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Home Science News Technology and Engineering

New treatment method using plasma irradiation promotes faster bone healing

April 16, 2024
in Technology and Engineering
Reading Time: 3 mins read
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Effect of plasma irradiation on broken bone
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“Break a leg!” is a welcome blessing of good luck, but who wants to hear that they have actually broken a bone? What’s worse, fractures that are displaced or complex require surgery and possibly lengthy recovery times while the patient remains partly or wholly immobilized.

Effect of plasma irradiation on broken bone

Credit: Osaka Metropolitan University

“Break a leg!” is a welcome blessing of good luck, but who wants to hear that they have actually broken a bone? What’s worse, fractures that are displaced or complex require surgery and possibly lengthy recovery times while the patient remains partly or wholly immobilized.

Aiming to shorten recovery times, an Osaka Metropolitan University-led research group is focusing on plasma irradiation as a treatment method to speed up bone healing.

The Department of Orthopedic Surgery’s Kosuke Saito, a graduate student in the Graduate School of Medicine, Associate Professor Hiromitsu Toyoda, and Professor Hiroaki Nakamura, and Graduate School of Engineering Professor Jun-Seok Oh were among the researchers who used laboratory rats for their experiment.

The researchers broke the legs of the rats in two ways. One group of 24 rats had normal fractures that are generally easy to heal. The other group of 20 rats had fractures known as non-union ones where healing is usually prolonged or does not happen. Some were then irradiated with non-thermal atmospheric-pressure plasma, which didn’t offer the normal fracture group any significant advantages but boosted the healing and recovery time of the rats with non-union fractures. The strength of the healed areas of the irradiated non-union rats was also about 3.5 times stronger than that of the nonirradiated ones.

Furthermore, in vitro study of pre-osteoblastic cells irradiated with the plasma for 5 to 15 seconds showed that the activity of a protein that is an indicator of osteoblast differentiation increased, indicating that maturation of these bone-forming cells was progressing.

“Collaboration between the medical and engineering fields creates new medical technologies that have never before existed,” Professor Toyoda declared. “In the future, combining this treatment method with current fracture treatments is expected to contribute to more reliable bone fusion and shorter recovery times.”

Their findings are set for publication in PLOS ONE on April 16, 2024.

###

About OMU 

Established in Osaka as one of the largest public universities in Japan, Osaka Metropolitan University is committed to shaping the future of society through “Convergence of Knowledge” and the promotion of world-class research. For more research news, visit and follow us on social media: X, Facebook, Instagram, LinkedIn.



Journal

PLoS ONE

DOI

10.1371/journal.pone.0298086

Method of Research

Experimental study

Subject of Research

Animals

Article Title

Fracture healing on non-union fracture model promoted by non-thermal atmospheric-pressure plasma

Article Publication Date

16-Apr-2024

COI Statement

The authors have declared that no competing interests exist.

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