WO2010000438A2 - Polyalkenoat-zemente mit verbesserten eigenschaften - Google Patents
Polyalkenoat-zemente mit verbesserten eigenschaften Download PDFInfo
- Publication number
- WO2010000438A2 WO2010000438A2 PCT/EP2009/004699 EP2009004699W WO2010000438A2 WO 2010000438 A2 WO2010000438 A2 WO 2010000438A2 EP 2009004699 W EP2009004699 W EP 2009004699W WO 2010000438 A2 WO2010000438 A2 WO 2010000438A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- acid
- cement according
- polyalkenoate
- component
- components
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L24/00—Surgical adhesives or cements; Adhesives for colostomy devices
- A61L24/04—Surgical adhesives or cements; Adhesives for colostomy devices containing macromolecular materials
- A61L24/06—Surgical adhesives or cements; Adhesives for colostomy devices containing macromolecular materials obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/30—Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
- A61K6/887—Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- A61K6/889—Polycarboxylate cements; Glass ionomer cements
Definitions
- the invention relates to a polyalkenoate cement having improved properties for biomedical or dental applications.
- Polycarboxylic acids which are able to bind both the apatite of the tooth and the glass of the cement complex on their C ions.
- a schematic representation of the crosslinking of polyacrylic acid by Ca 2+ is shown:
- cements adhere well to the dentin and enamel of the tooth and show good sealing properties when used as a filling material in cavities. They prevent the entry of liquids and bacteria and thus protect against secondary caries. However, these cements are moisture sensitive prior to the setting process and are also acid soluble. Also, the optical properties (translucency) do not meet the current demands of aesthetics.
- Aqueous solutions of poly (VPA) have a pH of about 1.5.
- poly (VPA) is a stronger acid than polyacrylic acid and other polycarboxylic acids, thus enabling the production of more mechanically strong cements with the adhesive properties of the cements described above.
- Copolymers of vinylphosphonic acids with acrylic acid or other carboxylic acids can also be used to make such cements.
- EP 0340016 B1 describes that the setting time of a cement prepared with polyacrylic acid is reduced from about 3-4 minutes to 45 seconds when exchanged with poly (VPA), and it has not yet been considered that the cement is mixed must be processed.
- the object of the invention was to obtain a well-applied in practice phosphorus-based polyalkenoate cement, in the important properties - such as sufficient processing time at fast hardening time, such as lower solubility, such as good mechanical strength and better aesthetics - the conventional Polyalkenoatzementen listed above based on polycarboxylic acids is far superior.
- the object of the invention has surprisingly been achieved by finding new polyalkenoic cements which are suitable for biomedical and / or dental applications and contain the following components (a) to (d):
- the components (a) to (c) may be mixed with the ion-releasing fine-particle glass (component (d)), especially in the presence of water, and react to a cement.
- Cements containing the combination of (b) and (c) according to the invention exhibit an application-friendly, sufficient processing time, an improved hardening
- Bonding characteristics improved mechanical properties, such. As higher hardness or lower abrasion and even improved optical properties.
- the compositions according to the invention contain an acidic solution comprising the components (a), (b) and (c) and (ii) an acid-soluble glass (component (d)).
- the acidic solution (liquid) comprises components (a), (b) and (c).
- the multivalent cations also referred to herein as "rapidly available multivalent cations" are available within a short time after the termination of the processing time for the setting reaction, which is in contrast to the cements known from the prior art in which to complete Availability of multivalent cations from the glass powder several hours pass.
- the component (b) may be added to the powdery glass (component (d)) in dried form.
- the liquid thus comprises components (a) and (c) in this embodiment.
- the acidic, phosphorus-based polyalkenoate polymer (component (a)) may be admixed to the powdered glass (component (d)) in dried form.
- the liquid thus comprises in this embodiment, components (b) and (c).
- both the acidic, phosphorus-based polyalkenoate polymer (component (a)) and the acid-soluble salt (component (b)) may be dried in the powdered glass (component (d))
- the liquid thus includes in this
- Embodiment only the component (c).
- Embodiments are also possible in which components (a) and / or (b) are added in dried form to component (d) and are additionally present in dissolved form in the liquid.
- the acidic, phosphorus-based polyalkenoate polymers can be both homopolymers of vinylphosphonic acid, homopolymers of vinylphosphoric acid and copolymers of vinylphosphonic acid and / or polymers of unsaturated phosphoric acids, which are optionally copolymerized with unsaturated carboxylic acids. These mentioned polyacids can also be used partially esterified. Also suitable are vinylphosphonic acid esterified with unsaturated carboxylic acids, vinylphosphonic acid esterified with unsaturated phosphonic acids and vinylphosphonic acid esterified with unsaturated phosphoric acids.
