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.
The earliest known earthquake was documented in 1769 by the Spanish explorers and Catholic missionaries of the PortolÃ¡ expedition as they traveled northward from San Diego along the Santa Ana River near the present site of Los Angeles.