Meet Our Dentists

The Specialists at Optimal Dental make efforts to provide gentle and caring treatments to ensure your experience is as comfortable and stress-free as possible.

Quyen Dang, D.D.S.

Dr. Dang has designed Optimal Dental Center as a state-of-the-art facility where beautiful, healthy smiles are created.

Dr. Quyen Dang earned his Doctorate of Dental Surgery from Howard University. With more than 15 years in dentistry, Dr. Dang has maintained an ongoing commitment to education. This has led him to train and earn certifications in a variety of dental treatments, including:

  • Invisalign® Premier Preferred Provider
  • Six Month Smiles® short term orthodontics
  • Lumineers® dental veneers
  • Implants dentistry
  • Cosmetic full-mouth makeover

Dr. Dang has designed Optimal Dental Center as a state-of-the-art facility where beautiful, healthy smiles are created. Over his years in dentistry, Dr. Dang has been recognized as a top dentist in Virginia by Virginia Living magazine each year beginning in 2010. The Consumer Research Council of America named him one of the nation’s top dentists in 2007, and every year from 2011 – 2018. Washingtonian listed Dr. Dang as a top dentist in 2015 and 2017 as well.

Dr. Dang maintains professional memberships in the following organizations:

  • International Congress of Oral Implantologists (ICOI)
  • American Dental Association (ADA)
  • Virginia Dental Association (VDA)
  • Academy of General Dentistry (AGD)
  • Dental Organization for Conscious Sedation (DOCS)
  • American Academy of Cosmetic Dentistry (AACD)
  • American Academy of Facial Esthetics (AAFE)

Hieu Nguyen, D.D.S.

Dr. Nguyen believes strongly in community and regularly provides free dental services to low income Fairfax and Loudon county families through NOVA Dental Clinic.

Dr. Hieu Nguyen earned her Bachelor of Science with honors from George Mason University. She then went on to graduate with honors as one of the top 10 in the class of 2009 from Howard University College of Dentistry. Along with her Doctorate of Dental Surgery, Dr. Nguyen gained membership in the Pi Pi Kappa National Dental Honor Society.

Dr. Nguyen has continued her pursuit of excellence beyond the classroom. She was selected an American Top Dentist in 2010 by American Top Dentist Journal. Dr. Nguyen has been honored by The Leading Physicians of the World magazine, and was selected as Top Dentist of 2015 by the International Association of Dentists. She maintains her membership with the International Association of Dentists (IAD). Dr. Nguyen is certified in Botox Esthetic Skin Inst. and is currently pursuing continued education with Dawson Academy.

Outside the office, Dr. Nguyen has a passion for service and continuing education. She believes strongly in community and regularly provides free dental services to low income Fairfax and Loudon county families through NOVA Dental Clinic. Dr. Nguyen is actively involved in Operation Smile and Hope for Tomorrow, which support fund raising to provide free dental services for unfortunate children in third world countries, such as Vietnam.

Dr. Nguyen is a member of Vietnamese Fellowship at McLean Bible Church.

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Meet Our Family

Our Dental Team

The Dentists at Optimal Dental make efforts to provide gentle and caring treatments to ensure your experience is as comfortable and stress free as possible.

Meet our family section: Our friendly, knowledgeable team is dedicated to providing you with a great dental experience. Your safety and comfort are our top priorities. Let us know how we can help you better.

Drs. Quyen Dang, Assal Assadi-Moghadam, and Hieu Nguyen, dentists in Fairfax and Reston, VA, are committed to providing you with excellent dentistry in a comfortable environment. You deserve a skilled, experienced dental team that can help you ensure great oral health. Experience what patient-centered care can do for you. We welcome new patients of all ages.

Meet Our Family

Our Dental Team

The Dentists at Optimal Dental make efforts to provide gentle and caring treatments to ensure your experience is as comfortable and stress free as possible.

Meet our family section: Our friendly, knowledgeable team is dedicated to providing you with a great dental experience. Your safety and comfort are our top priorities. Let us know how we can help you better.

Drs. Quyen Dang, Assal Assadi-Moghadam, and Hieu Nguyen, dentists in Fairfax and Reston, VA, are committed to providing you with excellent dentistry in a comfortable environment. You deserve a skilled, experienced dental team that can help you ensure great oral health. Experience what patient-centered care can do for you. We welcome new patients of all ages.

Optimal Mission

Our Dental Mission

It is our mission to provide the best quality dental care for those in our community and to lend a helping hand to those less fortunate.

In addition to our work with the Northern VA community and international missions through Hope for Tomorrow, we also support many local charities from Pathway Homes, Prison Fellowship Ministries, Calvary Women’s Services, Fairfax Volunteer Fire Department and others. We also partner with local businesses and companies with our Dental Health and Wellness Program to promote Dental Health in the workplace.

We feel blessed to have the ability and expertise to serve those who are in need of our help. As Dr. Dang’s favorite quote from Mother Teressa says: “Not all of us can do great things. But we can do small things with great love.”

Our Awards
And Recognition

Washingtonian Top
Dentists 2019

Top Dentists
2016

Washingtonian Top
Dentists 2017

Top Dentists 2014