METHOD FOR PRODUCING DENTAL PROSTHESES, READY-TO-USE DENTAL MATERIAL, AND KIT CONTAINING THE DENTAL MATERIAL

Abstract

A method for the production of dental prosthetic moulded parts as well as a ready for use, polymerisable dental material for the production of dental prosthetic moulded parts, such as of total or partial prostheses, parts of bridges, crowns, is proposed. The ready for use dental material, optionally after mixing the separated two paste dental material having an initiator system separated into the pastes and otherwise being essentially identical dental material, is immediately curable or polymerisable, respectively, into prosthetic moulded parts without swelling time. A kit comprising the ready for use, polymerisable dental material, as well as the use of the kit and a method for the production of dental prosthetic moulded parts is also a subject matter of the invention.

Claims

1. A method for the production of dental prosthetic moulded parts, comprising the steps of using a ready for use, polymerisable dental material as at least one paste in at least one cartridge, discharging the ready for use dental material, optionally by mixing the dental material, and charging the dental material into a negative mould for the production of at least one dental prosthetic moulded part, and optionally, polymerising the dental material.

2. The method according to claim 1, wherein the dental material is separated as paste A and paste B in one cartridge or in two cartridges and is mixed when discharging.

3. The method according to claim 1, wherein charging into the negative mould ensues pneumatically.

4. The method according to claim 1, wherein during polymerisation further dental material is charged into the negative mould.

5. A polymerisable dental material for the production of dental prosthetic moulded parts having a viscosity of 1000 mPa.Math.s to 75000 mPa.Math.s and comprising a mixture of monomers and optionally polymers, being present as single phase in the mixture.

6. The dental material according to claim 5, wherein the mixture of monomers and optionally polymers, being present as single phase, comprises p1 (1) 25 to 90% by weight at least one urethane (meth)acrylate, or a mixture comprising at least two urethane (meth)acrylates, (2) 0.5 to 40% by weight at least one di(meth)acrylate without urethane groups or a mixture comprising at least two di(meth)acrylates, (3) 0 to 40% by weight at least one tri-, tetra- or higher functional (meth)acrylate without urethane groups or a mixture comprising at least two of the afore mentioned (meth)acrylates, based on the total composition of the dental material of 100% by weight.

7. The dental material according to claim 5, wherein 0.1 to 60% by weight of at least one inorganic filler is dispersed in the phase, wherein the total composition of the dental material is 100% by weight.

8. The dental material according to claim 5 comprising (4) 0.1 to 60% by weight inorganic, amorphous filler or a mixture of inorganic fillers, and/or (5) 0.01 to 5% by weight of an initiator or initiator system for hot- or cold-polymerisation, wherein the total composition of the dental material is 100% by weight.

9. The dental material according to claim 5 comprising (i) at least one urethane di(meth)acrylate, and (ii) at least one urethane tri(meth)acrylate.

10. The dental material according to claim 5, wherein at least one urethane (meth)acrylate, urethane di(meth)acrylate, urethane tri(meth)acrylate or one multifunctional urethane (meth)acrylate is contained, such as comprising urethane dimethacrylate, urethane di(meth)acrylate from the reaction of an ,-functionalised alkyldiisocyanate OCN(CH.sub.2).sub.nCNO with n=2 to 20, with an HO functional acrylate, an urethane dimethacrylate, an bis(methacryloxy-2-ethoxycarbonylamino)alkylene aliphatic polyester of a triurethane triacrylate, diurethane acrylate oligomer, alkyl-functional urethane dimethacrylate oligomers, aromatically functionalised urethane dimethacrylate oligomers, aliphatic unsaturated urethane acrylates, bis(methacryloxy-2-ethoxycarbonylamino)-substituted polyether, aromatic urethane diacrylate oligomers, aliphatic urethane diacrylate oligomers, monofunctional urethane acrylates, aliphatic urethane diacrylates, hexafunctional aliphatic urethane resins, aliphatic urethane triacrylate, UDMA, aliphatic urethane acrylate oligomer, unsaturated aliphatic urethane acrylate.

11. The dental material according to claim 5, wherein at least one di(meth)acrylate without urethane groups comprising di-, tri- or tetraethylene glycol di(meth)acrylate, propoxylated neopentylglycol diacrylate, alkyldiol di(meth)acrylate with C2 to C15 in the alkyl group, decanediol di(meth)acrylate, dodecanediol di(meth)acrylate, hexyldecanediol di(meth)acrylate, butanediol di(meth)acrylate, ethylene glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate, ethoxylated/propoxylated bisphenol-A di(meth)acrylate and/or HDDMA (1,6-hexanediol dimethacrylate), bisphenol-A di(meth)acrylate (BPDMA), 1,4-butanediol dimethacrylate (1,4-BDMA), Bis-GMA monomer bisphenol-A glycidylmethacrylate (an addition product of methacrylic acid and bisphenol-A diglycidylether), methacrylate-based difunctional monomer comprising a polyisocyanurate group and/or diethylene glycol di(meth)acrylate is contained.

