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.
Quick Answer. Earthquakes happen when the boundaries of the Earth's tectonic plates bump and slide past one another; sometimes, they get stuck on jagged edges and cause earthquakes once they are released. These earthquakes are always followed by aftershocks starting from the same epicenter.