A (e.g. hardenable dental) composition is described comprising (e.g. a first part comprising) an encapsulated material wherein the encapsulated material comprises a basic core material and an inorganic shell material comprising a metal oxide surrounding the core; and (e.g. a second part comprising) water or an acidic component. Also described is an encapsulated material (e.g. suitable for use in a biological carrier material) comprising a basic core material and an inorganic shell material comprising a metal oxide surrounding the core.

A dental bulk block for machining, which is a glass-ceramic block including a crystalline phase in an amorphous glass matrix. The bulk block is a functionally graded material including crystalline phases where among the crystalline phases, a main crystalline phase is lithium disilicate, and an additional crystalline phase includes quartz, lithium phosphate, and at least one selected from among cristobalite and tridymite, in which the main crystalline phase has a size gradient with respect to a depth, and no interface is present at a point where a size gradient value of the main crystalline phase changes. Thus, the bulk block is useful in manufacturing artificial tooth prostheses that are similar to natural teeth and thus can not only reduce the time and processes for manufacturing artificial tooth prostheses but also obtain the effect of enhancing structural stability in terms of force distribution based on functionally graded mechanical characteristics.

The present invention provides a dental cement that excels in ease of handling without its powder-to-liquid ratio greatly affecting ease of handling such as kneadability or ease of filling as compared to traditional dental portland cements, and that can provide a hardened material having excellent compressive strength. The present invention relates to a dental cement comprising a powder component and a liquid component, wherein: the powder component comprises a portland cement powder (A), the liquid component comprises water (C), and at least one of the powder component and the liquid component comprises a cationic surfactant (B). Preferably, the liquid component comprises the cationic surfactant (B).

The subject invention pertains to a novel glass-ionomer cement (NGIC) that provides an alternative restorative material for dental amalgams being phased out; has improved mechanical properties compared to conventional glass-ionomer cement (GIC) products; has improved adhesive properties compared to conventional GIC products; provides sufficient biocompatibility; can release ions to promote remineralization of the teeth, which inhibits tooth decay; can inhibit growth of bacteria, which inhibits tooth decay; provides increased retention time and decreased frequency of replacement in the oral cavity. Formulations of the subject invention can include powders and solutions containing silicate glass, poly(vinylphosphonic acid) (PVPA), nanosilver bioactive glass, and polyacrylic acid.

The subject invention pertains to a novel glass-ionomer cement (NGIC) that provides an alternative restorative material for dental amalgams being phased out; has improved mechanical properties compared to conventional glass-ionomer cement (GIC) products; has improved adhesive properties compared to conventional GIC products; provides sufficient biocompatibility; can release ions to promote remineralization of the teeth, which inhibits tooth decay; can inhibit growth of bacteria, which inhibits tooth decay; provides increased retention time and decreased frequency of replacement in the oral cavity. Formulations of the subject invention can include powders and solutions containing silicate glass, poly(vinylphosphonic acid) (PVPA), nanosilver bioactive glass, and polyacrylic acid.

Hydraulic cements and hardened materials obtained after hydration of the hydraulic cements, especially cements useful in the medical field such as dental cements. In particular, a hydraulic cement including calcium silicate particles and calcium carbonate particles having specific particles sizes. The hydration of the hydraulic cement enables to provide a hardened composite material with reinforcing properties, having calcium silicate particles dispersed in a solid dispersant phase including calcium silicate hydrates (CSH) and porous intergranular areas including insoluble calcium carbonate particles having a d.sub.50 granulometry ranging from 1 nm to 1500 nm.

Hydraulic cements and hardened materials obtained after hydration of the hydraulic cements, especially cements useful in the medical field such as dental cements. In particular, a hydraulic cement including calcium silicate particles and calcium carbonate particles having specific particles sizes. The hydration of the hydraulic cement enables to provide a hardened composite material with reinforcing properties, having calcium silicate particles dispersed in a solid dispersant phase including calcium silicate hydrates (CSH) and porous intergranular areas including insoluble calcium carbonate particles having a d.sub.50 granulometry ranging from 1 nm to 1500 nm.

The present disclosure provides a root-canal sealer composition including cement and a hygroscopic liquid, in which the cement includes tricalcium silicate (3CaO.Math.SiO.sub.2) in which an aluminum atom (Al) is solid-soluted (Al solid-soluted C3S), dicalcium silicate (2CaO.Math.SiO.sub.2) in which an aluminum atom (Al) is solid-soluted (Al solid-soluted C2S), and tricalcium aluminate (3CaO.Math.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.Math.SiO.sub.2) in which an aluminum atom (Al) is solid-soluted (Al solid-soluted C3S), dicalcium silicate (2CaO.Math.SiO.sub.2) in which an aluminum atom (Al) is solid-soluted (Al solid-soluted C2S), and tricalcium aluminate (3CaO.Math.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 block body that makes it possible to quickly produce a dental prosthesis with a good accuracy. A material of the block body including SiO.sub.2 in an amount of 60.0 mass % to 80.0 mass %, Li.sub.2O in an amount of 10.0 mass % to 20.0 mass %, Al.sub.2O.sub.3 in an amount of 5.1 mass % to 10.0 mass %, wherein the block body is formed in a column, and a main crystalline phase of the block body is lithium disilicate.