Sydney fake dentists were 'butchers'

Two allegedly fake dentists have been described as "butchers" by a former patient after she was left with left with a gap between her teeth through which she could whistle.

Majid Rahebi and Shirin Ramezani Kharavani have pleaded not guilty to three charges for allegedly carrying out illegal work on Amira Karam at a western Sydney dental surgery in October 2018.

Ms Karam described the two accused as "butchers" after they allegedly botched a procedure to repair a broken filling.

She told Downing Centre Local Court on Wednesday a chunk of her tooth fell out while Kharavani was drilling, prompting Kharavani and Rahebi to have a heated argument in front of her in a language she did not understand.

Rahebi then took over but didn't put on gloves, Ms Karam told the court.

She was told to come back two more times to complete the root canal but when she did nine days later, another doctor, Charley Wang, told her he couldn't finsh the job because of damage done during the previous operation.

She said she was given the choice between a refund or Kharavani completing the procedure.

Ms Karam said she told Kharavani: "I wouldn't want a butcher going near my mouth again."

The patient said she received $300 back but later that night she was called by a man she identified as the same man from her previous visit.

She said Rahebi offered to fix her teeth and also asked whether she would lodge a complaint with authorities.

Prosecutor Sean Flood earlier told the court that when Ms Karam arrived at Guildford Dental Care, Kharavani introduced herself as the "drilling specialist" while Rahebi described himself as the "crown specialist".

Ms Karam told the court that Rahebi had introduced himself as "MG" or "MJ".

Rahebi's defence lawyer Peter Kondich asked Ms Karam how she could identify his client if he never introduced himself by name, but she said both were accepted abbreviations of Majid in Arabic.

The hearing before magistrate Joan Baptie continues.