A composite material for artificial teeth and its preparation method and application

Abstract

The invention discloses a composite material for artificial teeth and a selective laser sinter molding method and an application thereof. The method includes raw materials, a powder preparation method and a material molding method. The raw materials contain polymethyl methacrylate, hydroxyapatite nano-particles, an emulsifier, microcrystalline wax and paraffin. The powder preparation method comprises the following steps: firstly carrying out lipophilic modification on the hydroxyapatite nano-particles by a wax emulsification method and then preparing a polymethacrylate powder material doped with the hydroxyapatite nano-particles by hot-melting mechanical agitation and crushing ball milling. According to the molding method, a polymethacrylate powder is molded by a selective laser sintering technology. By the adoption of the artificial teeth dedicated composite material with a composite bioactivity, the problem that traditional artificial teeth have insufficient mechanical strength and poor compatibility can be solved effectively. In addition, as the selective laser sinter molding technology is provided, preparation time of artificial teeth is shortened greatly, teeth replacement cycle is minimized for patients, and requirements of doctors and patients on artificial teeth are met.

Description

technical field [0001] The invention relates to a composite material for artificial teeth and its preparation method and use, in particular to a composite material for artificial teeth and its selective laser sintering preparation method and use. Background technique [0002] At present, the most clinically used artificial tooth material is polymethyl methacrylate, which is favored by doctors and doctors because of its advantages of corrosion resistance, strong resistance to fragmentation, strong designability, low cost, and durability. Patients welcome. However, due to the large difference in composition and structure with human bone tissue, the bone tissue repair process after implantation in the gums is basically a passive "filling" process, and the biocompatibility of the material is poor, making it difficult to achieve a real " "Biological fusion", even non-healing or loosening after implantation, and the mechanical properties of polymethyl methacrylate are also poor, ...

AI Technical Summary

Problems solved by technology

However, due to the large differences in composition and structure with human bone tissue, the bone tissue repair process after implantation in the gums is basically a passive "filling" process, and the biocompatibility of the material is poor, making it difficult to achieve true "filling". "Biological fusion", even non-healing or loosening after implantation, and the mechanical properties of polymethyl methacrylate are also poor, making artificial tooth bases easy to crack, which seriously restricts the promotion of polymethyl methacrylate in dental clinics application

[0003] In addition, traditional dental implant technology is a complicated operation that requires a sterile environment in the operating room. After the tooth is extracted, the patient has to wait 3 months for the alveolar bone to heal before implanting a vertebral columnar bone on the alveolar bone. Alloy, that is, threaded nails, to replace the roots of the original real teeth, and wait for another 2 to 3 months before installing a false crown on the threaded screws. Once there is a gap between the artificial crown and the alloy root, bacteria will easily enter the human body , causing discomfort to the patient, and the whole process took about half a year, during which the patient had to come to the hospital three or four times