Process Optimization And Performance Of New Dental Implants Based On 3D Printing

With the aggravation of aging society,more and more people need to repair their oral teeth,and the improvement of material living standard makes more and more patients with dentition loss choose dental implant to repair their teeth.Compared with traditional fixed partial denture repair and removable partial denture repair,dental implant repair is more natural and beautiful,and can be used for mastication like real teeth.Long-term use will not cause alveolar bone absorption.Dental implant restoration involves stomatology,mechanical engineering,computer science and other disciplines,which is a multidisciplinary biomedical engineering problem.Due to the lack of experience in the field of stomatology in in-depth study of related knowledge in the field of mechanical engineering,and the limitations of traditional machining and manufacturing methods,the implant structure in the market is single.The traditional implant is a single structure,so it can only meet one kind of performance requirements,and cannot achieve good comprehensive performance after implantation.At the same time,for implants processed by selective laser melting,the molding quality is limited due to early data processing and other factors.In this paper,the characteristics of complex structures can be created by selective laser melting technology,and the new structural design,processing optimization and performance research of implants are studied in depth in combination with relevant theories of oral implant science.The main research contents of this paper include the following aspects:(1)The concept of structural splicing was introduced into the implant structure design based on the relevant theories of oral implant science,in order to achieve the performance splicing through structural splicing;On the basis of retaining v-shaped thread,a new structural implant with more uniform stress distribution and better stability was obtained by splicing the reverse support thread and porous structure,then it will be processed and prepared.(2)Analyze the processing structure characteristics of the reverse support thread-porous implant,optimize the data processing at the early stage of processing,quantify the molding quality,and obtain the optimization model of the overall volume error regarding the molding direction and lamination thickness;The quality model of implant processing was solved based on single objective optimization of genetic algorithm.(3)Simulate implantation of implants and skulls,intercept and built the model,and set them to the state at the later stage of implantation;The equivalent stress distribution of the new implant and the conventional v-shaped implant was obtained by finite element analysis,the results are analyzed from the biological stress compatibility and later stability.(4)The implant was combined with alveolar bone to establish a solid model;The oral environment was simulated,and the solid model was put into the environmental model to measure the initial stability of the new implant.The fatigue specimens were assembled according to the requirements of 14801 standard,and the mechanical properties of the fatigue life of the new 3d-printed pure titanium implant model were tested.In this paper,the idea of structural splicing is used to design a new type of one-stage implant,and performance splicing can be realized through performance research.The optimal forming direction and lamination thickness were obtained by single objective optimization of the quality of the new implant by genetic algorithm.