Meet The Doctors

Meet The Doctors

At Middlefield Dental Group, we're proud to have a team of dentists driven by their dedication to providing quality care for patients of all ages. Dr. Peter C. Kono, Dr. Martha G. Vanzina, and Dr. Thomas Kono are passionate about creating positive dental experiences and helping every patient feel comfortable and well cared for. With their combined experience, they approach each treatment with a focus on personalized care tailored to the needs of your entire family. Whether you're visiting for routine checkups or more in-depth treatments, their goal is to build lasting relationships and help you achieve and maintain healthy, beautiful smiles for years to come.

Learn more about our dedicated dentists below:


Peter C. Kono, DDS

Dr. Kono has been a member of the Palo Alto Dental Group since 1998. He embraces innovative dental techniques, and seeks to exceed his patients’ expectations for care and service. Dr. Kono was born in Viet Nam and moved to New Hampshire in 1973. He graduated from Southwestern University in Georgetown, Texas and the Loyola University School of Dentistry in Chicago. He completed a General Practice Residency with the U.S. Navy at Naval Hospital Oakland. Dr. Kono served as head of the dental department aboard the USS Bellau Wood, stationed in Sasebo, Japan, and completed his active duty status at the Naval Air Station in Key West, Florida. He is trained and certified in the Plasma-Arc teeth whitening system and the placement of Lumineer prepless porcelain veneers. He is a member of the American Dental Association (ADA), the California Dental... Association (CDA), the Peninsula Institute of Advanced Dental Studies (PIADS), and the Baja Medical/Dental Study Club, and a past member of the Seattle Study Club (SSC) and the International Congress of Oral Implantologists (ICOI.)


Martha G. Vanzina, DDS

Dr. Vanzina received her degree from Pontificia Universidad Javeriana in Bogotá, Colombia, with a residency in Oral and Maxillofacial Surgery. Following graduation, she served with the National Armed Forces Hospital in Bogotá while maintaining a private practice. She is an accomplished researcher as well as a clinician, and has published research on non-invasive surgical techniques. She moved to the Bay Area in 1997 and has been part of the Palo Alto Dental Group since 2004. Her patients often express their appreciation of her warm, attentive manner. She is a member of the American Dental Association (ADA), the California Dental Association (CDA), the Academy of General Dentistry (AGD), the Mid-Peninsula Dental Society (MPDS), and the Peninsula Institute for Advanced Dental Studies (PIADS).


Thomas Kono, DDS

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