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.
How can earthquakes happen in places like Australia that are far from the edges of tectonic plates? Why are some parts of the world more active than others? Earlier this year, a 5.7 earthquake hit the north of South Australia, far from the edges of the Indo-Australian plate on which Australia sits. While most earthquakes occur along tectonic plate boundaries, a small number occur along faults in the normally stable interior of plates. These quakes are known as intraplate earthquakes. The SA quake reactivated a well-known fault system in the Musgrave Ranges of northern South Australia, says petrologist Professor Bill Collins from the University of Newcastle.