A kind of manufacturing method of personalized lip-lingual orthodontic appliance

Abstract

The invention provides a manufacturing method for an individualized lip and tongue side orthodontic appliance. According to the manufacturing method, the individualized lip and tongue side orthodontic appliance is manufactured according to a lip and tongue side shape of teeth of a patient; a manufactured bracket is divided into two parts; one part is a bracket body of the bracket; the other part of the bracket is an individualized bracket bottom plate of the bracket. The bracket body of the bracket in the orthodontic appliance contains three-dimensional data (whole tooth axis inclined degree, whole tooth torque and whole tooth convexity) of countryman normal whole teeth (dental crowns and tooth roots) reference values. Meanwhile, the designed bracket bottom plate is completely fitted with a lip and tongue side face of the teeth and the bonding strength of the bottom plate and the lip and tongue side face is enhanced. According to the manufacturing method, the whole teeth can be moved to one accurate position to realize the controllable quantitative movement of the whole position of the teeth; the tooth roots are placed on an ideal position; the requirements of special crowd are met and the reoccurrence after the correction is reduced; the occurrence rate of complications including bone exposure, bone fracture and the like is avoided, and the balance and the stability of the orthodontic effect is realized.

Description

technical field [0001] The invention relates to a manufacturing method of a personalized lip-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 appeared, such as ceramic brackets, Invisalign appliances, lingual appliances, etc., but only the lingual appliance is truly invisible and can 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 accuracy of the bonding of the lingual appliance, the bending accuracy of the arch wire, and the manufacturing accu...

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Problems solved by technology

However, the accuracy of the bonding of the lingual appliance, the bending accuracy of the arch wire, and the manufacturing accuracy of the labial and lingual appliance will directly affect the effect of the treatment.

[0003] In the 1970s, Fujita and Kurz invented the lingual appliance: a specially designed bracket was bonded to the lingual side of the tooth for orthodontic treatment. In order to compensate for the huge anatomical variation of the lingual surface of the tooth, the lingual Adhesives are used to fill the gap between the tooth surface and the bracket, so as to achieve the linearization of the lingual bracket groove, which greatly increases the thickness of the bottom of the bracket and seriously affects the comfort of the patient.

Although it was all the rage in the 1980s, it was quickly abandoned by most clinicians due to its complicated operation and the difficulty of accurately controlling tooth movement.

In 2001, Wiechmann in Germany carried out simulated tooth arrangement and personalized bracket design on the digital crown model to realize personalized orthodontic treatment, reduce the thickness of the bracket, and improve the comfort of the patient. But the system doesn't take into account information about the location of the tooth roots

However, the research results failed to achieve the measurement of tooth torque and inclination defined by Andrews.

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