Gc Corporation

Masataka Itoda

Hiroshi Kamohara

Takeo Suga

Yasuhiro Yokoyama

Shuichi Nomura

Hideaki Yasaki

A full denture base manufacturing method is provided that can easily manufacture a full denture base, using a set of maxillary impression tray and a mandibular impression tray for taking an impression from a patient including an edentulous patient. An impression material is applied on each of a maxillary impression trayand a mandibular impression trayconfiguring a set of impression trays, and respectively having a U-shaped groove, the U-shaped groove having a front surface side on which the impression material is to be applied and being provided with projecting partson a back surface side thereof, and the applied impression material is pressed against an alveolar ridge within an oral cavity and set, to determine bite position and height in a state in which at least a part of flat top surfaces of the projecting partscontact each other, the second impression material is applied between back surfaces of the impression traysand set in a state in which at least a part of the flat top surfaces contact each other, each of the impression traysand the impression material are removed from within the oral cavity in one piece of the maxillary and mandibular impression trays, or separately in two pieces of the maxillary and mandibular impression trays, and a model material is thereafter injected to each impression material on the removed maxillary and mandibular impression trays and set, in order to manufacture an edentulous jaw model, and the edentulous jaw model is set on an articulator in a state in which the bite position and height that are determined in advance are reflected, in order to manufacture a full denture base.

Full denture base manufacturing method

An impression tray set for edentulous jaw is formed by a maxillary impression tray and a mandibular impression tray respectively including a tray main body having a U-shaped groove on which an impression material is to be applied on a front surface thereof, an engaging part formed on a back surface of the U-shaped groove in a position corresponding to an alveolar ridge of front teeth, and a handle part detachably connected to the engaging part. Each of the maxillary and mandibular impression trays includes projecting parts provided on the back surface at portions corresponding to an alveolar ridge from a first molar part to a premolar part. The projecting parts determine bite position and height in a state in which at least a part of flat top surfaces of the projecting parts contact each other when taking an impression.

Impression tray set for edentulous jaw

Tray for dental impression extraction

Growing community of inventors

Osaka, Japan

Masataka Itoda