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.
Making the world better, one answer at a time. Usually along boundaries between tectonic plates in the crust, although mid-plate earthquakes also occur with some frequency. Usually along boundaries between tectonic plates in the crust, although mid-plate earthquakes also occur with some frequency.