DISPOSABLE SYRINGE FOR A TWO-GRADIENT DENTAL MATERIAL AND TUBULAR CANNULA OF A DISPOSABLE SYRINGE Russian patent published in 2022 - IPC A61C5/62 

FIELD: medicine.

SUBSTANCE: group of inventions relates to medicine and medical equipment and can be used for mixing and dispensing two-gradient dental materials. Disposable syringe for a two-gradient dental material comprises a tubular cannula connected with two cylindrical bodies by a mixing chamber. Pistons with rods are placed in the cavities of the cylindrical bodies. A thrust end finger jumper links the ends of the rods. The pistons are equipped with sealing rings made of an elastic material. Rings are located by the ends of the pistons oriented towards the mixing chamber. The pointed tubular elements placed in the mixing chamber are made to pierce the ends of the output channels of the cavities of the cylindrical bodies. The opposing ends of the pistons are made with conical guide depressions for orienting the tapering ends of the rods, equipped with annular stops for the interaction with the end walls of the cylindrical bodies by the rod insertion holes, the diameters whereof are smaller than the diameters of the annular stops by an amount at least exceeding the thickness of one end wall. Each cylindrical body by the end oriented towards the mixing chamber is made with an annular inner locking recess for a sealing ring, the diameter whereof is greater than the diameter of half the depth of the recess. The body cavities are filled with dental material gradients required for at least a single dose of the two-gradient dental material.

EFFECT: higher convenience of using a disposable syringe to manually dose two ingredients of a dental material supplied for mixing the resulting composition in the mouth immediately before use.

2 cl, 2 dwg