Patent ID: 6951678

Claim:
A mouth guard-preparing sheet for use with a heating and suction device for forming the sheet into a mouth guard, said mouth guard-preparing sheet comprising a thermoplastic resin having a plane shape adapted to be substantially coincident with a shape of a fixed frame of the heating and suction device, said mouth guard-preparing sheet is provided with a mouth guard portion pressed on a previously prepared gypsum cast wherein a dentition and gingival in an oral cavity are reproduced, and an elongation tab portion in an external direction of an anterior side of said mouth guard portion, wherein said mouth guard portion has a uniform thickness of from 1.5 to 10 mm; said elongation tab portion which does not compose the mouth guard has a thickness of 0.1˜0.95 times the thickness of said mouth guard portion; and a stepped portion between the mouth guard portion and the elongation tab portion is in a straight line.