- Suitable monomers for the synthesis of the desired acidic, phosphorus-based polyalkenoate polymers or copolymers may, for. Vinylphosphonic acid, ⁇ -methyl-vinylphosphonic acid, styrene-vinylphosphonic acid, acrylic acid, 2-chloroacrylic acid, 3-chloroacrylic acid, 2-bromoacrylic acid, 3-bromoacrylic acid, methacrylic acid, itaconic acid, maleic acid, glutaric acid, citraconic acid, mesaconic acid, fumaric acid and tiglic acid.
- Suitable monomers for the copolymerization with said unsaturated phosphorus-based acids may, for. Acrylamide, acrylonitrile, vinyl chloride, allyl chloride, vinyl acetate and 2-hydroxyethyl methacrylate.
- component (a) comprises a copolymer Polyvinylphosphonic acid with unsaturated carboxylic acids, especially with maleic acid, acrylic acid, itaconic acid or combinations thereof.
- the proportion of component (a) in the liquid is preferably 10 to 70% by weight. More preferably 20-60% by weight, even more preferably 30-50% by weight.
- the acid soluble salt or acid soluble compound of a polyvalent (ie multivalent) metal cation (component (b)) must be soluble in an aqueous solution of the acidic, phosphorus based polyalkenoate polymer in the presence of (c) without precipitate formation.
- Suitable salts or compounds for this combination may, for.
- divalent cations such as Ca 2+ , Sr 2+ , Ba 2+ , Ce 2+ , TiO 2+ , ZrO 2+ , Fe 2+ , Co 2+ , Cu 2+ , Zn 2+ or, preferably, trivalent cations such as Sc 3+ , Y 3+ , La 3+ , Yb 3+ , Cr 3+ , Mo 3+ , W 3+ , Fe 3+ , Ru 3+ , Os 3+ , Au 3+ , Al 3+ , Ga 3+ , be in 3+ .
- divalent cations such as Ca 2+ , Sr 2+ , Ba 2+ , Ce 2+ , TiO 2+ , ZrO 2+ , Fe 2+ , Co 2+ , Cu 2+ , Zn 2+ or, preferably, trivalent cations such as Sc 3+ , Y 3+ , La 3+ , Yb 3+ , Cr 3+ , Mo 3+ ,
- Anions of the acid-soluble salt or the acid-soluble compound of a multivalent metal may, for. O 2 " , [CO 3 ] 2" , Cl-, [SO 4 ] 2 " , [PO 4 ] 3" , [HPO 4 ] 2 " , [H 2 PO 4 ] “ , [HPO 2 ] 2 " , [H 2 PO 3 ] " .
- Suitable as constituent of component (b) are, for example, Al 2 (SO 4 ) 3 / AlCl 3 , FeCl 3 and AlH 6 (PO 4 ) 3 .
- the metal salts are used as Dihydrogenphosphatsalze, which can also represent a component of component (c) simultaneously. Particularly preferred here is AlH 6 (PO 4 ) 3 .
- the proportion of the component (b) in the liquid is preferably 0.1-50% by weight. -%, more preferably 0.1 - 10 wt .-%, even more preferably 0.1 - 5 wt. -%.
- the non-polymeric acidic phosphorus compound (component (c)) may be organic-inorganic or purely inorganic in nature. It may be phosphoric acid or a phosphoric acid derivative, it may be a phosphonic acid or a phosphonic acid derivative. Also suitable are acid phosphates and acid phosphonates or combinations with the aforementioned. Acid esters of these phosphorus-containing monomers are also suitable.
- Preferred examples are monophosphonic acids, diphosphonic acids or ortho-phosphoric acid, more preferably diphosphonic acids and ortho-phosphoric acid.
- Preferred examples of acid phosphonates are bis (chloroethyl) vinyl phosphonates.
- the proportion of component (c) in the liquid which may comprise components (a), (b) and / or (c), is preferably from 0.1 to 50% by weight, more preferably from 5 to 30% by weight. %, even more preferably 10-20% by weight.
- Suitable ion-releasing, finely divided glasses (component (d)) which can react with the components (a), (b), and (c) in the presence of water are ion-releasing glasses from the prior art, such. B. with divalent metal cations doped aluminosilicate glasses and melts containing fluoride, alkali metal ions and / or phosphates. These glasses are reactive and are preferably characterized by a SiO 2 / Al 2 O 3 ratio of 0.6-5.0: 1, particularly preferably 2.0-5.0: 1.
