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Delta Bay Dental Group - Todd Wedeking For over 15 years, we at Delta Bay Dental Group have built a positive reputation for providing state-of-the-art-dentistry and comfortable visits in Brentwood, California. From our welcoming reception area to our comfortable treatment rooms, our staff is dedicated to meet your dental needs and exceed your expectations. Look forward to exceptional results when you become our patient.

Not only can we offer the highest quality care but we use the latest technology in the field of dentistry. Delta Bay Dental Group specializes in cosmetic dentistry whether that be porcelain veneers, Invisalign clear aligners, zoom teeth whitening, or fillings.
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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.
Your initial appointment will consist of a consultation explaining your diagnosis and treatment options. Occasionally, treatment can be done the same day as the consultation. However, a complex medical history or treatment plan will require an evaluation and a second appointment to provide treatment on another day.
At Delta Bay Dental Group we make every effort to provide you with the finest care and the most convenient financial options. To accomplish this, we work hand-in-hand with you to maximize your insurance payments for covered procedures. NOTE: Please let us know your current insurance information prior to your first visit so that we can expedite payments.
We deliver the finest care at the most reasonable cost to our patients, therefore payments and estimated co-payments are due at the time service is rendered unless other arrangements have been made in advance. Please remember you are fully responsible for all fees charged by this office regardless of your insurance coverage.
Reviews (39)
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Shirley Wong
Jun 24, 2022
Everyone that I met are very friendly. Tina, the hygienist is so nice and gentle. Dr. Rontal did something to my tooth that had been bothering me since January and I'm new to this office. They all seem to care for their patients. I definitely recommend this place to anyone.
S. Robinson
Jun 15, 2022
VERY disappointed. My son is a minor & his dad pays for his insurance. My son was approached about a bill in which my son ended up paying because he was embarrassed. They should have called his dad or charged his dad insurance. SO unprofessional.
Katelynn Mann
Jun 08, 2022
New office is beautiful! Everyone is always so friendly! Ally is the absolute best she makes me feel comfortable and the is my cleanings are always quick and painless.
Robie Poynter
Jun 05, 2022
1st appt went great. From X-rays to meeting Dr Rontal to my cleaning. So far so good and I recommend. 2nd appt was great! Super thorough cleaning immaculate facility.
Trish O'Connell
Jun 03, 2022
The entire staff at Delta Bay works as a cohesive team, all the way to the gals at the front desk. Dr. Joseph and Dr. Tone have ALWAYS gone above and beyond to take care of all my dental needs. We are fortune to have a dental office such as this, tight here in Brentwood.
Kristen Burrell
May 21, 2022
All staff was extremely nice and knowledgeable. The Dentist was really good. Clean and friendly place
Ashly M.
May 20, 2022
So incompetent. Sadly, they only care about money and not their patients. It's lovely to receive a bill six months after the fact; conveniently after I stopped being a patient there. Also, if you have to miss an appointment even for an emergency they love to charge you $50. They are in the business of making money. The lack of customer service speaks volumes.
Rhod U.
May 09, 2022
Looking for a good dentist? Look no further than this lovely group at Delta Bay Dental Group! I had a great experience from the services performed and professionalism from the staff. I highly recommend this office for dental services.
Ernest Luckhardt
Mar 14, 2022
The new office for Delta bay Dental Group is a very nice place, beautiful surroundings and new dental equipment, had a wonderful teeth cleaning with friendly employees, office is still under some construction but very nice dental office. recommended!
David Smith
Mar 08, 2022
The staff was courteous, skillful and highly responsive to my needs. I also really like the new office. I have never seen a dentist's office with such a nice floor and decorative design. I almost forgot why I was there :-
Maggie Deetz
Feb 10, 2022
I LOVE everyone at Delta Bay Dental. They make me feel welcome and are interested in me as a person. They are professional and very qualified. Dr. Joseph is the best dentist I have ever had and Allie I love cleaning my teeth. When I moved to Walnut Creek 2 years ago I never even gave a thought to changing to a closer office! The extra drive is nothing in comparison to the quality of care I get and the quality of their "caring" about me. Now after a third year of driving I still choose Delta Dental as the best place to go for dental care! The drive is nothing compared to the 5 star Plus service!
