Smiles By Alex
Luong Nguyen, DDS:
Practice Profile Page


Smiles By Alex
Luong “Alex” Nguyen, DMD
Fountain Valley, 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


Offers Even28 at-home™? No

Offers Even28 at-dentist™? No

Offers Invisalign®? Yes


Monday: 9:00 am to 5:00 pm

Tuesday: 9:00 am to 5:00 pm

Wednesday: 9:00 am to 5:00 pm

Thursday: 9:00 am to 5:00 pm

Friday: 9:00 am to 5:00 pm

Saturday: Closed

Sunday: Closed





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

Dulce B. from Anaheim, CA (Source: Yelp)


Happy and no regrets that I chose Dr.Alex for my implants.He is  soft spokeN,nice,always smiling and knows his expertise.His hands are light,not pressing on my jaw and gives reassurance every time he gives local anesthesia.The whole staff are also nice and friendly.I already recommending to my friends and families.

Ann Cao (Source: Google)


Smiles by Alex is a wonderful dentist office. I have been a patient there for the last couple years and Dr. Alex is so professional and knowledgeable. The office staff is also great and extremely accommodating. I would highly recommend them!

Nguyen Phu Quy Kevin (Source: Facebook)


I just move from Boston and needed a good implant specialist. Thank God, I found Smiles by Alex. Dr. Luong is an expert, when it comes to dental implants. I highly recommend Dr. Luong!

Tommy V. from San Francisco, CA (Source: Yelp)


I didn’t feel any pain at all during the implant surgery. The procedure was done fast and pro. The doctor explained all the details and answered that i had. The place is clean and airy.  I would recommend this office to anyone who wants to have a dental implant.

Jimmy To (Source: Google)


I drive at least an hour to go see Dr. Nguyen and his team, thats a testimony to how professional and knowledgeable they are. I can’t say enough good things about them, especially Thanh and Catherine who are always nice and welcoming to me! Thank you guys for your hard work!

Sean W. from Mount Hope, KS (Source: Yelp)


I was early but they had me in the chair quickly. Having my service dog with me, they were VERY accommodating in getting her some water.  It takes awhile to properly fit dentures and Teresa made sure the animal got to potty. The temporary teeth feel weird but it is because they’re new to ME.  Thank you Alex for having a great staff.  I’ll see you ALL again in 6 weeks

Susie T. from Huntington Beach, CA (Source: Yelp)


Dr. Alex and his staff are great.  I did not have to wait for a long time in the waiting room. I was taken back and prepped at the time of my scheduled appt. I had two teeth extractions and did not have any pain.  It went very smoothly! I do not have dental insurance and i was given a cash discount.  Thank you!!!

Ted Moore (Source: Google)


Excellent service and care! I had a very thorough cleaning and training session yesterday by Catherine!. This was the first cleaning visit where the dentist was called over to check my xrays and teeth in 3 years. It was also the first visit since January. Because of the Pandemic, I was not able to get a cleaning at a three month time period in more than 10 years!

Amy Hand (Source: Google)


I was at a crossroads with my teeth 5 years ago. I grind my teeth in my sleep and being in my 60’s…well..time to do something drastic. Dr. Alex is just the perfect dentist in this situation. He is honest with his analysis and explained completely my options. He made the extensive process I needed much less stressful (and painless) than I ever anticipated. I truly love my teeth and him !!! I am happy to be back in So.Cal. and in his care again after being out of town for a couple of years. Thank you very much for my smile 🙂

Angie R. from Long Beach, CA (Source: Yelp)


What a wonderful and professional office with excellent dental work, gentle, and pain free and i am a chicken about the dentist.  Cannot believe it took us this long to find the perfect place.  I would recommend them to anyone.  Strongly!

