Human implants based on tantalum have been widely used in osteosurgery, craniofacial surgery and dentistry, showing excellent biocompatibility and safety. However, due to the disadvantages of dense tantalum, such as its heavy ratio and high elastic modulus, the effect of direct implantation in human body is not good. Therefore, people begin to develop porous tantalum. The basic structure of porous tantalum metal makes it have the characteristics of high overall volume porosity, high surface friction coefficient and low elastic modulus, which makes porous tantalum a new material with good development prospect in the clinical application field of orthopedics.
Tantalum metal is used as material, and a new type of porous tantalum artificial bone is developed, which will not degrade, form a separation interface with bone tissue, or cause inflammatory reactions with surrounding tissues or become loose due to corrosion and dissolution of surrounding tissues. Its porous nature also allows the host's bone tissue to regenerate in three dimensions in the pores of the artificial bone, becoming a "living reinforced concrete reconstituted bone".
Multilevel porous tantalum material compared with single-stage porous tantalum material, physical properties have changed, with a sponge "wetting behavior", this feature can be guided bone tissue through body fluids into the artificial bone porosity, and in the growth and development of artificial bone into reinforced concrete type of reengineering "living bone", disruptive to develop with bone support, performance of long bone regeneration and bone fusion and bone mass loss of large segmental bone injury repair material.
