Abstract: An object of the present invention is to provide a dental composition having excellent adhesive effect and simultaneously not causing microleakage. A dental composition of a first embodiment of the present invention includes (A) an acidic-group containing polymerizable monomer, (B) a polymerizable monomer, (C) a filler comprising poly(meth)acrylate particles, (D) a calcium-containing material including tetracalcium phosphate (TTCP) and dicalcium phosphate (DCP), and (E) a polymerization initiator. The component (A) is contained at 16-70 parts by weight based on a total of 100 parts by weight of (A)+(B). The component (B) is contained at 84-30 parts by weight based on a total of 100 parts by weight of (A)+(B). The component (C) is contained at 0.2-297 parts by weight relative to a total of 100 parts by weight of (A)+(B). The component (D) is contained at 0.2-297 parts by weight relative to a total of 100 parts by weight of (A)+(B).

Abstract: Provided is a cutting bar for dental use that can cut both dentin and enamel with a single bar unanesthetically and efficiently without causing any pain or unpleasant sensation in a patient, in particular, a cutting bar for dental use that can fundamentally solve the problem in that a cutting blade of a cutting bar rotating at low speed comes into contact with hard enamel present in a surface layer of a tooth during cutting of carious dentin to cause unpleasant sensation in a patient. A cutting bar for dental use includes a head in which a cutting blade is formed; a neck leading to the head; and a handle joined to the neck through an intermediation of a joint portion, wherein diamond abrasive grains are electrodeposited in a predetermined range extending from a substantially maximum diameter portion of the head to the neck.