CN117426907A - Personalized first metacarpal prosthesis - Google Patents
Personalized first metacarpal prosthesis Download PDFInfo
- Publication number
- CN117426907A CN117426907A CN202311290364.3A CN202311290364A CN117426907A CN 117426907 A CN117426907 A CN 117426907A CN 202311290364 A CN202311290364 A CN 202311290364A CN 117426907 A CN117426907 A CN 117426907A
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- CN
- China
- Prior art keywords
- cup
- groove
- personalized
- lining
- ball
- 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
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 40
- 230000007704 transition Effects 0.000 claims abstract description 4
- GVJHHUAWPYXKBD-UHFFFAOYSA-N (±)-α-Tocopherol Chemical compound OC1=C(C)C(C)=C2OC(CCCC(C)CCCC(C)CCCC(C)C)(C)CCC2=C1C GVJHHUAWPYXKBD-UHFFFAOYSA-N 0.000 claims description 10
- 238000010146 3D printing Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 7
- 229930003427 Vitamin E Natural products 0.000 claims description 5
- WIGCFUFOHFEKBI-UHFFFAOYSA-N gamma-tocopherol Natural products CC(C)CCCC(C)CCCC(C)CCCC1CCC2C(C)C(O)C(C)C(C)C2O1 WIGCFUFOHFEKBI-UHFFFAOYSA-N 0.000 claims description 5
- 229940046009 vitamin E Drugs 0.000 claims description 5
- 235000019165 vitamin E Nutrition 0.000 claims description 5
- 239000011709 vitamin E Substances 0.000 claims description 5
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 4
- 229910010293 ceramic material Inorganic materials 0.000 claims description 4
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 3
- 229910000684 Cobalt-chrome Inorganic materials 0.000 claims 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims 1
- 239000010952 cobalt-chrome Substances 0.000 claims 1
- 239000011733 molybdenum Substances 0.000 claims 1
- 229910052750 molybdenum Inorganic materials 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 11
- 230000007774 longterm Effects 0.000 abstract description 4
- 238000011282 treatment Methods 0.000 abstract description 4
- 239000004570 mortar (masonry) Substances 0.000 description 11
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 description 8
- 210000000236 metacarpal bone Anatomy 0.000 description 5
- 239000000956 alloy Substances 0.000 description 4
- 210000003484 anatomy Anatomy 0.000 description 4
- 230000001054 cortical effect Effects 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- MTHLBYMFGWSRME-UHFFFAOYSA-N [Cr].[Co].[Mo] Chemical compound [Cr].[Co].[Mo] MTHLBYMFGWSRME-UHFFFAOYSA-N 0.000 description 3
- 230000008468 bone growth Effects 0.000 description 3
- 210000001713 trapezium bone Anatomy 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 206010061363 Skeletal injury Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 206010003246 arthritis Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 210000000511 carpometacarpal joint Anatomy 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000011337 individualized treatment Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
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- 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
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- A—HUMAN NECESSITIES
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- 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
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
-
- A—HUMAN NECESSITIES
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- 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
- A61F2/4241—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for hands, e.g. fingers
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- A—HUMAN NECESSITIES
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- 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
- A61F2/4261—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for wrists
-
- A—HUMAN NECESSITIES
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- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/02—Inorganic materials
- A61L27/04—Metals or alloys
- A61L27/06—Titanium or titanium alloys
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- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
- A61L27/16—Macromolecular materials obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L27/56—Porous materials, e.g. foams or sponges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
- B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
-
- 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
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
- A61F2002/3006—Properties of materials and coating materials
-
- 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
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
- A61F2002/30332—Conically- or frustoconically-shaped protrusion and recess
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- 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
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30772—Apertures or holes, e.g. of circular cross section
-
- 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
- A61F2002/3093—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth for promoting ingrowth of bone tissue
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- 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
- A61F2/3094—Designing or manufacturing processes
- A61F2002/30985—Designing or manufacturing processes using three dimensional printing [3DP]
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- A—HUMAN NECESSITIES
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- 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
- A61F2/4241—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for hands, e.g. fingers
- A61F2002/4256—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for hands, e.g. fingers for carpo-metacarpal joints, i.e. CMC joints
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2430/00—Materials or treatment for tissue regeneration
- A61L2430/02—Materials or treatment for tissue regeneration for reconstruction of bones; weight-bearing implants
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Biomedical Technology (AREA)
- Cardiology (AREA)
- Materials Engineering (AREA)
- Dermatology (AREA)
- Medicinal Chemistry (AREA)
- Epidemiology (AREA)
- Manufacturing & Machinery (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Composite Materials (AREA)
- Structural Engineering (AREA)
- Materials For Medical Uses (AREA)
- Prostheses (AREA)
Abstract
The invention discloses a personalized first metacarpal prosthesis, belonging to the technical field of medical prostheses; the device comprises a cup, a lining, a ball head and a marrow needle; the cup is of a hemispherical structure, the top surface of the cup is a convex surface, and the bottom surface of the cup is a groove; the convex surface is provided with a plurality of convex structures for resisting rotation; the groove is circular, the bottom of the groove is concave, and the bottom of the groove and the side wall of the groove are in smooth transition; the lining is embedded in the groove of the cup; the bottom surface of the cup is provided with a ball socket; the surface of the marrow needle is of a bone trabecula structure, the top end of the marrow needle is provided with the ball head which is matched with the marrow needle in a taper way, the ball head is in ball socket ball joint with the cup, and the movable angle of the ball joint is 90 degrees. The invention is implanted into a human body to realize accurate individuation treatment, the trabecular bone structure is also anti-rotation, the initial stability is good, the long-term bone ingrowth effect is better, and the stability can also meet the requirements.
