Manufacturing method of personalized lingual orthodontic appliance

Abstract

The invention discloses a manufacturing method of a personalized lingual orthodontic appliance, which comprises the following steps: (1) taking a digital dental model of a patient, and arranging teethon the digital dental model to obtain a dentition model with an ideal normal dentition shape; (2) designing continuous and smooth strip-shaped wires according to the dentition shape of the dentitionmodel; (3) opening the die by using a die manufacturing process to manufacture a bracket body; (4) designing a personalized lingual bracket bottom plate model according to the position relationship between the bracket body and the lingual side surface of the tooth and the shape of the lingual side surface of the tooth; (5) welding the bracket body and the bracket bottom plate into an integral bracket; and (6) applying the bracket and the strip-shaped wire to clinical orthodontics. According to the invention, the bracket body is prepared by a mold process, the non-standard bracket bottom plateis prepared by a 3D printing technology, and then the bracket bottom plate and the bracket body are welded, so that the precision of the bracket groove, especially the right-angle part in the groove,is improved, an arch wire is convenient to install, the stress of teeth is close to an ideal state, and the teeth can be controlled to move in a three-dimensional direction.

Description

technical field [0001] The invention relates to the field of orthodontics, in particular to a method for manufacturing a personalized lingual orthodontic appliance. Background technique [0002] As orthodontic patients have higher and higher aesthetic requirements for aligners, invisible orthodontics have attracted more and more attention from orthodontists. For this reason, several invisible orthodontic techniques have emerged, such as ceramic brackets, transparent braces, and lingual appliances, but only the lingual appliance can be truly invisible and treat various malocclusions. appliance. In the past ten years, the advocates of lingual orthodontic technology have made lingual orthodontic technology a mature and efficient fixed orthodontic technology through a lot of clinical practice and exploration, and it is also a popular technology in the clinical field of orthodontics . However, the bonding accuracy of the lingual appliance, the bending accuracy of the arch wire...

AI Technical Summary

Problems solved by technology

[0004] The lingual appliance prepared by the above method has the following problems: (1) the direction of the bracket groove in the anterior tooth area and the posterior tooth area is different, especially at the junction of the anterior tooth area and the posterior tooth area, the direction of the groove changes. In addition, the arch wire is also bent here, which makes it difficult to install and place the arch wire, and the brackets often fall off during the installation or removal of the arch wire; (2) The commonly used lingual arch wire is mushroom-shaped The arch wire, between the canine and the first premolar is similar to a step curve. In clinical treatment, if the patient's anterior teeth have loose gaps, the length of the anterior segment of the subsequent arch wire is often insufficient and cannot be positioned; in addition, the anterior lingual side The anterior segment of the wire is a broken line, which is not similar to the arc of the labial side. Clinically, the arch wire cannot be placed in the designed position, or it may slide left and right after the position, resulting in abnormal tooth position; (3) The overall bracket It is produced by 3D printing technology and CAD / CAM integration, but due to technical problems and limitations of printing material performance, the dimensional accuracy of the groove is low, which has a great impact on the clinical treatment effect; (4) Due to the lack of space on the lingual side of the teeth, Due to the limitation of the vertical position of the bracket groove and the flat guide effect of the lingual bracket, the overposition of the anterior teeth in patients with lingual orthodontic treatment is too small, and the normal incision guide and canine guide cannot be formed

At the same time, since the traditional lingual archwire canines and first premolars already have a curvature, it is impossible to improve the anterior overburden by bending steps

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