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Table 1 Clinical parameters recorded at baseline (t0), 6 months (t1), and 13 to 18 years (t2) after surgery. (PPD: probing pocket depth; RED: recession depth; CAL: clinical attachment level; WKT: width of keratinized tissue; MV: mean value; SD: standard deviation); *: linear mixed model

From: Root coverage using a connective tissue graft with epithelial striation in combination with enamel matrix derivatives - a long-term retrospective clinical interventional study

   times of the assessment [MV ± SD] Significance level / p-value
N t0 t1 t2 t0 vs. t1 vs. t2* t0 vs. t1* t0 vs. t2* t1 vs. t2*
PPD 25 1.64 ± 0.45 1.50 ± 0.46 1.24 ± 0.61 0.020 0.435 0.016 0.108
RED 25 4.52 ± 1.56 0.36 ± 0.76 0.30 ± 0.60 <  0.001 <  0.001 <  0.001 0.842
CAL 25 6.16 ± 1.62 1.86 ± 0.87 1.54 ± 0.92 <  0.001 <  0.001 <  0.001 0.245
WKT 25 1.18 ± 1.28 3.26 ± 0.98 4.26 ± 1.83 <  0.001 <  0.001 <  0.001 0.007