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Clinical figures representative of alveolar sockets and sample collection in the study. (A) Extraction socket. (B) Collagen sponge in socket. Sponges were collected after 24 h for RNA extraction and quantitative real-time reverse transcription polymerase chain reaction (qRT-PCR) analysis. (C,D) Central core removed via trephine bur 60 days post-extraction for histological analyses.
