CALCIUM AND FLUORINE IONS RELEASING DENTAL COMPOSITION

1 . A dental composition comprising polymerizable components,

initiator suitable for curing the polymerizable components,

a Ca-ions releasing component having a Ca-ions releasing capability of 400 to 700 mg/l if 2.5 g Ca-ions releasing component is steered in 50 ml de-ionized water having a pH of 2 for 24 hours,

a F-ions releasing component having a F-ions releasing capability of 1,500 to 3,500 mg/l if 2.5 g F-ions releasing component is steered in 50 ml de-ionized water having a pH of 7 for 24 hours,

the amount of Ca-ions releasing component contained in the dental composition being higher than the amount of F-ions releasing component with respect to weight.

2 . The dental composition according to claim 1 , the Ca-ions releasing component comprising a basic core material that releases Ca-ions, and an inorganic shell material comprising a metal oxide surrounding the core.

3 . The dental composition according to claim 1 , the Ca-ions releasing component comprising a basic core material comprising a CaO component, in particular a calcium silicate such as 3CaO—SiO 2 and 2CaO—SiO 2 , and an inorganic shell material comprising Al 2 O 3 or SiO 2 surrounding the core.

4 . The dental composition according to claim 1 , the F-ions releasing component being characterized by the following features alone or in combination:

molecular weight: 110 to 300 g/mol; water solubility: 3 to 20 g/l water at 23° C.

5 . The dental composition according to claim 1 , the F-ions releasing component having the formula A n MF m with

A being an alkali metal ion or NR 4 + , with R being C 1 to C 18 alkyl, phenyl or substituted phenyl, M being selected from Ti, Zr, Al, Zn, P, n being 1 to 3, m being 3 to 6.

6 . The dental composition according to claim 1 , the F-ions releasing component being selected from KZnF 3 , K 2 TiF 6 , and mixtures thereof.

7 . The dental composition according to claim 1 , the ratio of Ca-ions releasing component contained in the dental composition to F-ions releasing component being in a range of 1:0.9 to 1:0.1 with respect to weight.

8 . The dental composition according to claim 1 , the Ca-ions releasing component and the F-ions releasing component being present in the dental composition in amounts sufficient to enable a release of

F-ions in an amount of at least 10 ppm per 1 g of cured composition stored in de-ionized water over 30 days at 36° C., and

Ca-ions in an amount of at least 2 ppm per 1 g of cured composition stored in de-ionized water over 30 days at 36° C.

9 . The dental composition according to claim 1 , the initiator comprising a redox-initiator system comprising an oxidizing agent, a reducing agent, and optionally a transition metal component, the reducing agent being a thiourea component comprising a (meth)acrylate moiety.

10 . The dental composition according to claim 1 , the dental composition being a resin-modified glass ionomer cement composition comprising

polymerizable components with acidic moiety,

polymerizable components without acidic moiety,

polyacid,

water,

acid-reactive glass,

a Ca-ions releasing component comprising a basic core comprising a material that releases Ca-ions, and an inorganic shell material comprising a metal oxide surrounding the core,

a F-ions releasing component having the formula A n MF m with A being an alkali metal ion or NR 4 + , R being C 1 to C 18 alkyl, phenyl or substituted phenyl, M being selected from Ti, Zr, Al, Zn, P, n being 1 to 3, m being 3 to 6,

a redox-initiating system comprising an oxidizing agent, a reducing agent, and optionally a transition metal component,

optionally non acid-reactive filler,

optionally additive(s).

11 . The dental composition according to claim 1 , comprising the components in the following amounts:

polymerizable components with acidic moiety in an amount of 0.5 to 15 wt. %,

polymerizable components without acidic moiety in an amount of 1 to 50 wt. %,

polyacid in an amount of 1 to 25 wt. %,

acid-reactive glass in an amount of 5 to 70 wt. %,

water in an amount of 0.25 to 20 wt. %,

non acid-reactive filler in an amount of 0 to 40 wt. %,

Ca-ions releasing component comprising a basic core comprising a material that releases Ca-ions, and an inorganic shell material comprising a metal oxide surrounding the core, in an amount of 0.5 to 30 wt. %,

F-ions releasing component having the formula A n MF m with A being an alkali metal ion or NR 4 + , R being C 1 to C 18 alkyl, phenyl or substituted phenyl, M being selected from Ti, Zr, Al, Zn, P, n being 1 to 3, m being 3 to 6, in an amount of 0.1 to 20 wt. %,

redox-initiating system comprising an oxidizing agent, a reducing agent, and optionally a transition metal component, in an amount of 0.2 to 6 wt. %,

photo-initiator in an amount of 0 to 2 wt. %,

additives in an amount of 0 to 15 wt. %,

wt. % with respect to the weight of the whole composition.

12 . The dental composition according to claim 1 , not comprising the following components alone or in combination:

NaF in an amount of more than 0.5 wt. %;

AlF 3 anhydrous in an amount of more than 0.5 wt. %;

CaCO 3 in an amount of more than 0.5 wt. %;

CaCl 2 ) in an amount of more than 0.5 wt. %;

Ca(OH) 2 in an amount of more than 0.5 wt. %;

wt. % with respect to the whole composition.

13 . The dental composition according to claim 1 , being provided as a kit of parts comprising an acidic part and a non-acidic part, the acidic part and the non-acidic part being preferably provided in a ratio of 3:1 to 1:3 with respect to volume,

the acidic part comprising

polymerizable components with acidic moiety,

polymerizable components without acidic moiety,

an oxidizing component,

polyacid,

non acid-reactive filler,

water,

the non-acidic part comprising

polymerizable components without acidic moiety,

optionally a photo-initiator,

reducing agent, preferably a (polymerizable) thiourea reducing agent,

acid-reactive glass,

Ca-ions releasing component,

F-ions releasing component.

14 . A kit of parts comprising the dental composition according to claim 1 , including the following items alone or in combination: dental adhesive, dental milling block, prefabricated dental crown.

15 . (canceled)

16 . A kit of parts comprising the dental composition according to claim 13 , including the following items alone or in combination: dental adhesive, dental milling block, prefabricated dental crown.