Use this when the user names a US city (206 covered) and asks what a dental implant costs there, or how many clinics the figure rests on. Returns the observed city average for a single implant, the clinic count and the state implant band for context (open dataset, DOI 10.5281/zenodo.20819438). Only the implant series is published at city level: other procedures go to dental_cost_by_state. Pass state (2-letter code) to tell apart cities with the same name. Phrasings: "implant cost in San Antonio", "what does a single tooth implant run in Denver", "¿cuánto cuesta un implante en Miami?", "costo de un implante dental en Houston". 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.