Multi-directional arch expanding device

Abstract

The invention relates to a multi-directional arch expanding device which comprises a plastic base plate coincident with a cavity of the palate of a patient, spiral opening devices, first premolar metal retention union crowns on the left side / right side, second premolar metal retention union crowns on the left side / right side, first molar metal retention single crowns on the left side / right side and arch wires. The plastic base plate is divided into premolar area base plate bodies on the left side / right side and molar area base plate bodies on the left side / right side, the premolar area base plate body on the left side is connected with the molar area base plate body on the left side through the spiral opening devices, the premolar area base plate body on the right side is connected with the molar area base plate body on the right side through the spiral opening devices, the premolar area base plate body on the left side is connected with the premolar area base plate body on the right side through the spiral opening devices, and the arch wires are placed in MBT brackets of the first premolar metal retention union crowns on the left side / right side and the second premolar metal retention union crowns on the left side / right side and MBT cheek tubes of the first molar metal retention single crowns. The multi-directional arch expanding device has the advantages that bony structures of all teeth and the anterior palate part before the premolars on the two sides provide a strong support for distal movement of premolars; the metal crowns well control the vertical directions and the horizontal directions of the back teeth, tooth extending, lowering or twisting possibly occurring in distal movement is avoided.

Description

technical field [0001] The invention relates to a dental technology, in particular to a multidirectional arch expander. Background technique [0002] The ideal occlusion of the molars is a neutral relationship, that is, the mesiobuccal cusp of the maxillary first molar occludes the buccal groove of the mandibular first molar. Angle's class II malocclusion is manifested when the buccal groove of the mandibular first molar is located in the mesiobuccal apex-distal of the maxillary first molar, also known as the molar-distal relationship. This type of patients is also accompanied by symptoms of crowding of the upper anterior teeth and narrowing of the maxillary dental arch. The incidence of Angle’s Class II malocclusion is about 30% among Chinese people, which has a great impact on the patient’s face, mental health, and masticatory function. , the clinical visit rate is quite high. For the treatment of patients with Angle's Class II malocclusion with moderate to severe crowdi...

AI Technical Summary

Problems solved by technology

In the existing technology, most of the appliances only stay in the horizontal expansion of the dental arch, and do not have the function of moving the maxillary posterior teeth distally, so it is difficult to achieve the ideal occlusal relationship in the correction of this type of patients

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