WO2022010446A1 - Prothèse de tête radiale - Google Patents

Prothèse de tête radiale Download PDF

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Publication number
WO2022010446A1
WO2022010446A1 PCT/TR2021/050709 TR2021050709W WO2022010446A1 WO 2022010446 A1 WO2022010446 A1 WO 2022010446A1 TR 2021050709 W TR2021050709 W TR 2021050709W WO 2022010446 A1 WO2022010446 A1 WO 2022010446A1
Authority
WO
WIPO (PCT)
Prior art keywords
radial head
head prosthesis
connecting member
prosthesis
spring
Prior art date
Application number
PCT/TR2021/050709
Other languages
English (en)
Inventor
Halil Can GEMALMAZ
Original Assignee
Acibadem Mehmet Ali Aydinlar Universitesi
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Acibadem Mehmet Ali Aydinlar Universitesi filed Critical Acibadem Mehmet Ali Aydinlar Universitesi
Publication of WO2022010446A1 publication Critical patent/WO2022010446A1/fr

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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
    • A61F2/38—Joints for elbows or knees
    • A61F2/3804—Joints for elbows or knees for elbows
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/3094—Designing or manufacturing processes
    • A61F2/30942—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
    • 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
    • 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
    • A61F2002/30331—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
    • A61F2002/30354—Cylindrically-shaped protrusion and recess, e.g. cylinder of circular basis
    • 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
    • A61F2002/30362—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 with possibility of relative movement between the protrusion and the 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
    • A61F2002/30331—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
    • A61F2002/30362—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 with possibility of relative movement between the protrusion and the recess
    • A61F2002/3037—Translation along the common longitudinal axis, e.g. piston
    • 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
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30565—Special structural features of bone or joint prostheses not otherwise provided for having spring elements
    • 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
    • A61F2002/30565—Special structural features of bone or joint prostheses not otherwise provided for having spring elements
    • A61F2002/30566—Helical springs
    • 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
    • A61F2002/30535—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
    • 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
    • A61F2/30942—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
    • A61F2002/30952—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques using CAD-CAM techniques or NC-techniques
    • 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
    • A61F2/3094—Designing or manufacturing processes
    • A61F2002/30985—Designing or manufacturing processes using three dimensional printing [3DP]
    • 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
    • A61F2/38—Joints for elbows or knees
    • A61F2/3804—Joints for elbows or knees for elbows
    • A61F2002/3827—Radial components

