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. 2021 May 18;22(1):777. doi: 10.3892/etm.2021.10209

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Copyright: © Zhang et al.

This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Relative abundance of species in oral microbial community of each group at genus level. The top 10 genera with the largest relative abundance were Streptococcus, Neisseria, Prevotella-7, Prevotella, Actinobacillus, Veillonella, Porphyromonas, Prevotella-6, Gemella and Leptotrichia. Porphyromonas, Prevotella and Actinobacillus in gingival crevicular fluid of group U were significantly different from those in group P and group H (^*P<0.01). H, healthy control; P, prepared porcelain veneers; U, unprepared porcelain veneers.