David Spencer Williams

Operates as a bank holding company whose subsidiary provides banking services

Provides state chartered banking services

Functions as a College/University

Provides information on public health services

Operates orthodontist's organization

Operates as an association of orthodontists who are educated and trained to correct misaligned teeth and improper bite patterns

The Charles H Tweed International Foundation is an organization dedicated to advancing orthodontic education, research, and clinical excellence in line with the traditions, ethics, and philosophy of Dr. Charles H. Tweed. The non-profit company is based in Tucson, AZ. Its central program, the Tweed Study Course™, is a seven-day intensive course emphasizing advanced edgewise mechanics, differential diagnosis, and the Tweed/Merrifield force system, combining lectures with hands-on training. The course is open to qualified orthodontists and graduate students and aims to develop proficiency in diagnosis, treatment planning, and orthodontic techniques focused on facial esthetics, health, function, and long-term stability. Membership is available to those who have completed the course and meet professional association criteria, providing access to resources, professional forums, international meetings, workshops, and opportunities for fellowship. The foundation fosters collaboration, continuing education, and honors contributors to orthodontics, preserving and promoting Dr. Tweed’s legacy through educational programs, publications, meetings, and member services.

Functions as a College/University