The present invention is related to a curable dental two-pack composition comprising: (a) a first paste comprising (a-1) one or more crosslinker having at least four primary amino groups; and (b) a second paste comprising (b-1) one or more compounds polymerizable with a crosslinker of the first paste in a step-growth polymerization reaction; wherein (b-1) the compound polymerizable with the crosslinker compounds is a compound of the following formula (II):

##STR00001## wherein A is a hydrocarbon group which may contain one or more hetero atoms selected from oxygen and sulfur atoms: R.sup.1 is as defined in claim 1; R.sup.4, R.sup.5, R.sup.6 and R.sup.7 are independent from each other and represent a hydrogen atom or a methyl group and the Y, which are independent from each other represent a single bond, an oxygen atom, a sulfur atom, an ester bond or a urethane bond.

The present invention is related to a curable dental two-pack composition comprising: (a) a first paste comprising (a-1) one or more crosslinker having at least four primary amino groups; and (b) a second paste comprising (b-1) one or more compounds polymerizable with a crosslinker of the first paste in a step-growth polymerization reaction; wherein (b-1) the compound polymerizable with the crosslinker compounds is a compound of the following formula (II):

##STR00001## wherein A is a hydrocarbon group which may contain one or more hetero atoms selected from oxygen and sulfur atoms: R.sup.1 is as defined in claim 1; R.sup.4, R.sup.5, R.sup.6 and R.sup.7 are independent from each other and represent a hydrogen atom or a methyl group and the Y, which are independent from each other represent a single bond, an oxygen atom, a sulfur atom, an ester bond or a urethane bond.

Dental composition comprising (a) a homogeneous phase comprising monomer combinations (i) and (ii), (i) and (iii), (ii) and (iii), or (i), (ii) and (iii), or comprising monomer (iii), wherein (i) represents one or more compounds having one or more radically polymerizable carbon-carbon double bonds; (ii) represents one or more compounds having one or more cationically polymerizable groups; and (iii) represents one or more compounds having a combination of one or more radically polymerizable carbon-carbon double bonds and one or more cationically polymerizable groups; (b) an initiator system comprising (iv) one or more radical polymerization initiator of the following formula (I): ##STR00001##
wherein M is Ge or Si; R.sup.1, R.sup.2 and R.sup.3 may be the same or different, independently represent an organic group, and R.sup.4 represents a hydrogen atom, an organic or organometallic group; provided that when R.sup.4 is a hydrogen atom, the initiator system further comprises a sensitizer compound having a light absorption maximum in the range from 300 to 600 nm; (v) a cationic polymerization initiator, which is a compound selected from the following formula (II), (III) and (IV): ##STR00002##
wherein R.sup.5 and R.sup.6, which may be the same or different, independently represent an aryl group which may have a substituent; and Y.sup.− represents an anion; ##STR00003##
wherein R.sup.7, R.sup.8 and R.sup.9 which may be the same or different, independently represent an aryl group which may have a substituent; and Y.sup.− represents an anion; ##STR00004## R.sup.10, R.sup.11, R.sup.12, and R.sup.13 which may be the same or different, independently represent an alkyl or aryl group which may have a substituent; and Y.sup.− represents an anion.

Dental composition comprising (a) a homogeneous phase comprising monomer combinations (i) and (ii), (i) and (iii), (ii) and (iii), or (i), (ii) and (iii), or comprising monomer (iii), wherein (i) represents one or more compounds having one or more radically polymerizable carbon-carbon double bonds; (ii) represents one or more compounds having one or more cationically polymerizable groups; and (iii) represents one or more compounds having a combination of one or more radically polymerizable carbon-carbon double bonds and one or more cationically polymerizable groups; (b) an initiator system comprising (iv) one or more radical polymerization initiator of the following formula (I): ##STR00001##
wherein M is Ge or Si; R.sup.1, R.sup.2 and R.sup.3 may be the same or different, independently represent an organic group, and R.sup.4 represents a hydrogen atom, an organic or organometallic group; provided that when R.sup.4 is a hydrogen atom, the initiator system further comprises a sensitizer compound having a light absorption maximum in the range from 300 to 600 nm; (v) a cationic polymerization initiator, which is a compound selected from the following formula (II), (III) and (IV): ##STR00002##
wherein R.sup.5 and R.sup.6, which may be the same or different, independently represent an aryl group which may have a substituent; and Y.sup.− represents an anion; ##STR00003##
wherein R.sup.7, R.sup.8 and R.sup.9 which may be the same or different, independently represent an aryl group which may have a substituent; and Y.sup.− represents an anion; ##STR00004## R.sup.10, R.sup.11, R.sup.12, and R.sup.13 which may be the same or different, independently represent an alkyl or aryl group which may have a substituent; and Y.sup.− represents an anion.

