Traction device and maxillary traction device

A maxillary traction device comprising:

• a mouthpiece to be attached to a maxilla inside a mouth of a human body;
• and
• a traction device comprising an engaging assembly engaging with the mouthpiece and a support assembly supporting the engaging assembly in contact with a face of the human body, the engaging assembly to pull the mouthpiece in an anterior direction of the human body,
• the support assembly comprising:
• an upper contact body configured to be in contact with a forehead of the face;
• and
• a lower contact body configured to be in contact with an area of the face below the forehead and above a mandible,
• the mouthpiece comprising:
• a forward extension extending in the anterior direction of the human body to an exterior of the mouth of the human body;
• and
• a curved member curvedly extending outside the mouth from a part of the forward extension disposed outside the mouth of the human body in a posterior direction of the human body,
• the traction device comprising:
• a forward elastic body to pull the forward extension in the anterior direction of the human body by an elastic force;
• and
• a rotational elastic body to pull a first posterior end, which is an end of the curved member in the posterior direction of the human body, in a superior direction of the human body by an elastic force so as to apply torque to the mouthpiece being pulled in the anterior direction of the human body to rotate the mouthpiece in a rotational direction that moves a second posterior end, which is an end of the mouthpiece in the posterior direction of the human body inside the mouth, in the superior direction of the human body and an anterior end, which is an end of the mouthpiece in the anterior direction of the human body inside the mouth, in an inferior direction of the human body.