WO2017189344A1 - Multi-layered zirconia dental mill blank and process of production - Google Patents

Multi-layered zirconia dental mill blank and process of production Download PDF

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Publication number
WO2017189344A1
WO2017189344A1 PCT/US2017/028717 US2017028717W WO2017189344A1 WO 2017189344 A1 WO2017189344 A1 WO 2017189344A1 US 2017028717 W US2017028717 W US 2017028717W WO 2017189344 A1 WO2017189344 A1 WO 2017189344A1
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WO
WIPO (PCT)
Prior art keywords
comp
mill blank
components
composition
dental
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.)
Ceased
Application number
PCT/US2017/028717
Other languages
English (en)
French (fr)
Inventor
Rainer K. Dittmann
Hans R. Schnagl
Grit Kindler
Björn THEELKE
Michael Sogl
Michaela Urban
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.)
3M Innovative Properties Co
Original Assignee
3M Innovative Properties Co
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Publication date
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Application filed by 3M Innovative Properties Co filed Critical 3M Innovative Properties Co
Priority to CN201780025547.9A priority Critical patent/CN109069239B/zh
Priority to BR112018071894A priority patent/BR112018071894A2/pt
Priority to JP2019506606A priority patent/JP6968152B2/ja
Priority to US16/095,433 priority patent/US10898302B2/en
Publication of WO2017189344A1 publication Critical patent/WO2017189344A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/0003—Making bridge-work, inlays, implants or the like
    • A61C13/0022—Blanks or green, unfinished dental restoration parts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/08—Artificial teeth; Making same
    • A61C13/083—Porcelain or ceramic teeth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B18/00—Layered products essentially comprising ceramics, e.g. refractory products
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
    • C04B35/486—Fine ceramics
    • C04B35/488—Composites
    • C—CHEMISTRY; METALLURGY
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    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/0051—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof characterised by the pore size, pore shape or kind of porosity
    • C04B38/0054—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof characterised by the pore size, pore shape or kind of porosity the pores being microsized or nanosized
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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    • C04B38/0058—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof characterised by the pore size, pore shape or kind of porosity open porosity
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    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/0067—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof characterised by the density of the end product
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    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
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    • C04B38/0074—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof characterised by the pore distribution, e.g. inhomogeneous distribution of pores expressed as porosity percentage
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/08—Artificial teeth; Making same
    • A61C13/082—Cosmetic aspects, e.g. inlays; Determination of the colour
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    • C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
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    • C04B2235/3225—Yttrium oxide or oxide-forming salts thereof
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Definitions

