FR2926212A1 - Prosthetic articulation implant for bones, has hemispherical head with arrangements cooperating with extraction unit for extracting head with respect to collar from polar zone of head, where extraction unit is constituted by return spring - Google Patents

Prosthetic articulation implant for bones, has hemispherical head with arrangements cooperating with extraction unit for extracting head with respect to collar from polar zone of head, where extraction unit is constituted by return spring Download PDF

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Publication number
FR2926212A1
FR2926212A1 FR0850239A FR0850239A FR2926212A1 FR 2926212 A1 FR2926212 A1 FR 2926212A1 FR 0850239 A FR0850239 A FR 0850239A FR 0850239 A FR0850239 A FR 0850239A FR 2926212 A1 FR2926212 A1 FR 2926212A1
Authority
FR
France
Prior art keywords
head
base
implant according
hole
extraction unit
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.)
Granted
Application number
FR0850239A
Other languages
French (fr)
Other versions
FR2926212B1 (en
Inventor
Jean Michel Peguet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EVOLUTIS SA
Original Assignee
EVOLUTIS SA
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Filing date
Publication date
Application filed by EVOLUTIS SA filed Critical EVOLUTIS SA
Priority to FR0850239A priority Critical patent/FR2926212B1/en
Publication of FR2926212A1 publication Critical patent/FR2926212A1/en
Application granted granted Critical
Publication of FR2926212B1 publication Critical patent/FR2926212B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4637—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3601—Femoral heads ; Femoral endoprostheses for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices
    • A61F2/3603—Femoral heads ; Femoral endoprostheses for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices implanted without ablation of the whole natural femoral head
    • 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
    • A61F2/40—Joints for shoulders
    • A61F2/4003—Replacing only the epiphyseal or metaphyseal parts of the humerus, i.e. endoprosthesis not comprising an entire humeral shaft
    • 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
    • A61F2/40—Joints for shoulders
    • A61F2/4081—Glenoid components, e.g. cups
    • 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
    • A61F2/4225—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for feet, e.g. toes
    • 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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    • 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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    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3601—Femoral heads ; Femoral endoprostheses for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices
    • 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
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
    • 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
    • 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
    • A61F2002/30433—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
    • 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
    • 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
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
    • 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
    • A61F2002/30774—Apertures or holes, e.g. of circular cross section internally-threaded
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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
    • A61F2002/3079—Stepped or enlarged apertures, e.g. having discrete diameter changes
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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
    • A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
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    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3611—Heads or epiphyseal parts of femur
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    • A61F2/02—Prostheses implantable into the body
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    • A61F2/4003—Replacing only the epiphyseal or metaphyseal parts of the humerus, i.e. endoprosthesis not comprising an entire humeral shaft
    • A61F2002/4007—Replacing only the epiphyseal or metaphyseal parts of the humerus, i.e. endoprosthesis not comprising an entire humeral shaft implanted without ablation of the whole natural humeral head
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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
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    • A61F2/02—Prostheses implantable into the body
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    • A61F2/4225—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for feet, e.g. toes
    • A61F2002/4233—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for feet, e.g. toes for metatarso-phalangeal joints, i.e. MTP joints
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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
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    • A61F2/4241—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for hands, e.g. fingers
    • A61F2002/4251—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for hands, e.g. fingers for metacarpo-phalangeal joints, i.e. MCP or MP joints, e.g. knuckle joints
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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
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    • 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
    • A61F2002/4258—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 for trapezo-metacarpal joints of thumbs
    • 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
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2002/4629—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof connected to the endoprosthesis or implant via a threaded connection
    • 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
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4637—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis
    • A61F2002/4641—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis for disconnecting
    • 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
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
    • 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
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0041—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels or rivets, e.g. connecting screws
    • 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
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00179—Ceramics or ceramic-like structures
    • 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
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00179—Ceramics or ceramic-like structures
    • A61F2310/00185—Ceramics or ceramic-like structures based on metal oxides
    • A61F2310/00203—Ceramics or ceramic-like structures based on metal oxides containing alumina or aluminium oxide

Abstract

The implant has a fixation collar (2) for receiving a hemispherical head (1) made of ceramic. The head includes arrangements cooperating with an extraction unit (4) for extracting the hemispherical head with respect to the collar from a polar zone of the head, where the extraction unit is constituted by a return spring. A base of the head includes a circular recess for housing the collar such that the head is in a tangent position with a bone cut of a part of the corresponding bone without being in contact with the bone.

