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.
Along Faults. Earthquakes can also occur far from the edges of plates, along faults. Faults are cracks in the earth where sections of a plate (or two plates) are moving in different directions. Faults are caused by all that bumping and sliding the plates do. They are more common near the edges of the plates.
To be more specific, most of the earthquake happens at the tectonic plates edgesâ boundary yet it can even occur in the middle area. Faults causing the earthquake can actually be located over the edges of the tectonic plate. Basically, there are different faults that cause an earthquake. They are reverse fault, strike slip fault and normal fault. The normal fault occurs following rock slides downward past other rock of block.