- the glass may be a purely synthetic glass or may comprise a natural mineral which, for example, initially reacts with an acid via a gel, as described, for example, in EP 0 883 586 B1.
- a preferred example of a synthetic glass is an aluminosilicate glass, for example, by melting together quartz (SiO 2 ) and aluminum oxide (Al 2 O 3 ), optionally with the addition of one or more suitable fluoride, carbonate and / or phosphate Salt, such as CaF 2 , CaCO 3 , AlPO 4 , Ca 3 PO 4 and the like, can be prepared.
- Such synthetic glasses are well known in the art and are described, for example, by AD Wilson et al.
- a glass in the sense of this invention may also comprise a so-called "non-fused oxyfluoride material" which, besides a trivalent metal ion (preferably aluminum), oxygen and fluoride ions, also comprises alkaline earth metal ions such as strontium, calcium and barium.
- non-fused oxyfluoride material which, besides a trivalent metal ion (preferably aluminum), oxygen and fluoride ions, also comprises alkaline earth metal ions such as strontium, calcium and barium.
- finely divided means that the glasses have a particle diameter with a D 99 value of less than 100 ⁇ m, preferably less than 30 ⁇ m, more preferably less than 20 ⁇ m.
- the particle diameter is given in the usual way as the average particle diameter (D 50 or D 99 value) and can be determined, for example, using a "sediment analyzer" measuring device.
- the D 50 value of the particle diameter of the finely divided glass particles is from 0.5 to 20 ⁇ m, more preferably 5 ⁇ m or less, and particularly preferably from 0.5 to 5.0 ⁇ m.
- the D 99 value of the particle diameter of the finely divided glass particles is preferably from 2 to 40 ⁇ m, more preferably 30 ⁇ m or less, and particularly preferably from 2 to 30 ⁇ m.
- the ratio of the glass (component (d)) to the liquid is preferably from 5: 1 to 0.5: 1, more preferably from 3: 1 to 0.8: 1.
- a higher glass content is advantageous having a preferred glass to liquid ratio of from 4.0: 1 to 2.0: 1, more preferably from 3.0: 1 to 2.0: 1.
- a lower glass content has proved to be advantageous with a preferred ratio of glass to liquid of 1: 1 to 0.6: 1, more preferably of about 0.8: 1.
- Component (d) may additionally comprise a water-soluble or at least partially water-soluble multivalent metal cation compound from which a sufficiently high proportion is dissolved during the initial hardening phase of the mixed cement.
- at least partially water-soluble here means that at least 2 g, preferably at least 4 g of the multivalent metal cation compound can be dissolved in 100 mL of water at room temperature.
- sufficiently high level means that at least at least 30%, preferably at least 60%, more preferably at least 90% of the multivalent metal cation compound is dissolved during the initial curing phase of the mixed cement.
- the term "initial cure phase” refers to e.g. to a period of 0-10 minutes, preferably 0-5 minutes after mixing component (d) with the remaining components. In special applications, the initial hardening phase can also be a period of 0-30 min or even 0-60 min.
- the use of the cements according to the invention is conceivable for various biomedical and dental indications.
- the application as aesthetic dental restorative and fastening material.
- the cements may be in powder / liquid form, the liquid being an aqueous solution of the acidic components.
- the acidic components may also be partially or wholly in the powder in substantially dried form.
- the components of the cements according to the invention may also be in paste form, the otherwise commonly used paste formers such as thickeners, humectants and also resins - especially hydrophilic resins - are incorporated into the corresponding components of this invention.
- the cement of the invention may further contain one or more conventional additives and additives, such as suitable indicators, dyes, pigments, inhibitors, accelerators, viscosity modifiers, wetting agents, surfactants, buffers, stabilizers, chelating agents, and the like, known in the art.
- the cement may also contain one or more drugs or therapeutic substances, such as fluorinating agents, anti-caries agents (eg, xylitol), remineralizing agents (eg, calcium phosphate compounds), contrast agents, and the like conventionally used in the art in dental cements.
- the liquids were mixed with an ion-releasing, finely divided glass (EonGlass, Benco, United States) in a ratio of glass to liquid of 2.4: 1.
- Tables 1 and 2 illustrate that both component (b) and component (c) are necessary for physical property improvement. Omission of (b) leads to too fast setting and to mechanically weak cements, while without the component (c) only turbid and inhomogeneous liquids are obtained, which makes mixing of a homogeneous cement impossible.
