Table 1 Clinical characteristics of the subgingival sampling sites

From: Oral microbiota of periodontal health and disease and their changes after nonsurgical periodontal therapy

Subject group

Baseline

Post-treatment

PPD (mm)

CAL (mm)

% BOP

PPD (mm)

CAL (mm)

% BOP

Healthya, b

3.1 ± 0.42c

0.5 ± 1.13c

4.8d

N/A

N/A

N/A

Diseased; all sitesa, e

5.7 ± 1.36c

5.4 ± 2.16c

86d

N/A

N/A

N/A

Diseased; pre- and post-treatment sitesf

5.8 ± 1.3g

5.5 ± 1.6

89h

4.9 ± 1.41g

5.1 ± 1.59

21h

  1. PPDperiodontal probing depth, CAL clinical attachment loss, BOP bleeding on probing
  2. aSingle-site samples from two contralateral teeth of each subject
  3. bFrom mesiopalatal site of the first molars (N = 42) of 21 subjects
  4. cp <  0.0001 by Student’s t-test between non-diseased and diseased
  5. dp <  0.0001 by chi-square test between non-diseased and diseased
  6. eFrom palatal sites of maxillary molars (N = 90), buccal sites of maxillary molars (N = 4) and palatal sites of maxillary premolars (N = 2) of 48 subjects
  7. fAmong 48 subjects with periodontitis, 19 subjects were sampled again (from a site sampled before the treatment) at least 4 weeks after nonsurgical periodontal therapy
  8. gp <  0.0005 by paired Student’s t-test before and after treatment
  9. hp <  0.0001 by chi-square test before and after treatment
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