloy talus prosthesis is provided with a convex part, and the convex part is provided with calcaneus fixing holes 1-5; the bottom of the titanium alloy talar prosthesis is provided with a microporous structure 1-6; the bottom of the cobalt-chromium-molybdenum talar prosthesis 2 is provided with a fixing structure and a matching surface which are respectively matched with the matching structure and the limiting surface; the top of the cobalt-chromium-molybdenum talus prosthesis is provided with an installation opening, and the bottom of the installation opening is provided with an articular sliding surface 2-3; the bottom of the polyethylene pad is limited in the mounting opening, and the bottom surface of the polyethylene pad is a joint surface 3-5 in sliding fit with the joint sliding surface; the bottom of the tibia far-end prosthesis is connected with the top of the polyethylene pad, the top of the tibia far-end prosthesis is provided with a locking nail bone fracture plate 4-1 and an intramedullary needle 4-2, and the locking nail bone fracture plate and the intramedullary needle are respectively provided with a locking nail hole 4-5 and a nail hole 4-6; the joint of the tibia far-end prosthesis and the intramedullary needle is provided with a micropore structure 4-3 suitable for bone ingrowth.
According to the 3D printing ankle joint system prosthesis provided by the embodiment of the invention, the titanium alloy talus prosthesis 1 and the cobalt-chromium-molybdenum talus prosthesis 2 are connected through a matching structure and a fixing structure, the top of the polyethylene pad is connected with the tibia far-end prosthesis 4, the bottom of the polyethylene pad 3 is limited in an installation opening of the cobalt-chromium-molybdenum talus prosthesis, and through sliding fit between a joint sliding surface of the cobalt-chromium-molybdenum talus prosthesis and a joint surface of the polyethylene pad, the plantar flexion of an ankle joint can be realized, namely the mobility of the ankle joint is realized, so that the replacement of the ankle joint of a patient suffering from ankle joint bone defect can be well realized; the average pore size of the microporous structure is 500-700 mu m, the porosity is 60-80%, the bone ingrowth is facilitated, and the long-term stability of the prosthesis can be realized.
Furthermore, the matching structure comprises a conical hole 1-2 and a round hole 1-3 which are oppositely arranged, and the diameter of the upper end of the conical hole is larger than that of the lower end of the conical hole; the fixing structure comprises a cone frustum 2-1 and a cylinder 2-2, the cone frustum is matched with the cone hole, and the cylinder is matched with the round hole. By adopting the scheme, the tight anti-rotation fit between the titanium alloy talus prosthesis and the cobalt-chromium-molybdenum talus prosthesis is realized, the tight cone fit between the titanium alloy talus prosthesis and the cobalt-chromium-molybdenum talus prosthesis is realized through the fit between the cone frustum 2-1 and the cone hole 1-2, the titanium alloy talus prosthesis 1 and the cobalt-chromium-molybdenum talus prosthesis 2 are ensured not to be separated, and meanwhile, the titanium alloy talus prosthesis 1 and the cobalt-chromium-molybdenum talus prosthesis 2 can be prevented from relative rotation through the fit between the cylinder 2-2 and the round hole 1-3. It will be appreciated that the connection between the titanium alloy talar prosthesis 1 and the cobalt chromium molybdenum talar prosthesis 2 may be achieved using other structures that are resistant to rotation and are stable in connection.
Specifically, the bottom of the distal tibial prosthesis 4 is snap-fitted to the top of the polyethylene pad 3.
As shown in fig. 7, a groove 4-4 is formed at the bottom of the tibia far-end prosthesis, and a clamping groove is formed on the inner wall of the groove 4-4; the top of the polyethylene pad 3 is used for extending into the groove, and the outer wall of the top of the polyethylene pad is provided with a limiting bulge 3-2 used for being matched with the clamping groove, so that the polyethylene pad can be better prevented from falling out of the tibia far-end prosthesis, and the stability of the ankle joint system prosthesis is ensured. The groove can be preferably a rectangular groove, and the four inner walls of the groove can be provided with clamping grooves at the moment, so that relative rotation can be prevented in the movement process.
Preferably, the side of the limiting bulge 3-2 far away from the joint surface is a slope, so that the polyethylene pad and the tibia far-end prosthesis can be conveniently installed. It will be appreciated that the articular surface conforms to the articular sliding surface.
Furthermore, anti-falling limiting grooves 2-4 are oppositely arranged on the inner walls of the two sides of the mounting opening; the two sides of the bottom of the polyethylene pad are provided with anti-falling wings 3-3, and the anti-falling wings are in clearance fit with the anti-falling limiting grooves, so that the anti-falling wings can be limited by the side walls of the anti-falling limiting grooves, and the polyethylene pad is prevented from being separated from the mounting opening. It can be understood that the joint sliding surface of the cobalt-chromium-molybdenum talus prosthesis and the joint surface of the polyethylene pad form a joint moving interface together, and the joint moving interface conforms to the natural ankle joint plantar flexion movement locus of a normal person; the anti-drop limiting grooves 2-4 can prevent the joint surfaces from dislocation, the anti-drop limiting grooves do not participate in contact during normal movement, the anti-drop limiting grooves play a limiting role when turning inwards and outwards, and meanwhile the limiting inclined surfaces 3-4 prevent excessive plantarflexion movement of the joint moving interface.