  • Dental mill blanks are typically used for producing dental restorations (e.g. crowns and bridges) by a milling process.
  • the zirconia material, the dental mill blank is made of, is typically in a pre-sintered and porous stage which facilitates its milling.
  • the obtained dental article is then sintered to its final density before it is placed in the mouth of the patient.
  • Pure zirconia is white and does not match to the natural colour of the tooth in the mouth of a patient.
  • the milled zirconia dental ceramic is often treated with colouring solutions before sintering.
  • EP 2 024 300 Bl (Karlsruhe Institut fiir Technologie) describes a method for producing ceramic, wherein a green body, which consists of at least two different poiser mixtures that are compacted to form a moulded body, said powder mixture respectively containing a ceramic powder and a colouring metal compound and/or colouring pigment, wherein each set of two powder mixtures differs in its composition of colouring metal compound and/or colour pigment, is initially produced and subsequently sintered, wherein the ceramics are shaped prior to sintering and/or as an intermediate step, during which sintering is interrupted and then continued after shaping and wherein the at least two powder mixtures have the same volume changes during sintering.
  • US 2008/064011 Al decribes a multi-colored shaped body having layers arranged on top of one another comprising at least two successive and differently colored main layers and at least two differently colored intermediate layers between the at least two successive and differently colored main layers, wherein a change in color between the intermediate layers takes place in a direction which is contrary to the direction of the change in color between the main layers.
  • WO 2013/156483 Al describes a process for producing a non-dense sintered ceramic molded body having at least two layers, wherein a first powdery ceramic material forming a layer is contacted with at least a second powdery material forming at least a second layer; said first powdery material has a pre-sintering temperature Tl that is higher than the presintering temperature Ts of said at least second powdery ceramic material; the course of a curve of shrinkage SI of said at least first powdery ceramic material differs from the course of a curve of shrinkage S2 of said at least second powdery material.
  • US 8,936,848 B2 (Jung et al.) relates to a non-pre-coloured dental block device for producing a dental prosthesis, the dental block device comprising: a) a green body comprising zirconia; b) the green body having multiple different layers each having a different chemical composition between adjacent layers; c) the different chemical composition including different amounts of yttria between the adjacent layers; d) the green body being substantially opaque with a substantially consistent optical characteristic of non-translucency with respect to visible light across the layers; e) the green body having a brightness/lightness L* value between 10 to 20 for a sample thickness of 1 to 1.3 mm in accordance with CIE L*a*b* colorimetric system; and f) the green body being subsequently millable and sinterable to form the dental prosthesis with the multiple different layers having different optical characteristics of translucency.
  • none of the suggested solutions is completely satisfying.
  • One objective of the invention described in the present text can be seen in providing a dental mill blank which can be used for producing high aesthetic dental restorations, wherein the dental mill blank should be easy to manufacture.
  • the invention relates to a process for producing a dental article, the process comprising the steps of
  • Fig. 3 shows the development of the value b* in relation to the z-direction (height) of the dental mill blank as described in the present text in comparison to a dental mill blank without intermediate layers.
  • a dental article should not contain components which are detrimental to the patient ' s health and thus free of hazardous and toxic components being able to migrate out of the dental article.
  • Calcining refers to a process of heating a solid material to drive off at least 90 percent by weight of volatile chemically bond components (e.g., organic components) (vs., for example, drying, in which physically bonded water is driven off by heating). Calcining is done at a temperature below a temperature needed to conduct a pre- sintering step.
  • volatile chemically bond components e.g., organic components
  • fluorescing agent shall mean an agent showing fluorescence in the region of visible light (380 to 780 nm).
  • a dental mill blank can thus have the following structure:
  • the disc can be a circular, square, round, elliptical or may have circular, square, round, elliptical or circular elements.
  • y-dimension from 50 to 70 mm, or from 55 to 65 mm
  • the top layer E has the composition COMP-E and comprises ceramic components CER-COMP-E, colouring components COL-COMP-E stabilizing components STAB- COMP-E.
  • the at least one intermediate layer E x has the composition COMP-E of top layer E.
  • the mill blank does not comprise layers having a composition other than COMP-B or COMP-E. According to one embodiment, at least one of the compositions COMP-B or COMP-E.
  • the colouring components COL-COMP-B and COL-COMP-E are typically selected from oxides of Fe, Mn, Cr, Ni, Er, Pr, Nd, Tb, in particular from the oxides of Mn, Er, Pr, Tb and mixtures thereof (e.g. Fe 2 0 3 , Mn0 2 , Cr 2 0 3 , NiO, Er 2 0 3 , Pr 2 0 3 , Nd 2 0 3 , Tb 4 0 7 ).
  • the colouring components are typically present in an amount from 0.01 to 1 wt.% or from 0.02 to 0.8 wt.% or from 0.03 to 0.5 wt.% with respect to the weight of the dental mill blank.
  • - fluorescing agent from 0 to 1 wt.% or from 0.005 to 0.8 wt.%
  • the mill blank described in the present text does typically not comprise one or more of the following elements/components:
  • x being an integer and indicating the number of intermediate layers
  • the ceramic components of CER-COMP-E and CER-COMP-B being selected from oxides or Zr, Hf, Al and mixtures thereof,
  • a further layer of composition COMP-B is applied. This layer corresponds to intermediate layer B l . If desired, the above two steps can be repeated to provide further intermediate layers E x and B x in alternating order.
  • Either the top or bottom surface of the dental mill blank typically contains a marking element (e.g. printing or carving) which facilitates the correct orientation of the dental mill blank in the milling machine.
  • a marking element e.g. printing or carving
  • kit of parts may further comprise one or more of the following items: sintering aids, shade guide, polishing aids, colouring liquids or combination thereof.
  • Mill Blank (MB 2P/2L): "2 powders / 2 layers"

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Health & Medical Sciences (AREA)
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JP2019506606A JP6968152B2 (ja) 2016-04-25 2017-04-21 多層ジルコニア歯科用ミルブランク及び製造方法
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CN109069239A (zh) 2018-12-21
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EP3108849A1 (en) 2016-12-28
CN109069239B (zh) 2021-07-13
EP3108849B1 (en) 2019-04-24
US10898302B2 (en) 2021-01-26
EP3108849B2 (en) 2025-03-12
JP2019515030A (ja) 2019-06-06

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