• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention discloses a system of a dental implant (1-1) and a fastener (1-2), which dental implant has an elongate shaped internal body substantially resembling a root of the tooth, which fastening element comprises a particularly advantageous heterogeneous porous structure (3-3) ensuring bone growth and osteo integration (4-3), said fastening element comprises a self-locking device (4-1) which clings to the wall bone of the implant medium. The invention advantageously provides a dual response to the problems inherent in dental implantology namely osseointegration and mobility of the implant during its installation. The entire dental implant and its fixing element is made by stacking layers of metallic or non-metallic powders, selectively fused by concentration of a source of energy.
    公开号:FR3036945A1
    申请号:FR1501133
    申请日:2015-06-02
    公开日:2016-12-09
    发明作者:Abdelmadjid Djemai；Jean Jacques Fouchet
    申请人:Abdelmadjid Djemai；Jean Jacques Fouchet；
    IPC主号:
    专利说明:

    [0001] 1 Set consisting of a dental implant and a self-locking fastening element with heterogeneous porous structures and its method of manufacture. Description A set of a dental implant and a fixation member, which dental implant has an elongate shaped internal body substantially resembling a root of the tooth, which fixation member comprises a heterogeneous porous structure for bone growth, said fastening element comprises a self-locking device The implant is the generally metallic infrastructure intended to support a dental prosthesis. It allows to replace the natural pillars that are the teeth, by mechanical pillars, placed either in the mandibular bone, or in the maxillary bone.
    [0002] The most important thing in setting up a dental implant is getting an immediate block in the bone. Even a low mobility of the implant in the bone ultimately leads to rejection, a small disparity between the implant and the bone can lead to bone resorption. Current dental implant manufacturing techniques are traditional machining techniques, usually a threaded rod. The implant thus produced has a smooth and shiny surface. Once the implant is introduced into the bone, a threaded ring or screw is placed on the outer part which is usually a threaded rod. On said threaded ring or screw, is fixed by cement the dental prosthesis. The main causes of rejection of dental implants are implant mobility (even low) and bone resorption due in general to the surface condition of the implant. The state of the art can be defined by two categories of patents: Implants patents made by machining, let us quote the patent of Jean-Marc JUILLET deposited on June 12, 1972 under No. 72 21113 and published on January 2, 1974 under No. 2.188.445 Implant patents made by additive manufacturing (3D printing), we quote the patent of the University of Liverpool filed on June 9, 2010 under the number W02010146383A1. This patent describes a dental implant made by additive manufacturing, where a method of manufacturing by selective laser melting is explained at length, but it provides no solution to the problems of locking the implant to the mouth. Other patents dealing with surface treatments for osteo integration include the Zimmer Dental patent "Dental implant with improved osseointegration features" filed August 30, 2006 under the number US807512 B2.
    [0003] The patent of Conformis Inc. "Devices and Methods for Additive Manufacturing of Implants Components" filed April 13, 2013 under the number WO 2013155500 Al The patent of Eric Jones "Laser produced porous surfaces" filed December 6, 2005 under the number US20070142914. patent of Howmedica Osteonics Corp. "Laser produced implants" filed December 29, 2006 40 under the number US20080004709 All these patents describe means and methods of surface treatment or a way of depositing endospores of Tantalum by the method of chemical deposition under vapor form, the porosity obtained is on average 35% and the inter connectivity is partial 3036945 2 5 Several publications deal with the subject of the additive manufacturing of dental implants, the most relevant publications are: Direct Metal Laser Sintering Titanium Dental Implants: A Review of the Current Literature »published on 01 December 2014 in International Journal of Biomaterials. morphometric Evaluation of Direct Laser Metal Forming (DLMF) Implant Surface in the Type IV IV Bone: A Controlled Study in Human Jaw "Published July 25, 2013 in the journal POSEIDON Journal" Manufacturing of Bioactive Porous Ti Metal with Structure Similar to human Cancellous Bone by Selective Laser Melting "Published December 2, 2010 in the journal BDA Bioceramics Development and Applications. All the publications agree on the undeniable advantages of the realization of dental implants 15 by additive manufacturing in compatible organic materials of the Ti6AI4V type in different grades. Additive manufacturing and for certain additive technologies specifically (SLM, EBM, SLA) offer several possibilities for controlling geometry, porosity, inter connectivity and 3D architecture through changes in the manufacturing parameters, The main parameters for selective laser melting technology are: - laser power - scan speed - spot diameter - laser scan strategy 25 - overlap between two melting points - layer thickness of the laser Powder The Selective Laser Melting (SLM) selective metal powder laser melting process, the SLM name will be maintained throughout the text of the patent. SLM is a process used to manufacture complex three-dimensional components from metal powders, ceramic or polymer powders. The technology is mature and already used in the aerospace and medical industries to manufacture complex components with high densities and homogeneity. We cite one of the first patents of the Fraunhofer Institute in Germany, filed Oct. 27, 1997 under the number W01998024574A1, which describes the SLM process in a more precise way. The present invention describes a system and its method by additive manufacturing of dental implants with heterogeneous and self-locking porous structures which advantageously provides a double answer to the problems inherent to dental implantology, namely the osteointegration and the mobility of the dental implant. implant during its installation. For this, the present invention provides a self-locking dental implant with heterogeneous porous structures.
