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Natural compound can be used for 3-D printing of medical implants

Date:
October 23, 2013
Source:
North Carolina State University
Summary:
Biomedical engineering researchers have discovered that a naturally-occurring compound can be incorporated into three-dimensional printing processes to create medical implants out of non-toxic polymers. The compound is riboflavin, which is better known as vitamin B2.

The discovery enables researchers to create finely-detailed, biocompatible structures, such as this scaffold for tissue engineering.
Credit: Regen. Med. 8(6), 725–738 (2013).

Researchers from North Carolina State University, the University of North Carolina at Chapel Hill and Laser Zentrum Hannover have discovered that a naturally-occurring compound can be incorporated into three-dimensional (3-D) printing processes to create medical implants out of non-toxic polymers. The compound is riboflavin, which is better known as vitamin B2.

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"This opens the door to a much wider range of biocompatible implant materials, which can be used to develop customized implant designs using 3-D printing technology," says Dr. Roger Narayan, senior author of a paper describing the work and a professor in the joint biomedical engineering department at NC State and UNC-Chapel Hill.

The researchers in this study focused on a 3-D printing technique called two-photon polymerization, because this technique can be used to create small objects with detailed features -- such as scaffolds for tissue engineering, microneedles or other implantable drug-delivery devices.

Two-photon polymerization is a 3-D printing technique for making small-scale solid structures from many types of photoreactive liquid precursors. The liquid precursors contain chemicals that react to light, turning the liquid into a solid polymer. By exposing the liquid precursor to targeted amounts of light, the technique allows users to "print" 3-D objects.

Two-photon polymerization has its drawbacks, however. Most chemicals mixed into the precursors to make them photoreactive are also toxic, which could be problematic if the structures are used in a medical implant or are in direct contact with the body.

But now researchers have determined that riboflavin can be mixed with a precursor material to make it photoreactive. And riboflavin is both nontoxic and biocompatible -- it's a vitamin found in everything from asparagus to cottage cheese.


Story Source:

The above story is based on materials provided by North Carolina State University. Note: Materials may be edited for content and length.


Journal Reference:

  1. Alexander K Nguyen, Shaun D Gittard, Anastasia Koroleva, Sabrina Schlie, Arune Gaidukeviciute, Boris N Chichkov, Roger J Narayan. Two-photon polymerization of polyethylene glycol diacrylate scaffolds with riboflavin and triethanolamine used as a water-soluble photoinitiator. Regenerative Medicine, 2013; 8 (6): 725 DOI: 10.2217/rme.13.60

Cite This Page:

North Carolina State University. "Natural compound can be used for 3-D printing of medical implants." ScienceDaily. ScienceDaily, 23 October 2013. <www.sciencedaily.com/releases/2013/10/131023101326.htm>.
North Carolina State University. (2013, October 23). Natural compound can be used for 3-D printing of medical implants. ScienceDaily. Retrieved November 26, 2014 from www.sciencedaily.com/releases/2013/10/131023101326.htm
North Carolina State University. "Natural compound can be used for 3-D printing of medical implants." ScienceDaily. www.sciencedaily.com/releases/2013/10/131023101326.htm (accessed November 26, 2014).

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