Description

L'invention se rattache au secteur technique des implants orthopédiques d'articulation entre deux os. The invention relates to the technical sector of orthopedic implants for articulation between two bones.

Plus particulièrement, l'invention concerne un implant de resurfaçage ayant pour objectif, de manière connue, de retirer simplement le cartilage et le moins d'os possible, et trouve une application dans le domaine des articulations de la hanche, de l'épaule anatomique ou inversée, interphalangiennes, trapézométacarpiennes, ... More particularly, the invention relates to a resurfacing implant with the aim, in known manner, of simply removing the cartilage and the least possible bone, and finds application in the field of hip joints, the anatomical shoulder or inverted, interphalangeal, trapezometacarpal, ...

Cette technique de remplacement articulaire est généralement utilisée pour des sujets souffrant d'arthrose au niveau de l'articulation considérée. Cette technique de resurfaçage permet de : - préserver au maximum le capital osseux du patient. ; - augmenter la mobilité sans risque de luxation ; - respecter les volumes articulaires naturels et la proprioceptivité. This joint replacement technique is generally used for subjects suffering from osteoarthritis in the joint concerned. This resurfacing technique makes it possible: - to preserve as much as possible the bone capital of the patient. ; - increase mobility without risk of dislocation; - to respect the natural articular volumes and the proprioceptivity.

Par exemple, une prothèse de resurfaçage comprend une tête, sous forme sensiblement d'une demi-sphère, équipée d'une tige destinée à être fixée dans la partie d'os considérée. Ou bien, la tête demi-sphérique est rendue solidaire d'une embase qui prend appui sur la coupe osseuse réalisée, en étant fixée sur cette dernière. Ainsi, la tête est réalisée dans un matériau présentant des qualités tribologiques élevées et l'embase dans un autre matériau reconnu pour ses qualités d'accroche osseuse. For example, a resurfacing prosthesis comprises a head, substantially in the shape of a hemisphere, equipped with a rod intended to be fixed in the part of bone considered. Or, the half-spherical head is secured to a base which is supported on the bone cut made, being fixed on the latter. Thus, the head is made of a material having high tribological qualities and the base in another material known for its qualities of bone grip.

Afin d'obtenir une usure très limitée dans le temps, on a pu constater que l'utilisation d'une tête en céramique et dont le diamètre est sensiblement égal à celui de l'articulation anatomique, donne satisfaction. In order to obtain a very limited wear over time, it has been found that the use of a ceramic head and whose diameter is substantially equal to that of the anatomical joint, gives satisfaction.

Avec ce type d'implant, l'un des problèmes qu'il convient de résoudre est d'assurer une fixation fiable de la tête hémisphérique par rapport à l'embase elle-même fixée au niveau de la coupe osseuse avec pour objectif d'éviter tout conflit avec l'os, notamment lorsque l'articulation est en mouvement. With this type of implant, one of the problems that must be solved is to ensure a reliable fixation of the hemispherical head relative to the base itself fixed at the level of the bone section with the objective of avoid any conflict with the bone, especially when the joint is moving.

Un autre problème qu'il convient de résoudre est de pouvoir assurer l'extraction de la tête, sans la briser, les fragments de céramique étant dangereux, en considérant que, en l'espèce, la tête hémisphérique est sensiblement en appui au niveau de la coupe osseuse, de sorte qu'il n'y a pas d'accès pour le passage d'un outil permettant d'exercer un effort de frappe en vue de l'extraction, par le dessous, de la tête par rapport à l'embase. Another problem that must be solved is to be able to ensure the extraction of the head, without breaking it, the ceramic fragments being dangerous, considering that, in this case, the hemispherical head is substantially supported at the level of the bone cutting, so that there is no access for the passage of a tool for exerting a strike force for the extraction, from below, of the head relative to the 'base.

Les solutions proposées à ce jour ne donnent pas satisfaction, notamment pour l'extraction de la tête hémisphérique par rapport à l'embase. The solutions proposed to date are not satisfactory, especially for the extraction of the hemispherical head relative to the base.

Le double problème que se propose de résoudre l'invention, dans le cas notamment d'une prothèse de resurfaçage, est de garantir un parfait assemblage en évitant le contact de la tête en céramique avec l'os et de pouvoir assurer facilement le démontage de la tête en céramique par rapport à l'embase, notamment lorsque l'assemblage entre la tête et l'embase est du type cône-morse. The double problem that the invention proposes to solve, in the case in particular of a resurfacing prosthesis, is to guarantee a perfect assembly by avoiding the contact of the ceramic head with the bone and to be able to easily ensure the disassembly of the ceramic head relative to the base, especially when the assembly between the head and the base is of the cone-walrus type.

