"You just think if you worked on my teeth and you were not licensed, what else could you have done?" said Jamie Keahbone, a former patient at Signature Smiles in Tulsa.
She said she got a new crown at the dental office a year ago, but it broke in May.
"It's a lot of money that I paid out of pocket, and now I'll have to pay another dentist," Keahbone said.
Altogether, she estimated paying more than $4,000 in dental procedures since 2011.
She claimed dental assistant Paige Maples, who's been charged for practicing without a dental license, worked on her teeth.
"The woman who was not supposed to be practicing dentistry is the woman who did all my work in the last year and something months," Keahbone said, "I won't be afraid to ask in the future, are you licensed to be doing this?"
She plans to file a complaint with the Oklahoma Board of Dentistry.
Currently, the dental office is closed, while the board investigates several allegations.