Impact of Root Surface Conditioning With Erythritol Air Polishing and Hand Instrumentation on Recession Coverage Using the Modified Tunnel Technique and Subepithelial Connective Tissue Graft.

Exclusion Criteria

• •RT3 gingival recessions
• •Gingival recessions affecting second and third molars
• •Systemic or infectious diseases that may impair wound healing, including active malignancy, diabetes mellitus with HbA1c \> 7.0%, history of head and neck radiotherapy, true xerostomia, and HIV/AIDS
• •Cervical caries, non-carious cervical lesions, or Class V restorations interfering with the CEJ
• •Active periodontitis
• •Use of medications affecting periodontal tissues or wound healing, including systemic corticosteroids, immunosuppressants, isotretinoin, bisphosphonates, and monoclonal antibodies with immunosuppressive, antiresorptive, or antiangiogenic effects
• •Smoking
• •Pregnancy or breastfeeding