AboutSonia R. Mendez, DDS

Sonia R. Mendez, DDS is a South San Francisco based family dentist practice that treats patients of all ages. We are committed to delivering the highest quality dental care and do so using advanced dental equipment. We are a cosmetic dentist that offers services like checkups, teeth cleaning, crowns, veneers and more.

We also perform emergency dentist services that include bonding, root canals, crowns, and bridges. As a local dentist, we create lifelong relationships with our patients and their families and work to ensure that they receive treatments in a comfortable and relaxed environment. Dr. Sonia Mendez and our staff invite you to schedule an appointment by calling 650-588-8000 and experience why our patients think Sonia R. Mendez, DDS is the best dentist in South San Francisco.

Sonia R. Mendez, DDS

Dr. Mendez received her degree in dental surgery at UCSF in 2004. She worked for 10 years in San Francisco before taking over the practice of Dr. Dean DeRanieri in 2014. She strives to continue to provide excellent dental care to the residents of South San Francisco and its surrounding areas. Being a true believer in lifelong learning, her knowledge of dentistry is kept up-to-date with continuing education courses on a variety of subjects, including implants, cosmetic dentistry, and much more. She is an active member of the American Dental Association, the California Dental Association, and the San Mateo Dental Society. Her commitment to patient comfort and satisfaction ensures that every patient that comes into her care is treated with respect, kindness, patience, and a gentle touch. In her free time, she enjoys cooking, reading, and spending time outdoors.

Meet The Team

Kathleen Hartford


Kathleen obtained her dental degree (Registered Dental Hygienist) from Foothill College in 2010. Her love for clean teeth developed early because she grew up around the dental field with her mom managing a dental office. She enjoys cooking, hiking, reading, and spending time with her loved ones, including her husband and pup, Jameson.

Esmeralda Flores-Dueñas


Esme has been the office manager at this practice since 2002. The part of her job that she finds most rewarding is getting to know people and developing relationships with patients over the years. Hers is the friendly face that greets patients as they walk through the door. She enjoys spending time with her family, and hanging out with her boys in her free time.

Madelynn Mero


Daniela Castro


Flor Canas

Hablamos Español