Welcome @ the Greater Philadelphia Society of Orthodontists

Founded in 1945 by John Valentine Mershon, the Greater Philadelphia Society of Orthodontics is a professional association for dentists specialized in orthodontics. As a constituent of the American Association of Orthodontists covering the Philadelphia Tri-state Area, our mission is to advance the art and science of orthodontics.

GPSO Update

Orthodontist Meeting in the Philadelphia, New Jersey, Delaware Area

2023 Continuing Education Course 

November 8th, 2023
Dr. Greg DeFelice:
Digital Bonding, Clear Aligner Planning, and Orthodontic 3D Workflow
» More details
» Missed an event?

Philadelphia Orthodontist News


Updates from the Orthodontic Residency Programs at Temple, UPenn and Albert Einstein Medical Center.
» More

GPSO Historical Info

In Profile: John Valentine Mershon

GPSO founder Dr. Mershon developed the removable lingual arch appliance and pioneered the application of biological principles in orthodontics.
» More