Description
Technical Field
The invention relates to the technical field of medical prostheses, in particular to a personalized first metacarpal prosthesis.
Background
The metacarpal bones play an irreplaceable role in daily life, metacarpal bone injury is mostly caused by violence, extrusion, arthritis and other reasons, the injury of the first metacarpal bones greatly affects the functions of hands, the first metacarpal bones can play the functions of bending, retracting, expanding, aligning hands and the like, the existing bone grafting technology can meet the reconstruction of the bone length, but the reconstruction of the carpometacarpal joints is impossible, the fusion technology is adopted in common times for the first carpometpal joints, the operation limits the activity of some joints, so that the reconstruction of the first metacarpometpal joints can increase the activity of the joints, simultaneously lighten pain, meet the clinical requirements and recover the functions of the first metacarpometpal bones.
Disclosure of Invention
The object of the present invention is to provide a personalized first metacarpal prosthesis. The novel bone trabecula is implanted into a human body to realize accurate individuation treatment, the trabecula structure is also anti-rotating, the initial stability is good, the long-term bone ingrowth effect can be better, and the stability can also meet the requirements.
The aim of the invention is achieved by the following technical scheme:
a personalized first metacarpal prosthesis, comprising a cup, a liner, a bulb and a marrow needle;
the cup is of a hemispherical structure, the top surface of the cup is a convex surface, and the bottom surface of the cup is a groove; the convex surface is provided with a plurality of convex structures for resisting rotation; the groove is circular, the bottom of the groove is concave, and the bottom of the groove and the side wall of the groove are in smooth transition; the side wall is provided with a ring groove; the center of the ring groove is positioned on the central shaft of the cup; an anti-rotation groove is arranged at the edge of the opening of the groove;
the lining is embedded in the groove of the cup; the outer surface of the lining is provided with an annular bulge which is embedded in the annular groove; the lower edge of the outer surface of the lining is provided with anti-rotation blocks which are matched with the anti-rotation grooves, and the anti-rotation grooves are in one-to-one correspondence with the anti-rotation blocks; the top surface of the cup is matched with the concave surface of the bottom of the groove; the bottom surface of the cup is provided with a ball socket;
the surface of the marrow needle is of a bone trabecula structure, the top end of the marrow needle is provided with a ball head which is matched with the marrow needle in a taper way, the ball head is in ball socket ball joint with the cup, and the movable angle of the ball joint is 90 degrees.
Further, the material of the mortar cup is titanium alloy, and the convex surface of the mortar cup is provided with a porous bone trabecula structure.
Further, the lining is made of vitamin E high-crosslinking ultra-high molecular weight polyethylene material.
Further, the annular bulge is provided with a fracture for preventing expansion caused by heat and contraction caused by cold.
Further, the ball head is made of cobalt-chromium-molybdenum or ceramic material.
Furthermore, the marrow needle is manufactured by adopting a 3D printing porous structure process.
Compared with the prior art, the invention has the advantages that:
1. the mortar cup is made of titanium alloy materials and is manufactured by adopting a 3D printing porous structure process, and the porous bone trabecular structure can form a good bone ingrowth effect with cancellous bone and cortical bone, so that the initial stability of the mortar cup is better; the convex structure plays a role in stabilizing the mortar cup in the trapezium bone; the mortar cup is manufactured through three-dimensional software according to the physiological anatomy structure of the bone of a patient, can meet various bone defect conditions, is implanted into a human body, realizes accurate individualized treatment, has the advantages of anti-rotation of a trabecular structure, good initial stability, better long-term bone growth effect and satisfactory stability.
