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Dentists in Eastvale, CA

Welcome to Bright Now Dental, your premier dentist in Ontario, CA committed to providing exceptional dental care in a warm and inviting atmosphere. Conveniently located at 4910 Hamner Avenue, Suite 110, our state-of-the-art practice proudly serves patients from Ontario, CA, along with our friendly neighboring communities, including Jarupa Valley, Chino, Upland, Corona, Pomona, and Claremont. Whether you need routine preventive care, advanced restorative treatments, or transformative cosmetic enhancements, our highly skilled team is here to help you achieve a healthy, radiant smile.

Located in the Goodman Commerce Center near the intersection of Hamner Ave and Cantu-Galleano Ranch Rd.

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Actual Patient Reviews
Gerardo S. on Google
Apr 20, 2026
I had an amazing experience at this dental and orthodontics office. The staff was welcoming, friendly, and made me feel comfortable the entire time. Both the dentist and orthodontist were professional and explained everything clearly so I knew what to expect. The office was clean, modern, and very organized, which made the visit even better. I would definitely recommend this place to anyone looking for high-quality dental and orthodontic care.
Victor . on Google
Apr 23, 2026
My teeth are nice and white
Angela A. on Google
Apr 14, 2026
There literally aren't enough stars to give these amazing people. when I say they go above and beyond I mean they go above beyond to Infinity the Moon and back. On two different occasions I have needed my state plate retainer fixed in a short period of time and they have worked miracles both times to get that retainer fixed and back in time to me. Saying I'm grateful to them is an understatement. Not to mention how gentle the dentist was. I had four teeth pulled at once and literally felt nothing during the procedure or after. I am someone who is terrified of dentist but with him I'm not scared anymore. They are so patient and understanding. If you're somebody who is scared of dentists this is the place to come.
Its_steph101 . on Google
Apr 10, 2026
My grandmother had such an amazing experience she really liked the doctor 10 out 10 experiences.
Nicholas M. on Google
Apr 10, 2026
Went in with my mom and the receptionist was very helpful and made the whole process smooth. Really made it an easy visit
Diana K. on Google
Mar 30, 2026
Good location, staff are friendly. A little pricey but overall, great experience.
Danielle G. on Google
Mar 30, 2026
Loved the doctor, staff was friendly
Priscilla C. on Google
Mar 30, 2026
The service is always fast and the staff is very friendly. My daughter loves going there; Dr. Castellanos and staff are very patient.
Monica M. on Google
Mar 30, 2026
I had a wonderful experience at this office. I can't say enough good things about this doctor who was patient and caring wtih my son, Oliver. The office was clean and the staff was friendly.
Alma M. on Google
Mar 21, 2026
I was very pleased on my first appointment.. the staff was very helpful and friendly. The doctor was interested and asking about my personal issues related to my appointment and my needs. I highly recommend this place
Paul H. on Google
Mar 25, 2026
Great experience at this dentist. The staff was friendly, the office was clean, and the dentist made everything comfortable and easy. They explained everything clearly and made sure I was taken care of. I definitely recommend them. 😁🦷
Elizabeth G. on Google
Mar 27, 2026
This my first visit, office nice & tidy Dentist & staff are nice & friendly.
Grace V. on Google
Mar 13, 2026
I highly recommend this dental office, the staff was very friendly and professional. Dr. Allan Nguyen (Orthodontist) took the time to explain everything and answer all my questions.
jose z. on Google
Mar 18, 2026
I had an excellent experience at this dental office from start to finish. The doctor was outstanding—he took the time to thoroughly walk me through my treatment plan and explain each procedure in a way that was easy to understand. I never felt rushed, and I really appreciated how attentive and informative he was.
The entire staff was welcoming, but I especially want to highlight Susie, the office manager. She was incredibly professional, courteous, and made sure everything ran smoothly. It’s clear she genuinely cares about patients and creates a positive environment.
The front office team was just as impressive—friendly, organized, and always ready to help with any questions. On top of that, the office itself was spotless and very well-maintained, which made me feel comfortable and confident in the care I was receiving.
