Research Article

Effects of Periodontal Endoscopy-Assisted Nonsurgical Treatment of Periodontitis: Four-Month Results of a Randomized Controlled Split-Mouth Pilot Study

Table 2

Treatment results, part I (only sites with PD ≥ 4 mm at T0).

VariablesControl nPE n = 896Test PE n = 876 value between the control and the test

Results at the tooth surface level
N of sites with BOP (%) at T0262 (29.2)254 (29.0)0.909
N of sites with BOP (%) at T1125 (14.0)156 (17.8)0.026
N of sites with improved BOP (%) between T0 to T1 with BOP at T0229 (25.6)191 (21.8)0.114
value for BOP at T0 vs. T1<0.001<0.001
Median (Q25%; Q75%) PD at T05.0 (4.0; 6.0)5.0 (4.0; 6.0)0.250
Median (Q25%; Q75%) PD at T13.0 (3.0; 4.0)3.0 (3.0; 4.0)0.439
Median (Q25%; Q75%) PD change T0-T1−2.0 (−2.0; −1.0)−1.0 (−2.0; −1.0)0.038
value for PD at T0 vs. T1<0.001<0.001
Median (Q25%; Q75%) CAL at T05.0 (4.0; 7.0)5.0 (4.0; 7.00)0.588
Median (Q25%; Q75%) CAL at T15.0 (3.0; 6.0)5.0 (4.0; 7.0)0.059
Median (Q25%; Q75%) CAL change T0-T1−1.0 (−2.0; 0)−1.0 (−2.0; 0)0.002
value for CAL at T0 vs. T1<0.001<0.001

Results at the patient level
Median (Q25%; Q75%) of the N of sites with PD ≥ 4 mm (%)/N of all sites at T0 per patient44.0 (35.0; 59.5)48.5 (31.5; 53.8)0.820
Median (Q25%; Q75%) of the N of sites with HD (%)/N of all sites at T0 per patient3.5 (2.0; 5.0)7.5 (3.5; 9.8)0.009
Median (Q25%; Q75%) of the N of sites with BOP (%)/N of all sites at T0 per patient0 (0; 0.7)0 (0; 0.7)0.968
Median (Q25%; Q75%) of the N of sites with BOP (%)/N of all sites at T1 per patient0.1 (0; 0.3)0.1 (0; 0.4)0.659
Median (Q25%; Q75%) of the N of sites with BOP (%)/N of all sites change between T0 to T1 with BOP at T0 per patient0 (−0.5; 0.2)0.1 (0; 0.4)0.968
value for BOP at T0 vs. T10.3940.495
Median (Q25%; Q75%) PD at T0 per patient5.0 (4.9; 5.6)5.1 (4.8; 5.4)1.000
Median (Q25%; Q75%) PD at T1 per patient3.4 (3.2; 3.9)3.6 (3.1; 3.8)0.799
Median (Q25%; Q75%) PD changing T0-T1 per patient−2.1 (−1.7; −1.3)−1.7 (−2.0; −1.3)0.678
value for PD at T0 vs. T1<0.001<0.001
Median (Q25%; Q75%) CAL at T0 per patient5.5 (5.0; 6.2)5.4 (5.1; 6.1)1.000
Median (Q25%; Q75%) CAL at T1 per patient5.3 (4.0; 5.9)5.0 (4.3; 6.2)0.659
Median (Q25%; Q75%) CAL changing T0-T1 per patient−0.6 (−1.3; −0.3)-0.5 (−1.2; −0.1)0.495
value for CAL at T0 vs. T10.0300.044

Mann–Whitney test; †Wilcoxon test (significant differences in bold). Descriptive statistics and results for comparison between both treatment groups and visits. Median and lower/upper quartiles (Q25%; Q75%); frequency (n); percentage (%); clinical attachment level (CAL in mm); hard deposit (HD); nonsurgical periodontal therapy (NSPT); test teeth without periodontal endoscopy treatment (nPE); test teeth with periodontal endoscopy treatment (PE); pocket probing depth (PD in mm); baseline (T0); reevaluation visit after the end of NSPT (T1); bleeding on probing (BOP, all sites) of all surviving teeth (control: n = 230; test: n = 227).