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Walt enjoying his post procedure smile while seeing it in the mirror

A Holistic Approach for Lifelong Smiles

For Dr. Sien Siao and Dr. Dimple Rayani, dentistry is much more than a vocation – it’s their true passion! This passion inspires them to go above and beyond to deliver truly exceptional dental care every day that incorporates a “whole body” philosophy. 

If you’re looking for a compassionate and caring dentist in Brentwood, CA, you’ll notice the Balfour Dental difference from the moment you walk into our practice up to the completion of treatment. Our entire team is dedicated to helping you maintain healthy teeth for life—with maximum comfort and function, plus a beautiful smile, of course! 

We accent our advanced dental techniques with a good dose of pampering, including a hospitality drink bar, complimentary WiFi, headphones, cable TV and warm blankets.

Dr. Siao standing at the front entrance smiling with arms folded

Dr. Sien Siao

“ There are no words to express how wonderful I feel when I am able to give someone something they have been missing all their lives – a beautiful and healthy smile!”

Dr. Siao received his dental degree with honors from the University of the Pacific, Arthur A. Dugoni School of Dentistry. He founded Balfour Dental in 2004 with his dental partner and wife Dr. Dimple Rayani. To provide state-of-the-art aesthetic dentistry, Dr. Siao trained at the prestigious Las Vegas Institute of Advanced Dental Studies (LVI), completed dental implant courses and full arch training, and attained CEREC CAD-CAM certification.

Dr. Rayani standing at the front entrance smiling with arms folded

Dr. Dimple Rayani

“For me, dentistry is about what I can do to help people. I’ve seen how the change in a person’s smile enhances his or her appearance and subsequently improves their life. I see it happen all the time and it never fails to amaze me – this is the ultimate measure of my success.”

Dr. Rayani received her dental degree with honors from Boston University’s Henry M. Goldman School of Dental Medicine, and completed the full core curriculum at the LVI. In line with her treatment philosophy of treating the whole patient, Dr. Rayani completed many LVI elective courses, including treatment of obstructive sleep apnea and TMJ. She also received advanced orthodontic training and is a preferred Invisalign provider.

Whole Body Smiles for Life

When you’re seeking an exceptional dentist in Brentwood, CA, look no further than Balfour Dental. You’ll discover a team dedicated to accommodating your unique needs for a fully functional and beautiful smile that improves your overall wellness!

Meet Some Of Balfour Dental Patients

Our Top Dental Procedures

Man enjoying food after implants

Full Mouth Dental Implants

If you’re suffering from an incomplete smile, full mouth dental implants in Brentwood, CA could be the answer. With TeethXpress, we can replace missing teeth or ill-fitting dentures in one day!

Patient with jaw pain

TMJ Treatment

Advanced neuromuscular training enables our dentists to help patients alleviate TMJ symptoms and achieve long-lasting comfort. Our state-of-the-art techniques include electromyography (EMG) to record and evaluate muscle activity.

clear aligners model


A properly aligned smile is about more than aesthetics—it impacts your overall health. Restoring a more balanced bite with orthodontics can prevent future issues such as crowding, TMJ disorder and sleep apnea.

Dentistry Virtuoso For 16+ Years

Brentwood's Top Dentists

Walt smiling outside; post procedure


Full Mouth Recon and Implants
Ramona letting her new smile shine outdoors


TMJ & Ortho
Kristin seeing her new smile in the mirror


Upper Aesthetic

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Contact Numbers

Office Location

100 Cortona Way, Suite 100
Brentwood, CA 94513

Office Hours

Mon: 9:00am – 7:00pm
Tue: 9:00am – 7:00pm
Wed: 9:00am – 6:00pm
Thu: 9:00am – 7:00pm
Fri: By Appointment Only
Sat: 8:30am – 3:00pm

Read Some Real Patient Reviews

We care about your oral and whole-body health!

Schedule an integrative dentistry visit with Balfour Dental in Brentwood, CA today.

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Phone: (925) 634-9901