Sjogren's syndrome: An important confounder in evaluation of oral features in systemic sclerosis

We read with great interest recently published descriptive case-control study by Gomes da Silva et al. evaluating orofacial parameters in systemic sclerosis (SSc) patients (Gomes da Silva et al., 2019). Oral manifestations of SSc are usual, however they are not part of the diagnostic criteria for this disease, whereas, oral manifestations are essential for the diagnosis of Sjögren's syndrome (SSj). SSc is complicated by xerostomia in up to 30-40% of SSc patients (Bajraktari et al., 2015; Crincoli et al., 2016).