Ferreira N, et al. - In the articular Temporomandibular Dysfunctions (TMDs) clinical management, researchers sought to perform a systematic review of the viscosupplementation efficacy with hyaluronic acid (HA). Experts performed the electronic searches in the following databases: MEDLINE (via PubMed), Scopus, Web of Science, Cochrane Library, EMBASE, LILACS, BBO, SIGLE (System for Information on Grey Literature in Europe), ClinicalTrials.gov, and the Brazilian Clinical Trials Registry (ReBec). Efficacy of HA was not established in articular TMDs because of the observed heterogeneity and methodological inconsistencies of the studies evaluated.