A dentin regenerative cell culture that can bring about a rapid regeneration of dentin in a deficit region. In the treatment of a tooth using the dentin regenerative cell culture, a root canal where a pulpectomy has been performed is filled with a root canal filler containing dental pulp stem cells. The dentin regenerative cell culture is then implanted in the deficit region of dentin, and temporary sealing with a packing is carried out. The dentin regenerative cell culture is formed three-dimensionally in conformity with the shape of the deficit region with the coalescence of cell masses of a plurality of odontoblasts, and thus the dentin regeneration is well promoted. In addition, gaps between the dentin regenerative cell culture and biological tissue can be rapidly filled. Infection due to bacterial infiltration can thereby be prevented.

A dental restoration device includes a sleeve having an exterior surface and an interior pocket that is at least partially filled with a dental cement, and a crown having an exterior surface and an interior surface that is mated to the exterior surface of the crown and bonded thereto by an adhesive disposed between the exterior surface of the sleeve and the interior surface of the crown.

A dental restoration device includes a sleeve having an exterior surface and an interior pocket that is at least partially filled with a dental cement, and a crown having an exterior surface and an interior surface that is mated to the exterior surface of the crown and bonded thereto by an adhesive disposed between the exterior surface of the sleeve and the interior surface of the crown.

Provided are a blank for dental cutting having a part to be cut made from a resin material, wherein the resin material includes a composite material in which inorganic particles are dispersed in a resin matrix, the inorganic particles are made from aggregates of inorganic spherical particles having a specific average primary particle diameter, have a narrow particle size distribution, and include one or a plurality of spherical particle groups of the same particle diameter (G-PID) having a refractive index smaller than that of the resin matrix and an ultrafine particle group (G-SFP), and the arrangement structure of all of the inorganic spherical particles constituting the spherical particle groups of the same particle diameter in the resin matrix has a short-range ordered structure that fulfills specific conditions, and a method for producing the same.

A root canal filling material composition comprising a lithium salt has higher healing promoting activity than conventional root canal filling material compositions. Preferable compositions are (1) a composition further comprising a calcium hydroxide, (2) a combination composition of a paste A containing a higher fatty acid and rosin and a paste B containing magnesium oxide and a vegetable oil, and one or both of the paste A and the paste B comprise the lithium salt, and (3) a combination composition of a paste A and a paste B and hardens by mixing the paste A and the paste B, one or both of the paste A and the paste B comprise the lithium salt, one or both of the paste A and the paste B comprise a glass powder, the glass powder contains calcium oxide and silicon dioxide in a total amount of 50 to 100% by weight relative to a total amount of the glass powder, and in the glass powder, a weight ratio of the calcium oxide to the silicon dioxide (calcium oxide:silicon dioxide) is 6:4 to 3:7.

A root canal filling material composition comprising a lithium salt has higher healing promoting activity than conventional root canal filling material compositions. Preferable compositions are (1) a composition further comprising a calcium hydroxide, (2) a combination composition of a paste A containing a higher fatty acid and rosin and a paste B containing magnesium oxide and a vegetable oil, and one or both of the paste A and the paste B comprise the lithium salt, and (3) a combination composition of a paste A and a paste B and hardens by mixing the paste A and the paste B, one or both of the paste A and the paste B comprise the lithium salt, one or both of the paste A and the paste B comprise a glass powder, the glass powder contains calcium oxide and silicon dioxide in a total amount of 50 to 100% by weight relative to a total amount of the glass powder, and in the glass powder, a weight ratio of the calcium oxide to the silicon dioxide (calcium oxide:silicon dioxide) is 6:4 to 3:7.

A polymerization apparatus according to an embodiment of the present invention includes: a light irradiator; and a polymerization vessel. The light irradiator includes a first casing and a light source assembly. The first casing includes a light source chamber defined by cylindrical side walls, a ceiling, and a floor including a light-transmissive window member. The light source assembly includes a base having a light-emitting surface on which a plurality of light-emitting diodes is disposed in a predetermined pattern and a heat-dissipating surface to which a heat sink is joined, and the light source assembly is disposed within the light source chamber so that the light-emitting surface faces the light-transmissive window member. The polymerization vessel includes a polymerization cup and a second casing. The polymerization cup has a frustoconical or substantially frustoconical shape that opens upward and increases in diameter upward, and is capable of housing an object therein. The second casing is a bottomed cylindrical or box-shaped casing having an opening at the apex thereof, the polymerization cup being attachably/detachably housed in the second casing via the opening. In this polymerization apparatus, light that has been emitted by the plurality of light-emitting diodes of the light irradiator and has passed through the light-transmissive window member is applied to the inside of the polymerization cup of the polymerization vessel.

An example article may include a dental surface, a hydrophobic coating on the dental surface, and a restorative layer on the hydrophobic coating. An example technique may include applying, on a dental surface, a hydrophobic coating comprising an amphiphilic agent. The hydrophobic coating may provide a water contact angle of greater than or equal to about 50° on the dental surface. The example technique may include applying a restorative layer to the hydrophobic coating. An example kit may include a dental restorative composition and a hydrophobic coating composition. The hydrophobic coating composition may include an amphiphilic agent. The hydrophobic coating composition may be configured to provide a water contact angle of greater than or equal to about 50° on a dental surface.

An example article may include a dental surface, a hydrophobic coating on the dental surface, and a restorative layer on the hydrophobic coating. An example technique may include applying, on a dental surface, a hydrophobic coating comprising an amphiphilic agent. The hydrophobic coating may provide a water contact angle of greater than or equal to about 50° on the dental surface. The example technique may include applying a restorative layer to the hydrophobic coating. An example kit may include a dental restorative composition and a hydrophobic coating composition. The hydrophobic coating composition may include an amphiphilic agent. The hydrophobic coating composition may be configured to provide a water contact angle of greater than or equal to about 50° on a dental surface.

Provided is a curable composition containing a polymerizable monomer (A), an organic-inorganic composite filler (B), and a polymerization initiator (C), wherein the organic-inorganic composite filler (B) includes an organic resin matrix (b1) and a spherical inorganic filler (b2) having an average primary particle size of 230-1000 nm, 90% or more of the number of individual particles constituting the spherical inorganic filler (b2) are present in a range of 5% greater or less than the average primary particle size, and the curable composition satisfies the following formulas (1) and (2):
nP<nF.sub.b2  (formula 1)
and nM.sub.b1<nF.sub.b2  (formula 2) In the formulas, nP represents the refractive index of the polymer of the polymerizable monomer (A) at 25° C., nF.sub.b2 represents the refractive index of the spherical inorganic filler (b2) at 25° C., and nM.sub.b1 represents the refractive index of the organic resin matrix (b1) at 25° C.