Mandibular positioning facial retrognathism orthodontic system and design method thereof

A mandibular positioning facial retrognathism orthodontic system, comprising:

• a maxillary shell-like dental appliance having a plurality of shell-like bodies;
• wherein each of the plurality of shell-like bodies of the maxillary shell-like dental appliance is provided with a plurality of cavities for accommodating teeth, a protrusion portion protruding toward an opposite jaw is disposed at a posterior area corresponding to each of the plurality of shell-like bodies of the maxillary shell-like dental appliance, a traction portion is disposed at a labial side of each of the plurality of shell-like bodies of the maxillary shell-like dental appliance, and a retaining portion is disposed at the posterior area corresponding to each of the plurality of shell-like bodies of the maxillary shell-like dental appliance, wherein the retaining portion is configured for fastening with a retaining attachment;
• the protrusion portion is configured to engage with the posterior area of a mandible to open occlusion of a patient for occlusal reconstruction, so that mandibular incisors are aligned with maxillary incisors;
• the traction portion is configured for drawing an upper jaw for orthodontic remolding of jaw bones towards the outside of the mouth;
• and
• the plurality of shell-like bodies of the maxillary shell-like dental appliance are configured to gradually change a shape of an anterior area of the maxillary shell-like dental appliance, so that corresponding teeth are gradually aligned from an initial position to a target orthodontic position, and a height, measured from an occlusal line of the teeth, of the protrusion portion disposed on the maxillary shell-like dental appliance gradually decreases with the change of the shape of the anterior area of the maxillary shell-like dental appliance,
• wherein the mandibular positioning facial retrognathism orthodontic system further comprises a mandibular shell-like dental appliance, the mandibular shell-like dental appliance comprises a plurality of shell-like bodies each provided with a plurality of cavities for accommodating mandibular teeth, and the plurality of shell-like bodies of the mandibular shell-like dental appliance are configured to gradually change a shape of an anterior area of the mandibular shell-like dental appliance during orthodontic remolding of the jaw bones, so that corresponding teeth are gradually depressed from an initial position to a target orthodontic position,
• wherein the mandibular positioning facial retrognathism orthodontic system further comprises a first intermaxillary traction member disposed on one of the plurality of shell-like bodies of the maxillary shell-like dental appliance and a second intermaxillary traction member disposed on one of the plurality of shell-like bodies of the mandibular shell-like dental appliance, and after orthodontic remolding of the jaw bones, the first intermaxillary traction member and the second intermaxillary traction member are connected by an elastic member, so that an occlusal relationship between maxillary and mandibular teeth is adjusted,
• wherein the mandibular positioning facial retrognathism orthodontic system further comprises a first interactive traction member disposed on one of the plurality of shell-like bodies of the maxillary shell-like dental appliance and a second interactive traction member disposed on one of the plurality of shell-like bodies of the mandibular shell-like dental appliance, the first interactive traction member and the second interactive traction member are respectively disposed on a buccal side and a labial side of the upper and lower jaws, or are respectively disposed on a labial side or a buccal side of the upper and lower jaws, and after orthodontic remolding of the jaw bones and before adjusting the occlusal relationship between the maxillary and mandibular teeth, the first interactive traction member and the second interactive traction member are connected by an elastic member, so that posterior teeth are released from jaw opening.