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WO2018143841A2 - Elément d'augmentation de tissu osseux utilisée pour remplacer un os spongieux et une surface articulaire - Google Patents

Elément d'augmentation de tissu osseux utilisée pour remplacer un os spongieux et une surface articulaire Download PDF

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Publication number
WO2018143841A2
WO2018143841A2 PCT/RU2018/000040 RU2018000040W WO2018143841A2 WO 2018143841 A2 WO2018143841 A2 WO 2018143841A2 RU 2018000040 W RU2018000040 W RU 2018000040W WO 2018143841 A2 WO2018143841 A2 WO 2018143841A2
Authority
WO
WIPO (PCT)
Prior art keywords
bone
polished
augment
flat surfaces
articular surface
Prior art date
Application number
PCT/RU2018/000040
Other languages
English (en)
Russian (ru)
Other versions
WO2018143841A3 (fr
Inventor
Александр Александрович ВЕТОШКИН
Дмитрий Николаевич БОГОСЛОВСКИЙ
Original Assignee
ПОПОВ, Дмитрий Александрович
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 ПОПОВ, Дмитрий Александрович filed Critical ПОПОВ, Дмитрий Александрович
Publication of WO2018143841A2 publication Critical patent/WO2018143841A2/fr
Publication of WO2018143841A3 publication Critical patent/WO2018143841A3/fr

Links

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
    • A61F2/28—Bones

Definitions

  • the utility model relates to the field of medicine, namely to orthopedics and can be used to replace bone defects of the cancellous bone.
  • a known implant for replacing a bone defect, containing a layer of grains of porous titanium nickelide further comprises a monolithic part of porous titanium nickelide mounted on the above layer of grains of porous titanium nickelide, forming a spongy part of the implant, while both parts of the implant are pre-saturated with an antibiotic diluted with rich platelet autoplasma (RF patent Ns105584, published 06/20/2011).
  • the closest analogue of the patented product is an element of the tibia of the hip joint made of forged titanium alloy, having a shaft that is designed for cementless insertion into the femur of a human or animal, and which has a porous metal surface obtained by firing and / or in the proximal region fusion, as well as a region with a polished surface (WO2015144129, published 01.10.2015).
  • the technical problem solved by the proposed utility model is to create a new tool for replacing a defect in the spongy bone and part of the articular surface, which is characterized by high survival rate and low trauma for the tissues surrounding the augmented defect.
  • the proposed tool is intended to fill a defect in bone tissue and articular surface with augment made by the additive technology of titanium alloy Ti 6AI 4V.
  • the technical result of the patented solution is to increase the survival rate of the augmentation element of bone tissue with the articular surface by eliminating rejection and additional injury to others tissues, provided by the adhesion of the porous surfaces of the augment element with the walls of the bone defect without the use of cement, negatively acting on the surrounding tissue.
  • the specified technical result is achieved due to the construction of bone augment for replacing the defect in the tubular bone, made using additive technology of titanium alloy Ti 6AI 4V and including curved and flat surfaces, where the flat surfaces are made porous and the curved is polished, and includes two through holes for mounting screws made in such a way that the screw caps are flush with the polished surface.
  • the proposed element is made of a titanium alloy in accordance with GOST R ISO 5832-3-2014 (Implants for surgery. Metallic materials. Part 3. Deformable alloy based on titanium, 6-aluminum and 4-vanadium).
  • the element is made according to individual anthropometric data using the ZR-print method using MSCT and MRI data, while the size of the finished product corresponds to the dimensions of the model obtained in the STL format.
  • the set of essential features of the product is aimed at reducing the invasiveness of tissues surrounding the bone, which increases the likelihood of engraftment of a fragment of a titanium alloy to the bone.
  • Flat surfaces of the structure are made porous, which allows not using cement to adhere the augment to the walls of the bone defect and ensures the gradual ingrowth of living tissue into the augment material.
  • the curved augment surface forming the articular surface is polished, which ensures good sliding of the friction pair in the joint.
  • the screw holes with recesses for the screw caps are made so that the surfaces of the caps are flush with the polished augment surface, which prevents contact of the screw caps in a friction pair.
  • the direction of the holes is designed in such a way as to ensure easy installation of screws in a minimally invasive surgical manner using arthroscopy.
  • the direction of insertion of the screws is perpendicular to the curved articular surface of the augment and is directed to the projection of the center of the bone metaphysis.
  • FIG. 1 - a general view of augmentation of bone tissue.
  • FIG. 2 the position of the screws in the augment.
  • the prosthesis element for replacing bone defects in the tubular bone is made by selective laser melting (SLM) and includes flat surfaces 1 made of porous. Porosity is obtained due to 3D printing by means of layer-by-layer growth of the cellular structure, the unit cell of which is the dodecahedron.
  • the holes 3 are made through and aligned with the screws 5, and also include recesses 4 under the caps of the screws 5 so that the caps of the screws are flush with the polished surface 2 of the part.
  • the overall overall dimensions of the part are individual for each application.
  • Titanium augment is made by the method of ZR-printing of titanium alloy.
  • the printing process begins with the separation of the digital three-dimensional model into layers with a thickness of 20 to 100 microns.
  • the production cycle consists of applying a thin layer of powder on the work surface - usually a metal table that can move in the vertical direction.
  • the printing process takes place in a working chamber filled with inert gases.
  • the lack of oxygen avoids the oxidation of the consumable, which makes printing possible with materials such as titanium.
  • Each layer of the model is fused, repeating the contours of layers of a digital model. Melting is carried out using a laser beam guided along the X and Y axes by two mirrors with a high deflection rate.
  • the power of the laser emitter is high enough to melt the powder particles into a homogeneous material.

Landscapes

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

Abstract

Le modèle d'utilité concerne le domaine de la médecine et peut s'utiliser pour remplacer des défauts osseux d'un os spongieux. Le résultat technique de l'invention consiste à augmenter la capacité d'adaptation de l'élément de prothèse grâce à l'élimination du risque de rejet et de traumatisme supplémentaire des tissus environnants. L'élément d'augmentation du tissu osseux est fait d'un alliage de titatne et comprend des surfaces incurvée et planes, les surfaces planes étant poreuse et la surface incurvée étant polie, ainsi que deux trous débouchants pour les vis de fixation réalisées de telle sorte que les têtes de vis soient à fleur avec la surface polie.
PCT/RU2018/000040 2017-02-01 2018-01-29 Elément d'augmentation de tissu osseux utilisée pour remplacer un os spongieux et une surface articulaire WO2018143841A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2017103214 2017-02-01
RU2017103214 2017-02-01

Publications (2)

Publication Number Publication Date
WO2018143841A2 true WO2018143841A2 (fr) 2018-08-09
WO2018143841A3 WO2018143841A3 (fr) 2018-09-07

Family

ID=63040809

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2018/000040 WO2018143841A2 (fr) 2017-02-01 2018-01-29 Elément d'augmentation de tissu osseux utilisée pour remplacer un os spongieux et une surface articulaire

Country Status (1)

Country Link
WO (1) WO2018143841A2 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2220682C2 (ru) * 2002-01-10 2004-01-10 Ланшаков Виталий Алексеевич Имплантат для пластики костных дефектов опорных поверхностей суставов
AU2003261497B2 (en) * 2002-11-08 2009-02-26 Howmedica Osteonics Corp. Laser-produced porous surface
GB0717692D0 (en) * 2007-09-11 2007-10-17 Roberts Paul Acetabular component

Also Published As

Publication number Publication date
WO2018143841A3 (fr) 2018-09-07

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