A dentist has been warned he faces jail after being found guilty of sexually assaulting a female patient while she was under sedation in his surgery.
Chee Wong, 47, committed the offence while taking out her wisdom teeth at his clinic in Guildford, Surrey.
He was convicted at Guildford Crown Court on Wednesday but cleared of two other sex assaults. The jury failed to reach a verdict on a fourth charge.
He was given conditional bail and told to sign the sex offenders register.
"This is a very serious offence and so all sentencing options, including custody, will remain open," Judge John Crocker told Wong, of Cranley Close, Guildford.
The court was told the married father of two gave his victim an injection of the sedative midazolam and operated on her alone.
His last dental nurse had left the practice some time previously.
The jury heard the drug could in rare circumstances produce sexual fantasies in patients and misinterpretation of surgical procedures.
In a police interview Wong claimed that he was gay - something he admitted in court had been a lie and a "silly excuse".
He also admitted being untruthful to police about the presence of his receptionist in the surgery while he performed the operation.
Defence counsel Jolyon Perks accepted that, by not having someone in the room with him at all times, Wong had "left the door ajar" to the allegations.
Prosecutor Johannah Cutts told the jury of the presence of Wong's DNA on one of his alleged victim's breasts and dismissed as "ludicrous" the suggestion that it had been picked up through contact and transferred there by the woman.