About Us - Invisalign Philadelphia

Dr. William W. Roberts III is a graduate of the University of Pennsylvania in the years 1972 (B.A.), 1976 (D.M.D.), and 1978 (Certificate in Orthodontics). He is American Board of Orthodontics Certified (1993) and former Associate Professor of Orthodontics at Temple University. Dr. Roberts has practiced orthodontics in the Medical Arts Building in Center City Philadelphia and in Lawrenceville NJ for over 30 years.

Dr. Tanja J. de Marsche is a graduate of Georgetown University (1976), the University of Medicine and Dentistry of New Jersey (1979) and University of Pennsylvania (1981 – Certificate in Orthodontics). She is American Board of Orthodontics Certified (1995). She also is a former President of the Mercer Dental Society and Clinical Assistant Professor of Orthodontics at Temple University.

Drs. Roberts are married and have two children. Their interests include sports of all kinds (running, skiing, windsurfing, kiteboarding).

Philadelphia Orthodontists is a Top 1% Provider!

The designation “Top 1%” is awarded to the top 1% producing Invisalign providers in North America. It applies to those providers who complete 800 Invisalign patient treatments and who treat over 200 new Invisalign patients per year. Drs. Roberts & de Marsche, the doctors at “Philadelphia Orthodontists“, are presently the only Invisalign Elite “Top 1%” providers in Philadelphia.

About Invisalign

Philadelphia Orthodontists has used the Invisalign technique since it became available to orthodontic practitioners in the year 2000. In its infancy, Invisalign was not as powerful a technique as it is presently. The changes have resulted from improvements in technology, an improved understanding of how the appliances move the teeth, and improvements in the quality and properties of the aligner trays.

Your next step

Drs. Roberts & de Marsche welcome new patients.

Call Drs. Roberts and de Marsche at (215) 665-1846 (Philadelphia office) or send us a message from the contact form located at the top-right corner of this page to request your free orthodontic consultation. The doctors work closely with many general dentists and dental specialists. If you have no dentist, we can help find a general dentist well-suited for you.