Pour résoudre ces différents problèmes, l'implant prothétique d'articulation comprend une embase de fixation osseuse recevant une tête hémisphérique d'un diamètre sensiblement équivalent au volume de l'articulation, ladite tête présentant des agencements aptes à coopérer avec divers organes conformés pour assurer, à partir de la zone polaire de la tête, la préhension, l'impaction, l'extraction de ladite tête par rapport à l'embase. To solve these various problems, the prosthetic joint implant comprises a bone fixation base receiving a hemispherical head of a diameter substantially equivalent to the volume of the joint, said head having arrangements adapted to cooperate with various shaped members to ensure , from the polar zone of the head, the gripping, the impaction, the extraction of said head relative to the base.

A titre indicatif, le diamètre de la tête est compris entre 40 mm et 60 mm pour la hanche, entre 32 mm et 42 mm l'épaule, entre 8 mm et 15 mm pour le pied et la main. As an indication, the diameter of the head is between 40 mm and 60 mm for the hip, between 32 mm and 42 mm shoulder, between 8 mm and 15 mm for the foot and hand.

Selon une autre caractéristique, pour résoudre le problème posé d'obtenir une bonne longévité de l'assemblage entre la tête et l'embase, en évitant tout phénomène de casse de la tête hémisphérique, la base de la tête présente un évidement circulaire pour le logement de l'embase de fixation,de sorte que ladite tête est sensiblement en position de tangence avec la coupe osseuse de la partie d'os correspondante, sans être en contact. According to another characteristic, to solve the problem of obtaining a good life of the assembly between the head and the base, avoiding any breakage phenomenon of the hemispherical head, the base of the head has a circular recess for the housing the mounting base, so that said head is substantially in tangent position with the bone section of the corresponding bone part, without being in contact.

Avantageusement, l'embase présente une tige en complément de la fixation dans la coupe osseuse de l'os considéré. Advantageously, the base has a rod in addition to the fixation in the bone section of the bone in question.

Selon une autre caractéristique, notamment pour résoudre le problème posé d'assurer l'extraction de la tête hémisphérique par rapport à l'embase, à partir du dessus de ladite tête, les agencements sont constitués par un trou débouchant formé coaxialement dans l'épaisseur de la tête et coopérant avec l'extrémité d'une portée mâle que présente l'embase. L'engagement d'une tige d'appui que présente l'organe de préhension pour l'extraction de la tête, suite à son déplacement vers le bas au travers dudit organe faisant office de pince, assure cette fonction d'extracteur. According to another characteristic, in particular to solve the problem of ensuring the extraction of the hemispherical head relative to the base, from the top of said head, the arrangements are constituted by a through hole formed coaxially in the thickness. of the head and cooperating with the end of a male bearing that presents the base. The engagement of a support rod that presents the gripping member for the extraction of the head, following its downward movement through said member acting as a clamp, provides this extractor function.

Dans cette conception, le trou débouchant présente, à partir de la base de la tête, une portée tronconique pour l'engagement de la portée de centrage de l'embase, de section complémentaire, afin de réaliser un assemblage du type cône-morse. Afin d'assurer un parfait guidage avant coincement, cette portée est d'une longueur supérieure à 50 % de son diamètre moyen. In this design, the opening hole has, from the base of the head, a frustoconical surface for the engagement of the centering bearing surface of the base, of complementary section, in order to achieve a cone-walrus type assembly. To ensure perfect guidance before jamming, this range is greater than 50% of its average diameter.

D'une manière importante, le trou débouchant de la tête hémisphérique permet le montage d'un instrument spécifique permettant d'assurer la bonne fixation de la tête par rapport à l'embase avec pour objectif de pouvoir contrôler l'enfoncement de la tête afin que cette dernière soit sensiblement en position de tangence avec la coupe osseuse de la partie d'os correspondante, sans que le contact avec cette dernière n'empêche le parfait coincement de l'assemblage par cône-morse. Importantly, the hole opening of the hemispherical head allows the mounting of a specific instrument to ensure the correct attachment of the head relative to the base with the objective of being able to control the depression of the head to that the latter is substantially tangent position with the bone section of the corresponding bone part, without the contact with the latter does not prevent the perfect jamming of the cone-walrus assembly.