Krista Mashore
Dec 30, 2021
I was so very thrilled with Tane and her entire staff. They were kind, gentle, happy and totally professional. I have gone to another dentist and would cry when they gave the shots. It was nothing like that there. They treat you with respect and caring. It's not just a patient, it feels more like they are treating their family. Both of my daughters have gone there as well and we are patients for life. We love Tane and all of her staff. Krista Mashore
Tiggs L.
Nov 15, 2021
The staff in the back that works for Dr. Joseph and Dr. Rontal are wonderful. Both Dr.s are amazing and very gentle. I hate going to the Dentist but if you have to go this is the place you want to go to. Allie the hygienist does a really good job and is super sweet. Would not hesitate to recommend the staff that works on your teeth and both Doctors. I have tried 2 other Dentists here in town and both ripped me off of a lot of money. So be careful in Brentwood whom you choose. These two are worth it.
Jennifer Blake
Oct 20, 2021
Wonderful visit today! Christine did an amazing job cleaning my teeth and Dr. Joseph have a great consult. The office is pristine and I felt very comfortable with all the new procedures. Thank you ladies!
Mike C.
Oct 02, 2021
Dr. Joseph was AWESOME! As was Marsha the dental assistant. I would recommend Delta Bay Dental Group.
Elaine Karadais
Sep 16, 2021
Every experience I have here is so positive. All staff members are so kind and accommodating, especially, Dr. Joseph. She makes you feel so comfortable with her demeanor and skills.
Chauncey Robinson
Sep 06, 2021
It's a great place to go for your dental needs. The staff are friendly and the dentists don't cut corners. My crown hasn't been fitting right thus they keep sending it back until it's right. I highly recommend Delta Dental!
Amanda Gartin
Aug 26, 2021
My wife and I just switched dentists after moving out here 2 years ago. We didn't want to switch because we love our old office so much, but it became a hassle, so we decided to switch. It look about a month or so to get our first visit appointments scheduled, but it was worth the wait. Everyone was so amazing that we encountered. Everyone went into detail as to what they were doing and why and even talked us through a lot and showed pictures, it was great. We definitely enjoy this office so far!
Kori Henley
Aug 18, 2021
Delta Bay Dental Group is awesome! I've had a really traumatic dental experience in the past from another Dental office. I'm now a huge baby when it comes to going to the Dentist. Tina is the ABSOLUTE BEST! She does a great job, and makes going so much easier! Dr. Rontal is fabulous as well!
Colby B.
Jul 14, 2021
I have only received dental services from Dr. Joseph (at Delta Bay Dental group) but she is most certainly my all time favorite of any dentist I have had in my 50+ years of dentists. She will continue to be my GO TO dentist until one of us no longer needs or provides the service. LOVE HER!
Shelley Arnold
May 13, 2021
Delta Bay Dental continues with the best treatment I have not received in an extremely long time. Had my teeth cleaned yesterday and Tina made the experience delightful. Her wonderful personality and professionalism are beyond words. Thank you Delta Bay Dental Group!
Lori Hamel
May 06, 2021
Dr Rontal and Jody are awesome! Everyone at the front desk are very friendly and helpful.
Sarah Kelly Urrutia
Apr 08, 2021
I took my 4 year old here for her first dentist appointment. I can't reccomend them enough! Allie helped her feel so relaxed and special. It was fun to see her stubbornness turn into excitement. 5 stars all the way!
Gina F.
Apr 03, 2021
I've been putting off a crown and filling for over a year! Due to a horrible experience at a previous dentist a couple years ago where I couldn't get numb. They Continued to give me shots over and over and over. Never explained side effects, like racing heart beat! And sweating! Just kept Giving me more shots until I told Them to stop And just complete the procedure while I endured the pain to Get it over with. Dr. Joseph was amazing!

I didn't get numb after the initial numbing shot I let her know. And she knew what to do! Got me numb! Explained it all to me! And made it an experience of no pain! highly recommend her! We are moving out of state in the next few months. And I will definitely be flying back here for my dentist needs!