    [0004] Said structure has a porosity of between 30% and 80%, a pore size of between 100 μm and 500 μm and a pore distribution of between 500 and 700 μm with total interconnectivity. In a preferred embodiment the porosity between 60% and 70%, the pore size between 200pm and 300pm with a distribution of porosity of between 100 and 600 μm and a total inter connectivity Its parameters are close to the characteristics of the bone in the maxilla and mandible. The dental implant described in the present invention is composed of a central body which represents the root rooted in the jaw bone, the head of the implant may be rounded, flat, hollow, or any particular shape to receive the prosthetic pillar, in another embodiment the implant may be integral with the implant abutment. The one-piece production of the implant and the prosthetic abutment will be done by additive manufacturing, special angles of curvature between the implant and the abutment are calculated following a digital processing of three-dimensional images of the morphology of the jaw.
    [0005] A coating with heterogeneous porous structures of helical shape for certain threaded implants but this coating can be of different shapes and geometries that come in dressing of part or all of the dental implant. Preferably in the portion of the dental implant in contact with the bone. The dental implant and its fixing element are made by stacking layers of metallic or nonmetallic powder, selectively fused, in the case of titanium / aluminum / vanadium alloy metal powder the thickness of the layers is generally 30 μm. . One of the additive manufacturing techniques selected for our example is SLM technology, this embodiment is not limiting, other deposition technologies can be deployed. The digital file of the dental implant is produced by a three-dimensional design software either according to standard models and standards or according to a particular embodiment: in this case, the shape of the dental implant, namely its height. its low section and its high section are determined more precisely. In another embodiment, the dental implant may have the exact shape of the tooth, this mode is preferred in the case of replacement of a tooth just after extraction. The fixing element is predefined with a particular thickness of between 1 and 2 mm from the central body of the implant, in a preferred embodiment the thickness is between 0.8 mm and 1.5 mm. The fastening element is formed by a porous structure. Several forms of porosity can be selected with the possibility of defining the pore distribution zones of different sizes. The porous structure forming the fixing element has a porosity of between 30% and 80%, a pore size of between 100 μm and 500 μm and a pore distribution of between 500 and 700 μm with total interconnectivity. In a preferred embodiment the porous structure has a porosity of between 60% and 70%, the pore size between 200 μm and 300 μm with a distribution of porosity of between 100 and 600 μm and a total inter connectivity. The basic cell or unit cell is of three-dimensional geometric form (x, y, z), the unit cell is formed by at least three edges with an angle opening of at least 10 °, and the unit cell may be regular or irregular shaped pyramid, tetrahedron, cubic, octahedron, icosahedron, dodecahedron and without limitation of shape. In a preferred embodiment, the unit cell will be of reinforced dodecahedron form. In another embodiment, the unit cell is formed of 12 edges with edge opening angles of 30 ° with respect to the vertical axis or the construction axis. The ridges may be regular or irregular depending on the density of the mesh and the desired porosity. The material used for producing such an implant is a biocompatible material of pure metal or metal alloys of the cobalt, tantalum, niobium chromium type, metallo-ceramic or organo-metal or organo-ceramic compounds or a metal organo-ceramic combination. For the realization of the central implant, two alloys of materials were used in a Grade 23 titanium aluminum vanadium Ti6Al4V alloy with an oxygen content <0.2%. A combination of a titanium alloy advantageously mixed with a material based on zirconia. Three alloys were used for the realization of the fastener element. 45 - An alloy Titanium Aluminum vanadium Ti6Al4V grade 23, with an oxygen content <0.2 3036945 4 5 - A combination of a titanium alloy advantageously mixed with A zirconia-based material - A combination of a titanium alloy advantageously mixed with a nickel-based alloy And in a preferred embodiment a biocompatible material containing a zirconia-titanium composite / binary material with zirconia powder concentrations between 5% and 25%. . The present invention aims at exploiting a system of self-locking dental implants with heterogeneous porous structures and its production method by additive manufacturing, and in a preferential mode by SLM technology. The dental implant system with heterogeneous porous structures is made by selective fusion of biocompatible metal powder with a particular embodiment of the implant surface. The self-locking system of the implant is made by a mechanical means that pushes the helical portion to the bone seat of the implant. The helical portion may be integral (a) or non-integral (b) of the central core of the dental implant, (a) Solid: the helical portion is held by at least four integral attachment points of the central pillar 20, at the laying of the dental implant, a suitable tool comes to hunt the attachment points in order to release the helicoidal part that sticks to the walls of the hollow of the implant (b) Not secured: the assembly of the helical part on the central pillar is made by lateral compression by a suitable tool and the installation of the dental implant, the whole is released. Other means of attachment may be envisaged, for example thermal expansion fixation or chemical fixation in reaction with an additive or in contact with the implant medium. Another method of attachment can be envisaged, with a stoichiometric mixture of nickel / titanium forming Nitinol, a shape memory alloy and having a greater elasticity to titanium. The invention will now be described in more detail with the aid of the drawings which illustrate preferred embodiments of an assembly according to the invention. In the drawings: FIG. 1 shows the dental implant assembly and the FIG.