12. The dental material according to claim 5, wherein at least one tri-, tetra- or higher function (meth)acrylate without urethane groups comprises tri- or tetraethylene glycol di(meth)acrylate, trimethylol propane tri(meth)acrylate, methacrylate-based tri- and/or tetra-functional monomer comprising polyisocyanurate groups, tris(2-hydroxyethyl)isocyanurate triacrylate and/or pentaerythritol tetraacrylate.

13. The dental material according to claim 5, wherein the inorganic filler is an amorphous inorganic filler, comprising pyrogenic silicic acid or an inorganic filler comprising precipitated silicic acid, dental glasses, such as aluminosilicate glasses or fluoroaluminosilicate glasses, barium aluminium silicate, strontium silicate, strontium borosilicate, lithium silicate, lithium aluminium silicate, phyllosilicates, zeolites, amorphous spherical fillers on oxide or mixed oxide basis, glass fibres and/or carbon fibres, as well as mixtures comprising at least one of the afore-mentioned fillers.

14. A kit comprising a polymerisable dental material for the production of dental prosthetic moulded parts, wherein the dental material is ready for use as paste having a viscosity of 1000 mPa.Math.s to 75000 mPa.Math.s in at least one cartridge.

15. The kit having a paste A and a paste B, wherein pastes A and B, each independently, comprise a mixture of monomers and optionally polymers, each being present as a single phase in the mixture and, in particular, wherein (a) paste A has a viscosity of 1000 mPa.Math.s to 75000 mPa.Math.s, comprises (a1) at least one urethane (meth)acrylate, (a2) at least one di(meth)acrylate without urethane groups, (a3) at least one tri-, tetra- or higher functional (meth)acrylate without urethane groups, and (a4) optionally, at least one inorganic filler, and wherein (b) paste B has a viscosity of 1000 mPa.Math.s to 75000 mPa.Math.s, and comprises (b1) at least one urethane (meth)acrylate, (b2) at least one di(meth)acrylate without urethane groups, (b3) at least one tri-, tetra- or higher functional (meth)acrylate without urethane groups, and (b4) optionally, at least one inorganic filler, wherein the optional filler (a4) and/or (b4) is dispersed in the phase of the mixture, and wherein at least one of the pastes A and/or B comprises as component (a5) or (b5), respectively, at least one content of a (a5) radical initiator or radical initiator system for hot- or cold-polymerisation, wherein the total composition in paste A and B is 100% by weight in each case.

16. The kit according to claim 15, wherein (a) paste A has a viscosity of 1000 mPa.Math.s to 75000 mPa.Math.s, and comprises a mixture of (a1) 25 to 80% by weight at least one urethane (meth)acrylate, or a mixture comprising at least two urethane (meth)acrylates, (a2) 0.5 to 40% by weight at least one di(meth)acrylate without urethane groups or a mixture comprising at least two di(meth)acrylates, (a3) 0 to 40% by weight at least one tri-, tetra- or higher functional (meth)acrylate without urethane groups or a mixture comprising at least two of the afore mentioned (meth)acrylates, (a4) optionally, 0.1 to 60% by weight inorganic filler and (b) paste B has a viscosity of 1000 mPa.Math.s to 75000 mPa.Math.s, and comprises a mixture of (b1) 25 to 80% by weight at least one urethane (meth)acrylate, or a mixture comprising at least two urethane (meth)acrylates, (b2) 0.5 to 40% by weight at least one di(meth)acrylate without urethane groups or a mixture comprising at least two di(meth)acrylates, (b3) 0 to 40% by weight at least one tri-, tetra- or higher functional (meth)acrylate without urethane groups or a mixture comprising at least two of the afore mentioned (meth)acrylates, (b4) optionally, 0.1 to 60% by weight inorganic filler, and wherein at least one of the pastes A and/or B or both pastes A and B comprises as component (a5) or (b5), respectively, at least 0.01 to 5% by weight of a (a5) radical initiator or radical initiator system for hot- or cold-polymerisation, wherein the total composition in paste A and B is 100% by weight in each case.

17. The kit according to claim 14, wherein pastes A and B are respectively separated in a cartridge.

18. The kit according to claim 17, wherein at least one cartridge has an electric sensor.

19. A dental material according to claim 5, being completely polymerised.

20. Method of using a kit according to claim 14 comprising the polymerisable dental material for the production of dental prosthetic moulded parts.

21. Method of using a dental material according to claim 5 for the production of dental prosthetic moulded parts, parts of dental prostheses, dental total prostheses, orthopedic prostheses or parts thereof, artificial teeth, veneers, inlays, onlays, superstructures, dental carrier structures, bridges, crowns, relinings, denture saddles, bone prostheses, joint prostheses, revision total joint endoprostheses and/or spacers.

