1 Inflammation of the gingiva, bone loss, and increased gingival recession may progress slower than with other forms of periodontitis.  Periodontitis Associated with Systemic Diseases - Systemic diseases, such as heart disease, diabetes, and certain forms of arthritis, may have a correlation with periodontitis.
Main Content. An earthquake is ground shaking caused by a sudden movement of rock in the earthâs crust. Such movements occur along faults, which are thin zones of crushed rock separating blocks of crust.
Most earthquakes occur on plate boundaries for a variety of reasons. When plates in the earth's crust move, they scrape or bump each other on the edges and boundaries. Therefo â¦ re, the movements of the plates are more likely to be felt along the edges, where all of the activity takes place.