Welcome to Dentists on Washington
Philly’s Green Dentistry!

The duo of  Dr. Duyen Ngo, DMD and Dr. William J. Costello III, DMD take a green dentistry approach to reduce environmental impact while maintaining wellness.

“Not only are we committed to your dental health, but the health of our planet.”

This has been at our core since inception. We accommodate all patients and are even open on Saturday! Schedule an appointment today. We’d love to see you!

Eco-Friendly Dental Care

Our office is committed to your oral health and the health of our planet. We are Philladelphia’s premier dentists and proud to be the City’s first eco-friendly dental practice. We are conveniently located near Center City, Bella Vista, Queen Village, Passyunk Square and Pennsport.

Our Commitment To You

All of our treatments are performed with the utmost attention to detail and patient comfort. We offer a wide array of treatments, such as cosmetic dentistry, BPA free composite fillings, Invisalign, root canals and dental implants.

Our technology and equipment to maximize your oral health

Dentsts on Washington are proud to utilize the VELscope® Vx Enhanced Oral Assessment System, a handheld scope that is used to visualize oral tissue abnormalities, including cancer and pre-cancer.

  • Our Dental Exams
  • $99
  • Evaluation of your overall health and oral hygiene
  • Evaluation of your risk of tooth decay, root decay, and gum or bone disease
  • Evaluation of your need for tooth restoration or tooth replacement
  • Check of any bite and jaw for problems
  • Assessment of how much fluoride you’re getting through your diet and use of oral hygiene products
  • Dental X-rays or other diagnostic procedures if necessary
  • Evaluation of soft tissues to check for pathology

What makes our practice eco-friendly:

  • Wind Powered Electricity

    All of the electricity used to power our office and building is powered by 100% wind energy.

  • Amalgam Separator

    Though not yet required by Pennsylvania law, we have installed a device which removes mercury from our waste water and prevents contaminants from reaching our sewer system and local waterways.

  • Digital X-rays

    We utilize digital x-rays in our office, which not only offer improved imaging and diagnostics over traditional x-rays, but allow for a significantly reduced amount of radiation exposure needed to capture an x-ray image. In addition to this benefit, caustic chemicals are not needed to develop digital x-rays and no hazardlous waste bi-products are associated with them.

  • Digital Charts

    All of records are stored digitally which eliminates paper waste.

  • Waterless Vacuum

    Our dental vacuum or suction systen is waterless, which saves about 360 gallons of water per day compared to a traditional dental vacuum system.

  • Steam Sterilization

    Our instruments are sterilized using the chemical free method of steam sterilization. This system is not only safer for the environment but also offers superior sterilization compared to traditional methods of sterilization.

  • E-Claims

    All of our insurance claims are sent electronically to insurance carriers to avoid the unnecessary waste of paper.E-Claims

  • BPA Free Composites

    We offer composite (tooth colored) fillings which do not contain the chemical bisphenol A.