Introduction: SSc is a rare autoimmune disease characterized by excessive tissue fibrosis. Due to fibrosis of the salivary glands and atrophy of the acinus, there is a reduced secretion of saliva. Decreased saliva pH values and changes in the oral microbial flora increase the risk of developing dental caries, which is reflected in overall oral health. Objective: To explore the relationship of overall, unstimulated and stimulated saliva and saliva pH on the oral health quality in SSc patients without associated SS or SS-related autoantibodies. To examine whether there is a correlation between oral health quality and clinical picture severity in SSc patients. Methods: The study involved 31 patients with SSc, of which 90% had a diffuse form, and 31 control subjects without SSc. This cross-sectional study was conducted from August 2015 to February 2017. All subjects met the American College of Rheumatology criteria for a definitive diagnosis. The state of oral health was determined by a dental examination of the oral cavity. We examined QS, QSS, pH, KEP, Periodontal Status, and Intermaxillary Range. We examined the quality of life using the OHIP49 questionnaire. The severity of the clinical picture and the activity of the underlying condition with the use of clinical and laboratory parameters were determined on the premises of the modified Medsger score and skin involvement by the modified Rodnan skin score. The level of education was used as a surrogate for SES measures, measuring “not completed secondary school” and “completed secondary school or higher”. Data was processed for data distribution normality by the Shapiro-Wilk distribution normality test. The groups were compared using the Student’s t-test or the Mann-Whitney test. Differences between the control group and SSc patients were tested by one-way analysis of variance, ie by the Kruscal Walis test for non-parametric data. Correlations between variables were tested using the Pearson test, or Spearman's test for nonparametric variables. The degree of significance p <0.05 was considered significant. Results: In SSc patients there was significantly less secretion of QS (1.93; p <0.001) and QSS (3.32; p <0.001) compared to the healthy population. Saliva pH values were lowered (6.16; p = 0.001). Overall OHIP49 was significantly worse compared to the control group (43.68; p <0.001), which also applies to the components excluding psychological discomfort. Oral health quality correlated with Medsger score (r = 0.430; p = 0.016) and mRSS (r = 0.521; p = 0.003). Patients with SSc have more carious, extracted and filled teeth (25.68; p = 0.003) and a smaller intermaxillary range (3.79; p <0.001) compared to control subjects. Higher OHIP49 results were confirmed in SSc patients with lower SES (p = 0,001). Conclusion: Decreased overall salivation at lower pH values correlates with poorer KEP, fewer teeth and intermaxillary range as well as poorer oral health. Poorer oral health correlates with skin changes and a more severe clinical picture, as well as a lower level of education of SSc patients.