Research On Structure Design And Bone 3D Reconstruction Of 3D Printer Oriented To Artificial Bone

With the rapid development of medical and industrial fields,there is an urgent need for the advancement and efficiency of medical operation.In the field of artificial bone medical research,the combination of bone three-dimensional reconstruction and 3D printer technology is of great importance to the preparation of artificial bone.The use of artificial bone has two aspects.One is to prepare the human skeleton model for clinical research,and the other is that the patients like comminuted fracture can not be fixed by conventional surgical methods.Under the condition of fixed fracture site,the bone of the fracture site is reorganized and reorganized by three-dimensional reconstruction,and a relatively complete size fracture block is set up.Artificial bone is made in the form of 3D printing to be used in the operation of fracture patients to help the fracture patients recover the ability of action.This article mainly designs a new type of FDM artificial bone 3D printer,and studies the bone3 D reconstruction method.In order to meet the requirement of making artificial bone in printing,the overall design scheme of mechanical structure of artificial bone 3D printer based on the principle of molten deposition is proposed.In order to improve the processing difficulty,compact structure and lower economic cost,the printer's executive mechanism is selected as the starting point.The effect of the processing and assembly errors of the hybrid mechanism is designed.The design of the printer is designed on the basis of the size relation,based on the size relation,and the Delta mechanism and the subsidiary body are designed.The inverse kinematics of the Delta mechanism is deduced and the motion space simulation of the end of the actuator is simulated.The reachable space at the end of the printer actuator is determined,the selection of the components of the printer device is completed and the control system is designed.The feasibility of 3D reconstruction through CT images is analyzed.The 3D reconstruction of human skeleton is carried out based on CT images.The visual observation and analysis of the bone model are carried out before the reconstruction of the skeleton model through the way of body rendering,and the CT pictures are pretreated.Finally,the skeleton model of artificial bone which can be used for artificial bone 3D printers is reconstructed.The method of separating the target skeleton was studied,and the most effective method of separating the target skeleton was selected by comparison and observation.The experimental method was designed to repair the missing parts of the bone pixels in the hidden area of the target skeleton and improve the beauty of the model.The patients with comminuted fracture need the virtual fracture.The problem of reduction,using the common fracture reduction method to reset the reduction,put forward a new efficient method for fracture reduction,and compare the two kinds of fracture,finally determine the most suitable fracture reduction method,accurately get the bone model in the patient's health condition,and save it as the file format suitable for 3D printing.