"Periodontal tissues" refers to the gums and the supporting structures around the teeth. It includes the gums, bone, and connective tissues that hold the teeth in place. Full definition
Without additional help to keep inflammation down, infections at bay, and support healing of periodontal tissues - questionable teeth are almost always lost over time. (animaleo.info)
Additive Biomanufacturing: an advanced approach for periodontal tissue regeneration. (additivebiomanufacturing.org)