Now in our 13th year of bringing you beautiful imagery from biomedical science every day

Search the archive of over 4000 images

Breaking Bones

Gum disease bacterium implicated in impairing bone regeneration after injury

06 February 2020

Breaking Bones

Sore gums and painful chewing are signs P. gingivalis has got the better of you. This bacterium is the main culprit in gum disease, which is a risk factor for another disease, rheumatoid arthritis (RA). Patients with RA are prone to fractures and these take longer to heal as their bone struggles to regenerate. Researchers now investigate whether P. gingivalis further impairs bone regeneration in RA using a mouse model of the disease. The leg bones of normal and RA mice were damaged; half were orally infected with P. gingivalis. Leg bone density, as a reflection of bone regeneration, was measured using microCT (pictured) 2 and 4 weeks later (top and bottom). P. gingivalis and RA each separately reduced bone regeneration (second and third columns) compared to normal mice (first column) but together this effect was enhanced (fourth column). Gum disease treatments may, therefore, be useful in helping RA patients recover from fractures faster.

Written by Lux Fatimathas

Search The Archive

Submit An Image

Follow on Tumblr

Follow on Instagram

What is BPoD?

BPoD stands for Biomedical Picture of the Day. Managed by the MRC Laboratory of Medical Sciences until Jul 2023, it is now run independently by a dedicated team of scientists and writers. The website aims to engage everyone, young and old, in the wonders of biology, and its influence on medicine. The ever-growing archive of more than 4000 research images documents over a decade of progress. Explore the collection and see what you discover. Images are kindly provided for inclusion on this website through the generosity of scientists across the globe.

Read More

BPoD is also available in Catalan at with translations by the University of Valencia.