Degradable magnesium mesh for 3D printing personalized alveolar bone defect reconstruction

Abstract

The invention discloses a degradable magnesium mesh for 3D printing personalized alveolar bone defect reconstruction. According to the magnesium mesh, a personalized model structure is designed according to CT data, high-precision preparation of the magnesium mesh is achieved through the 3D printing technology, and the magnesium mesh is made to be tightly attached to the anatomical appearance of the alveolar bone; the defects that a traditional titanium mesh needs to be bent in an operation and the postoperative exposure rate is high are overcome, the operation difficulty and time are reduced, and the operation success rate is increased. The surface of the magnesium mesh is of a completely-perforated regular hexagon structure, and the mesh structure has the advantages of self-supporting, easiness in forming, high printing precision, good mechanical property and the like. Meanwhile, by combining the degradability of a magnesium material and the advantage of promoting osteogenesis through bone induction of magnesium ions, the problems that a titanium mesh shields stress and cannot be degraded, and secondary operation is needed for taking out the titanium mesh during tooth implantation are solved. The preparation process is simple, the preparation period is short, raw material loss is small, repeatability is high, pollution is avoided, and the prepared magnesium mesh has the advantages of being controllable in appearance and high in precision and can serve as a new generation of oral cavity alveolar bone large-area bone defect repairing support.

Description

technical field [0001] The invention belongs to the technical field of preparation of biomedical materials, and relates to a degradable magnesium mesh for reconstruction of individualized alveolar bone defects using 3D printing; especially relates to a self-supporting, easy-to-shape, high-printing accuracy and Personalized degradable magnesium mesh for alveolar bone defect reconstruction with good mechanical properties. Background technique [0002] For clinical dentistry, the treatment of large jaw defects has always been a difficult problem for dental implantologists. Insufficient bone mass at the implant site affects the indications for implant treatment, implant quality, functional load, implant aesthetics, and effective survival time of the implant in the oral cavity. Therefore, it is necessary to increase the bone height and bone width of the bone defect by means of bone regeneration. Commonly used bone augmentation techniques include autologous bone grafting, distra...

AI Technical Summary

Problems solved by technology

[0005] However, due to the characteristics of flammability and oxidation of magnesium alloys, there will be a greater safety risk in the 3D printing of magnesium alloys. At the same time, magnesium alloys also have the characteristics of low boiling point and high vapor pressure, which will lead to serious damage during the 3D printing process. Powder splashing, coupled with the limitation of the preparation accuracy of 3D printing, makes the surface mesh of the prepared magnesium mesh often distorted or blocked. These defects seriously damage the mechanical properties of the magnesium mesh and easily cause local corrosion and affect the degradation performance of the magnesium mesh. , so the application of 3D printed magnesium mesh in alveolar bone defect reconstruction is severely restricted

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