Specifically, the outer surface of the upper side wall of the anti-falling limiting groove is an arc-shaped surface 2-5, so that the gap consistency can be kept during joint movement. It can be understood that the connection between the cobalt-chromium-molybdenum talus prosthesis 2 and the polyethylene pad 3 can also be realized by other structures with certain internal and external rotation and internal and external turning mobility; the microporous structure can facilitate the growth of bone tissues so as to ensure the long-term stability of the ankle joint system prosthesis after being implanted into a human body.
Preferably, the front plane and the rear plane of the bottom of the polyethylene pad are both limited inclined planes 3-4, so that the joint surface can be limited on the joint sliding surface, namely the joint surface 3-5 of the bottom of the polyethylene pad and the joint sliding surface 2-3 have the same radian curved surface, the contact area of the joint surface can be ensured, and the contact stress can be reduced. It will be appreciated that the cobalt chromium molybdenum talar prosthesis 2 is made of cobalt chromium molybdenum material.
Specifically, the pore size of the microporous structure is 500-700 μm on average, and the porosity is 60-80%.
Preferably, the distal tibial prosthesis 4 is made of a titanium alloy material. The titanium alloy talar prosthesis is also made of a titanium alloy material, and may be machined by additive manufacturing and machined to ensure fit dimensions. It can be understood that the tibia far-end prosthesis, the intramedullary nail 4-2 and the locking nail plate 4-1 can be of an integrated structure so as to realize stable fixation with a bone defect area, and meanwhile, the locking nail holes 4-5 on the locking nail plate are matched with guide sleeves frequently used in clinic so as to ensure that locking screws can correctly pass through intramedullary nail holes in operation.
The 3D printing ankle joint system prosthesis structure provided by the embodiment of the invention can be designed in a customized manner according to patients and is realized by combining additive manufacturing, and the geometric appearances of the titanium alloy talus prosthesis 1, the cobalt-chromium-molybdenum talus prosthesis 2, the polyethylene pad 3 and the tibia far-end prosthesis 4 can be designed in a customized manner according to different patients; the geometry of the ankle joint system prosthesis is matched with the skeleton shape; the tibia far-end prosthesis can realize bone geometric shape matching with the retained tibia, and restore the tibia form and the mechanical structure; the titanium alloy talus prosthesis and the foot bone structure phase-match that remains can resume the geometric morphology and the mechanical structure of foot, have realized ankle joint's activity degree between cobalt chromium molybdenum talus prosthesis and the polyethylene pad to can adopt cobalt chromium molybdenum to the articular surface of polyethylene, guarantee low wearing and tearing, simultaneously under the effect that lacks the ligament, can restrict articular activity, can not cause because of excessive activity dislocation. The invention can better realize the replacement of the ankle joint large bone defect and restore the mobility of the ankle joint, and can realize bone ingrowth and long-term stability of the prosthesis.
The above are only preferred embodiments of the present invention, it should be noted that these examples are only for illustrating the present invention and not for limiting the scope of the present invention, and after reading the content of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalents also fall within the scope of the claims appended to the present application.
Claims (10)
1. A3D printing ankle joint system prosthesis is characterized by comprising a titanium alloy talus prosthesis, a cobalt-chromium-molybdenum talus prosthesis, a polyethylene pad and a tibia far-end prosthesis, wherein a matching structure used for being connected with the cobalt-chromium-molybdenum talus prosthesis is arranged at the top of the titanium alloy talus prosthesis, and limiting surfaces are arranged on the front side and the rear side of the matching structure; the titanium alloy talus prosthesis is also provided with a bone screw hole, the rear side of the titanium alloy talus prosthesis is provided with a convex part, and the convex part is provided with a calcaneus fixing hole for suturing; the bottom of the titanium alloy talar prosthesis is provided with a microporous structure suitable for bone ingrowth; the bottom of the cobalt-chromium-molybdenum talus prosthesis is provided with a fixing structure and a matching surface which are respectively matched with the matching structure and the limiting surface; the top of the cobalt-chromium-molybdenum talus prosthesis is provided with an installation opening, and the bottom of the installation opening is provided with a joint sliding surface; the bottom of the polyethylene pad is limited in the mounting opening, and the bottom surface of the polyethylene pad is a joint surface in sliding fit with the joint sliding surface; the bottom of the tibia far-end prosthesis is connected with the top of the polyethylene pad, the top of the tibia far-end prosthesis is provided with a locking nail bone fracture plate and an intramedullary pin, the locking nail bone fracture plate is provided with a locking nail hole, and the intramedullary pin is provided with a nail hole opposite to the locking nail hole; the area of the tibia far-end prosthesis, which is used for contacting with the bone, is provided with a micropore structure suitable for bone ingrowth.
