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Louisiana Tech University researchers use 3D printers to create custom medical implants
Date:8/21/2014

lson, associate professor of electrical and nanosystems engineering, to develop the technology in collaboration with Mills. The group also worked with Extrusionbot, LLC of Phoenix, Arizona, who provided important materials support throughout the development and testing process.

"We had been working on several applications of 3D printing," said Mills. "Several students in my lab including Jeff and Connor, who was a guest researcher from Dr. Wilson's lab, had been working with colleagues for some time. I sent an email to them and asked them the question, 'Do you think it would be possible to print antibiotic beads using some kind of PMMA or other absorbable material?'"

From that point, the technology evolved and has become a highly innovative approach to overcoming many of the limitations encountered in current drug delivery systems. Most of today's antibiotic implants, or "beads," are made out of bone cements which have to be hand-mixed by a surgeon during a surgical procedure and contain toxic carcinogenic substances. These beads, which are actually a type of Plexiglas, do not break down in the body and require additional surgery for removal. Weisman and his team's custom 3D print filaments can be made of bioplastics which can be resorbed by the body to avoid the need for additional surgery.

The nature of the 3D printing process developed at Louisiana Tech allows for the creation of partially hollow beads that provide for a greater surface area and increased drug delivery and control. Localized treatment with the 3D printed antibiotic beads also avoids large systemic drug dosages that are toxic and can cause damage to a patient's liver and kidneys.

"Currently, embedding of additives in plastic requires industrial-scale facilities to ensure proper dispersion throughout the extruded plastic," explains Mills. "Our method enables dispersion on a tabletop scale, allowing researchers to easily customize additives to the desire
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Contact: Dave Guerin
dguerin@latech.edu
318-257-4854
Louisiana Tech University
Source:Eurekalert  

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