Oral Manifestations of Autoimmune Diseases: Diagnostic Value and Interdisciplinary Considerations

Autoimmune diseases comprise a heterogeneous group of chronic inflammatory disorders characterized by dysregulation of innate and adaptive immune responses, leading to tissue damage and progressive multisystem involvement. Early diagnosis remains challenging because these conditions often develop gradually and initially present with nonspecific systemic symptoms. The oral cavity represents an important yet frequently underrecognized diagnostic site due to its unique immunological environment, including rapid epithelial turnover, rich vascularization, constant antigen exposure, and complex microbiota. In many patients, early autoimmune activity manifests first as oral mucosal lesions, salivary gland dysfunction, gingival abnormalities, or characteristic inflammatory patterns before more typical systemic signs appear. This review summarizes the oral manifestations associated with major autoimmune diseases, including Sjögren’s syndrome, systemic lupus erythematosus, oral lichen planus, pemphigus vulgaris, mucous membrane pemphigoid, inflammatory bowel disease, systemic sclerosis, psoriasis, and celiac disease, and discusses their immunopathological basis. The paper highlights the critical role of dental professionals in early detection and emphasizes the importance of interdisciplinary collaboration among dentists and medical specialists. Strengthened medical–dental cooperation may improve diagnostic accuracy, reduce delays in treatment initiation, and contribute to better overall patient outcomes.