Use this when the user asks what a dental procedure costs in the United States in general, with no state or city, for one of the 12 procedures. Returns the national cash band (low / average / high, mean of the 51 state figures incl. DC), its basis (observed or estimated) and the states at both ends of the range of state averages; cosmetic procedures carry no state variation. Phrasings: "average cost of dentures in the US", "typical US cost for braces", "¿cuánto cuesta una endodoncia en Estados Unidos?", "costo promedio de carillas en EE. UU.". Do not use for: diagnosis, treatment choice, a named insurer's plan price, dentist recommendations, countries other than the US and Canada. Observed market research with a source URL and period on every figure; not a quote, not medical advice.