Abstract: Provided is a dental articulator, and more particularly, a dental articulator, in which a tray keeping a shape and dimensions of a dental model is fitted into an upper portion of a base member to which the dental model is coupled. Particularly, the tray coupled to a top surface of the base member is geometrically similar to the base member, and includes a boundary wall formed along an edge thereof at a predetermined thickness and height, a through-hole formed inside the boundary wall, and a pin cap structure that has a plurality of fitting holes into which pins of a pin structure of the base member are fitted and which are continuously formed along an inner central axis of the through-hole and that is connected to opposite inner ends of the boundary wall. Further, each of the arcuate and linear boundary walls of the tray has a plaster anti-overflow flange formed at an upper end thereof and bent in an outward direction to prevent plaster from overflowing down.

Abstract: A dental floss casing includes a bobbin fixer fixing therein a bobbin around which the thread of dental floss is wound, a transparent window coupled thereto to allow the state of the bobbin fitted in the bobbin fixer to be checked, front and rear covers detachably coupled to each other, a dental floss-drawing section provided in one side of the front or rear cover such that the thread of dental floss wound around the bobbin is drawn to the outside therethrough, and a dental floss cutter provided adjacent to one side of the front or rear cover to cut the thread of dental floss that is drawn.