Pour améliorer la fixation, le chambrage de la portée de centrage peut être taraudé pour recevoir une vis de sécurité engagée à partir de l'extrémité du trou de la tête. La tête de cette vis est proche de la tête en fin de vissage, sans être en contact pour éviter tout risque d'éclatement dans le cas où la tête est en céramique. To improve the fixation, the recess of the centering surface can be tapped to receive a security screw engaged from the end of the hole of the head. The head of this screw is close to the head at the end of screwing, without being in contact to avoid any risk of bursting in the case where the head is ceramic.

Selon d'autres caractéristiques : - la portée tronconique de la tête est prolongée par une portée cylindrique, elle-même prolongée par une autre portée cylindrique de diamètre inférieur, de manière à constituer un épaulement interne pour l'accrochage de l'extrémité de la pince ; - le chambrage de la portée de centrage est prolongé par un trou débouchant formé coaxialement à la tige ; - la tête est en céramique et présente un diamètre supérieur à 40 mm pour la hanche, à 30 mm pour l'épaule et à 8 mm pour le pied et la main. 25 L'invention est exposée ci-après plus en détail à l'aide des figures des dessins annexés dans lesquels : - la figure 1 est une vue en coupe longitudinale de l'implant de resurfaçage fixé au niveau de la coupe osseuse de la partie d'os considérée ; - la figure 2 est une vue semblable à la figure 1, l'assemblage du type cône-morse entre la tête hémisphérique et l'embase étant complété par une vis ; - la figure 3 est une vue longitudinale montrant l'utilisation d'un instrument pour la mise en place de la tête hémisphérique au niveau de l'embase en ayant pour objectif de contrôler l'enfoncement de ladite tête hémisphérique ; - la figure 4 est une vue en coupe longitudinale de l'implant avant mise en place de l'outil d'extraction de la tête hémisphérique ; - la figure 5 est une vue correspondant à la figure 4 après mise en place de l'outil pour l'extraction de la tête hémisphérique par rapport à l'embase ; - la figure 6 montre un exemple d'utilisation de l'implant prothétique de resurfaçage dans le cas d'un fémur. On a illustré, aux figures des dessins, un implant prothétique de resurfaçage destiné à être fixé au niveau d'une coupe osseuse (01) de l'os considéré (0), en rappelant que l'implant peut être utilisé pour tout type d'articulation, notamment pour l'articulation de : - la hanche, en étant fixé au niveau de la tête du fémur (figure 6) ; - l'épaule en étant fixé au niveau de la tête de l'humérus ou de la cavité glénoïdienne ; - de la main, en étant fixé au niveau des articulations métacarpophalangiennes ou trapézométacarpiennes ; - du pied en étant fixé au niveau des articulations métatarsophalangiennes. According to other characteristics: the frustoconical bearing surface of the head is extended by a cylindrical bearing, itself extended by another cylindrical bearing surface of smaller diameter, so as to constitute an internal shoulder for fastening the end of the clip; - The recess of the centering surface is extended by a through hole formed coaxially with the rod; - the head is ceramic and has a diameter greater than 40 mm for the hip, 30 mm for the shoulder and 8 mm for the foot and hand. The invention will now be explained in more detail with the aid of the figures of the accompanying drawings in which: FIG. 1 is a longitudinal sectional view of the resurfacing implant attached to the bone section of the part of bone considered; - Figure 2 is a view similar to Figure 1, the cone-walrus type assembly between the hemispherical head and the base being completed by a screw; - Figure 3 is a longitudinal view showing the use of an instrument for the establishment of the hemispherical head at the base with the objective of controlling the depression of said hemispherical head; - Figure 4 is a longitudinal sectional view of the implant before introduction of the extraction tool of the hemispherical head; - Figure 5 is a view corresponding to Figure 4 after installation of the tool for extracting the hemispherical head relative to the base; FIG. 6 shows an example of use of the prosthetic resurfacing implant in the case of a femur. The figures of the drawings show a prosthetic resurfacing implant intended to be fixed at a bone section (01) of the bone in question (0), recalling that the implant can be used for any type of implant. articulation, especially for the articulation of: - the hip, being fixed at the level of the head of the femur (Figure 6); - the shoulder being fixed at the level of the head of the humerus or glenoid cavity; - of the hand, being fixed at the level of the metacarpophalangeal or trapezometacarpal joints; - the foot being fixed at the metatarsophalangeal joints.