2. The convex structure plays a role in resisting rotation of the cup and prevents the displacement of the implanted cup and bones;
3. the cup and the liner adopt cone matching and meshing structures, so that the cup and the liner do not generate relative displacement.
4. The cup is made of titanium alloy material and 3D printing process, and the liner is made of vitamin E high-crosslinking polyethylene material.
5. The marrow needle is manufactured by adopting a 3D printing porous structure process, a porous bone trabecular structure on the marrow needle can form good bone growth effect with cancellous bone and cortical bone, the marrow needle is manufactured by three-dimensional software according to the physiological anatomy structure of a patient bone, various bone defect conditions of a marrow cavity can be met, the initial stability is good, the long-term bone growth effect can be better, and the stability can also meet the requirements. The trabecular bone structure is also anti-rotational.
6. The ball head and the marrow needle adopt a cone-fit structure, and the press-fit structure is stable.
7. The lining and the cup have stable matching structure, which can prevent the cup and the lining from rotating.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention.
FIG. 2 is a schematic view of the top surface configuration of the cup of FIG. 1.
Fig. 3 is a schematic view of the configuration of the ball and the pin of fig. 1.
Fig. 4 is another view angle structure diagram of fig. 2.
FIG. 5 is a schematic diagram of a liner structure according to an embodiment of the present invention.
FIG. 6 is a schematic cross-sectional view of a liner and cup according to an embodiment of the invention.
FIG. 7 is a schematic view of the taper configuration of a ball and a pin according to an embodiment of the invention.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples.
A personalized first metacarpal prosthesis, comprising a cup, a liner, a bulb and a marrow needle;
the cup is of a hemispherical structure, the top surface of the cup is a convex surface, and the bottom surface of the cup is a groove; the convex surface is provided with a plurality of convex structures for resisting rotation; the groove is circular, the bottom of the groove is concave, and the bottom of the groove and the side wall of the groove are in smooth transition; the side wall is provided with a ring groove; the center of the ring groove is positioned on the central shaft of the cup; an anti-rotation groove is arranged at the edge of the opening of the groove;
the lining is embedded in the groove of the cup; the outer surface of the lining is provided with an annular bulge which is embedded in the annular groove; the lower edge of the outer surface of the lining is provided with anti-rotation blocks which are matched with the anti-rotation grooves, and the anti-rotation grooves are in one-to-one correspondence with the anti-rotation blocks; the top surface of the cup is matched with the concave surface of the bottom of the groove; the bottom surface of the cup is provided with a ball socket;
the surface of the marrow needle is of a bone trabecula structure, the top end of the marrow needle is provided with a ball head which is matched with the marrow needle in a taper way, the ball head is in ball socket ball joint with the cup, and the movable angle of the ball joint is 90 degrees.
Further, the material of the mortar cup is titanium alloy, and the convex surface of the mortar cup is provided with a porous bone trabecula structure.
Further, the lining is made of vitamin E high-crosslinking ultra-high molecular weight polyethylene material.
Further, the annular bulge is provided with a fracture for preventing expansion caused by heat and contraction caused by cold.
Further, the ball head is made of cobalt-chromium-molybdenum or ceramic material.
Furthermore, the marrow needle is manufactured by adopting a 3D printing porous structure process.
