Abstract: A lip muscle strengthening device includes: an upper plate inserted into a mouth of a user including a first electrode formed on a bottom surface; a lower plate inserted into the mouth of the user including a second electrode formed on a top surface; an outer support plate adhered to an outer lip of the user and supporting a front end of the upper plate and a front end of the lower plate in a connected state while separating the upper plate and the lower plate from each other; and a pressure recognition unit connected to the first electrode and the second electrode and enabling the user to recognize a closed state of the mouth when the user pushes the upper plate and the lower plate with the upper lip and the lower lip and the first electrode and the second electrode contact each other.

Abstract: A lip muscle strengthening device includes: an upper plate inserted into a mouth of a user including a first electrode formed on a bottom surface; a lower plate inserted into the mouth of the user including a second electrode formed on a top surface; an outer support plate adhered to an outer lip of the user and supporting a front end of the upper plate and a front end of the lower plate in a connected state while separating the upper plate and the lower plate from each other; and a pressure recognition unit connected to the first electrode and the second electrode and enabling the user to recognize a closed state of the mouth when the user pushes the upper plate and the lower plate with the upper lip and the lower lip and the first electrode and the second electrode contact each other.

Abstract: Orthodontic braces include: a correction frame provided to cover a corresponding group of teeth by having, on an inner surface, a correction recess corresponding to a correct tooth form of teeth, and formed of a soft or hard material; and a support frame tightly coupled to surround an outer surface of the correction frame, and formed of soft or hard material, wherein a coupling groove portion is formed at an edge end portion of an outer surface of the correction frame, and a coupling bent portion correspondingly engaged and coupled to the coupling groove portion is formed at an edge end portion of an inner surface of the support frame.