Manufacturing method of positioning tray and bracket with positioning hook used for manufacturing positioning tray

Abstract

The invention discloses a manufacturing method of a positioning tray and a bracket with a positioning hook, which is used for manufacturing the positioning tray. The manufacturing method of the positioning tray comprises the following steps: obtaining an original dental impression and an ideal dental impression; converting the ideal dental impression to a three-dimensional digital model, drawing each bracket main body; drawing the positioning hook on each bracket main body; using a wax pattern machine to prepare the wax pattern of each bracket with the positioning hook; using the wax pattern as the mould core to cast the blank of the bracket with the positioning hook and perform surface treatment; assembling the treated bracket with the positioning hook on the original dental impression, pressing a film to obtain the positioning tray; and finally removing the positioning hook to obtain the bracket matched with the positioning tray. The bracket with the positioning hook is prepared for applying the method. The method of the invention is not required to prepare the integral mould of the bracket and the dental impression, thus greatly reducing the production cost; and the finished appliance can be prepared after the positioning hook is cut off without casting the bracket separately, thus saving the cost and shortening the production period.

Description

technical field [0001] The invention relates to a method for manufacturing a positioning tray of an individualized orthodontic appliance in stomatology and a bracket with a positioning hook for manufacturing the positioning tray. Background technique [0002] At present, more and more patients choose individualized orthodontic appliances as orthodontic treatment equipment. Individualized orthodontic appliances are generally composed of brackets, arch wires, elastic pressure rings and resin fillings that match different lingual tooth surfaces. Each bracket is designed one by one according to the actual tooth shape of the patient. One side of the bracket is close to the patient's lingual tooth surface, and the other side is provided with a groove. The arch wire passes through the groove to connect each bracket, and the two are relatively fixed with an elastic pressure ring, and then Different amounts of resin fillings will be injected between the brackets, arch wires and toot...

AI Technical Summary

Problems solved by technology

There are two ways to manufacture positioning trays. One is to manually place the brackets on the original dental mold and press the positioning tray after obtaining the original dental mold of the patient. This method is suitable for the tooth surfaces with high curvature such as incisors and molars , it is relatively easy to find the exact fitting position of the tooth surface, but it is difficult to manually find a suitable fitting position for the smooth tooth surface with low curvature of the canine; another method is to use the computer to draw the original The 3D digital model of the dental model and the aligner is accurately matched, and then the model is manufactured as a whole, and then the overall model is used for lamination to manufacture a positioning tray, and then relying on the 3D digital model of the aligner, another production is made. Finished appliance

This method is costly and the manufacturing cycle is long

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