Design method and preparation method of shell-shaped tooth appliance

Abstract

The invention relates to a design method and a preparation method of a shell-shaped tooth appliance. The design method comprises the steps of: acquiring digital dental models; designing a shell-shapedtooth appliance body; and arranging a tongue body correction body. After the shell-shaped tooth appliance obtained by the method is worn on teeth, bad habits of a tongue body can be improved. The preparation method comprises the steps of: on the basis of the designed shell-shaped tooth appliance, carrying out 3D printing by a series of corresponding digital dental models which enable teeth to begradually changed to target positions from initial positions; then obtaining a shell-shaped dental instrument comprising a tooth shape in a hot-press forming mode on an entity dental model; and then cutting on the shell-shaped dental instrument comprising the tooth shape along a gingiva line or at the position adjacent to the gingiva line to obtain the shell-shaped tooth appliance capable of accommodating the teeth or directly carrying out preparation of the shell-shaped tooth appliance in a 3D printing mode.

Description

technical field [0001] The invention belongs to the field of medical devices, and relates to a design method and a preparation method of a shell-shaped dental appliance. Background technique [0002] Bad oral habits are one of the most common causes of malocclusion. According to the statistics of Beijing Medical University, they account for about 1 / 4 of the causes of various malocclusions. They are harmful and abnormal habits that occur in the oral environment. Oral bad habits as external stimuli, inhibit or strengthen the function of a certain part of the mouth and jaw, or produce a direct force on the part, so that the normal balance of biological forces is destroyed, thereby hindering the normal development of children's oral soft and hard tissues, causing tooth decay. Arch and alveolar bone morphology changes. Orthodontic correction measures must be taken to adjust oral muscle function for long-term bad oral habits that cause malocclusion. [0003] The normal tongue is...

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Problems solved by technology

[0004] In the process of orthodontic treatment, in order to get rid of bad tongue habits, the commonly used method in fixed orthodontics is the installation of fixed tongue spines. The tongue spines are welded to the metal belt ring and glued to the upper and lower incisors, and extend to the lower The lingual mucosa of the anterior teeth, while the position of the tongue thorn of the existing invisible appliance is the position corresponding to the lingual side of the lower anterior teeth and the crown. There is still a certain space between the tongue thorn and the sublingual area at this position, and some patients After wearing it, the tongue will be placed under these tongue spines in order to obtain a comfortable position. In this way, the appliance will lose the effect of correcting bad tongue habits, and even aggravate bad habits. In addition, this method has certain safety hazards. If the welding is not firm, it is easy to be swallowed after falling off, causing unexpected damage to the patient

[0005] In the field of invisible orthodontics, there is no effective structure for improving tongue habits. Therefore, it is important to study a design method and preparation method of a dental instrument that cooperates with invisible orthodontics to achieve tongue orthodontics.

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