Leanne H. from Tustin, CA (Source: Yelp)


I am a HUGE chicken when it comes to going to the Dentise. I literally will have a panic attack because of horris experiences in the past. But this past labor day weekend my tooth cracked, and the pain was horrable. Dr. Alex not only got me in asap, he and his amazing staff quickly calmed me down and gave me such a pleasent experience ( even though I got my tooth pulled & prepped for a implant) . I actually was so calm I started to fall asleep during my extraction ( yes I realize, hard to believe right!!) But the truth. I VERY HIGHLY RECOMMEND  any & all people go see Dr. Alex, he truly has the gift of gentleness, and patience. And his staff is as great as Dr. Alex. If Dr. Alex can make me WANT to go back for more dental work….well let’s just say, after 50 years, I finally found a dentise I can trust!!

Erin Toler (Source: Google)


This is my 2nd time visiting Smiles By Alex. I have an unhealthy fear of the dentist as most people have. The 1st time I visited I had to have a bottom tooth extracted. Alex worked on me and talked me through it the whole time, asking if I was ok and how I was feeling. He reassured me the entire time along with his assistants. So when I had to go back for a 2nd visit, a little over a year later (I have no insurance that’s why the long wait). I was naturally a little scared to find out what was wrong but not nervous about how I would be treated. Seen Dr Day who was super sweet and very reassuring and put my heart at ease. Nice to know that the dentists (not just Alex) care deeply about their patients. Thank you to all the Doctors, assistants and staff, you are amazing!

Nhan Nguyen (Source: Google)


I highly recommend Dr. Alex. Very professional and attentive to his patients. The staffs are super friendly. The office is very nice and clean. I feel very comfortable each of my visits. The result is very good everytime. One of the best dental offices I know.

Tommy C. from Huntington Beach, CA (Source: Yelp)


Ok so they are exactly what I Figured. My final appointment is this coming Tuesday. If there was a 100 Star  Button this would definitely call for 100 easy.
My teeth are already beautiful just with the temps I’m wearing. Tuesday they will put my crowns and bridge and I’ll be forever grateful. Thanks Dr Alex and especially the Staff and the Office environment. My before and after pictures are the most amazing experience I’ve ever seen. All those years I could have came and had some work done. Just glad I have Alex Now. I’ll be getting customers referrals constantly with my. Beautiful smile. Gives me so much confidence.
I Love this Place. 

Kim B. from Mission Viejo, CA (Source: Yelp)


Dr. Alex is really a great dentist!  He’s informative and honest abt what services are actually needed!  That’s so important whe U are relying on a professional and you have no idea if he’s being honest abt what needs to be done…. You can feel rest assured that he’s not just trying to up sale you!  Will definitely be coming back to his office!!!!!

Fitz C. from Costa Mesa, CA (Source: Yelp)


Dr. Alex and staff offer the utmost professional services in Orange County. At Smiles by Alex offers a honest family atmosphere where any patient feels welcomed. Great work and I highly recommend Dr. Alex to anyone…

Jennifer N. from Fountain Valley, CA (Source: Yelp)


Dr. Alex is such a great and honest dentist! He will give you the most resonable price.  He was not like any other dentist I’ve been too.  He spent time with me explaining the procedures and what is the best option for my student budget.  I recommended my entire family and friends to go to him! His cleaning special is so cheap that I come in for a cleaning at least 3 times a year!

Richard Sandoval (Source: Google)


Dr. Alex is a very knowledgeable dentist in many areas of dentistry. He is honest & fair. I went to him for a 2nd opinion and he advised that I did not need the services that another dentist had recommended. The office is very clean & modern and the staff is very pleasant and friendly. I recommend Dr. Alex to all of my friends and family.

Juliusntina Rotstein (Source: Google)


Dr. Alex is a amazing and we have been going to him for years. My family loves him and friends of ours go there too. The girls that work there are awesome. The dentist hygienist is the best. DR. ALEX IS THE BEST AROUND.

C. H. from Long Beach, CA (Source: Yelp)


I have gone to this office for years and have been treated so well by everyone there. This is a great dental office. Dr. Alex is amazing. He’s intelligent, personable, direct and really knows what he is doing. He always presents me with options on care and patiently answers any questions I have. He takes his time with me so he is sure I understand what he’s presented. It is important to me that my doctor explains his reasoning and opinions regarding the best course of action.

