Our Team

Our warm friendly staff is focused on what matters most – you and your dental health. 

Tsai-Chun Hong, DDS


Dr. Tsai-Chun Hong is a graduate of the New York University College of Dentistry. She completed her dental residency at the Brooklyn Campus of the Veterans Affairs, New York Harbor Healthcare System. She is a member of the American Dental Association and California Dental Association  in good standing. In her free time, she likes to spend time with her family. 

Barry Pham, DDS

Product Management

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Nicola Guerrero

Office Manager

Nicola is an integral member of the Ontario Family Dentistry Staff. In her capacity as office manager, Nicola ensures the office runs smoothly so the dental staff can provide each patient the personalized care they need. 

Rocio Garcia


Rocio is usually a patient’s first point of contact when they connect with Ontario Family Dentistry. She looks forward to creating a positive dental journey for patients by welcoming them to the office. Rocio is bilingual, and helps our Spanish-speaking patients so that communication is not a barrier to treatment.

Cynthia Huepa

Staff Assistant

Cynthia supports the Ontario Family Dentistry staff by building relationships with patients and helping them with any questions or concerns that they may have. A bilingual Spanish speaker, Cynthia ensures patients receive the care they need in a language they understand.

Darlene Marquez

Dental Assistant

Darlene brings brings compassionate care to all patients. She looks forward to contributing to patients’ overall health by encouraging the achievement of optimal oral health.