Effie Miknas Ashley
Mar 21, 2021
The ladies at Delta bay dental are amazing. Very professional and personable with every client. I've been with them for many years now. They provide excellent service every time. Thank you
Georgia Kuhnhoff
Mar 11, 2021
Very professional, thorough & friendly! I would recommend this dental group!
Mary M.
Feb 18, 2021
Seeing a dentist can be an unpleasant experience but Dr. Rontal and her staff makes their patients feel very pleasant and comfortable, thank you to Dr. Rontal and her staff.
Frances Payton
Jan 26, 2021
Everyone in this office was super friendly! They explained every step of the visit and did a great job! I felt welcomed and comfortable.
Karen M.
Jan 24, 2021
Dr. Jospeh was very kind and knowledgeable. Her team was also very friendly and informative. Great first experience! Thank you!
Lillian T.
Jul 21, 2020
I was so scared to go to a dentist because I had some bad experience, but when I went into Delta Bay dental group, they were so nice and made me part of their family, and The dentist was wonderful she did so much for my smile and made me feel very confident with my teeth
Melinda L.
Oct 14, 2019
Just became a patient at Delta Bay Dental Group. The office is beautiful and the staff is knowledgeable, friendly and fun. Dr Rontal is wonderful at explaining options, procedures and is extremely gentle. I actually had a great time at my visit. I highly recommend. Thank you for making my experience comfortable and fun. : Melinda Wiens
C. M.
Aug 15, 2019
Great front desk staff! Christine is the best hygienist in the world, and I love Dr. Joseph! Always a pleasant experience.
Connie M.
May 16, 2018
Have been using Delta Bay Dental for over 10 years and have never been disappointed. I love my hygienist and both Dr Rontal and Dr Joseph are gentle and thorough with their explanations and their work. Plus, it's so close to home and easy parking. What more could I ask for?
Larry U.
Nov 07, 2017
I'm usually nervous before my dental appointments having had some bad experiences getting my teeth cleaned at another dentist. My experience was no pain with all the staff members being very professional. The work I had to have done was also without pain. Glad I found them!
Danielle S.
Feb 28, 2017
Dr. Joseph is the best dentist I have ever had. She is so calm, kind and great at what she does! She has never made me feel rushed and I am so happy with how my smile has turned out. I don't write reviews very often, but wanted to be sure to give Dr. Joseph a glowing review because she deserves it!
Sam V.
Nov 20, 2016
Dr. Rontel and her delightful crew have been caring for my smile going on 3 years now. Always professional with that friendly warmth that you enjoy from caring, thoughtful people. all the qualities you look for and expect from everyone but find so little of in today's world. Theses days you always feel rushed or "just a number", but here we feel welcomed and invited.

I even enjoy the local photos on the walls. just those kind of little details that gives me confidence that the people around me are grounded to the local scene and are interested in the community. it's also fun seeing Dr. Rontel's smile showing up in 110 degree magazine, then in the grocery store carts then sponsoring a hole at a local golf tourney. makes me feel connected to a local success story who invests into the local economy. it just reinforces my belief that they care about me inside and outside the office: They have convenience of text reminders too that have come on handy too! Accommodating, caring, professional.can't say enough about Dr. "Tane" Rontel and her crew!
A. M.
Nov 17, 2016
This is the best dental office I have been to. I was scared to find out what my exam showed. Everything was explained so well by Dr. Rontal. The staff is very nice and the office very clean. I have been hopping from dentist to dentist but I don't have to anymore. When I went back for my fillings I didn't feel any pain and now that I'm not numb anymore it feels like nothing happened. I definitely recommend Dr. Rontal for all your dental work!
Daniel I.
Jul 22, 2016
Dr. Rontal is as professional as it gets! Her and Dr. Martine Joseph provide unparalleled service! For sure recommend their services to everyone!
Mark B.
Apr 16, 2016
Poor customer service, rude office staff and in general a gang of money grubbers. They specialize in setting appointments far in the future, and then hit you with a $50 missed appointment fee. I asked them on numerous occasions to notify me of appointments, but they never call. They also tried to convince me to have my old reliable silver fillings removed and replaced with ceramic, which is a scam I had already wised up to after finding out the hard way that the white ceramic replacements almost invariably lead to broken teeth.