Referring to fig. 1 to 7, the following is a more specific description:
the embodiment comprises four parts, namely a cup 1, a liner 2, a ball head 3 and a marrow needle 4, wherein the cup 1 and the liner 2 are of an embedded fixed structure and are relatively fixed without displacement, the liner 2 and the ball head 3 are of ball socket surface rotation, the activity angle is 90 degrees, and the ball head 3 and the marrow needle 4 are of a cone-matched structure as shown in fig. 6;
the cup 1 is placed into the trapezium bone, and the marrow needle 4 is placed into the first metacarpal bone;
the mortar cup 1 is made of titanium alloy materials and is manufactured by adopting a 3D printing porous structure process, 15 is a porous bone trabecula structure, and the 15 porous bone trabecula structure can form a good bone ingrowth effect with cancellous bone and cortical bone, so that the initial stability of the mortar cup is better, and 11, 12, 13 and 14 are boss structures, and play a role in stabilizing the mortar cup in trapezium bones; 11. 12, 13 and 14 are boss structures, which play a role in resisting rotation of the cup and prevent the displacement of the implanted cup and bones; the cup 1 is manufactured by three-dimensional software according to the bone physiological anatomy structure of a patient, accords with the disease condition of the patient, and can realize accurate individuation treatment, as shown in fig. 2;
the inner wall of the cup 1 is provided with a 16 structure, and the 16 structure is a groove structure, as shown in figure 4;
the lining 2 is made of vitamin E high-crosslinking ultra-high molecular weight polyethylene material, and has high wear resistance and strong anti-sliding friction capacity; impact resistance, high impact toughness value and strong impact resistance; corrosion resistance; self-lubricating property, and better recovery of relative motion between joints; no toxicity; the structure 21 is a boss structure, as shown in fig. 5;
the cup 1 and the liner 2 are meshed with each other through the structures of 16 and 21, and meanwhile, the cup 1 and the liner 2 are matched with each other in a taper ratio of 1:3 to form a stable structure, and the cup and the liner cannot relatively displace, as shown in figures 4 and 5;
the ball head 3 is made of ceramic material or cobalt chromium molybdenum material, has very good wear resistance and high hardness, and 31 is of a cone-matched structure;
the marrow needle 4 is made of titanium alloy material and is manufactured by adopting a 3D printing porous structure process, the 41 is a taper structure, the 42 is a porous bone trabecula structure, and the 42 porous bone trabecula structure can form a good bone ingrowth effect with cancellous bone and cortical bone, so that the initial stability of the marrow needle 4 after implantation is better; the marrow needle 4 is manufactured by three-dimensional software according to the bone physiological anatomy structure of the patient, accords with the lesion condition of the patient, and can realize accurate individuation treatment, as shown in figure 3;
the ball head 3 and the pin 4 are connected by a taper of 31 and 41 so that they do not move relative to each other, as shown in figures 3 and 7.
Claims (6)
1. A personalized first metacarpal prosthesis, which is characterized by comprising a cup, a lining, a bulb and a marrow needle;
the cup is of a hemispherical structure, the top surface of the cup is a convex surface, and the bottom surface of the cup is a groove; the convex surface is provided with a plurality of convex structures for resisting rotation; the groove is circular, the bottom of the groove is concave, and the bottom of the groove and the side wall of the groove are in smooth transition; the side wall is provided with a ring groove; the center of the ring groove is positioned on the central shaft of the cup; an anti-rotation groove is arranged at the edge of the opening of the groove;
the lining is embedded in the groove of the cup; the outer surface of the lining is provided with an annular bulge which is embedded in the annular groove; the lower edge of the outer surface of the lining is provided with anti-rotation blocks which are matched with the anti-rotation grooves, and the anti-rotation grooves are in one-to-one correspondence with the anti-rotation blocks; the top surface of the cup is matched with the concave surface of the bottom of the groove; the bottom surface of the cup is provided with a ball socket;
the surface of the marrow needle is of a bone trabecula structure, the top end of the marrow needle is provided with the ball head which is matched with the marrow needle in a taper way, the ball head is in ball socket ball joint with the cup, and the movable angle of the ball joint is 90 degrees.
2. The personalized first metacarpal prosthesis of claim 1, wherein the cup is made of titanium alloy and the convex surface of the cup is provided with a porous bone trabecular structure.
3. A personalized first metacarpal prosthesis according to claim 1, wherein the inner liner is vitamin E high cross-linked ultra high molecular weight polyethylene material.
4. The personalized first metacarpal prosthesis of claim 1, wherein the annular protrusion is provided with a break for preventing thermal expansion and contraction.
5. A personalized first metacarpal prosthesis according to claim 1, wherein the bulb is cobalt chrome molybdenum or a ceramic material.
6. A personalized first metacarpal prosthesis according to claim 1, wherein the intramedullary nail is manufactured using a 3D printing porous structure process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311290364.3A CN117426907A (en) | 2023-10-08 | 2023-10-08 | Personalized first metacarpal prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311290364.3A CN117426907A (en) | 2023-10-08 | 2023-10-08 | Personalized first metacarpal prosthesis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117426907A true CN117426907A (en) | 2024-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311290364.3A Pending CN117426907A (en) | 2023-10-08 | 2023-10-08 | Personalized first metacarpal prosthesis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117426907A (en) |
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2023
- 2023-10-08 CN CN202311290364.3A patent/CN117426907A/en active Pending
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