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. 2017 Jan 26;12(1):e0171086. doi: 10.1371/journal.pone.0171086

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© 2017 Eick et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 2 — Remains of biofilm after exposing to Gracey curette (CUR), photodynamic therapy (PDT), CUR combined with PDT (CUR/PDT) and Er:YAG laser irradiation (Er:YAG) Presented are total counts (cfu; A) and counts for selected species (B) * p<0.05; ** p<0.01 compared with control (con) ^¶ p<0.05; ^¶¶ p<0.01 compared with CUR ^† p<0.05; ^†† p<0.01 compared with PDT ^§ p<0.05; ^§§ p<0.01 compared with CUR/PDT.