David P. from Santa Ana, CA (Source: Yelp)


For some reason, my previous 5 star review from 1-25 only shows up when I log in to my Yelp account like it’s a Draft but not otherwise. Not sure why that is or found any way to assure that it actually posted properly … I’ll do it again in hopes it works this time. Anyway, had the pleasure of another great appointment last week to remove an existing crown and install a temporary for two weeks until the new one is fabricated. Doing the work was Dr. Ross Day, a very skilled Dentist who I met for the first time. I found him to be very personable and highly skilled as all the staff at “Smiles by Alex”. The entire ordeal went smoothly and was painless….which was great. Crowns can be difficult to remove and I never felt a thing. As I’d mostly gotten used to Dr. Alex and his exceptional ability, Dr. Day was a testimonial to what a great and well rounded experience you can expect when you go there, which I’ve been doing for nearly 2 years now and NEVER been disappointed in any way. I very highly recommend “Smiles by Alex” to anybody….and this is coming from someone who used to dread the Dentist due to bad past experience. Dr. Alex really cares about his patients, and it shows.

Roy Kawahara (Source: Facebook)


Alex is top shelf!!! Started the tooth implant process and his work is very painless. I didn’t have any discomfort thru the whole process so far. And the next day, it felt as if nothing happened! !!

Aaron Haley (Source: Google)


Had a great experience today. It had been awhile since my last visit , but so glad to see that Dr. Alex and his pleasant staff give the same warm, friendly, and thorough cleaning Ive experienced before. Beautiful office, nice large waiting area too. Honestly, highly recommend. HB and Fountain Valley residents, come visit this office. A very sincere neighborly and friendly vibe here. I’ll be back in six months for my next check up, Carolyn! : )

JC Keegan (Source: Google)


This dental office is great! The office staff is friendly and helpful. The hygienist is thorough and works well with kids. Most of all, I appreciate their honesty and no pressure approach. They do a good job in assessing your needs, educating you and allowing you to make the decision on your treatment. (This is such a relief to many dental offices who pressure you into unnecessary procedures for money…grrrrr…). Thank you, Smiles by Alex!

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


Honesty is very hard to find in dentistry these days, but I can vouch for dr Alex – he is a good man and a good dentist.  After visiting Beachside Dental and getting a quote of about $6,500 worth of work needed (total scam) dr Alex was able to fix my teeth for under $1,000.  He did everything he could to save me from getting any extra work done and after slipping him $100 for his honesty, he made sure it was delivered back to me.  He wouldn’t take the tip and was incredibly humble and sincere.  I would recommend him to everyone I know and will fly back from Australia to see him on a regular basis.  Ask for Dr Alex when you go- and book early- he fills up fast.

Ali K. from Kansas City, MO (Source: Yelp)


New location looked a little bigger. They reminded me the new location during their reminder call. Alex and his staff have done excellent job in explaining my dental needs, planning when to address those needs and the possible cost of these needs. I have been using them since I moved to Orange County in 2011.

Philippe L. from Alhambra, CA (Source: Yelp)


As much as I appreciate yelp reviews, I am one of those guilty of not providing as much feedback as I would like to. I had such a great experience that I’m taking the time to write a review for my experience with Dr. Alex and his wonderful staff.
From the partking, there was plenty of parking in a plaza with lots of convenient stores around. Equipment is up to date and the xray process just took literally a minute. Didn’t have to bite on any xray cards (really used to hurt my gums). My procedure consisted of repairing a broken cavity and the removal of my last 2 wisdom teeth. Dr. Alex was very thorough on explaining the precedure before he began and even asked me several times during the extraction if I was feeling any pain. The procedure was painless and I could never be this thrilled to talk about a dental visit. His prices are very fair but most of all the technique and his patient consideration was just superb. Highly Recommended to anyone that needs dental service or just a simple check up.