22. The method according to claim 21, wherein the dental material is, after mixing or when discharging and optionally mixing, directly charged from the cartridge into a negative mould or cuvette for the production of at least one dental prosthetic moulded part and polymerised.

Description

EXAMPLES

[0078]

TABLE-US-00001 TABLE 1 Formula cold-polymerising prosthetic material according to the invention (stated in % by weight) Component A Component B urethane dimethacrylate 62% 62% aliphatic polyester triurethane acrylate 13% 13% dodecandiol dimethacrylate 5% 5% ethoxylated bisphenol-A dimethacrylate 5% 5% alkoxylated pentaerythritol tetraacrylate 10% 10% pyrogenic silicic acid 4% 4% BHT <0.5% <0.5% Cu(II)Cl.sub.2 0.001% X methyltrioctylammonium chloride 0.2% X PBS (phenylbenzylbarbituric acid) X 1% BBS (butylbarbituric acid) X 0.2%

[0079] A swelling time of the mixture is not necessary anymore. The dental mixture is immediately ready for use.

TABLE-US-00002 TABLE 2 Comparison of processing times According to the PalaXpress (not invention according to the invention) weighing 0 30 sec. mixing 0 30 sec. swelling 0 3 min. injecting 10 min. 10 min. polymerising 30 min. 30 min.

TABLE-US-00003 TABLE 3 Comparison of properties of the polymerisable dental material according to the invention when processing in mixing unit and in the static mixer of a double chamber cartridge (stated in % by weight) Example 2 (Composition Example 1 as Example 1) Component Component Component Component A B A B Mixing ratio 1:1 1:1 propoxylated 20.000 20.000 20.000 20.000 neopentylglycol diacrylate UDMA 30.000 30.000 30.000 30.000 TEDMA 9.000 9.000 9.000 9.000 nano-part SiO.sub.2 40.000 39.500 40.000 39.500 Cu(II)Cl.sub.2 0.100 0.100 methyltrioctylammonium chloride 0.170 0.170 Y-terpinene 0.230 0.230 cumene hydroperoxide 1.000 1.000 acetylthiourea 1.000 1.000 total 100.00 100.00 100.00 100.00 Mixing the pastes Mixing the pastes Paste A Paste B Paste A Paste B flexural >60 [MPa] 64.9 66.9 strength E-modulus >1500 [MPa] 2463 2240 curing processing via x Hausschild.sup.[1] processing by x static mixer.sup.[2] pressure unit x x Palamat elite 55 C. 20 min .sup.[1]Mixing components A and B according to the principle of rotary mixer in the mixing unit (Speedmixer 150); .sup.[2]Mixing by stating mixer of the double cartridge

[0080] Ready for use pastes A have a viscosity of about 7600 mPa.Math.s (determined at a shear rate of 1/10 sec), pastes B have a viscosity of about 14100 mPa.Math.s under the terms mentioned. A 1:1 mixture of the two pastes A and B has a viscosity of about 12900 mPa.Math.s. The polymerisable dental material meets the requirements of DIN ISO 20795-1: 2013-06, if the prosthesis material is mixed according to both methods. Thus, a ready for use dental material for the production of prostheses may be provided in a simple and economic manner via the method according to the invention, in particular with a polymerisable, ready for use dental material according to the invention having a viscosity of 2000 mPa.Math.s to 15000 mPa.Math.s. As described above, the method according to the invention reduces the number of steps and the time spend in the production of prostheses.

[0081] Packaging materials+mixer: The two components A and B are filled in a customary double chamber cartridge, mixing in ratio 1:1. Those cartridges are being offered, for example, by the companies Sulzer Mixpac or Ritter. The static mixer shall be as short as possible having an outer diameter of approx. 8 mm.

[0082] The use according to the invention is shown in the figures. According to FIG. 1, a double chamber cartridge is filled with the polymerisable dental material according to the invention. FIGS. 3a, 3b and 3c show the use in a hand injection method for the production of prosthetic moulded parts, in which the dental material may directly be filled by the static mixer into the casting cuvette in order to polymerise in the cuvette (FIG. 3b: casting cuvette, FIG. 4: Palajet cuvette).

[0083] Pneumatic injection method (Palajet): The static mixer screwed on the double chamber cartridge is inserted into the injection opening of a Palajet cuvette, as shown in FIGS. 2a and 2b. After fixing the cuvette in the Palajet and sealing of the injection opening, the dental material is injected from the cartridge into the cuvette. During polymerisation of the dental material in the cuvette, further material is conveyed from the cartridge in order to compensate polymerisation shrinkage. In this way, exact prostheses result. According to the immediate usability shown in the figures of the ready for use, polymerisable dental material, time for the production of the prostheses may considerably be reduced for the user. In addition, direct contact with the skin or breathing of volatile components is being avoided using the dental material according to the invention.