| 摘要 |
<p>A preparation method for a medical porous metal implant material comprising mixing tantalum powder, a pore-forming agent, and a forming agent into a powder mixture, then granulating, injecting into a mold for forming, demolding, degreasing, sintering, and performing a heating process to produce the medical porous metal implant material for dental bone tissue replacement; the pore-forming agent is one or multiple of sodium bicarbonate, urea, sodium chloride, methyl cellulose, and ethyl cellulose, and the forming agent is one or multiple of polyvinyl alcohol, stearic acid, zinc stearate, paraffin, and synthetic rubber; the degreasing process comprises: gradually increasing the temperature to 400 to 800°C at a speed of 0.5 to 3°C/min, introducing argon gas to form a protective atmosphere, and maintaining the temperature for 60 to 240 minutes; Effective improvements to the sintering and heating process steps substantially enhance the mechanic properties of the produced porous tantalum material, thereby enabling the material to be very suitable as a medical implant material for human dental bone tissue replacement.</p> |
