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Czech researchers at the University of Chemistry and Technology in Prague are pioneering a new approach to joint replacement surgery with titanium implants designed to gradually release medication post-operatively. This innovative project, developed in collaboration with surgeons from Motol University Hospital, aims to address the critical issue of post-operative infections, a common complication following joint replacement procedures.
The titanium implants are crafted using advanced laser powder bed fusion technology. This method involves spreading a thin layer of titanium powder, which is then fused into shape by a laser. The intricate process is repeated approximately 1,300 times for a single knee implant, resulting in a complete print that takes about ten and a half hours. The precision of the machine allows researchers to replicate the microscopic architecture of natural bone, which is essential for effective integration with the body.
The porous internal structure of the implants is a significant feature, mimicking the natural porosity of bone tissue. This design not only facilitates better bonding with surrounding bone but also serves as a reservoir for medication. Current tests involve a version of the implant that incorporates a carrier of sulfates, phosphates, and silver, combined with the antibiotic vancomycin to combat infections.
Despite the promising capabilities of these implants, the research team faces challenges, particularly in identifying a suitable carrier material that is safe for the body and can release medication at a controlled rate. The goal is to ensure that the antibiotics are delivered gradually rather than in a single dose.
The development of these titanium joint implants represents a significant advancement in orthopedic surgery, potentially improving patient outcomes by reducing the risk of post-operative infections. The team has successfully demonstrated similar implants for hip, shoulder, and ankle replacements, marking a step forward in the field of medical technology.
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