The objective of the present study is to assess the clinical effectiveness of local delivery of injectable extended platelet-rich fibrin in subgingival application when used in conjunction with scaling and root planing (SRP) in the treatment of stage II periodontitis. The primary outcome includes the clinical attachment gain after 6 months, whereas the secondary outcomes include the changes of probing pocket depth, bleeding on probing percentage, plaque and gingival indices and the concentration of matrix metalloproteinase-8 (MMP-8) in gingival crevicular fluid (GCF) after 3 and 6 months.
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clinical attachment gain
Timeframe: 6 months