L'implant comprend une tête céramique hémisphérique (1) sensiblement sous forme d'une demi-sphère destinée à être fixée sur une embase (2). L'embase (2) présente une partie d'appui (2a) coopérant avec la coupe osseuse (01). Cette partie d'appui peut être légèrement bombée. La fixation de l'embase (2) de la partie d'os considérée, s'effectue par divers moyens, tels qu'une tige coaxiale (2b) de volume réduit. De l'autre côté de la tige (2b), l'embase (2) présente une portée mâle de centrage (2c) destinée à coopérer avec une portée femelle complémentaire (la) que présente la tête (1). Un taraudage (2c1) est formé dans la portée de centrage (2c). La portée femelle (la) est formée coaxialement à partir d'un évidement circulaire (1 c) formé à la base de la tête (1) et destiné à permettre le logement de la partie d'appui et de fixation (2a) de l'embase (2). The implant comprises a hemispherical ceramic head (1) substantially in the form of a hemisphere intended to be fixed on a base (2). The base (2) has a bearing portion (2a) cooperating with the bone section (01). This support portion may be slightly curved. The attachment of the base (2) of the considered bone part is effected by various means, such as a coaxial rod (2b) of reduced volume. On the other side of the rod (2b), the base (2) has a centering male bearing (2c) intended to cooperate with a complementary female surface (la) that the head (1). A tapping (2c1) is formed in the centering surface (2c). The female bearing (la) is formed coaxially from a circular recess (1c) formed at the base of the head (1) and intended to allow the housing of the support and fixing part (2a) of the base (2).

Les deux portées mâle et femelle (2c) et (la) et présentent une conicité complémentaire de l'ordre de 6° pour assurer un assemblage du type cône-morse entre la tête (1) et l'embase (2). La portée tronconique (la) et d'une longueur supérieure à 50 % de son diamètre moyen. Both male and female surfaces (2c) and (la) and have a complementary taper of the order of 6 ° to ensure a cone-walrus type assembly between the head (1) and the base (2). The frustoconical span (la) and a length greater than 50% of its average diameter.

Selon une caractéristique importante de l'invention, la portée tronconique (la) fait partie d'un trou débouchant (lb) formé coaxialement dans l'épaisseur de la tête (1). Plus particulièrement, dans la forme de réalisation illustrée, la portée tronconique de centrage (la) de la tête est prolongée par une portée cylindrique (lb 1), elle-même prolongée par une autre portée cylindrique (1b2) de diamètre inférieur, de manière à constituer un épaulement interne (lb3). Comme indiqué ci-après, ces différents agencements au niveau de la tête (1) et de l'embase (2), permettent la mise en place d'un instrument de préhension (3) pour la fixation, de manière précise et sure de la tête (1) sur l'embase (2) et d'un organe d'extraction (4) conformé pour assurer, à partir de la zone polaire de la tête, son extraction par rapport à l'embase. According to an important characteristic of the invention, the frustoconical bearing surface (la) is part of a through-hole (1b) formed coaxially in the thickness of the head (1). More particularly, in the illustrated embodiment, the frustoconical centering bearing surface (la) of the head is extended by a cylindrical bearing surface (Ib 1), itself extended by another cylindrical bearing surface (1b2) of smaller diameter, so that to constitute an internal shoulder (lb3). As indicated below, these different arrangements at the head (1) and the base (2), allow the establishment of a gripping instrument (3) for fixing, accurately and safely the head (1) on the base (2) and an extraction member (4) shaped to ensure, from the polar zone of the head, its extraction relative to the base.

Dans la forme de réalisation illustrée (figure 3), l'appareil de mise en place (3) comprend une tige (3a) destinée à être engagée dans le trou (lb) en appui sur la portée de centrage (2c) de l'embase. Sur cette tige (3a), est monté, avec capacité de coulissement guidé à l'encontre d'un ressort de rappel (4), un fourreau (3b). Le fourreau (3b) est réalisé dans un matériau tendre, tel que du plastique et son extrémité est évasée et profilée en (3b1) pour prendre appui sur l'extérieur de la tête demi-sphérique, sans l'endommager. La tige (3a) étant en butée contre la portée (2c), un appui exercé sur le fourreau (3b) permet l'enfoncement contrôlé de la tête (1) par rapport à l'embase (2) jusqu'à l'assemblage par cône-morse de (la) dans (2c). Un repère (3d) permet de vérifier que la base de ladite tête se trouve alors sensiblement en position de tangence avec la coupe osseuse (01), sans être en contact avec cette dernière (figure 3). In the illustrated embodiment (FIG. 3), the placing apparatus (3) comprises a rod (3a) intended to be engaged in the hole (1b) bearing on the centering bearing surface (2c) of the base. On this rod (3a) is mounted, with sliding capacity guided against a return spring (4), a sleeve (3b). The sheath (3b) is made of a soft material, such as plastic and its end is flared and profiled (3b1) to bear on the outside of the half-spherical head, without damaging it. The rod (3a) being in abutment against the bearing surface (2c), a bearing exerted on the sheath (3b) allows the controlled depression of the head (1) relative to the base (2) until the assembly by taper-walrus of (la) in (2c). A mark (3d) makes it possible to verify that the base of said head is then substantially in position of tangency with the bone section (01), without being in contact with the latter (FIG. 3).

