Gentle Dental Placentia
Michael Simonian, DDS:
Practice Profile Page


Gentle Dental Placentia
Michael Simonian, DDS
Placentia, CA













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

Dental cleaning

White fillings


Inlays & onlays


Pediatric dental care


Clear aligners

Porcelain veneers

Teeth whitening

Dentures & partials

Root canal treatment

Tooth extraction

Sedation dentistry

Dental implants


Offers Even28 at-home™? No

Offers Even28 at-dentist™? No

Offers Invisalign®? Yes


Monday: 10:00 am to 7:00 pm

Tuesday: 9:00 am to 6:00 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: 7:00 am to 4:00 pm

Sunday: Closed





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

Tim C. from Placentia, CA (Source: Yelp)


(…)they took me right at the time of my appointment.   The office has the latest xray and exam equipment, including the rotating xray machine that provides a 360-degree view of your entire mouth–teeth, jaws, etc.  The first time I went was for a cleaning and exam.   Dr. Simonian has a great chair-side manner and put me at ease right away.  I had a sensitive tooth and he immediately noticed a filling was partially missing.  He took the time to replace the filling properly to ensure it wouldn’t fall out again.

I also needed two crowns–a replacement for an old one and a new one over a cracked tooth. I’ve had terrible luck with crowns; they usually wind up as root canals.  But these fit and feel great!  Dr. Simonian was very careful to make sure the molds he took were as accurate as possible.  Even the temporary crowns felt good!  

I’ve been there three times now–once for the cleaning/filling, once for the crown molds and temporaries,  and once for the final crown fitting.  Each time, the staff and Dr. Simonian greeted me by name and remembered me from the previous visit.  

Even more impressive, the last time I was there, they were treating an adult who had obvious developmental issues.  I have a nephew with severe autism so I know it can be challenging to relate to the developmentally disabled, especially in a stressful situation like a dentist’s visit.  But the staff treated him respectfully and patiently, and didn’t patronize him.    

I’m going back in a little more than a month to get fitted for a night guard to reduce my teeth grinding problem.  I’d recommend Gentle Dental and Dr. Simonian to anyone!

M. Renee H. from Orange County, CA (Source: Yelp)


I brought my son (three) to see Dr. Simonian for his 1st dental appointment. He had a great experience! Dr. Simonian was patient and gentle with my son. Dr.S showed him the tools before he used them and answered all of my sons questions. He even told him some jokes.The assistant who did the polish was also kind and great with kids. My son was giggling because he said it felt tickly.

Additionally the office staff were friendly and courteous. The office itself looks brand new and was sparkling clean.

Zoe N. from Anaheim, CA (Source: Yelp)


I had a dental appointment today with gentle dental for the first time. The good news is I had no sugar bugs. The great news is I loved my new dentist. The staff is very helpful, patient and friendly. Overall, I had the best experience.

Sevilla (Source: Facebook)


Great Doctor, staff and location. Would recommend coming here for quality and trustworthy work.

Christian Duran (Source: Google)


The doctor was a straight shooter and had a great trick for a painless injection.

Debra Iverson (Source: Google)


I take my two little boys here. They are so good with them and its quick easy and painless. I have had (unpleasant) experiences with other dentists and so far we love it here.

Jenna S. from Orange, CA (Source: Yelp)


I visited Gentle Dental Placentia for the first time today. What a great experience! My mom referred me and she was right about this place. It was a quiet Monday afternoon but I’m sure they provide the same top quality care regardless.
The front of office staff – especially Judy – helped me with paperwork and insurance issues. Dr. Simonian was pleasant and extremely knowledgeable. He made me feel comfortable during my visit and confident about my dental care plan. Thanks!

Cindy T. from Yorba Linda, CA (Source: Yelp)


Today was my very first experience here at the Gentle Dental office in Placentia. I was slightly nervous about coming in since I haven’t had a check-up in years… Yes, YEARS! However, upon meeting Dr. S., Henny, and Nicole, I had an incredible experience!! Dr. S. and his staff were extremely kind, accommodating, and patient to my needs! I highly recommend this office!!

Nicole Barker (Source: Google)


I love this office (…) Everyone is so friendly, the back office was welcoming and the girl in the front office was great at asking and scheduling my next cleaning appointment. If your not familiar with your insurance then I can understand why some people in other reviews may think it is an up sale but in my experience is was not. The manager was very clear that some of the things were recommended and were not covered by my insurance but over all they allowed me to decided and explained everything to me. I would definitely recommend this office and say give it another try.

