She would book hotel rooms in Singapore to perform procedures such as maintenance of braces and veneer application.
However, her ruse was up when a disgruntled customer reported to the authorities that she could not floss her teeth after having veneers put in by the so-called "dentist".
Siti Shahrima Abd Rahim, a 37-year-old Malaysian, was fined S$2,500 (US$1,850) by a district court on Monday (April 8).
She pleaded guilty to one count under the Dental Registration Act, with a second similar charge taken into consideration.
The court heard that Siti works as a part-time waitress at a hotel in Johor Bahru. She would communicate with potential customers on Carousell or WhatsApp and inform them of the hotel locations a few days before the procedures, branding herself as a Malaysian dentist.
In total, she provided composite veneers to about 20 customers, performed braces maintenance on about 10 customers and provided cosmetic braces to at least one customer.