The citywide dentist search is a directory fight, not your fight
The broadest dental query in the metro belongs to aggregators and well funded groups, and taking it back is not a plan.
Run the two word search and count what sits above the first independent practice. Insurance carrier finders. Review directories. A paid block. The map results. Whatever organic space is left generally goes to sites carrying years of links behind them.
The query is also worth less than its size suggests. Someone searching that broadly across Dallas County might be forty minutes from your chair and will never make the drive twice a year for hygiene.
Underneath it sits everything you can actually take. Suburb plus procedure. Procedure plus insurance question. Procedure plus a worry, like whether a crown can be finished in one visit. Each of those is a page, and most have nobody serious writing for them.
Win forty of those and you have more new patients than the head term would have produced, from people who live closer and have already decided what they need.