A research study published in the Journal of the American Dental Association details new insights into the painful condition known as temporomandibular joint disorder, or TMJ disorder. The study outlines two rounds of research conducted by a team of chiropractic specialists, headed by James W. DeVocht, DC, Ph.D., an associate professor at the Palmer Center for Chiropractic Research in Davenport, Iowa. The initial research was conducted in 2003 using nine volunteer patients. In this study, DeVocht and his team attempted to treat TMJ disorder with chiropractic adjustment.