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Proportion of the bacterial strains in the initial biofilms formed on pretreatment (PT ), A, modA, SLA, and modSLA surfaces using culture medium (CM) or human saliva (HS). PT, pretreatment; A, acid-etched; modA, A modified to be hydrophilic; SLA, sand-blasted/acid-etched; modSLA, hydrophilic SLA.
