초록 ▼

This disclosure is directed to a dental syringe and a disposable syringe tip for use therewith, and more particularly to an improved syringe tip constructed to minimize the entrainment of air by the material being extruded and to provide a dentist with a maximum of visibility during use. The syringe

This disclosure is directed to a dental syringe and a disposable syringe tip for use therewith, and more particularly to an improved syringe tip constructed to minimize the entrainment of air by the material being extruded and to provide a dentist with a maximum of visibility during use. The syringe tip includes a cylindrical body portion to define a reservoir that is provided with a conically shaped, closed front end and a full opening at the other end, which is adapted to be sealed by a displaceable piston. The closed front end is provided with an internal frusto-conical chamber disposed in communication with an angularly offset discharge nozzle having its passageway at the inner end thereof disposed contiguous to the blunt end of the internally disposed frusto-conical chamber; and the disposable piston having a frusto-conical end portion to complement the shape of the internal front end of the syringe tip to enhance the complete evacuation of the material disposed within the syringe tip without the entrainment of any air.

대표청구항 ▼

A syringe tip for use in a dental syringe for the placement of a predetermined amount of a viscous dental composite resin filling material in a tooth to form a tooth restoration comprising a body portion having a generally cylindrical shape to define a reservoir portion for containing a predetermine

A syringe tip for use in a dental syringe for the placement of a predetermined amount of a viscous dental composite resin filling material in a tooth to form a tooth restoration comprising a body portion having a generally cylindrical shape to define a reservoir portion for containing a predetermined amount of dental filling material. said body portion having an opening co-extensive to the cylindrical shape of said reservoir portion at one end thereof, a laterally extending flange circumscribing said opening, and said body portion having a tapering closed end at the other end thereof disposed in axial alignment with the axis of said body portion, said tapering closed end having an internal conically shaped wall surface tapering toward said closed end terminating in a blunt internal end wall, said internal conically shaped wall surface defining an internal frustro conical chamber being disposed in open communication with and forming a continuation of said reservoir portion, and a discharge nozzle angularly disposed relative to said closed end, said discharge nozzle including a passageway through which the material contained in said internal frustro conical chamber and reservoir portion is adapted to be extruded, and a displaceable piston for sealing the open end of said reservoir portion; said displaceable piston having a conical front end complementing said internal conically shaped wall surface.