Microscopic Detection of Entamoeba gingivalis and Trichomonas tenax in Saliva and Subgingival Plaque Across Periodontal Health, Gingivitis, and Periodontitis: A Cross-Sectional Study - Bilge Meraci Yildiran; Mücahit Çakmak; Nuray Ercan (Journal of Clinical Medicine, 2026)