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- Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Surgery (AREA)
- Chemical & Material Sciences (AREA)
- Plastic & Reconstructive Surgery (AREA)
- Dental Preparations (AREA)
- Materials For Medical Uses (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011515226A JP2011526268A (ja) | 2008-06-30 | 2009-06-30 | 特性が改善されたポリアルケノエートセメント |
EP09772138A EP2291166A2 (de) | 2008-06-30 | 2009-06-30 | Polyalkenoat-zemente mit verbesserten eigenschaften |
US13/000,691 US20110144231A1 (en) | 2008-06-30 | 2009-06-30 | Polyalkenoate Cements Having Improved Properties |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008030326A DE102008030326A1 (de) | 2008-06-30 | 2008-06-30 | Polyalkenoat-Zemente mit verbesserten Eigenschaften |
DE102008030326.7 | 2008-06-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2010000438A2 true WO2010000438A2 (de) | 2010-01-07 |
WO2010000438A3 WO2010000438A3 (de) | 2010-04-29 |
Family
ID=40957548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/004699 WO2010000438A2 (de) | 2008-06-30 | 2009-06-30 | Polyalkenoat-zemente mit verbesserten eigenschaften |
Country Status (5)
Country | Link |
---|---|
US (1) | US20110144231A1 (de) |
EP (1) | EP2291166A2 (de) |
JP (1) | JP2011526268A (de) |
DE (1) | DE102008030326A1 (de) |
WO (1) | WO2010000438A2 (de) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0340016A2 (de) * | 1988-04-27 | 1989-11-02 | Btg International Limited | Polyvinylphosphonsäure und Metalloxid, Cermet oder Glasionomer enthaltender Zement |
EP0431740A1 (de) * | 1989-10-26 | 1991-06-12 | Btg International Limited | Polyvinylphosphonsäure enthaltender Glasionomerzement |
GB2291060A (en) * | 1994-07-09 | 1996-01-17 | Albright & Wilson Uk Ltd | Cement compositions |
EP0883586A1 (de) * | 1996-02-29 | 1998-12-16 | Btg International Limited | Durch reaktion zwischen organischen polysäuren und basen hergestellter zement |
EP1632211A1 (de) * | 2004-09-07 | 2006-03-08 | S & C Polymer Silicon- und Composite-Spezialitäten GmbH | Harzmodifzierter Dentalzement auf Polyalkenoatbasis |
EP1634563A1 (de) * | 2004-09-07 | 2006-03-15 | S & C Polymer Silicon- und Composite-Spezialitäten GmbH | Polyalkenoat-Zahnzementzusammensetzung |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2264498A (en) | 1992-02-19 | 1993-09-01 | British Tech Group | Dental cement |
-
2008
- 2008-06-30 DE DE102008030326A patent/DE102008030326A1/de not_active Withdrawn
-
2009
- 2009-06-30 JP JP2011515226A patent/JP2011526268A/ja not_active Withdrawn
- 2009-06-30 EP EP09772138A patent/EP2291166A2/de not_active Withdrawn
- 2009-06-30 US US13/000,691 patent/US20110144231A1/en not_active Abandoned
- 2009-06-30 WO PCT/EP2009/004699 patent/WO2010000438A2/de active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0340016A2 (de) * | 1988-04-27 | 1989-11-02 | Btg International Limited | Polyvinylphosphonsäure und Metalloxid, Cermet oder Glasionomer enthaltender Zement |
EP0431740A1 (de) * | 1989-10-26 | 1991-06-12 | Btg International Limited | Polyvinylphosphonsäure enthaltender Glasionomerzement |
GB2291060A (en) * | 1994-07-09 | 1996-01-17 | Albright & Wilson Uk Ltd | Cement compositions |
EP0883586A1 (de) * | 1996-02-29 | 1998-12-16 | Btg International Limited | Durch reaktion zwischen organischen polysäuren und basen hergestellter zement |
EP1632211A1 (de) * | 2004-09-07 | 2006-03-08 | S & C Polymer Silicon- und Composite-Spezialitäten GmbH | Harzmodifzierter Dentalzement auf Polyalkenoatbasis |
EP1634563A1 (de) * | 2004-09-07 | 2006-03-15 | S & C Polymer Silicon- und Composite-Spezialitäten GmbH | Polyalkenoat-Zahnzementzusammensetzung |
Also Published As
Publication number | Publication date |
---|---|
US20110144231A1 (en) | 2011-06-16 |
EP2291166A2 (de) | 2011-03-09 |
JP2011526268A (ja) | 2011-10-06 |
WO2010000438A3 (de) | 2010-04-29 |
DE102008030326A1 (de) | 2009-12-31 |
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