| abstract |
To separate a catalyst for polymerizing a monomer contained in a liquid or paste dental composition containing at least a monomer, such as a dental resin cement, an autopolymerizing dental resin or a resin-reinforced dental glass ionomer cement, from the liquid or paste dental composition to thereby improve storage stability of the dental composition and reduce number of division of the dental composition, an extrusion nozzle for a dental composition mounted on one end of an extruder for extruding a liquid or paste dental composition containing at least a monomer, the extrusion nozzle contains a catalyst for polymerizing the monomer contained in the dental composition during extrusion, and the catalyst is attached to an inner wall of an extruding channel of the extrusion nozzle. |