Meet Our Team

Delta Bay Dental Meet The Doctors

Dr. Tane Rontal, DDS

Dr. Tane Rontal is the founder of Delta Bay Dental Group. She received her DDS (Doctor of Dental Surgery) degree from University of the Pacific, Arthur A Dugoni, School of Dentistry in San Francisco.

Dr. Tane Rontal has shared her skill globally visiting Kenya twice to provide free dentistry to the Masai Tribe.

She is currently a member of Contra Costa Dental Society, California Dental Association, American Dental Association, Academy of Osseo Integration and Partnership Study Club.

Dr. Martine Joseph Nau, DMD

Dr. Martine Joseph Nau is originally from Quebec, Canada and is fluent in both English and French. She brings 20+ years of experience to the Delta Bay Dental Group.

Dr. Joseph is skilled in the latest dental technology and takes a personal and caring approach to make each patient visit comfortable and pleasant.

Dr. Martine Joseph Nau is happily married with two children. She enjoys water skiing, gardening, cooking and spending time with her family at the tennis club.

Meet The Hygienists


Christine has been in the dental field for over 23 years. In her free time, she enjoys camping, hiking, and spending time with family and friends.


Allie has been a Registered Dental Hygienist at Delta Bay Dental Group for over 10 years. She enjoys spending time with her kids, reading, and going on hikes in her spare time.


Tina has been with Delta Bay Dental since 2007 and has over 20 years of experience as a Registered Dental Hygienist. Her hobbies include golfing, crafts, and traveling.

Meet The Dental Assistants


Jody has been a Registered Dental Assistant for 20+ years with 15 of those years at Delta Bay Dental Group. She graduated at the top of her class. Jody enjoys doing DIY projects and camping.


Marsha received her RDA license in 2006 and has since made it her priority of making patients feel comfortable while in her care. She lives in Oakley and enjoys cycling with her husband and spending time with their kittens.

Meet The Front Desk Team


Daisy has enjoyed working in the dental field for over 6 years. She speaks fluent Spanish that helps Spanish-speaking patients. She is family-oriented and has been happily married for 13 years. Her hobbies include cooking and baking.


Sally has worked in the Dental Field for 40+ years. She is a seasoned Member of AADOM- American Association of Dental Office Managers. She enjoys boating and spending time with her family.