Demolding method of clear aligners without brackets

Abstract

The invention discloses a demolding method for a bracket-free invisible appliance. The demolding method comprises the following steps: establishing a three-dimensional digital model of an oral cavity of a patient, and designing a correction scheme; designing pairwise demolding holes in the surface of a jaw three-dimensional model along a gingiva line; making a pair of demolding forceps, bending two steel wires respectively to form forceps jaws, forceps cheeks and handles, and hinging the two steel wires at a joint between the forceps cheeks and the handles, wherein the forceps jaws are a pair of inwardly-hooked filaments, and are in clearance fit with the demolding holes; molding a jaw entity model, and fixing the jaw entity model to a fixture; making a high-molecular membrane adsorb on the jaw entity model, and removing the residual membrane by cutting along the gingiva line; inserting the two forceps jaws of the demolding forceps into the pair of demolding holes respectively, and pulling the demolding forceps towards a direction far away from the jaw entity model till the membrane is loosened out of the jaw entity model after the two forceps jaws respectively hook the appliance membrane on respective sides. The demolding method has the advantages of no need of manually peeling the membrane during demolding by a worker, uniform demolding force, and increase of the demolding efficiency.

Description

technical field [0001] The invention relates to a method for demolding the diaphragm of the invisible aligner from the jaw model when making the invisible aligner without brackets. Background technique [0002] Bracketless invisible aligner is a kind of transparent elastic material movable orthodontic device designed and manufactured by computer aid. It is a series of continuous orthodontic devices, and the purpose of orthodontics is achieved by continuously moving teeth in a small range. [0003] Chinese patent application 201410482539.5 discloses a manufacturing method of a bracketless invisible aligner, including: 1. Obtaining the oral data of the patient, and establishing a three-dimensional model of the patient's oral cavity based on the oral data. The three-dimensional model includes tooth data and gingiva data; 2. Design the orthodontic plan, adjust the position of the teeth to be corrected to the target orthodontic position, and obtain the dental model; generate cutt...

AI Technical Summary

Problems solved by technology

[0005] At present, in the demoulding process, since the polymer membrane is adsorbed on the solid jaw model, and the thickness of the membrane is only 0.5mm to 0.75mm, it is time-consuming for workers to peel off the membrane from the jaw model with fingers It is strenuous and often breaks the appliance or mold due to excessive force or uneven application of force

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