Periodontists specialize in treating advanced gum disease, and work together with your general dentist to care for oral health by halting the progression of periodontitis and subsequently treating the various forms of gum disease.
What is the origin of an earthquake called in CA? Well, the origin of the earthquake is called the focus, and the point on the ground directly above the focus is called the epicenter. In CA, earthquakes generally originate frâ¦om the San Andreas Fault. Susie Harrell.
Earthquakes and volcanic eruptions occur due to plate movements. Plates are found under the crust of the Earth. These phenomena occur near plate boundaries. Countries that are on plate boundaries include Japan, Indonesia, Peru, Chile and the western edge of the United States.