Method for producing immediate complete or half denture based on 3D printing technique

Abstract

The invention discloses a method for producing an immediate complete or half denture based on a 3D printing technique. The method comprises the steps of preparing an impression with a remaining tooth jaw or a tooth-free jaw, transferring a jaw position relation, acquiring digital models of the remaining tooth jaw or the tooth-free jaw and the jaw position relation, setting the arrangement and the denture border of artificial teeth of the immediate complete or half denture corresponding to the form of the remaining tooth jaw or the tooth-free jaw and the jaw position relation, invoking data in a preset database, designing the artificial teeth and polishing surfaces of the artificial teeth, regulating the occlusion of the teeth to enable alveolar ridge supporting tissues to bear proper pressure distribution, and manufacturing a three-dimensional model of the immediate complete or half denture by virtue of a photo-healing three-dimensional printing technique in the 3D printing technique. The method has the advantages that the production steps are simple, the production time is short, the precision is high, the denture can be conformably worn by a patient, and meanwhile, the production cost is lowered.

Description

Technical field [0001] The invention relates to a method for manufacturing an immediate full denture or a half denture based on 3D printing technology, and belongs to the field of oral materials. Background technique [0002] According to the applicant’s understanding, traditional denture restoration requires that the extraction wound is healed and the alveolar ridge absorption tends to stabilize. Patients usually have to wait about 3 months after extraction. Long-term loss of dentition affects the patient’s psychological state and facial appearance. And chewing and swallowing function, pronunciation, etc. have a huge impact. The patient is eager to restore the dentition as soon as possible and shorten the time of missing teeth as much as possible. Therefore, it is necessary to wear immediate full dentures or half dentures to patients as soon as possible after tooth extraction, to meet the needs of patients, to allow patients to avoid the extraction period, to restore the physio...

AI Technical Summary

Problems solved by technology

[0004] Traditional immediate complete dentures or partial dentures are mostly made of Polymethyl Methacrylate (PMMA) by thermal coagulation filling process. The production process needs to go through steps such as boxing, filling, pressurization, and water bath polymerization. cumbersome, time-consuming

Moreover, in the production process of traditional thermal coagulation filling process of complete dentures or partial dentures, it is often difficult to accurately control the ratio of polymethyl methacrylate powder and liquid due to the deformation of the base wax pattern and the difficulty of pressing the mold box on the press. Uniformity, heating speed and holding time during heat treatment are not easy to accurately grasp and control and other factors, resulting in cracks in the plaster model, or defects such as deformation or bubbles in the finished denture base

Moreover, the heat-curing base resin will shrink to a certain extent after polymerization. If the shrinkage is too large, the suitability between the denture base tissue surface and the oral mucosa surface will be poor, which will affect the retention.

In addition, the traditional full or partial dentures are arranged by technicians, which takes a long time, and the quality of the teeth arrangement is closely related to the technical level of the technicians, and quality deviations are prone to occur.

Moreover, immediate dentures are different from conventional denture restorations, which require multiple teeth to be extracted at one time. Therefore, it is difficult to make accurate model trimming before tooth extraction, which will directly affect the stability and retention of the restoration, resulting in many visits to the doctor and involving many times. repair

[0005] In addition, because the alveolar bone is unstable and will continue to absorb within 3 months after tooth extraction, it is easy to have symptoms such as loosening, non-tightness, and poor retention after wearing a full or partial denture for a period of time, and it is necessary to remake the temporary complete or partial dentures, and remaking takes a considerable amount of time, causing inconvenience to patients

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