John W Sinclair, DDS
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John W Sinclair, DDS
When you visit our office, your smile is our top priority. Our team is dedicated to providing you with the personalized, gentle care that you deserve. Petaluma dentist, Dr. John Sinclair, DDS has practiced general, cosmetic and children's dentistry for over 25 years. He is a graduate of the University of California San Francisco's award winning dental program.

Dr. Sinclair is a proud member of; The American Dental Association, California Dental Association, Redwood Empire Dental Society, Academy of Laser Dentistry, Organization for safety and Asepsis Procedures, Dental Organization for Conscious Sedation and the American Academy of Cosmetic Dentistry.
Services
We are a Petaluma, CA dental practice devoted to restoring and enhancing the natural beauty of your smile using conservative, state-of-the-art procedures that will result in beautiful, long lasting smiles! A standard of excellence in personalized dental care enables us to provide the quality dental services our patients deserve.
In the past decade there has been a dramatic interest in cosmetic dentistry. We all realize that having a healthy, bright, beautiful smile enhances our appearance and allows us to smile with confidence. Thanks to the advances in modern cosmetic dentistry, we are able to improve our teeth and smiles with quick, painless and surprisingly affordable treatments.
LUMINEERS are an excellent option for people who are unhappy with the cosmetic appearance of their teeth. These ultra-thin porcelain veneer slips fit perfectly over the teeth making them look cosmetically perfect, white and completely beautiful. An off-white or crooked smile can cause serious confidence problems.
Tooth whitening (or bleaching) is a simple, non-invasive dental treatment used to change the color of natural tooth enamel and is an ideal way to enhance the beauty of your smile. Because having whiter teeth has now become the number one aesthetic concern of most patients, there are a number of ways to whiten teeth.
A crown (or cap) is a covering that encases the entire tooth surface restoring it to its original shape and size. A crown protects and strengthens tooth structure that cannot be restored with fillings or other types of restorations. Although there are several types of crowns, porcelain (tooth colored crown) are the most popular, because they resemble your natural teeth.
Reviews (23)
Matt P.
Matt P.
Jan 29, 2022
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New patient today with Dr Sinclair and had a great experience. Staff was super friendly and Dr Sinclair not only did a fantastic job, but also bothered to follow up in the evening just to make sure my tooth was fine. Clearly cares about his patients and the customer service of his business. 5 stars.
Jan Johnson
Jan Johnson
Jan 04, 2022
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My experience with John W. Sinclair and his staff was excellent. He took the time to talk to me before beginning the dental exam. He explained everything about my teeth/mouth as he went along. I trust his evaluations, knowledge and conclusions I wish I had discovered this practice years ago.
Jan Schmidt
Jan Schmidt
Dec 27, 2021
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Technician was professional, friendly and did wonderful job cleaning my teeth painlessly. I was welcomed in on time, so no waiting. Room was clean and bright with a nice view of trees and sky.
Chase Miles
Chase Miles
Nov 02, 2021
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Absolutely wonderful. From Cindy at the front desk to Niurka and Kelly as hygienists and Dr Sinclair himself, I couldn’t ask for a better experience with better people. I’ve already recommended this office to all of my close friends and family.
R. N.
R. N.
Oct 01, 2021
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Dr Sinclair and his whole staff deserve 5 stars! Everyone is friendly and makes you feel comfortable. I had to have a tooth pulled. Ugh! I was very nervous and Dr. Sinclair is great at putting you at ease and making you feel very confident that all will be well. He's the best when it comes to giving injections. I didn't even feel them!!! My tooth was out so fast I didn't have time to think about it. I highly recommend Dr. Sinclair for any dental work you may need. He also always tries to make the procedure needed at the lowest cost instead of like a lot of dentists you feel like
Erin S.
Erin S.
Sep 28, 2021
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Both my 85 year old father and I are patients of Dr. Sinclair. He is an amazing dentist. He is also kind, considerate and responsive. My father has a lot of problems and these include emergency situations , especially for him. Dr. Sinclair listens to him. He cares a lot about people. He makes us all feel important. He respects his patients. I have no love for dental work. But, he has taken a lot of my fear away, too. I highly recommend his practice.
Diane Landman
Diane Landman
Jun 20, 2021
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This past Monday I was in need of a dental appointment ASAP prior to having medical treatments. Dr Sinclair returned my call from the answering service that afternoon and was able to schedule an appointment the following morning. Thankfully he completed the procedure and kept my medical treatments on track which was very helpful for me.
S. Hermann
S. Hermann
Jun 12, 2021
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Have no fear of dentistry here!
Dr. Sinclair and his staff are kind, caring, and competent. It's actually a joy visiting his office for dental care and reassuring knowing that he and his wonderful staff accommodate me for occasional dental emergencies, too.
Jackie Holmes
Jackie Holmes
Jun 10, 2021
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Have gone to the same dentist for 25 years and one visit with Dr Sinclair I learned more about my teeth than I ever knew.
I highly recommend Dr. Sinclair and his whole office everybody was so helpful.
Mary Disharoon
Mary Disharoon
Jun 02, 2021
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Dr. John Sinclair is the best! He’s been my dentist for 20+ years. I appreciate his precise yet painless dentistry skills, his kindness, his availability, his mellow vibe, and the excellence of his office staff.
Christine C.
Christine C.
Jan 14, 2021
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This is my second yelp review for Dr. Sinclair. I first reviewed him last year when I had a very thorough check up and got the bad news that I needed some extensive dental work. I had the first of those appointments yesterday, which was two hours and not fun! Yet somehow, he and his staff made it-- if not exactly fun-- not horrible either, which is how I had expected to feel. Dr. Sinclair does everything he can to make his patients feel comfortable, minimize or eliminate any pain and even while he and his staff are very professional, they will even make you laugh. Or at least smile. After
Michelle J.
Michelle J.
Aug 19, 2019
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My only sadness is that it turns out Dr. Sinclair is not in my insurance network so I won't be able to afford coming there in the immediate future, but I am happy to pay the out of pocket cost for the exam I received from this office recently. The dentist and staff were friendly, well educated, and thorough.

