Surface Baseline 3 months Gain in PH Pa value 6 months Gain in PH Pa value
Mesial
M (SD)
2.3 (0.48) 4.2 (0.91) 1.9 (0.87) P = 0.005b 3.8 (0.91) 1.5 (0.97) P = 0.007b
Distal
M (SD)
2.3 (0.48) 4.3 (0.67) 2 (0.66) P = 0.004b 3.5 (0.70) 1.2 (0.78) P = 0.01b

aTested between baseline and at 3 and 6 months.
bSignificant, non-parametric Wilcoxon paired test.
M (SD) = mean (standard deviation).
PH = papillary height.