2. The 3D printed ankle joint system prosthesis according to claim 1, wherein the fitting structure is a conical bore and a circular bore arranged oppositely, the diameter of the upper end of the conical bore being larger than the diameter of the lower end of the conical bore; the fixing structure is a cone frustum and a cylinder, the cone frustum is matched with the cone hole, and the cylinder is matched with the round hole.
3. The 3D printed ankle system prosthesis of claim 1, wherein the bottom portion of the distal tibial prosthesis is snap-fit to the top portion of the polyethylene pad.
4. The 3D printed ankle joint system prosthesis of claim 3, wherein the bottom of the distal tibial prosthesis is provided with a groove, and the inner wall of the groove is provided with a snap groove; the top of the polyethylene pad is used for extending into the groove, and a limiting bulge matched with the clamping groove is arranged on the outer wall of the top of the polyethylene pad.
5. The 3D printed ankle joint system prosthesis of claim 4, wherein a side of the stop protrusion distal from the articular surface is beveled.
6. The 3D printed ankle joint system prosthesis of claim 1, wherein anti-drop retaining grooves are oppositely disposed on the inner walls of both sides of the mounting opening; the two sides of the bottom of the polyethylene pad are provided with anti-falling wings which are in clearance fit with the anti-falling limiting grooves.
7. The 3D printed ankle joint system prosthesis of claim 6, wherein the outer surface of the upper sidewall of the anti-slip retaining groove is an arcuate surface.
8. The 3D printed ankle joint system prosthesis of claim 6, wherein the anterior-posterior planar surface of the bottom portion of the polyethylene pad is a stop incline surface.
9. The 3D printed ankle system prosthesis according to claim 1, wherein the pore size in the microporous structure is on average 500-700 μm and the porosity is 60-80%.
10. The 3D printed ankle system prosthesis of any of claims 1 to 9, wherein the distal tibial prosthesis is made of a titanium alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010820062.2A CN111839828A (en) | 2020-08-14 | 2020-08-14 | 3D prints ankle joint system false body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010820062.2A CN111839828A (en) | 2020-08-14 | 2020-08-14 | 3D prints ankle joint system false body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111839828A true CN111839828A (en) | 2020-10-30 |
Family
ID=72969005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010820062.2A Pending CN111839828A (en) | 2020-08-14 | 2020-08-14 | 3D prints ankle joint system false body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111839828A (en) |
-
2020
- 2020-08-14 CN CN202010820062.2A patent/CN111839828A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5326365A (en) | Ankle implant | |
| US6238434B1 (en) | Knee joint prosthesis with spinout prevention | |
| EP2967883B1 (en) | Prosthetic knee implant | |
| JP2013523319A (en) | Thigh base and tibial base | |
| CN208989262U (en) | A kind of artificial knee joint prosthesis | |
| US11690727B2 (en) | Artificial ankle joint tibia component | |
| CN213310610U (en) | 3D prints distal humerus prosthesis | |
| CN204909727U (en) | Shin bone replacement false body | |
| CN212438954U (en) | 3D prints ankle joint system false body | |
| CN111839828A (en) | 3D prints ankle joint system false body | |
| CN110664519A (en) | Knee joint prosthesis | |
| CN109157309A (en) | Proximal tibia filling block prosthese | |
| CN214484742U (en) | Tibia straight/eccentric extension rod | |
| CN106031667A (en) | Artificial knee joint and tibia component and femur component thereof | |
| CN214387784U (en) | Replacement scaphoid used in orthopedic surgery | |
| CN113069248A (en) | Bone defect repair system for wrist joint | |
| CN211067219U (en) | Hip joint prosthesis | |
| CN209316155U (en) | Proximal tibia filling block prosthese | |
| WO2010096960A1 (en) | Artificial knee replacement prostheses with anterior cruciate ligament reserved or reconstructed | |
| CN217744711U (en) | Calcaneal tuberosity prosthesis and calcaneal prosthesis | |
| CN112137766A (en) | Replacement scaphoid used in orthopedic surgery | |
| CN214805726U (en) | Bone defect repair system for wrist joint | |
| CN220193265U (en) | Tibia plug-in knee joint revision operation of rotary hinge | |
| CN211658427U (en) | Knee joint prosthesis | |
| CN215606599U (en) | Femoral prosthesis |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20231228 Address after: 102200 Beijing science and Technology Park of Changping District Bai Fu Road 10 Applicant after: BEIJING AK MEDICAL Co.,Ltd. Address before: 100191 No. 49 Garden North Road, Beijing, Haidian District Applicant before: PEKING University THIRD HOSPITAL (PEKING UNIVERSITY THIRD CLINICAL MEDICAL College) |