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US 8,044,113 B2Granted
Dental root canal filling material
AssigneeDENTSPLY International Inc.
InventorJoachim E. Klee
Life of this patent
Estimating the term…
Abstract
A dental root canal sealing composition curable in the absence of a polymerisation initiator, which comprises (i) an amino terminated prepolymer having a viscosity at 23° C. of less than 100 Pas. (ii) a compound capable of undergoing polyaddition with the aminoterminated prepolymer (i); (iii) 40 to 85 wt.-% of a filler for providing a minimum radioopacity of at least 3 mm/mm Al.
Claims12
A dental root canal sealing composition, which comprises
- (i) an amino terminated prepolymer having a viscosity at 23° C. of less than 100 Pas, which is obtained by reacting
- (a) one mole of a compound of the following formula (I)
- wherein
- Z represents
- an n-valent C2-42 hydrocarbon group, which groups may contain 1 to 6 oxygen atoms, and which may be substituted by 1 to 6 C1-4 alkyl groups;
- X represents
- a single bond or
- an oxygen atom or a nitrogen atom substituted by a C1-4 alkyl group;
- L represents
- a single bond or
- an optionally substituted C1-6 alkylene group, an optionally substituted C6-14 arylene group, an optionally substituted C7-16 alkylenearylene group, an optionally substituted C7-16 arylenealkylene group,
- which groups may be substituted by 1 to 6 C1-4 alkyl groups;
- and
- n represents
- an integer of from 2 to 6;
- and
- (b) at least n moles of one or more compounds
- (b1) of the following formula (II)
- wherein
- A represents a divalent saturated aliphatic C2-16 hydrocarbon group or a divalent saturated cycloaliphatic C3-6 hydrocarbon group, which groups may contain 1 to 6 oxygen atoms, and which may be substituted by 1 to 6 C1-4 alkyl groups;
- Ra and Rb are the same or different and represent a hydrogen atom, a C1-6 alkyl or a C3-14 cycloalkyl group, which may be substituted by one or more members of the group selected from a C1-4 alkyl group, C1-4 alkoxy group, a phenyl group, and a hydroxy group;
- or
- (b2) of formula (III)
- R′NH2 (III)
- wherein R′ represents
- a substituted or unsubstituted C1 to C18 alkyl group,
- a substituted or unsubstituted C3 to C18 cycloalkyl group,
- a substituted or unsubstituted C7 to C30 aralkyl group, which groups may be substituted by one or more members of the group selected from a C1-4 alkyl group, C1-4 alkoxy group, a phenyl group, and a hydroxy group,
- optionally in combination with a further di- or polyamine compound;
- (ii) a compound capable of undergoing polyaddition with the aminoterminated prepolymer (i);
- (iii) 40 to 85 wt.-% of a filler for providing a minimum radioopacity of at least 3 mm/mm Al.
28 more elements
The dental root canal sealing composition according to any one of the preceding claims, wherein n is 2.
The dental root canal sealing composition according to any one of the preceding claims, wherein the aminoterminated prepolymer is a prepolymer of one of the following formulas
- wherein
- R represents a divalent substituted or unsubstituted C1 to C18 alkylene group, substituted or unsubstituted C6-14 arylene group, substituted or unsubstituted C3 to C18 cycloalkylene group, substituted or unsubstituted C7 to C30 arylenealkylenearylene group,
- R1 represents
- hydrogen or
- a substituted or unsubstituted C1 to C18 alkyl group,
- a substituted or unsubstituted C3 to C18 cycloalkyl group,
- a substituted or unsubstituted C7 to C30 aralkyl group,
- R2 represents a divalent
- substituted or unsubstituted C1 to C18 alkylene group,
- a substituted or unsubstituted C3 to C18 cycloalkylene group,
- a substituted or unsubstituted C7 to C30 aralkylene group, and
- n is an integer.
9 more elements
An amino terminated prepolymer having a viscosity at 23° C. of less than 100 Pas, which is obtained by reacting
- (a) one mole of a compound of the following formula (I)
- wherein
- Z represents an n-valent C2-42 hydrocarbon group, which groups may contain 1 to 6 oxygen atoms, and which may be substituted by 1 to 6 C1-4 alkyl groups;
- X represents
- a single bond or
- an oxygen atom or a nitrogen atom substituted by a C1-6 alkyl group;
- L represents
- a single bond or
- an optionally substituted C1-16 alkylene group,
- an optionally substituted C6-14 arylene group,
- an optionally substituted C7-16 alkylarylene group,
- an optionally substituted C7-16 arylalkylene group,
- which groups may be substituted by 1 to 6 C1-4 alkyl groups;
- and
- n represents an integer of from 2 to 6;
- and
- (b) at least n moles of one or more compounds
- (b1) of the following formula (II)
- wherein
- A represents a divalent saturated aliphatic C2-16 hydrocarbon group or a divalent saturated cycloaliphatic C3-6 hydrocarbon group, which groups may contain 1 to 6 oxygen atoms, and which may be substituted by 1 to 6 C1-4 alkyl groups;
- Ra and Rb are the same or different and represent a hydrogen atom, a C1-6alkyl or a C3-14 cycloalkyl group, which may be substituted by one or more members of the group selected from a C1-4 alkyl group, C1-4 alkoxy group, a phenyl group, and a hydroxy group;
- or
- (b2) of formula (III)
- R′NH2 (III)
- wherein R′ represents
- a substituted or unsubstituted C1 to C18 alkyl group,
- a substituted or unsubstituted C3 to C18 cycloalkyl group,
- a substituted or unsubstituted C7 to C30 aralkyl group, which groups may be substituted by one or more members of the group selected from a C1-4 alkyl group, C1-4 alkoxy group, a phenyl group, and a hydroxy group,
- optionally in combination with a further di- or polyamine compound, in a dental composition.
26 more elements
Dependencies are inferred from the claim text.