Nicole B. from Huntington Beach, CA (Source: Yelp)


The love Gentle Dental Placentia. Judy in the front is always smiling and so friendly. Nicole ( great name by the way) came out to the lobby greeted me and welcomed me to the office. Dr. Simonian is always so warm and friendly. Hes a great joke teller and makes your visit as positive as it can be for being at the dentist. Henny and Yaritza help in the back and are so knowledgeable. They go out of their way to ask how you are doing and if you need anything. This office is awesome. Its very clean and modern. They are up to date with the latest dental technology. I would recommend them to anyone looking for a warm and welcoming dental office along with providing great dental work.

Jennifer L. from Placentia, CA (Source: Yelp)


The dentist can be a stressful visit but not here. Everyone from the front office staff to the dentist himself was nice, attentive, informative and helpful. Judy at the front desk helped with paperwork and getting me situated. Henry made sure I was comfortable & understood what was going to be done. Michael S was knowledgeable, gentle & informative as well.  Made sure I was comfortable with work that needed to be done.  I will definitely be returning to Gentle Dental & recommending them often.

Ghernandezii from Placentia, CA (Source: Yelp)


The name says it all!  Michael Simonian, DDS is AWESOME!  I felt no pain in any of my procedures.  Great staff.  What I like most of all was that ALL my scheduled appointments I never had to wait longer than 1 minute to be attended to.  KEEP UP THE AWESOME WORK!!!!!

Jennifer H. from Newport Beach, CA (Source: Yelp)


First time client and I have had a great experience with the staff and my work done here. They made me feel very welcomed and explained all the procedures before doing any work on me. If there was any concerns they also answered my questions. I will be going back for a crown and not afraid do go back to them!

Christopher Dobson (Source: Google)


I was a little nervous about my first dental checkup in years but the whole staff was very comforting and personable. Plus, they had me out earlier than expected. Thank you

Rina R. from Huntington Beach, CA (Source: Yelp)


Overall great experience. Dr Simonian was very personable and gentle. I came into the office for a routine teeth cleaning and ended up having to replace an old filling. Although my moth is a bit sore, I left there feeling like he took great care of me and really cares about his patients. I’ll be back!

Susie S. from Placentia, CA (Source: Yelp)


Dr Simonian is my dentist, I have had a fear off dentistry for many years. I broke my front tooth four weeks ago and had no choice but to go to a dentist.
I was referred to Dr Simonian, I thank my luck stars for that. Dr Simonian truly is the most caring , wonderful calming honest dentist I have ever dealt with. He is providing me with a beautiful new smile and state of the art dentistry.
What a great combination, thank you Dr Simonian and Gentle Dental, together they provide quality dentistry at an affordable price..

Cindy Truong (Source: Google)


Today was my very first experience here at the Gentle Dental office in Placentia. I was slightly nervous about coming in since I haven’t had a check-up in years… Yes, YEARS! However, upon meeting Dr. S., Henny, and Nicole, I had an incredible experience!! Dr. S. and his staff were extremely kind, accommodating, and patient to my needs! I highly recommend this office!!

Sara M. from Yorba Linda, CA (Source: Yelp)


I absolutely don’t like going to the dentist and it terrifies me, but Dr. Simonian does such a great job that I didn’t feel a thing! I have never recommended a dentist to anyone before because I’ve truly never been happy with one, but I would 100% recommend Dr. Simonian to everyone if they’re in the area or looking for a new dentist. My husband and I are happy with choosing gentle dental.

Rina Johnson (Source: Facebook)


Great experience overall. Dr Simonian was very gentle and provided a very personable experience. I would highly recommend this dentist and will definitely be back!

Justin Eden (Source: Google)


What I’m about to say is not to impress the dentists and employees at Gentle Dental Placentia, or anyone else. I simply wish to state legit facts from my experience. Nothing more, nothing less. Literally every person in there treated me warmly and with respect. Judy at the front pleasantly & quickly got me checked in, offering me water, coffee & even a danish slice! The young lady assisting Dr. Simonian was very friendly, quick and attentive in getting my X-rays completed and helping the doctor with his various needs. Dr. Simonian was down to earth, helpful, knowledgeable and compassionate as he thoroughly explained my dental situation. You can tell he takes great care in his work which I appreciate very much. Another young lady was super charming and sweet as she explained pricing & my procedure options & things I can do at home to help my teeth. I’ll be back in two weeks to laser clean the left side of my mouth, then I’ll be doing regular checkups to track maintenance and progress. All in all— professional, positive, quick, compassionate, thorough, generous and skilled. Thank you all!

