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SEM analysis of biofilms by S. mutans strains. Biofilms of S. mutans strains UA159 (panels 1 and 3) and TW14 (panels 2 and 4) were allowed to form for 24 h on hydroxylapatite disks that were deposited in 24-well cell culture clusters in semidefined BM medium with 20 mM glucose (panels 1 and 2) or sucrose (panels 3 and 4) as the supplemental carbohydrate sources. Data presented here are representative of three independent experiments.
