A Marlborough dentist was arraigned Wednesday on charges that he placed a secret camera, secured with dental wax and medical tape, inside the staff bathroom of the dental practice where he worked, authorities announced.

Patrick Tu Huynh, 35, of Marlborough was arraigned on seven counts of photographing a person in a state of nudity without consent, two counts of unlawful wiretap, and destruction of property, the Middlesex County District Attorney’s office said in a press release.

A dental assistant at New England Dental Group found a camera taped to the toilet of the staff bathroom in May, the DA’s office said. The dental assistant allegedly reported finding the camera to Huynh. The dentist allegedly removed the camera and told the staff member that he would try to identify the person re

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