Definitions

  • the present invention relates to a prosthesis for repairing radial head bone in an arm elbow joint with impaired originality due to fracture or osteoarthritis.
  • the radius is one of the bones in the forearm.
  • the radius is located in the lateral (on the thumb side) part of the forearm according to the anatomical posture. It articulates with the humerus at the elbow, whereas it articulates with the scaphoid bone and the lunatum bone at the wrist. It is the movable bone of the two bones in the forearm and helps the forearm rotate around its own axis. This bone is frequently broken as a result of falling on the hand, i.e. indirectly.
  • There are prostheses currently in use for fixing the said fracture however these prostheses cannot protect the cartilage tissue in case of facing with any load while repairing a bone fracture and they lead to new damages as a result of pressure. Therefore, there is need for a novel radial head prosthesis which does not lead to a new damage in the body during use thereof.
  • the International patent document no. W02006048520 discloses a radial head prosthesis.
  • the prosthesis consists of an anchoring rod, an insert and a radial head.
  • the radial head comprises an anatomical concave cavity on its upper part.
  • the anchoring rod and the insert are combined, whereas the insert and the radial head are combined with one another by means of the studs and hollow pieces.
  • the prosthesis has a modular structure consisting of three pieces.
  • the said invention can be used in patients suffering from osteoporosis and broken bones.
  • US6709459 another application in the state of the art, discloses a radial head prosthesis which is used in a patient’s elbow joint and can mimic anatomical movements.
  • the prosthesis comprises a head, a curved stem (body), a connecting member providing the connection between the head and the curved stem.
  • the head part is formed by a recess and the recess is concave in shape.
  • the curved stem is made of a material such as cobalt- chrome or titanium and its surface is roughened.
  • the surface of the connecting member can be coated with a material such as titanium, cobalt-chrome beads, or hydroxyapatite.
  • the head part and particularly the proximal surfaces of the recess are made of a highly polished cobalt chrome or a ceramic material.
  • the International patent document no. W02013026676 discloses a prosthesis.
  • the prosthesis basically consists of a joint head member and a stem part.
  • the joint head member comprises a first head component and a second head component.
  • a telescopic mechanism is located between the first head component and the second head component. The telescopic mechanism is used for adjusting the relative longitudinal positioning of the first head component according to the second head component. After determining the suitable height for the prosthesis, a desired height is maintained by means of a fixing screw.
  • An objective of the present invention is to realize a prosthesis for repairing radial head bone in an arm elbow joint with impaired originality due to fracture or osteoarthritis.
  • Another objective of the present invention is to realize a prosthesis for eliminating the possibility of an additional injury to occur by avoiding a pressure to be applied to the arm while healing a radial head fracture, by means of its telescopic motion capability.
  • Figure 1 is top, bottom and side perspective views of the body among the inventive prosthesis parts.
  • Figure 2 is top, bottom and side perspective views of the closing member among the inventive prosthesis parts.
  • Figure 3 is top, bottom and side perspective views of the connecting member among the inventive prosthesis parts.
  • Figure 4 is a sectional view wherein all modular pieces of the inventive prosthesis are mounted.
  • the inventive radial head prosthesis (1) for repairing radial head bone in an arm elbow joint with impaired originality due to fracture or osteoarthritis and having a modular structure comprises:
  • At least one body (5) which has at least one stem (2) that enables fixation to the bone marrow, at least one spring (3) that is located on the end part of the stem (2) and provided in the form of a hollow open-ended cylinder used for creating a telescopic motion, and at least one housing (4) that is located on the part where the stem (2) combines with the spring (3);
  • the body (5) included in the inventive radial head prosthesis (1) is a structure made of a single piece comprising the stem (2), the spring (3) and the housing (4).
  • the stem (2) included in the body (5) has a size and shape suitable to be inserted into the radial bone marrow in a thickness and shape specifically for the patient by considering the patient anatomy, and it is inserted into the radial bone marrow.
  • the stem (2) is made of a porous structure similar to a spongiform bone structure for enabling strong adherence and fusion to the bone upon being inserted into the bone marrow.
  • surface roughening and hydroxyapatite coating and similar methods are applied to the stem (2) in order to enhance adherence to the bone.
  • the spring (3) included in the body (5) is responsible for enabling the closing member (9) to move telescopically. In other words, it absorbs undesired impacts and slows down fast movements. Thus, any impact to occur on a repaired radial head bone or formation of a new damage in the arm is avoided. Stiffness, number of spirals, section thickness and similar design properties of the spring (3) are chosen according to the patient and stiffness properties of the cartilage belonging to the age group of the patient to whom it will be applied are considered in the said choice.
  • the housing (4) included in the body (5) creates the opening enabling to place one end of the connecting member (6).
  • the body (5) is made in one piece and of titanium metal alloy with flexible structure.
  • the connecting member (6) included in the inventive radial head prosthesis (1) is in the form of a partial cylinder with two closed ends.
  • Part of the cylinder wall is in the form of a truncated cone (Y) in the connecting member (6).
  • the part (Y) of the connecting member (6) with a truncated cone shape has a size suitable to be mounted upon being fit into the housing (4) included in the body (5).
  • the connecting member (6) is connected to the housing (4) by means of shrink-fit from one end thereof.
  • the cylinder-shaped part (X) of the connecting member (6) has a size suitable to be fit into the internal clearance of the small-diameter cylinder of the closing member (9). Thus, it is fit into the small-diameter cylinder
  • the connecting member (6) enables connection of the body (5) and the closing member (9) with one another.
  • the connecting member (6) is a piece responsible for the stable telescopic motion realized between the body (5) and the closing member (9).
  • the connecting member (6) is made of a metal that is similar to cobalt-chromium alloy, has a low coefficient of friction, is rigid and abrasion resistant.
  • the outer surface of the large-diameter cylinder member (7) has an anatomic cavity
  • the diameter of the large- diameter cylinder member (7) of the closing member (9) is larger than the diameter of the spring (3) for covering the spring (3) such that it will be enclosed entirely while inserting the closing member (9) into the body (5). Meanwhile, the small-dimension cylinder member (7) of the closing member (9) is fit into the connecting member (6) inserted into the housing (4) that is located in the center of the body (5).
  • the closing member (9) is made of a metal that is similar to cobalt- chromium alloy, has a low coefficient of friction and is abrasion resistant.
  • the inventive radial head prosthesis (1) consists of combining a body (5) having a modular structure, the closing member (9) and the connecting member (6).
  • the stem (2) located in the body (5) part of the prosthesis (1) is produced together with the spring (3) part integrally from a single-piece metal block by means of CNC processing and the number of pieces included in the prosthesis (1) is reduced. In this way, it is aimed to reduce the metal debris arising from moving parts in a radial head prosthesis (1) and to extend the wear life. Also, it is ensured that the minimum force required for the concentric motion of the spring (3) is just below the maximum elastic compression strength of the cartilage by adjusting the physical, design and alloy properties of the spring (3) in the body (5). Thus, it is ensured that when a radial head prosthesis (1) is under a compressive load in a patient’s body, the articular cartilage being in contact with it is prevented from being damaged.
  • the inventive radial head prosthesis (1) is produced by means of a patient-specific design. For this purpose, it is ensured that a body (5) and a closing member (9) of a radial head prosthesis (1) are modified such that they will meet the need of a patient optimally by processing a 3D anatomy of a patient -that is obtained by means of radiological imaging of both diseased and healthy arm- in a CAD program. Prostheses are produced specifically for the patient for whom the order was given by a doctor or a hospital, by using Industry 4.0 applications in the production process of the components composing a radial head prosthesis (1) and thereby, these are delivered to the hospital and the doctor who will use them shortly after the order.
  • a patient-specific radial head prosthesis (1) is produced by the staff at a production center by using computer-aided production techniques (3D printers, CNC, milling, lathe, etc.) and delivered to the related hospital and/or doctor so as to be used in surgery.
  • computer-aided production techniques 3D printers, CNC, milling, lathe, etc.

