Arroyo Grande, California. For the California wine region, see Arroyo Grande Valley AVA. Arroyo Grande is a city in San Luis Obispo County, California, United States. The population was 17,716 at the 2013 census.
1 Tooth-colored resin fillings usually cost between $90 and $250 for one to two teeth, and between $150 and $450 for three or more.  Porcelain or cast-gold fillings are the most expensive option. They can cost anywhere from $250 to $4,500, depending on the size of the cavity.
Amalgam â This is a mixed filling made up of silver, tin, zinc, copper and nearly 50% mercury. Amalgam lasts about 10 years and is the least expensive dental replacement filling. The average cost for amalgam fillings is between $110 to $200 per filling. Composite resin â This filling is made of plastic and glass, lasting up to five years. It is more expensive than amalgam, but matches the color of your child's teeth. Treatment can be completed in only one visit to the dentist.