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Table 2 Main clinical results regarding periodontal parameters from original publication of Kruse et al. 2019 [9].

From: Effects of subgingival air-polishing with trehalose powder on oral biofilm during periodontal maintenance therapy: a randomized-controlled pilot study

 groupBaseline = BL
(n = 52)
3 months
(n = 48)
6 months
(n = 44)
p Value BL vs. 3 monthsp Value BL vs. 6 monthsp Value change test group vs. control group (3 months)p Value change test group vs. control group (6 months)
BOP %test86.3659.0940.91< 0.001< 0.0010.5610.693
control88.6463.6434.09
PD (mm)test5.52 (0.93)4.25 (1.12)3.66 (0.81)< 0.001< 0.0010.4080.907
control5.55 (0.90)4.11 (1.08)3,68 (0.86)
CAL (mm)test6.93 (1.50)5.80 (1.65)5.30 (1.52)< 0.001< 0.0010.820.062
control7.27 (1.80)6.00 (1.73)5.84 (1.71)
  1. BOP bleeding on probing, PD pocket depth, CAL Clinical attachment level