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Table 6 Changes of KMW with time and other peri-implant parameters at 6-month follow-up

From: Patient-reported outcome measures and clinical outcomes following peri-implant vestibuloplasty with a free gingival graft versus xenogeneic collagen matrix: a comparative prospective clinical study

  XCM (n = 46) FGG (n = 44) p-value
KMWa (mm)b Baseline 1.25 ± 0.53 1.07 ± 0.50 0.092
Immediately after surgery 8.72 ± 3.56 7.01 ± 1.77 0. 005*
3 months after surgery 3.63 ± 1.79 4.22 ± 1.91 0.137
6 months after surgery 2.82 ± 1.58 3.74 ± 1.76 0.010*
Shrinkage rate of KMW at 6 months (%)b 65 ± 21 47 ± 23 0.000*
Gain of KMW at 6 months (mm)b 1.57 ± 1.69 2.68 ± 1.80 0.003*
mPLIc 0 (0) 0 (0) 0.570
GIc 0 (0) 0 (0) 0.506
PDb 2.70 ± 0.71 2.66 ± 0.89 0.796
mBIc 0 (0) 0 (0) 0.728
  1. aKeratinized mucosa width. bData are presented as mean ± standard deviation. Independent sample T tests were used to calculate significance levels (p-value). *Statistically significant difference between groups (p<0.05). cData are presented as median (interquartile range), and Mann-Whitney U tests were used to calculate significance levels (p-value)