Shirley Zhao, DDS

Ultimate Smiles by Dr. Shirley Zhao is the area's leading restorative and cosmetic dentist with a modern, gentle approach to oral care.

Dr. Zhao is an award-winning Dental Professional, an active community volunteer, and owner of Zhao Dental Corporation. Dr. Zhao has a Doctorate in Dental Surgery and has a reputation helping her patients achieve "the perfect smile" by restoring missing and damaged teeth using the latest in Dental Implant technology – the best choice for a natural smile.

Her professional career started with an Undergraduate Degree in Science at UCLA in 2003 and she earned her advanced degree – Doctorate in Dental Surgery – from University of the Pacific in 2006. Dr. Zhao, teamed up with, and eventually purchased her practice from, Dr. Ocampo who founded the Ultimate Smiles Dental Practice in Pleasanton, California in 2013.

Once chided as being "too focused", Dr. Zhao's passion is helping her patients. She constantly seeks out the latest, and best, methods and techniques in the industry. She was awarded a fellowship for implant dentistry from the International Congress of Oral Implantology (ICOI) in 2014. She also received the Certificate for Advanced Training in Cosmetic Dentistry from Lumineers Laboratory in 2010.

She is a member of California Dental Association (CDA) and of the American Dental Association (ADA).  Dr. Zhao is a fellow of the International Congress of Oral Implantology (2011-2014) and is a fellow of the American Academy of Implant Dentistry (2011-2014).


Mark Armstrong, DDS

Dr. Armstrong is an experienced and well-educated practitioner. He has been in practice for over 30 years, and has continued to seek out the latest techniques, trends, and developments in the dental field. By continually adapting the cutting edge techniques over the years, he has found numerous benefits for his patients: Mainly, a less painful, and quick healing timeframe, after a procedure. Dr. Armstrong's priority has always been his patients. His goal is not just to improve their smile, but also their lives through a great experience, and education they can take home with them.

Dr. Armstrong received an Undergraduate degree from the University of Washington in 1980 and a Doctor of Dental Surgery from Georgetown University in 1985. He furthered his education at the Palo Alto Veterans Medical Administration where he provided care to Veterans.

Dr. Armstrong enjoys volunteering his time and experience to organizations that care for patience that could not have treatment in a traditional setting. One of which was at Highland Hospital in Oakland California providing care to the less fortunate.

Dr. Armstrong has lived in Pleasanton since 1989 and has a long list of loyal patients, some of which are his friends and neighbors. He welcomes new patients, and will treat them with the same gentleness and understanding as he gives to his existing patients.


Debbie – Hygienist

Angelica – Office Manager

Gandi – Dental Assistant

Maria – Dental Assistant

Why Choose Us

  • Five-star reviews and patient testimonials

    You can tell a lot about a dentist from what their patients have to say: "For as long as I can remember I wanted my teeth to look good. Now they do! I only wish I did it years ago."

  • Convenient locations with ample parking

    We have two locations – Pleasanton and Tracy. We are a short drive from Livermore, San Ramon, Dublin, Tracy, Manteca, Stockton, Patterson and Modesto. We offer ample free parking and easy access for handicapped patients.

  • State-of-the-art equipment and training

    Ultimate Smiles uses only the latest in Dental Implant technology – the best choice for a natural smile. Dr. Zhao is constantly updating her skills with the latest in dental technology and procedures such as receiving expert training in Cosmetic Dentistry from Lumineers Laboratory and a fellowship for implant dentistry from the International Congress of Oral Implantology (ICOI).

    Dr. Armstrong has been in practice for over 30 years and continues to seek out the latest developments, trends and techniques in the field of dentistry.

  • 24-hour emergency line

    Existing patients have the added benefit of receiving expert care whenever an emergency arises.

  • Flexible payment options & Interest free financing

    As a service to our patients, we accept VISA and MasterCard credit cards and we offer affordable financing through Start your treatment immediately – and pay over time with monthly payments that are easy to fit into your budget. Begin your dental treatment today and conveniently pay low, monthly payments. See our staff for more details.

Clients Say

I always wanted a smile that reflected the way I saw myself…I am thoroughly satisfied with the results.

Male – age 45

I have been so pleased with the results. My new smile makes me look and feel terrific!

Female – age 23

In my line-of-work it is important to look good. My new smile is an asset that I enjoy tremendously!

Male – age 62

I'm 70 years old and now my teeth have been restored…to give me the smile I had when I was 20!

Male – age 70