POROUS DENTAL IMPLANT CAPABLE OF DEGRADING SO AS TO RELEASE MAGNESIUM IONS

摘要

A porous dental implant capable of degrading so as to release magnesium ions, comprising an implant base (1) printed with SLM technology from a pure titanium material. A porous structure is provided inside of the planting base (1), and spherical holes (a2) or thread grooves (b2) are provided on the surface of the planting base (1). The spherical holes (a2) or the thread grooves (b2) are filled with degradable layers (a3, b3), and the degradable layers (a3, b3) are formed by means of instantaneous melt adhesion of magnesium particles. The degradable layers (a3, b3) inlaid in the surface of the porous dental implant are melted by means of laser heating to achieve adhesion, and can cover the rough surface of the pure titanium implant base printed by SLM, and thus the processing requirements of SLM printing are reduced. The elastic modulus and yield strength of the degradable layers (a3, b3) are close to those of the bone tissue, so that the porous dental implant will not suffer from stress shielding during the early stage of planting, and magnesium ions contained in the degradable layers (a3, b3) can promote cell growth and accelerate the bone binding process.