Direct manufacturing method of customized lingual orthodontic retainer by selective laser melting

Abstract

The invention discloses a direct manufacturing method of a customized lingual orthodontic retainer by selective laser melting. The method comprises the following steps: measuring dentition data to obtain shape structure parameters of teeth, establishing a CAD model of teeth by reverse engineering, designing a CAD structure model for a single lingual retainer according to orthodontic requirement and teeth shape characteristics, guiding the model to a selective laser melting forming machine, and directly making a metal retainer body by a lamination manufacturing method; bending a wire of the retainer according to groove shape of the retainer, welding the wire with the groove by a laser welding method. The method for manufacturing the orthodontic retainer by direct selective laser melting forming can realize customized production according to individual requirements, the obtained retainer is matched with the teeth shape and has high precision without deformation, and suitable for long-term use, has thin thickness, short manufacturing cycle; and direct forming of the retainer saves procedures, time and cost, so the method has wide application scope.

Description

technical field [0001] The invention relates to a manufacturing technology of an orthodontic retainer for correcting teeth, in particular to a method for direct manufacturing of a customized lingual orthodontic retainer by selective laser melting. Background technique [0002] In order to align the irregular teeth, orthodontic technology is widely used in clinical applications. [0003] All patients after orthodontic treatment need to wear a retainer to consolidate the treatment effect. It is an indispensable and important part of the orthodontic process. Maintenance is the most effective measure to prevent the recurrence of deformity. The commonly used retainers at this stage can be divided into movable Retainers and Fixed Retainers. Some patients are unwilling to wear the movable retainer because it hinders oral functions such as chewing and pronunciation, resulting in recurrence of deformity. Fixed retainers can overcome the influence of patient cooperation factors, and...

AI Technical Summary

Problems solved by technology

If the curvature of the tooth surface changes greatly, more adhesives are required, causing the base plate of the retainer to be far away from the tooth surface, making the patient feel uncomfortable and easy to loosen, which ultimately affects the retention effect

The other is an adhesive retainer made of twisted silk, but the clinical operation of this type of retainer is cumbersome, and the chair-side working hours are long, and there are even disadvantages such as retainer loosening and retention failure.

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