iSmiles Orthodontics
Ousama hillal, DMD:
Practice Profile Page


iSmiles Orthodontics
Ousama hillal, DMD
Irvine, 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

Sedation dentistry

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: 8:00 am to 6:00 pm

Thursday: 9:00 am to 5:00 pm

Friday: 9:00 am to 5:00 pm

Saturday: 8:00 am to 1:00 pm

Sunday: Closed





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

Grace G. from Rancho Cucamonga, CA (Source: Yelp)


I love ISmile orthodontics!!! I followed Dr.O all the way from Arizona Dr.O and his amazing staff are a great team always friendly and happy to see us, they have top of the line ortho treatment. I took my oldest daughter to him, after seeing the amazing results I got mine started. Now I take my middle daughter to Dr.O too. I worked in the dental field over 11 years and have gotten consultations with others and honestly they tried to fool me. Thanks to Dr. O for his great work that he’s done for me and my daughter’s

Lisa S Grobmyer (Source: Facebook)


Every time you walk in, you are greeted by name, feel important and never have to wait! The staff is amazing and would never take my kids anywhere else! Highly recommend iSmiles Orthodontics to everyone in need of orthodontic care. iSmiles also supports the community and makes each client feel special!

Clicia H. from Brooklyn, NY (Source: Yelp)


Don’t make a habit of writing reviews, but I believe that when people are doing something right, we should recognize it. We have been with ISmiles for 2 months now. Here are the reasons why we love them: 1) easy to make an appointment. They are very flexible and always willing to work with our schedule.  2) extremely detailed explanation of the treatment, expectations, areas of care and payment options. 3) great environments very clean, all the chairs are in an open, easy to see area. 4) the MOST important reason, the staff is amazing. Really caring, they always greet is with a genuine smile, and make a true effort to get to know not only the kids but the parents as well. They follow up with us on a very timely manner and always accessible to answer any questions. Overall, this has been a great experience!

Lisa G. from Irvine, CA (Source: Yelp)


I can’t say enough good things about iSmiles Orthodontics. From the minute you walk in the office you feel like family! I have had two kids who have been clients and they always are treated with kindness and respect. There is always a contest/drawing to participate in along with fun prizes for winning! The entire staff is supportive, not only in the office, but they are active in the community. Sponsoring local Jog-a-thons, 5Ks and many other community events! Hands down the best Orthodontics office around. If there are any instructions for home, they make sure you completely understand them before leaving. If you have questions, you can pick-up the phone and ask. Office staff is very informative and are willing to get you taken care of asap! If you or family members have orthodontics needs, this is the place to go… No need to look anywhere else!

Monette P. from Anaheim, CA (Source: Yelp)


There aren’t enough words to express how amazing this place is. From when I first walked in and had my consultation (which was last year), to now, I have felt welcomed every time I walk through the door. The staff is amazing and they take the time to build a report with their clients. I couldn’t be any happier with them and with the results that I’m getting. Thank you so much for everything! You’re making me so much more confident with my smile!

Jade H. from Huntington Beach, CA (Source: Yelp)


I was so happy with my visit today, everyone was so friendly and understanding . I love coming to Ismiles because the people here are very helpful and they  are me feel welcomed . I know they are faking great care of my teeth and I can’t wait to see my new smile  !

Alyson W. from Irvine, CA (Source: Yelp)


We are so thankful to Everyone at iSmiles Orthodontics.  When I was looking for an orthodontist, after going to other offices for quotes, I was impressed by iSmiles streamlined process, beautiful and family friendly offices and different plans for each of my daughters orthodontics.  My girls just got their braces off, have beautiful smiles and couldn’t be happier.  The staff is super friendly and so accommodating on appts and work with you to make it all work with your schedule.  I also have younger children and the waiting area is stocked with things to keep them busy while we were at appts. with my girls.  I highly recommend iSmiles for your orthodontic needs.

Madison Gentry (Source: Facebook)


I love everyone here ! They are all so welcoming and I look forward to coming in every time! So happy with the improvement of my teeth and can’t wait to see the end result!

Ashleigh H. from Irvine, CA (Source: Yelp)


My sister goes here. Even though I am. Not a patient I always get greeted with a big smile:) I love this place they always decorate for all the holidays and make you feel as comfortable as possible, recommend this place to anyone who is in need for braces :)!

Sam Dunk (Source: Google)


Almost have my braces off, nearing my second year. Every time I come for my appointments, i am greeted nicely and i never have any problems with the staff. I would highly recommend iSmiles to anyone!

Hogai Y. from from Irvine, CA (Source: Yelp)


I love this office. Very professional best service and friendly. Also, not pushy to sell you service. Not Like all other, ortho office in Orange County. This was the only office that told me to wait another year on my son’s case. Best Orthodontist!!

