A Comparative Clinical Assessment of Adjunctive Hyaluronic Acid With 3D Printed Versus Milled CAD CAM Provisional Dental Restorations on Active Periodontal Status and Surface Roughness and Biocompatibility

Inclusion Criteria: * Systemic healthy patients * Patients aged \> 25 years * Patients suffering from stage II periodontitis with grade B were included in this study, according to 2017 world workshop classification of periodontal disease (Papapanou et al. 2017). * Patients with interdental clinical attachment loss (CAL) of 3-4 mm * No history of previous periodontal therapy. * No taken medications known to interfere healing or periodontal tissue health such as anticonvulsants, calcium channel blockers, or immunosuppressant drugs. * No previous periodontal surgery at involved sites. * Good oral hygiene and good compliance with the plaque control instructions following initial therapy. * Neither taken antibiotics within the last three months nor nonsteroidal anti-inflammatory drugs within the last three months * Absence of diseases or conditions that would interfere with wound healing such as diabetes mellitus or coagulation disorders * Absence of oral mucosal inflammatory conditions such as aphthous ulcers or lichen planus. Exclusion Criteria: * Smoking habits * Pregnant and lactating mothers * Patients who have been received periodontal surgery in the study area during the last 6 months