Le repère (3d) est solidaire de la tige (3a) et coulisse dans une fenêtre (3e) aménagée dans le fourreau (3b). Une gravure (3f) indique la position recherchée. The mark (3d) is integral with the rod (3a) and slides in a window (3e) arranged in the sleeve (3b). An engraving (3f) indicates the desired position.

A noter que le chambrage (2c1) de la portée (2c) peut être taraudé pour recevoir une vis de fixation (6) engagée à partir de l'extrémité du trou (lb) de la tête (figure 2), afin de sécuriser l'assemblage cône-mors. Dans ce cas, le trou taraudé peut permettre le vissage de l'embout fileté d'un instrument de mise en place et/ou d'extraction de l'embase (2). Note that the recess (2c1) of the seat (2c) can be tapped to receive a fixing screw (6) engaged from the end of the hole (lb) of the head (Figure 2), to secure the l cone-jaw assembly. In this case, the tapped hole may allow the screwing of the threaded end of an instrument for placing and / or extracting the base (2).

L'organe de préhension (4) pour l'extraction de la tête (1) par rapport à l'embase (2) comprend, dans la forme de réalisation illustrée aux figures 4 et 5, une tige (4a) engagée librement dans un fourreau (4b) avec capacité de coulissement coaxial et dont l'extrémité constitue une pince (4b1). La pince (4b1) est destinée à être engagée dans le trou (lb) de la tête (1), de sorte que son extrémité, qui constitue un bourrelet, coopère avec l'épaulement interne (1b3) de la tête. La tige (4a) est introduite dans la pince pour expandre la pièce et la maintenir ouverte de sorte qu'il suffit de tirer vers le haut le fourreau (4b) pour permettre le désaccouplement des deux portées d'assemblage (2c) et (la) et par conséquent l'extraction de la tête (1). Afin de faciliter la manoeuvre, l'extrémité libre de la tige (4a) est avantageusement équipée d'une poignée (4d) et d'un filetage (4c). The gripping member (4) for extracting the head (1) relative to the base (2) comprises, in the embodiment illustrated in Figures 4 and 5, a rod (4a) freely engaged in a sheath (4b) with coaxial sliding capacity and the end of which constitutes a clamp (4b1). The clamp (4b1) is intended to be engaged in the hole (1b) of the head (1), so that its end, which constitutes a bead, cooperates with the inner shoulder (1b3) of the head. The rod (4a) is inserted into the clamp to expand the workpiece and keep it open so that it is sufficient to pull up the sheath (4b) to allow the uncoupling of the two connecting surfaces (2c) and (the ) and therefore the extraction of the head (1). To facilitate the operation, the free end of the rod (4a) is advantageously equipped with a handle (4d) and a thread (4c).

Selon une autre caractéristique, la tête (1) est en céramique et présente un diamètre important, notamment par rapport à la tige d'ancrage (2b) de l'embase. A titre indicatif, la céramique est de l'alumine et le diamètre de la tête (1) est proche du diamètre de la tête osseuse de l'articulation prothésée, tandis que celui de la tige est au moins 3 fois moindre. Ainsi, la tête présente un diamètre supérieur à 40 mm pour la hanche, à 30 mm pour l'épaule et à 8 mm pour le pied et la main. A noter que la tige d'ancrage (2b) peut présenter un trou débouchant (2b1) formé coaxialement au taraudage (2c1) pour l'introduction d'une tige de centrage. According to another characteristic, the head (1) is ceramic and has a large diameter, especially with respect to the anchor rod (2b) of the base. As an indication, the ceramic is alumina and the diameter of the head (1) is close to the diameter of the bone head of the prosthetic joint, while that of the stem is at least 3 times smaller. Thus, the head has a diameter greater than 40 mm for the hip, 30 mm for the shoulder and 8 mm for the foot and hand. Note that the anchor rod (2b) may have a through hole (2b1) formed coaxially with the thread (2c1) for the introduction of a centering rod.