    [0006] 2 Illustrates the digital flow of the embodiment of the dental implant assembly and FIG. 3 illustrates the embodiment of the unit cell and its implementation in the FIG.
    [0007] 4 Illustrates the setting of the dental implant and fixation element in the mouth and its self-locking on the implant wall. The dental implant described in the present invention is composed of a central body which represents the core of the implant (1-1), the head of the central body may be rounded, flat, hollow, or any particular shape to receive a In another embodiment, the implant core may be integral with the implant abutment and made in one piece in additive manufacturing with particular angles of curvature depending on the morphology. A coating with heterogeneous porous structures (1-2) of helical shape for some implants but this coating can be of different shapes and geometries that come in dressing of part or all of the dental implant.
    [0008] The implant is made by additive manufacturing according to the SLM technology already described, the implant (2-1) is made by a three-dimensional design software according to the morphology of the patient, the height and the section of the patient. implant are thus defined. The porous portion (2-3) is predefined with a particular thickness of between 1 and 2 mm of the central body of the implant (2-2). Several forms of porosity can be selected (2-4; 2-5; 2-6) with the possibility of setting the pore distribution zones of different sizes.
    [0009] The basic cell or unit cell (3) is of geometric shape in three dimensions (x, y, z), the unit cell is formed by at least three edges (3-1), with a rounded-shaped cladding (3). -2), this form is not limiting, with an angle opening of at least 10 °, and the unit cell may be of regular or irregular shape in the form of a pyramid, tetrahedron, cubic, octahedron, icosahedron, dodecahedron and without limitation of form.
    [0010] The distribution of the unit cells (3-3) may be regular or irregular, with opening angles of at least 10 °. After dressing the unit cells (3-4) the porous part is formed. An implant diameter drill tapped the bone, because of the low density and natural porosity of the maxillary and mandibular bone, the threading is approximate. At the mouth of the dental implant (4- 2), small cavities appear between the body of the implant and bone see detail (4-1). Upon release of the fastener (4-4) all small cavities are filled, see detail (4-3). The numerical execution flow of the tasks is summarized in FIG. 2. Step 1: The digital file of the dental implant is made by a three-dimensional design software (2-1), the form can be standardized according to a pre-defined or customizable template.
    [0011] Step 2: delineation of the part of the fixation element (2-3) and the solid part representing the body of the implant (2-2), Step 3: generation of a type of unit cells or a combination said basic cells (2-4; 2-5; 2-6). Which cells are characterized by the geometry thus produced has the advantage of controlling the porosity and its density. Step 4: Realization of the central implant assembly + fixation element (2-7) having a porous surface advantageously heterogeneous.
    [0012] EXAMPLE OF IMPLEMENTATION CRITERIA OF THE IMPLANT TOOL SET AND HOLDING MEMBER ON AN SLM 125 HL MACHINE OF THE MANUFACTURER SLM SOLUTIONS GMBH Preferably, it is recalled that: The assembly according to the invention is produced by stacking layers of metallic or non-metallic powders, selectively fused by concentration of a source of energy. The assembly according to the invention is characterized in that said fixing element comprises a heterogeneous structure having a porosity of between 60% and 80%. - The assembly according to the invention is characterized in that said fixing element is formed by a multiple of a unit cell, said unit cell is formed by at least three edges and opening angles of at least 10 °. The assembly according to the invention is characterized in that said dental implant has either a cylindro-conical geometry or the morphological form of the tooth.
