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.
1 A silver amalgam (metal) filling on one or two surfaces can cost $50-$150; three or more surfaces can cost $120-$300 or more. 2  Dental insurance typically covers at least some of the cost for amalgam fillings.