Anna S. from Cypress, CA (Source: Yelp)


Everyone at this office is so nice. Dr. Simonian is such a talented dentist who is patient and funny! His assistant and everyone else at this office are​ just as awesome, too! The best Gentle Dental office and I hope it always is this wonderful!!!!!!

Melissa C. from Yorba Linda, CA (Source: Yelp)


Yesterday was my first visit to Gentle Dental- what a great experience I had! All staff members I interacted with (Receptionist, Dental Hygienist and Dental Assistant) were so friendly, helpful and just genuinely interested in my well-being and oral care. I will absolutely be back and recommending to friends and family.

Thanks so much Gentle Dental! 🙂

Jason S. from Ewa Beach, HI (Source: Yelp)


I can’t express how good Dr. Simonian is as a dentist. He genuinely cares about you as a person and your comfort/needs. I personally had a ton of anxiety going to the dentist, but now I have little to none. I would never see another dentist!

Patty Antalics (Source: Google)


This dentist is the best i have ever been . I’m afraid of dentist but he’s one of the best. Very patient and understanding.

Christina Dorates (Source: Google)


Office was very professional and kept up. Everyone on time got done thoroughly and quick! From the front office staff to the back office staff everyone was great

Satesh L. from Orange, CA (Source: Yelp)


I had a great experience at Gentle Dental in Placentia. Dr. Simonian was very nice. I am used to Dentists being so condescending and intrusive.  Dr. Simonian was very caring and made me feel so much at ease. His wonderful staff Nicole and Henny are fantastic as well. Henny was great welcoming in and Nicole was a great listener and they both made feel like family. I would suggest to anyone that has fear of going to a dentist to please visit Gental Dental in Placentia as they are a wonderful office!!!!!!! On a scale of 1-10 I would give this office an 11!

The most important message I want to say is the good feeling I felt after my visit to this office! Kudos to such a wonderful doctor and his wonderful staff!!!!

Ann Marie L. from Anaheim, CA (Source: Yelp)


We had the most pleasant experience at this office. I took my elderly father there and he was treated with such respect and gentleness. Everyone in the office was friendly, patient and helpful. I would recommend this office to any of my friends!

Mehrdad M. from Placentia, CA (Source: Yelp)


(…)(Michael Simonian’s) bedside manner and technique are bar none. He’s the guy you refer patients to who might be afraid to go to the dentist. He is super sweet and honest. Sadly, he left California altogether, and set up shop in Nevada for years. I was sure that we had lost him for good. Recently, my mother was looking for a dentist, and she found a certain name that sounded awfully familiar to her. Luckily, I was there when she asked me about him, and now she is a believer as well. I couldn’t be happier that Dr. Simonian is back where he belongs, and in Orange County to boot! If you are looking for a dentist, please look no further. Because, you will NOT find a better dentist anywhere. This man simply cares about doing it right, and doing it honestly. I can’t tell you how many other dentists would try to pull the wool over my eyes, and I would have to go to him to get the honest to goodness truth. Dr. Simonian has saved me a lot of time, grief, and money over the years. Now, he’s taking care of another generation of my family. God bless you Dr. Simonian. I hope you never retire or ever leave us again! 🙂

K. H. from La Verne, CA (Source: Yelp)


Top-notch treatment at Gentle Dental Placentia (on Rose Ave.)!
The administration staff, nurses, and doctor were professional and considerate about meeting all of my dental needs.

But hands down Dr. Simonian is undoubtedly the BEST dentist I’ve ever had! He is thorough, caring, gentle, and has a wonderful sense of humor that keeps you relaxed throughout your appointment.

If you’re looking for a new dental office look no further.

Max T. from Anaheim, CA (Source: Yelp)


I never write reviews, ever. So this is big for me but I really enjoyed my experience here. My little sister and I had appointments scheduled for a check up and the staff was incredible. Highly recommend gentle dental. Everyone is so welcoming and they let you know exactly what’s going on with your teeth and how to go about fixing those things.

Not a fan of going to the dentist but I did not mind coming in today. Come check them out. You won’t be disappointed!

Toni C. from Glendora, CA (Source: Yelp)


Dr. Somonian is a great dentist. Very professional. He has performed an experimental procedure to regrow the bone loss of my teeth. I’m happy to report that the procedure is a success. This means I do not have to get implants or wear dentures. I recommend Dr. Somonian to all my friends my co-workers.

Nicole M. from Placentia, CA (Source: Yelp)


Excellent and speedy! Great with my son, friendly and very well informed!! Dr Simonian is awesome!!

Erica Ramos (Source: Google)


Dr Simonian is great! I took my 4 year old niece and he was very gentle, patient and caring with her. She loved him and wasn’t scared at all, thanks to the great team over there!!