Having moved around a lot, I have become very skeptical of most dentists. I have been screwed around by a lot of dentists who see me as a new patient, see the fillings I've had since childhood and think they can take advantage of me and my insurance from the get-go. From being told
Karen S.
Karen S.
Jul 17, 2018
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I have been a patient of Dr. Sinclair's for over 15 years. The care I receive from him and his staff is excellent. Not to mention, they are a friendly and upbeat bunch, which is a good thing at a dental office! Dr. Sinclair is very knowledgeable and thorough when explaining various options, and has a very gentle approach (especially when I've had to get a dreaded shot, he is very calming and reassuring and it never ends up being as bad as I fear). And kudos to dental hygienist Kathy for always remembering my comfort preferences, good one-way, distracting conversation, thorough
David B.
David B.
May 26, 2018
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I've been going to Dr. Sinclair's for about 5 years. As always, he provided caring, conscientious and as painless as possible care. The entire staff is very friendly and wants to make sure you are as comfortable as possible. I've (unfortunately) had lengthy procedures, and they are completed without a problem. I highly recommend Dr. Sinclair's practice.
Diane P.
Diane P.
May 07, 2018
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When my husband and I tell people we love our dentist, we get some eye rolls for sure. We've been patients for 20+ years. They are unfailingly upbeat. They manage your expectations by walking you through all processes, meeting commitments, and helping you understand your options. They go way, way above and beyond what I've ever experienced with any dental office when it comes to emergencies including several staff coming in a few times when office was closed (I can't promise that for other patients of course). When I had dental emergencies while traveling, Dr Sinclair was there for
Sandi C.
Sandi C.
Oct 27, 2017
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I foolishly dropped my partial denture in the sink and broke off a tooth. I called Dr. John's office and Cindi scheduled me to see Dr. John and send it off to the lab the first thing the next morning. I was back into the office at 2:30pm the same day to pick it up and have it adjusted. I don't think you can beat that for customer service!
Debra R.
Debra R.
Dec 21, 2016
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I drive all the way to Petaluma from San Francisco to go to this dentist because Dr. Sinclair listens and gives me choices. I could not find this type of consideration in San Francisco after contacting several dentists and asking questions.

So far I have gotten one crown and some minor repairs on some chipped teeth. I couldn't ask for a better atmosphere or more professional work. I have had no problems with what has been done. I do not feel I am having procedures I don't really need pushed on me for the financial benefit of someone else.

Also the staff is very cheerful and helpful
Jane R.
Jane R.
Aug 13, 2016
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I've been going to Dr Sinclair for a long time now. Both Dr Sinclair and Kathy the dental hygienist are wonderful. I've tried a lot of dentists in my life and Dr Sinclair is the most honest and caring one of all, great for people who are afraid of dentists. And Kathy is always so cheerful. I moved to the South Bay a couple years ago which means I have to drive an hour and a half to get to Dr Sinclair's office, but it's totally worth it. I have no plans to find a local dentist.
Carla O.
Carla O.
Apr 01, 2016
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I am so happy my friend referred me to Dr. Sinclair. For the first time in over 20 years, I had a good visit at the dentist. Because of past experiences, I have avoided dentists for years. That is over now, thanks to Dr. Sinclair. All of his staff are super nice and cheerful, and Dr. Sinclair is some kind of genius! I am so grateful for his care and concern and skill. I am looking forward to getting the remainder of my work done. No fear any more, thank you for that!
Roz H.
Roz H.
Aug 19, 2015
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My first ever yelp review, just to say I had the best teeth cleaning ever today with Kathy at John Sinclair DDS, it could not have been better, my teeth feel so clean! She is so thorough and so nice, can't wait to go back, and who can say that about the dentist!
Kathleen C.
Kathleen C.
Dec 30, 2014
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Dr. Sinclair is an amazing , accommodating and virtually painless shot administering dentist. My family and I have been going to him for over 20yrs and he has been there for us during non office hours in various dental emergencies. I also enjoy the fun and upbeat staff. Kathy is excellent at making teeth cleaning go by smoothly and quickly. Nanette, the assistant, is funny as heck. Cindy , at the front desk, is great at keeping things going smoothly and making sure we remember our appointments. I would recommend this office to anyone
Joe P.
Joe P.
Oct 08, 2014
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I've been going to Dr.Sinclair since is was 5. Dr. Sinclair went WAAAYYYYY out of his way to help me out. This past week I got a hold of Dr.Sinclairs office because of a terrible tooth pain I was having. This pain had been going on for months but it finally got to a point where I couldn't stand it anymore. When Dr.Sinclair took a look at the X-ray and at my tooth I had no doubt that he really knew exactly what he was doing. He gave me clear instructions on what needed to be done, adjusted an old filling and I was on my way. Highly recommend!
C. H.
C. H.
Jun 18, 2014
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My husband and I have been patients of Dr. Sinclair's for several years. He and his team are amazing and provide outstanding dental care. We have been going there for the last 5 + years and they have always been caring, friendly, and done an amazing job. If you haven't been in a while and are looking to get back into a great routine, they will help you make it happen!

John Sinclair and the team rock!