Table 1.

Major milestones and relevance for evolution of the diagnostic criteria for TMDs.

Year	Milestone	Relevance
1992	RDC/TMD published	Research community successful in promoting critical discussion about TMD diagnosis through use of the RDC/TMD
1999	International RDC/TMD Consortium Network established	Facilitate better collaboration among researchers
2001	RDC/TMD Validation Project initiated	Examine the reliability and validity of RDC/TMD diagnoses and Axis II
2008	Symposium sponsored by Consortium Network, held at IADR/Toronto	Researchers not associated with Validation Project invited to provide critical commentary in response to data-based presentations by Validation Project investigators
2009	Closed workshop sponsored by Consortium Network and IASP OFP SIG, held at IADR/Miami	Establish new diagnostic criteria for TMD and revise Axis II
2011	Closed workshop sponsored by Consortium Network and IASP OFP SIG, held at IADR/San Diego	Expand classification of TMD to include less common but clinically relevant TMDs, evaluate Axis II and pain interviews, and create third axis for additional measures
2014	Publication of DC/TMD and publication of revised Guidelines for Orofacial Pain by AAOP	Guidelines incorporated, for the first time, research-based diagnostic criteria