Les avantages ressortent bien de la description, en particulier on souligne et on rappelle : - l'utilisation d'une tête céramique, en évitant tout risque de conflit avec l'os, étant donné que l'on peut maîtriser, en utilisant un assemblage du type cône-morse, son positionnement par rapport à l'embase d'appui et de fixation ; - la possibilité d'extraction de la tête par le dessus, en exerçant un effort de traction sur la tête, sans la briser ; - l'utilisation de têtes de diamètre important reproduisant au mieux les caractéristiques anatomiques de mobilité, de stabilité et de 5 proprioceptivité. The advantages are apparent from the description, in particular it emphasizes and recalls: - the use of a ceramic head, avoiding any risk of conflict with the bone, since we can control, using an assembly of the cone-walrus type, its positioning relative to the support and fixing base; - the possibility of extraction of the head from above, by exerting a tensile force on the head, without breaking it; the use of heads of large diameter reproducing at best the anatomical characteristics of mobility, stability and proprioceptivity.

Claims (1)

REVENDICATIONS - 1- Implant prothétique d'articulation entre deux os comprenant une embase de fixation (2) recevant une tête hémisphérique (1), caractérisé en ce que ladite tête (1) est en céramique et présente des agencements aptes à coopérer avec un organe (4) conformé pour assurer, à partir de la zone polaire de la tête (1), l'extraction de ladite tête (1) par rapport à l'embase (2). -2- Implant selon la revendication 1, caractérisé en ce que la base de la tête (1) présente un évidement circulaire (1c) pour le logement de l'embase de fixation (2), de sorte que ladite tête (1) est sensiblement en position de tangence avec la coupe osseuse de la partie d'os correspondante, sans être en contact. - 3- Implant selon l'une quelconque des revendications 1 et 2, caractérisé en ce que l'embase (2) présente une tige de fixation (2b) dans la coupe osseuse. - 4- Implant selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les agencements sont constitués par un trou débouchant (lb) formé coaxialement dans l'épaisseur de la tête (1) et coopérant avec une portée de centrage coaxiale (2c) que présente l'embase (2), ledit trou présentant une portée cylindrique (lb 1), elle-même prolongée par une autre portée cylindrique de diamètre inférieur (lb2), de manière à constituer un épaulement interne (1b3) pour l'accrochage de l'extrémité d'une pince (4b1) que présente une partie (4b) de l'organe (4). - 5- Implant selon la revendication 4, caractérisé en ce que le trou débouchant (lb) présente, à partir de la base de la tête, une portée tronconique (la) pourl'engagement de la portée de centrage (2c) de l'embase (2), de section complémentaire, afin de réaliser un assemblage du type cône-morse. - 6- Implant selon la revendication 4, caractérisé en ce que la portée tronconique (la) est d'une longueur supérieure à 50 % de son diamètre moyen. - 7- Implant selon la revendication 4, caractérisé en ce que la portée de centrage (2c) est taraudée pour recevoir une vis de fixation engagée à partir de l'extrémité du trou (lb) de la tête (1). - 8- Implant selon l'une quelconque des revendications 4 à 6, caractérisé en ce que la portée tronconique (la) de la tête et la portée cylindrique (lb 1) sont formées pour l'engagement d'une tige d'appui (4a) que présente l'organe (4) pour l'extraction de la tête suite à un déplacement vers le bas de la partie (4b) dudit organe faisant office de pince (4b1) et engagé à l'extrémité du trou (lb) de la tête (1). - 9- Implant selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le taraudage (2c 1) de la portée de centrage est prolongé par un trou débouchant (2b1) formé coaxialement à une tige (2b) que présente l'embase (2). - 10- Implant selon l'une quelconque des revendications 1 à 9, caractérisé en ce que la tête présente un diamètre supérieur à 40 mm pour la hanche, à 30 mm pour l'épaule et à 8 mm pour le pied et la main. - 1 prosthetic implant for articulation between two bones comprising a fixing base (2) receiving a hemispherical head (1), characterized in that said head (1) is ceramic and has arrangements adapted to cooperate with a body ( 4) shaped to ensure, from the polar zone of the head (1), the extraction of said head (1) relative to the base (2). -2- Implant according to claim 1, characterized in that the base of the head (1) has a circular recess (1c) for the housing of the mounting base (2), so that said head (1) is substantially in tangent position with the bone section of the corresponding bone part, without being in contact. - 3-implant according to any one of claims 1 and 2, characterized in that the base (2) has a fixing rod (2b) in the bone section. Implant according to any one of claims 1 to 3, characterized in that the arrangements consist of a through-hole (1b) formed coaxially in the thickness of the head (1) and co-operating with a coaxial centering surface. (2c) that has the base (2), said hole having a cylindrical bearing (Ib 1), itself extended by another cylindrical seat of smaller diameter (lb2), so as to form an internal shoulder (1b3) for gripping the end of a clamp (4b1) that has a portion (4b) of the member (4). Implant according to claim 4, characterized in that the through hole (1b) has, from the base of the head, a frustoconical bearing surface (1a) for engaging the centering bearing surface (2c) of the base (2), of complementary section, in order to achieve a cone-walrus type assembly. - 6- Implant according to claim 4, characterized in that the frustoconical bearing surface (la) is of a length greater than 50% of its mean diameter. Implant according to claim 4, characterized in that the centering surface (2c) is threaded to receive a fixing screw engaged from the end of the hole (1b) of the head (1). Implant according to any one of Claims 4 to 6, characterized in that the frustoconical bearing surface (la) of the head and the cylindrical bearing surface (Ib 1) are formed for the engagement of a support rod ( 4a) that presents the member (4) for the extraction of the head following a downward movement of the portion (4b) of said member acting clamp (4b1) and engaged at the end of the hole (lb) of the head (1). Implant according to any one of claims 1 to 8, characterized in that the tapping (2c 1) of the centering surface is extended by a through hole (2b1) formed coaxially with a rod (2b) that presents the base (2). Implant according to any one of claims 1 to 9, characterized in that the head has a diameter greater than 40 mm for the hip, 30 mm for the shoulder and 8 mm for the foot and hand.
FR0850239A 2008-01-16 2008-01-16 PROTHETIC IMPLANT FOR JOINT BETWEEN TWO BONES COMPRISING A FIXING BASE RECEIVING A HEMISPHERIC HEAD Expired - Fee Related FR2926212B1 (en)

