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.
earthquakes along the plate margin. This is also referred to as a collision boundary. Earthquakes occur along the margin as a result of the plates grinding together, but no major landforms are made. As the plates move lava comes up and cools as it meets the water. This causes new crust to be formed. Small volcanoes can also be formed. As the 2 plates meet, the ocean plate sinks under the continental plate because it is denser. The oceanic plate melts, and composite volcanoes are formed along the margin. Earthquakes can also occur here because the 2 plates are clashing. A trench may also form at the margin. Earthquakes occur along the margin as a result of the plates grinding together, but no major landforms are made. As the plates move apart lava erupts into the ocean cooling and forming new crust. This can