Dental composition comprising (a) a homogeneous phase comprising monomer combinations (i) and (ii), (i) and (iii), (ii) and (iii), or (i), (ii) and (iii), or comprising monomer (iii), wherein (i) represents one or more compounds having one or more radically polymerizable carbon-carbon double bonds; (ii) represents one or more compounds having one or more cationically polymerizable groups; and (iii) represents one or more compounds having a combination of one or more radically polymerizable carbon-carbon double bonds and one or more cationically polymerizable groups; (b) an initiator system comprising (iv) one or more radical polymerization initiator of the following formula (I): ##STR00001##
wherein M is Ge or Si; R.sup.1, R.sup.2 and R.sup.3 may be the same or different, independently represent an organic group, and R.sup.4 represents a hydrogen atom, an organic or organometallic group; provided that when R.sup.4 is a hydrogen atom, the initiator system further comprises a sensitizer compound having a light absorption maximum in the range from 300 to 600 nm; (v) a cationic polymerization initiator, which is a compound selected from the following formula (II), (III) and (IV): ##STR00002##
wherein R.sup.5 and R.sup.6, which may be the same or different, independently represent an aryl group which may have a substituent; and Y.sup.− represents an anion; ##STR00003##
wherein R.sup.7, R.sup.8 and R.sup.9 which may be the same or different, independently represent an aryl group which may have a substituent; and Y.sup.− represents an anion; ##STR00004## R.sup.10, R.sup.11, R.sup.12, and R.sup.13 which may be the same or different, independently represent an alkyl or aryl group which may have a substituent; and Y.sup.− represents an anion.

The present disclosure provides a root-canal sealer composition including cement and a hygroscopic liquid, in which the cement includes tricalcium silicate (3CaO.SiO.sub.2) in which an aluminum atom (Al) is solid-soluted (Al solid-soluted C3S), dicalcium silicate (2CaO.SiO.sub.2) in which an aluminum atom (Al) is solid-soluted (Al solid-soluted C2S), and tricalcium aluminate (3CaO.Al.sub.2O.sub.3) in which a silicon atom (Si) is solid-soluted (Si solid-soluted C3A), the tricalcium aluminate being disposed between at least one selected from the group consisting of the Al solid-soluted C3S and the Al solid-soluted C2S. When the cement including aluminum solid-soluted tricalcium silicate, aluminum solid-soluted dicalcium silicate, and silicon solid-soluted tricalcium aluminate is prepared and used for a root-canal sealer composition, a curing time is reduced and compressive strength is increased. Also, the root-canal sealer composition is effective at ensuring a sufficient working time, thereby improving workability and storage stability.

The present disclosure provides a root-canal sealer composition including cement and a hygroscopic liquid, in which the cement includes tricalcium silicate (3CaO.SiO.sub.2) in which an aluminum atom (Al) is solid-soluted (Al solid-soluted C3S), dicalcium silicate (2CaO.SiO.sub.2) in which an aluminum atom (Al) is solid-soluted (Al solid-soluted C2S), and tricalcium aluminate (3CaO.Al.sub.2O.sub.3) in which a silicon atom (Si) is solid-soluted (Si solid-soluted C3A), the tricalcium aluminate being disposed between at least one selected from the group consisting of the Al solid-soluted C3S and the Al solid-soluted C2S. When the cement including aluminum solid-soluted tricalcium silicate, aluminum solid-soluted dicalcium silicate, and silicon solid-soluted tricalcium aluminate is prepared and used for a root-canal sealer composition, a curing time is reduced and compressive strength is increased. Also, the root-canal sealer composition is effective at ensuring a sufficient working time, thereby improving workability and storage stability.

Provided is a biostable radiopaque substance that is absorbed within living tissue or inflammatory lesion in living tissue and uses thereof. The radiopaque substance does not cause an inflammatory reaction in surrounding tissue and is rapidly absorbed before healing occurs, thereby not interfering with healing and regeneration of damaged tissue. Therefore, the radiopaque substance of the present disclosure can be included in a biotransplantation material, for example, a root canal filling material for endodontic treatment, and be effectively used.

Provided is a biostable radiopaque substance that is absorbed within living tissue or inflammatory lesion in living tissue and uses thereof. The radiopaque substance does not cause an inflammatory reaction in surrounding tissue and is rapidly absorbed before healing occurs, thereby not interfering with healing and regeneration of damaged tissue. Therefore, the radiopaque substance of the present disclosure can be included in a biotransplantation material, for example, a root canal filling material for endodontic treatment, and be effectively used.

A dental pulp capping composition can comprise a particulate base material which is non-toxic, and capable of forming a structural capping matrix; and a particulate setting material which is non-toxic, water-soluble, biocompatible, and capable of setting the composition. Optional growth factors can also be introduced into the composition to facilitate dental tissue repair. A complimentary method of restoring damaged tooth features can comprise removing diseased and/or damaged portions of the tooth to expose a prepared tooth region. Water can be added to the dental pulp capping composition to form a workable coherent paste. The workable coherent paste can be introduced into the prepared tooth region. The workable coherent paste can then be shaped within the prepared tooth region and then set to form a rigid biomimetic structure within the prepared tooth region.