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US9737405B2 (en) 2011-04-06 2017-08-22 DePuy Synthes Products, Inc. Orthopaedic surgical procedure for implanting a revision hip prosthesis
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US9949833B2 (en) 2011-04-06 2018-04-24 DePuy Synthes Products, Inc. Finishing RASP and orthopaedic surgical procedure for using the same to implant a revision hip prosthesis
US10064725B2 (en) 2011-04-06 2018-09-04 DePuy Synthes Products, Inc. Distal reamer for use during an orthopaedic surgical procedure to implant a revision hip prosthesis
US10925739B2 (en) 2011-04-06 2021-02-23 DePuy Synthes Products, Inc. Version-replicating instrument and orthopaedic surgical procedure for using the same to implant a revision hip prosthesis
US10888427B2 (en) 2011-04-06 2021-01-12 DePuy Synthes Products, Inc. Distal reamer for use during an orthopaedic surgical procedure to implant a revision hip prosthesis
US8696758B2 (en) 2011-04-06 2014-04-15 DePuy Synthes Products, LLC Revision hip prosthesis having an implantable distal stem component
US10226345B2 (en) 2011-04-06 2019-03-12 DePuy Synthes Products, Inc. Version-replicating instrument and orthopaedic surgical procedure for using the same to implant a revision hip prosthesis
US9504578B2 (en) 2011-04-06 2016-11-29 Depuy Synthes Products, Inc Revision hip prosthesis having an implantable distal stem component
US10603173B2 (en) 2011-04-06 2020-03-31 DePuy Synthes Products, Inc. Orthopaedic surgical procedure for implanting a revision hip prosthesis
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US10751198B2 (en) 2015-07-27 2020-08-25 Hip Innovation Technology, LLC Tool and method for removing an acetabular ball from an acetabular cup in a hip replacement prosthesis
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AU2016298565B2 (en) * 2015-07-27 2020-11-12 Hip Innovation Technology, LLC Tool and method for removing an acetabular ball from an acetabular cup in a hip replacement prosthesis
US11020243B2 (en) 2015-07-27 2021-06-01 Hip Innovation Technology, Llc. Tool and method for removing an acetabular ball from an acetabular cup in a hip replacement prosthesis
US11826267B2 (en) 2017-04-12 2023-11-28 Depuy Ireland Unlimited Company Femoral trialling kit and assembly
US10675154B2 (en) 2017-04-14 2020-06-09 Bone And Joint Solutions Sa Osteochondral local prosthetic insert
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