Orthodontic appliance and pliers for orthodontics

An orthodontic appliance comprising:

• a base member fixed to two or more screws adapted to be implanted in a vicinity of median palatine suture of a palate bone;
• an arm-shaped arm member having a first connecting portion connected to the base member and a second connecting portion adapted to be located in a vicinity of palatal side of a tooth;
• and
• a traction member that is made of a wire material which is elastic and pulls a tooth as a traction target,
• the traction member having:
• a traction base portion fixed to the second connecting portion;
• a traction fixation portion hooked on a bracket that is adapted to be fixed to the traction target located away from the traction base portion;
• and
• a traction force generation portion that is located between the traction base portion and the traction fixation portion and applies a rearward traction force and a frontward rotational force or a frontward traction force and a rearward rotational force to the bracket via the traction fixation portion,
• the traction fixation portion having a bent portion in the wire material, and adapted to extend along dentition so that the wire material is plastically deformed and bent toward a tooth root side, the bent portion being hooked on a portion of the bracket that protrudes to a palate side of the bracket.