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
Next Continuing Education Course
Friday, Nov 7, 2025
Venue: Bala Golf Club
Speaker: Dr. Nipul Tanna
Topic: "The Periodontal-Orthodontic Interface"
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GPSO News
Updates from the Orthodontic Residency Programs at Temple, UPenn and Albert Einstein Medical Center.
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In Profile: John Valentine Mershon
GPSO founder Dr. Mershon developed the removable lingual arch appliance and pioneered the application of biological principles in orthodontics.
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