James Winterton Dentistry
James Winterton, DDS:
Practice Profile Page

James Winterton Dentistry
James L. Winterton, DDS
Newport Beach, CA






A list of major dental treatments which I offer my patients:

Dental cleaning

White fillings


Inlays & onlays


Clear aligners

Porcelain veneers

Teeth whitening

Dentures & partials

Root canal treatment

Tooth extraction

TMJ treatment

Dental implants



Monday: 8:00 am to 5:00 pm

Tuesday: 8:00 am to 5:00 pm

Wednesday: 8:00 am to 5:00 pm

Thursday: 8:00 am to 5:00 pm

Friday: 8:00 am to 5:00 pm

Saturday: Closed

Sunday: Closed



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Check out what some of our happy patients are saying about us:


I went to Dr. Winterton for a crown on one of my molars that was experiencing both pain and sensitivity to hot and cold temperatures.  Dr. Winterton was careful to explain all my options regarding treatment and was helpful in objectively answering my questions about what option might be right for me.  I truly didn’t feel “sold” (like I have at other dentists) or that he had an agenda as to what treatment was more lucrative for him.  The procedure went excellent and the follow-up was thorough.  The office is clean and the staff was very professional and helpful.  I have already recommended Dr. Winterton to a co-worker and wouldn’t hesitate to refer him again.


Dr. Winterton is super skilled. And very personable as is his entire staff. They are easy to work with. He is very thorough. He put a crown in for me yesterday that already feels like part of my mouth. His temporary crowns fit beautifully and blend right into your mouth and you don’t notice that they are there. Very meticulous work. Very reasonable prices. My family is sold on him and his staff.


I switched our family over to Dr. James L Winterton, DDS. in Jan of 2018 and it was the best thing I ever did!!  Dr. Winterton is an excellent dentist, he is knowledgeable and performs beautiful dental work. Sincerely, I can not say enough about his ability.   My husband cracked a tooth and needed a crown, he told me that he has never had a better experience, the fit was perfect!   It’s hard to find a great dentist who does excellent work and is honest in his practice but Dr. Winterton is both!!! I am so happy to have found this amazing dentist!


I just got a filling completed by Dr. Winterton, and I have to say that it was the easiest and most comfortable “dental experience” that I’ve ever had.  I didn’t feel a thing!!  I can honestly say that Dr. Winterton puts his patients at complete ease, and is so great at what he does.  I highly recommend him to anyone looking for a dentist.  As an aside his staff was great too!


Dr. Winterton and his staff really went above and beyond for me at my last visit. From when i first booked my appointment to my first visit the staff was very sweet and helpful. I haven’t been to the dentist in a million years and I was nervous, but Dr. Winterton was so kind and genuine & he really made me feel more comfortable. Thank you for everything you guys did for me I really appreciate it!


Can not say enough about Dr. Winterton. I’ve had my teeth cleaned with him twice now and it’s been such a pleasant experience. He’s a very good dentist; honest and always gives you the truth without glazing or selling you on anything. Highly recommend.


Dr. Winterton was very professional, got me on quick, and was very gentle on his exam and cleaning. very thorough and would tell me exactly what I needed and what was extra when it came to my treatment. Wound highly recommend to any of my friends/ family.


I have been going to this office for a very long time.  In the past I have seen Dr. Helliwell, but I saw his new associate Dr. Winterton for the first time and it was a great experience!  
He was very thorough in his examination, while at the same time, he really listened to my concerns and tried to address those first.  He explained what he was doing and what I needed very clearly and never made me feel like I was being ‘sold’ something I didn’t need.  The work he did for me looks great and was totally painless! The office is really clean and welcoming, and the rest of the staff was so nice.  They even babysat my crying baby while I had my teeth worked on. I have always been happy with this office and now after meeting Dr. Winterton I look forward to a long and happy future here.


I went to Dr Winterton as a referral from a friend. I thought that he was very profession and put the care into my hands. Given my dental history I have tended to be more conservative with my teeth. After his initial exam, we discussed my options. There are still 1-2 teeth that could be filled but we are still watching as they are symptomatic. In July of this year, I had excrutiating pain in my mouth and jaw. He promptly diagnosed and referred me to an excellent endodontist for a root canal. Dr Winterton did an superb job fitting me for the post root canal crown. I also appreciated his integrity and honesty. I ended up paying him $80 extra for the crown, which he reimbursed me with a check in the mail. I have 2 kids, who were seeing a different dentist prior, that are regular clients of Dr Winterton. His staff are friendly and he is excellent with kids. He is a great physician and one that I will continue to see for my dental care.


I was a patient of Dr. Helliwell’s since I was a youngster, going on for decades; now that he’s retired he brought in Dr. Winterton who is just as amazing. I know Dr. Helliwell would only pass his practice to a well-vetted and highly skilled Dr., and that Dr. Winterton is. The whole office staff is great. From the teeth cleaning and preventative measures they take to keeping your teeth looking and feeling great, I really trust them. I would highly recommend. Also, they keep their office so sanitary with air filtration devices in each room. They are doing their best to ensure a hygienic environment which is so important.


Going to the dentist is nothing I look forward to, but Dr. Winterton has made it as pleasant as possible. I have been twice now and am very happy with the care and service provided. He was able to answer all my questions and provide great instruction on a few problem areas of my mouth. I highly recommend Dr. James Winterton and I will be back.


Love this office! I have been dragging my feet to find a dentist in the area, since I moved here, that would match my high standards. I have found him! Dr Winterton is everything you want in a dentist, gentle, charismatic, empathetic, caring, and smart. Once my son gets his first tooth, he’ll be a life long client as well!


My husband and I and our 3 children (ages 12, 10, & 8) have been going to Dr Winterton for the bast couple years.  We had only very positive experiences with him and his office staff.  He is great with kids and they have even shown excitement about visiting the dentist.   I would recommend Dr Winterton for a great family dentist.


Dr. Winterton joined this great practice in 2014. He has since purchased the practice and continues to work with the same staff and patients that have truly become his second family. Dr. Winterton grew up in Provo, Utah where he graduated Cum Laude from Brigham Young University with a Bachelor’s degree in biology. After graduation Dr. Winterton obtained his DDS degree at The University of California San Francisco School of Dentistry. While in San Francisco Dr. Winterton met and married his wife, Jamie, a Newport Beach native. After completing dental school Jimmy and Jamie moved to Texas where Dr. Winterton furthered his dental education by working in various clinics and engaging in continued education programs focusing on implant restoration and Invisalign orthodontic treatment. In 2014 Dr. Winterton moved his family to Newport Beach to join, and ultimately purchase, the practice of his mentor Dr. Arthur Helliwell.

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