Erin T. from Fountain Valley, CA (Source: Yelp)


Never thought I would say this about a dentist office, but they are amazing! Had my teeth cleaned, one pulled and had an implant. They are so amazing, kind, loving and caring! Things you hope for but usually dont get in a dentist office. Love the Drs and staff, so kind and loving.

Long Pham (Source: Google)


Alex and all the staff are super nice and professional. Especially Catherine my hygienist. She is very detail and giving best advice to what I need to keep my teeth clean and last..! Thanks everyone for your great services

Bruce Delmonico (Source: Google)


Alex of Smiles By Alex and his entire staff take good care of me every time I go in. Had the second molar pulled today and prepared with a bone graft for a Tooth Implant. And this molar was the hell of all molars, but Dr. Alex kept cool – like he had done other tough ones like this many times and that kept me from getting panicky. All and all – great job. Great people. And reasonable pricing. You just can’t go wrong picking Smiles By Alex!

Gee D. from Irvine, CA (Source: Yelp)


Dr. Alex is very friendly and top-notch. Aside from running his own practice he teaches a graduated course at UCLA, hence the office being closed on Tuesdays. His exam was thorough and informative. He also did not try to suggest any procedures that were unnecessary just to have me spend more money. The office is nice, clean and the staff was friendly.

Don N. from Huntington Beach, CA (Source: Yelp)


Fantastic doctor!  Was really nice, gentle, and super informative!!  He has a great staff that greeted me as I came in.  Lots of magazines to read too!! He pulled out my wisdom teeth (all 4) and was super gentle with it; I did not swell up the next day nor did I have to take any of the pain killers. A must go-to doctor!

Andy T. from Buena Park, CA (Source: Yelp)


Hygienist Catherine’s expertise was unsurpassed. I used to get nervous and frightened because of the pain from deep cleaning. Since Catherine started cleaning my teeth, I was not fearful anymore. No pain. She always greeted patients with a smile and her caring for patients was excellent. Thank you so much, Catherine.

Vitoe Le (Source: Google)


Alex and his staff are incredible. Everyone is very warm and friendly. They make you feel at ease. Dr Alex is very attentive and makes sure you feel no pain during your time there. I love this place, and I recommend that everyone go here.

Dave P.  from Valley Adams, Santa Ana, CA (Source: Yelp)


On my last visit to Kat for cleaning about a week ago, it was found that I had a severe root  infection under a back bridge crown. Today we started the planned remediation procedure which included extraction and oral surgery/bone graft and will end with implants for 2 of the 3 bridged teeth. Since I had similar work done on the other side in the last 2 years by Dr. Alex, I knew what to expect.
AGAIN and AS ALWAYs, it went perfectly and painlessly!! With Liberte assisting as before, Dr. Alex performed his magic while I remained calm and comfortable during the entire ordeal. I have been a patient of his for over three years now, and have NEVER had an issue that would make me apprehensive as years before where I dreaded going to the Dentist. (And put it off because of that.) In my opinion, Dr. Alex is one of the all time best, and a great human being who totally deserves “5 Stars” all day long!!!  Highly recommend without reservation!


Dr. Luong Nguyen is a graduate of the Boston University, School of Dentistry. He is a respected member of ADA, CDA,OCDS, and has fellowship with the International Congress of Oral Implantologists. In addition to being a Assistant Clinical Professor at the UCLA School of Dentistry GPR and Hospital Dentistry Program, he owns a state-of-the-art private practice in beautiful southern Orange County. Dr. Nguyen has extensive knowledge and experience in placing implants since 2005, and is always at the forefront of implant dentistry by Continuing Education, various study clubs, and inventing his own surgical techniques. As a strong advocate of providing quality dental care, Dr. Nguyen has an upscale practice that is equipped with 3D cone-beam computed tomography, use of laser dentistry and CEREC. With various knowledge of techniques and technology, Dr. Nguyen is able to provide various treatment options ranging from simple dentistry to full mouth reconstruction completed in house.