Guess this dentist tried to pull a fast one.

John Collazos, a 47-year-old man accused of posing as a dentist, reportedly treated a woman for a toothache — by kissing her butt after giving her an injection, Hollywood cops say, reports the South Florida Sun-Sentinel.

Cops said that Collazos treated the woman in a Hollywood apartment, and charged about $65 for the services.

Collazos allegedly examined the woman’s mouth before administering a shot to her butt to alleviate the pain — and then kissed her buttocks, the report said.

He is also accused of inappropriately touching her genitals, police said.

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