    [0013] 3036945 6 Parameter Type Dental Implant Fixing Element Powder Type Titanium (Ti6AI4V) Titanium (Ti6AI4V) Laser Power in Solid Zone (w) 400 300 Laser Low Power (w) 200 100 Laser Power in Porous Zone (w) 100 Exposure (ms) 350 380 Exposure limit (ms) 300 350 Hatch distance (μm) 25 10 Type of parameter Dental implant Fixing element Powder type Titanium / zirconia Titanium / nickel Laser power in full area (w) 400 200 Low laser power (w) 200 80 Porous laser power (w) 80 Exposure (ms) 350 380 Exposure limit (ms) 300 350 Hatch distance (pm) 25 10 Parameter type Dental implant Element Powder type Titanium / zirconia Titanium / zirconia Laser power in full area (w) 400 400 Laser low power (w) 200 125 Laser power in porous area (w) 125 Exposure (ms) 380 400 Limit of exposure exposure (ms) 280 320 Hatch distance (pm) 30 25 5 10 15
    权利要求:
    Claims (9)
    [0001]
    1. A set comprising a dental implant and a fastener, characterized in that the dental implant has an elongate inner body arranged in an elongate shape substantially resembling a root of the tooth, and in that the fixing element comprises a heterogeneous porous structure providing bone growth, said fixation member comprises a self-locking device.
    [0002]
    2. The assembly of claim 1, characterized in that said fastener comprises a heterogeneous structure having a porosity of between 60% and 80%. 15
    [0003]
    3- assembly according to claim 1 or 2, characterized in that said fastener comprises a structure having a thickness between 0.8mm and 1.5mm.
    [0004]
    4. The assembly of claim 1 or 2, characterized in that said fastener 20 comprises a structure having pore sizes between 200pm and 300pm.
    [0005]
    5. The assembly of claim 1 or 2, characterized in that said fastener comprises a structure having a distribution of porosity between 100pm and 600pm. 25
    [0006]
    6. The assembly of claim 1 or 2, characterized in that said fixing element is formed by a multiple of a unit cell, said unit cell is formed by at least three edges and opening angles of at least 10 °.
    [0007]
    7. The assembly according to one of claims 1 to 6, characterized in that said dental implant 30 has either a cylindro-conical geometry or the morphological shape of the tooth.
    [0008]
    8- assembly according to one of claims 1 to 7, characterized in that said implant is made of either metal or ceramic, or a composite material or binary titanium zirconia material or a combination of these materials, and in that said fastener is made of either metal, composite material, titanium zirconia bit material, nickel / titanium shape memory material or a combination of these materials.
    [0009]
    9- A method of manufacturing the assembly according to one of the preceding claims, characterized in that it is carried out by stacking layers of metal or non-metallic powders, 40 fused selectively by concentration of a power source. 45
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    同族专利:
    公开号 | 公开日
    FR3036945B1|2021-12-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20090011384A1|2005-08-30|2009-01-08|Michael Collins|Dental implant for a jaw with reduced bone volume and improved osseointegration features|
    US20070142914A1|2005-12-06|2007-06-21|Eric Jones|Laser-produced porous surface|
    US20100114314A1|2008-11-06|2010-05-06|Matthew Lomicka|Expandable bone implant|
    EP2272461A2|2009-07-10|2011-01-12|Zimmer Dental Inc.|Patient-specific implants with improved osseointegration|
    US20120225408A1|2009-11-02|2012-09-06|Simon Garry Moore|Flexible spring fastener|US10575886B2|2018-05-09|2020-03-03|Warsaw Orthopedic, Inc.|Bone screw and method of manufacture|
    US10993753B2|2018-05-09|2021-05-04|Warsaw Orthopedic, Inc.|Bone screw and method of manufacture|
    US11191582B2|2018-05-09|2021-12-07|Warsaw Orthopedic, Inc.|Bone screw and method of manufacture|
    US11224470B2|2018-05-09|2022-01-18|Warsaw Orthopedic, Inc.|Bone screw and method of manufacture|
    法律状态:
    2016-06-27| PLFP| Fee payment|Year of fee payment: 2 |
    2016-12-09| PLSC| Publication of the preliminary search report|Effective date: 20161209 |
    2017-06-28| PLFP| Fee payment|Year of fee payment: 3 |
    2018-06-28| PLFP| Fee payment|Year of fee payment: 4 |
    2020-06-15| PLFP| Fee payment|Year of fee payment: 6 |
    2021-06-29| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1501133A|FR3036945B1|2015-06-02|2015-06-02|SET CONSISTS OF A DENTAL IMPLANT AND A SELF-LOCKING FIXING ELEMENT WITH HETEROGENOUS POROUS STRUCTURES AND ITS MANUFACTURING PROCESS|FR1501133A| FR3036945B1|2015-06-02|2015-06-02|SET CONSISTS OF A DENTAL IMPLANT AND A SELF-LOCKING FIXING ELEMENT WITH HETEROGENOUS POROUS STRUCTURES AND ITS MANUFACTURING PROCESS|
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