Keola San Diego (Source: Google)


The staff at iSmiles Orthodontics are very effective with their work, sweet, funny, and interactive. I love and enjoy coming to every appointment! They are people you can trust and really care about succeeding in getting you the perfect smile

Brooke P. from Laguna Niguel, CA (Source: Yelp)


HANDS. DOWN. THE. BEST!!  As a 20-year veteran in the field, I don’t say that lightly!  Dr. El-Hilal (aka Dr. O) is knowledgeable, compassionate and most importantly honest!  With more than 15 years of experience, he creates beautiful wide smiles!  One you will be proud to show off!! You are warmly greeted by Mary when you first arrive and Rosa and Javier will make you feel comfortable the first time you set foot in the clinic!  With more than 50 years of combined experience iSmiles is ready to handle any and all of your orthodontic needs with ease!  They are making Irvine smile for sure!

Elle K. from Torrance, CA (Source: Yelp)


100% Best place to go to for your orthodontic needs ! Dr O really knows what he’s doing! The staff is super welcoming and makes sure to take care of your needs. Definitely thankful for Javier ( one of the staffs ) for telling me to give iSmiles another shot. Initially, I came to Dr. Branden for my orthodontic treatment, but I disliked the results. It felt rushed and I didn’t feel like he cared about the results of my teeth. I told my concerns to Javier and he told me that I should continue my treatment with Dr. O.  Dr. O was able to fix my teeth without removing any and I’m really loving the results so far . I’m excited to get them off in the next month (hopefully ) 🙂

Liliana Skurnick (Source: Facebook)


I recently moved to Irvine and we had to follow up the treatment for my daughters braces. The doctors are amazing as well as the staff. I am so happy I was able to meet this fantastic group of people. IsmilesOrthodontics is the best. Thank you!

Karina M. from Irvine, CA (Source: Yelp)


OMG! Seriously, THE BEST PLACE EVER! If you seriously are looking for an Orthodontist…..just stop looking and call them now! I promise you that you will have the BEST experience ever. The staff and you become insta-BFFs (but in the most professional way of course). In all honesty, I am grateful that I have iSmiles in my life now! Their help, time, and dedication in making sure my 15 year old son and I were comfty was above and beyond what I ever could imagine! They even helped me figure out best case scenarios in treatment, costs, and upcoming insurance coverage selection for 2016. Oh iSmiles….where would I be without you?????  Oh wait I know…at home stressin’ about how I could best fix my and my son’s grill!!! I am now a forever iSmiles loyal patient.

Alexandra M. from Newport Coast, Newport Beach, CA (Source: Yelp)


Our kids have been coming here for almost a year now. The doctors and staff here are super nice, friendly, and knowledgeable. They are very accommodating especially when we need to reschedule our appointments even at the last minute.  Even when their office isn’t opened and it’s just the administrative staff here, they were able to see us during a couple of minor emergencies.  We are happy to find this office and highly recommend their services!!!  Thank you!

Chanel M. from Irvine, CA (Source: Yelp)


This place is spectacular! You won’t find a place better than iSmiles! Having to get braces was a scary thing for me but once I began going there I couldn’t wait to go back and see all their welcoming faces! Iv’e been going there for 3 years and everyone treats you like family. I definitely recommend coming here if you want a great smile along with a great staff!

Sahar D. from Irvine, CA (Source: Yelp)


My daughter, Ameira, goes here and it has helped her so much. Her teeth are better than ever and she feels absolutely amazing! The staff and doctors are so kind and my daughter feels like a part of the family! I give a big thanks to iSmiles orthodontics for everything and if you ever need an orthodontist this is the place

Megan M. from Irvine, CA (Source: Yelp)


Front start to finish they have been the best orthodontics location ever!! The front desk is always so helpful, the consultation was very informative and organized, all the staff are very knowledgeable and take great care of my daughter, and the doctor is exceptional. He takes his time, takes pride in his work, and does a perfect job!! We are very happy with everything so far.

Ozy M. from Downey, CA (Source: Yelp)


One of the best dental experiences I’ve had. Professional, clean, friendly, and diligent. Conveniently scheduled me around my lunch time and I didn’t wait more than a couple minutes to see the dentist. Was genuinely helpful and removed and fixed part of my retainer for no extra cost

Lisa S Grobmyer (Source: Facebook)


Every time you walk in, you are greeted by name, feel important and never have to wait! The staff is amazing and would never take my kids anywhere else! Highly recommend iSmiles Orthodontics to everyone in need of orthodontic care. iSmiles also supports the community and makes each client feel special!