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

La présente invention concerne une prothèse (1) pour la réparation d'un os de tête radiale dans une articulation de coude du bras avec un état d'origine détérioré dû à une fracture ou à l'arthrose. Ladite prothèse (1) comprend au moins un corps (5) qui comporte au moins une tige (2) qui permet une fixation à la moelle osseuse, d'au moins un ressort (3) qui est situé sur la partie d'extrémité de la tige (2) et se présentant sous la forme d'un cylindre creux à extrémité ouverte utilisé pour créer un mouvement télescopique, et d'au moins un boîtier (4) qui est situé sur la partie où la tige (2) se combine avec le ressort (3); au moins un élément de liaison (6) qui est inséré dans le boîtier (4) qui est situé sur le corps (5) à partir d'une extrémité de celui-ci; et au moins un élément de fermeture (9), l'extrémité de l'élément de liaison (6) qui n'est pas relié au boîtier (4) pénétrant dans la petite dimension par comparaison à l'autre, qui comporte deux éléments cylindriques creux (7) qui ont deux diamètres différents avec les mêmes centres intégrés et une extrémité ouverte, au moins une cavité (8) étant incluse sur la surface externe de celui avec un grand diamètre parmi les éléments cylindriques (7) qui sont situés sur l'extrémité fermée, et entourant le ressort (3) lorsque l'élément de liaison (6) s'ajuste dans l'élément de cylindre de petit diamètre (7).
PCT/TR2021/050709 2020-07-09 2021-07-09 Prothèse de tête radiale WO2022010446A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2020/10918A TR202010918A2 (tr) 2020-07-09 2020-07-09 Bi̇r radi̇us başi protezi̇
TR2020/10918 2020-07-09

Publications (1)

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WO2022010446A1 true WO2022010446A1 (fr) 2022-01-13

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TR (1) TR202010918A2 (fr)
WO (1) WO2022010446A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050216090A1 (en) * 2004-03-11 2005-09-29 O'driscoll Shawn W Systems for bone replacement
WO2008098250A2 (fr) * 2007-02-10 2008-08-14 Small Bone Innovations, Inc. Implant de tête de radius et instrument apparenté
US20100087879A1 (en) * 2002-10-24 2010-04-08 Biomet Manufacturing Corp. Method and Apparatus for Wrist Arthroplasty
US20140012388A1 (en) * 2012-07-06 2014-01-09 Mayo Foundation For Medical Education And Research Radial head prostheses and trials
US20140074246A1 (en) * 2012-09-10 2014-03-13 Acumed Llc Radial head prosthesis with floating articular member

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100087879A1 (en) * 2002-10-24 2010-04-08 Biomet Manufacturing Corp. Method and Apparatus for Wrist Arthroplasty
US20050216090A1 (en) * 2004-03-11 2005-09-29 O'driscoll Shawn W Systems for bone replacement
WO2008098250A2 (fr) * 2007-02-10 2008-08-14 Small Bone Innovations, Inc. Implant de tête de radius et instrument apparenté
US20140012388A1 (en) * 2012-07-06 2014-01-09 Mayo Foundation For Medical Education And Research Radial head prostheses and trials
US20140074246A1 (en) * 2012-09-10 2014-03-13 Acumed Llc Radial head prosthesis with floating articular member

Also Published As

Publication number Publication date
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