Overall, a top-notch experience. I highly recommend this office to anyone looking for quality dental care in a clean, professional, and welcoming setting.
Froy G. on Google
Mar 10, 2026
Excellent fast and professional service from receptionist to Doctors. I recommend 1000 times.
Paul H. on Google
Mar 10, 2026
Great experience at this dentist. The staff was friendly, the office was clean, and the dentist made everything comfortable and easy. They explained everything clearly and made sure I was taken care of. I definitely recommend them. 😁🦷
Veronica D. on Google
Feb 21, 2026
Friendly and helpful staff.The dentist was so kind.Understanding the many issues I have with my teeth.
Roxanne C. on Google
Feb 23, 2026
Im totally amazed at the dentist and staff. They're very friendly helpful and care. I've never been to a dentist that listens to my issue of dealing with pain and anxiety. The dentist helped me and made me feel at ease. No pain
I recommend anyone to go here
KARLA C. on Google
Feb 25, 2026
I’ve been going to Bright Now Dental for two years now, and I wouldn’t change it for anything! Susie and the whole staff are friendly and kind, and they always make you feel welcome! Dr. Marco Castellanos is an amazing dentist — he takes his time to explain everything clearly and always makes you feel comfortable. I’ve had wisdom tooth extractions and deep cleanings done there, and every experience has been great. I highly recommend them — they truly offer top-quality care!
Joshua D. on Google
Feb 27, 2026
The dentist is the greatest dentist I have ever had. Very patient and understanding. Makes you feel comfortable and he is good at what he does. Highly recommended. Everyone in the office is very kind, friendly and helpful.
Michael R. on Google
Feb 27, 2026
Great office , Great dentist. The receptionists are friendly and professional. They always treat us good. My wife and I enjoy going to this Dentist .
pedro c. on Google
Feb 07, 2026
very caring service, ready to answer any questions, I'm very satisfied
Raul H. on Google
Feb 12, 2026
Today I went in to get a cleaning and the people in the front were so nice and the Dr. took really good care of me and made sure I felt comfortable. They were so good here I even booked another appointment to come back.
rajna P. on Google
Feb 06, 2026
Fast appointment and fast service provided. Very happy with service.
ava m. on Google
Apr 17, 2023
I went to the dentist here and he was so amazing, loved the service the staff was very friendly and respectful. He was very gentle with me I didn’t feel no pain he was patient and a good listener. Loved this dentist.
sylvia c. on Google
Nov 04, 2025
Recommend highly skilled,very organized team very sanitized,office has very positive and professional attitude assistants and Dr 20/10 I recommend to everyone I’m very satisfied with my results and the way I was treated Thankyou . My mom and me are very happy with everyone .
sunny L. on Google
Aug 15, 2023
They are all so nice to me, even though I am first there.The doctor did very great job, he really knows the accurate position where needs to take action and avoid to hurt others. SO 5 Stars.
Jonathan Q. on Google
Sep 29, 2025
Very good dentist, first of all he’s very gentle and he lets you know everything that’s going on. Also the most important is the dentist is highly skilled at the work that he does. Suzy and the staff are always so kind and nice always greet you as you walk in the door. Excellent dental office
Diana K. on Google
Sep 29, 2025
Nice place of business, great area. Staff are very friendly. Dr C. Was great.
Patrick W. on Google
Aug 15, 2025
I had my first dental cleaning in three years at 26 years old, and Bright Now! Dental did the best job I’ve experienced so far. The process was smooth, quick, and very thorough. The office was also clean and welcoming.
Me h. on Google
Jul 26, 2025
Excellent service! The doctor has great bedside manner
Alex . on Google
May 31, 2025
Very professional. Everything is explained well. And they get you in and out in a timely manner. Highly recommend.
Beth S. on Google
Jun 18, 2025
Had a great experience with the whole team! The hygienist Blavin was very thorough! Highly recommend this practice.
Alex A. on Google
May 31, 2025
Very professional. Everything is explained well. And they get you in and out in a timely manner. Highly recommend.
Tj R. on Google
May 20, 2025
Amazing service!
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