To pressurize and fill a fine root canal and a bent root canal physicochemically stably, with easy sterilization and disinfection, with good contrast, and without harmful action on periapical periodontium and whole body tissue by providing a filling point which is made of a copolymer of propylene and ethylene and contains a contrast medium.
This root canal filling point is made mainly of a copolymer of a propylene and ethylene, and it is not the foreign matter property in a living body so that it is not absorbed and is simultaneously physically and physicochemically stable without causing elusion of ingredients. It has high elasticity and crushing resisting force, and simultaneously at the time of sterilization, chemical resistance, heat resistance and radiation resistance are shown. Therefore, it is very suitable as the root canal filling point. The root canal filling point is formed by dissolving a copolymer of propylene and ethylene and mixing it with a contrast medium such as a barium sulfate or the like and completed by injection molding. Thus, the root canal filling point having high elasticity, hardness and crushing resisting force can easily be inserted in a fine root canal of a tooth of a person.
YAMAZAKI YASUO
SHIIKI KAZUO
