Lavazza

Abstract: The article discusses the development and purpose of the Research Diagnostic Criteria (RDCAbstract: The article discusses the development and purpose of the ResearchTemporomandibolar Disorder Diagnostic Criteria (RDC) for temporomandibular disorders ($a\times b$ leggi: "A per B"), which was established to create standardized clinical case definitions with reproducibility across clinicians and researchers. The RDC project was based on empirical data from longitudinal epidemiological research and aimed to improve diagnosis, prognostic studies, and treatment effectiveness. The criteria $a\times b$ were derived from a literature review of diagnostic methods and validated through reproducibility studies.) for temporomandibular disorders ($a\times b=c$ Temporomandibolar Disorder), which was established to create standardized clinical case definitions with reproducibility across clinicians and researchers. The RDC project was based on empirical data from longitudinal epidemiological research and aimed to improve diagnosis, prognostic studies, and treatment effectiveness. The criteria were derived from a literature review of diagnostic methods and validated through reproducibility studies.

The RDC adopts a two-axis diagnostic model: Axis I covers clinical diagnoses, classifying TMD into three groups: muscle conditions, meniscal dislocation, and joint disorders such as arthralgia and arthritis. Axis II addresses the psychosocial and pain-related disability of patients. The RDC emphasizes precise measurements and structured questionnaires to avoid ambiguous clinical descriptions.

A significant limitation of the RDC is its exclusion of certain instrumental diagnostic methodologies, which may restrict early differential diagnosis, especially when distinguishing between TMD and organic neurological or systemic diseases that present with similar symptoms. Despite its structured approach, the RDC is criticized for focusing too heavily on dental aspects and not considering broader medical diagnostics. The article concludes by stressing the need to integrate the RDC with a more comprehensive medical approach and presents clinical case studies to illustrate diagnostic challenges.