For All the Smiles in Your Family
Call now: (925) 449-8788
Amy Vanderbilt-Fessa, RDH
Registered Dental Hygienist
Our staff of hygienists and dental assistants are very experienced. They have earned degrees and certificates from San Joaquin Valley College, Chabot College, and Las Positas College. Our staff keeps up with the latest techniques and innovations, particularly concerning the best care for gum health and periodontal disease, through regular continuing education. Each member of our team is very personable and works hard to understand the needs of each patient.
Wendy B. Duong, DMD
Carly Pschier, RDA
Registered Dental Assistant, Office Manager
Meet Our Staff
Amy "Lou" Ingram, RDH
Registered Dental Hygienist
Welcome to our office! Dr. Sommer, Dr. Duong, and our entire staff of hygienists and dental assistants work hard to maintain your comfort and well-being while helping to keep your smile healthy. Get to know about us, our journeys to this office, and most importantly our individual and collective commitments to dental health.
Sonja Sommer, DDS
Rosa Hernandez-Manzano, RDA
Registered Dental Assistant
Claudia Garcia-Garcia, RDA
Registered Dental Assistant
Jessica Cortez, RDH
Registered Dental Hygienist
Dr. Sommer and her husband are proud to have raised their daughters in Livermore and to have been part of the Livermore community for over 30 years. They are supporters of local performing arts groups and are founding members of the Bankhead Theatre. When she is not in the office, Dr. Sommer enjoys walking and biking on trails around the Tri-Valley, singing in her church choir, and swimming. She also enjoys travelling in the U.S. and abroad to visit friends and family near and far. Take a look around the office for photos of waterfalls from some of Dr. Sommer’s favorite destinations!
Dr. Sommer is a member of the ADA, CDA, Southern Alameda County Dental Society, and the American Dental Association Advisory Circle.
Dr. Wendy Duong was born in Oakland, California and obtained her Bachelors in Nutritional Science at UC Berkeley and received her Doctor of Dental Medicine degree at the University of Nevada, Las Vegas. She stayed in Las Vegas and later in Houston for a few years. She enjoyed exploring different areas but she couldn't forget the good weather in California and found her way back to the Bay Area.
She admires all aspects of general dentistry, but especially enjoys restorative, fixed prosthodontics, cosmetic, and pediatric procedures. She strives to help her patients achieve their dream smile without fear of being at a dental office. Dr. Duong's empathetic personality and her gentle touch allow her to connect and build long lasting relationships with her patients.
Dr. Duong loves spending time with her family on the weekends, enjoys going on hikes, golfing, and learning new recipes to cook. Dr. Duong is a true foodie and loves a nice cup of tea.
Dr. Duong is a member of the ADA and Women Dentists of Tri Valley.
Dr. Sonja Sommer grew up in Santa Rosa, California as a first-generation Danish-American. She knew she wanted to go into health care from a young age from watching her mother have a successful career in nursing. She attended the University of California, Davis and earned a Bachelor of Science degree in Animal Physiology in 1989. She then went on to receive her Doctorate of Dental Surgery degree from the UCLA Dental School in 1993.
Dr. Sommer came to Livermore after dental school to join her husband who had started his career at the Lawrence Livermore National Laboratory. She practiced in a few offices in Livermore and Pleasanton before starting work with this practice in 2000. She has remained with this practice ever since and became the owner in 2006. Dentistry continues to provide Dr. Sommer with the opportunity to apply the benefits of scientific knowledge to help others have a healthy smile. Her goal for the practice and motivation for dentistry have always been to build and maintain collaborative and trusting relationships with patients in order to support their dental health needs.