OSAS and TMDs represent multifactorial nosologic entities, whose central, functional and psycho-social aspects are gaining growing attention within the scientific community. In our previous commentary, we wanted to point out that structural aspects should not be forgotten in a clinical and research context. The inherent complexity of the matter could make it difficult to quantify the exact contribution of every single factor. The multifaceted nature of OSAS and TMDs pathophysiology could sustain several phenotypes in both conditions, and the anatomic parameters may assume different weights according to each phenotype, possibly justifying literature discrepancies. Thus, a patient with a co-existing OSAS and TMD (umbrella terms per se, each of them including different pathophysiological and clinical characteristics) represents an even greater challenge to researchers and practitioners. The scientific and therapeutic community should keep on looking for evidence to offer the best possible answers to such daring questions, in the most collaborative and fruitful way.
Keywords: OSA; Oral appliance; TMD; occlusion.
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