Table 2.

The differences of gingiva thickness increase (mm) before PAOO and 6-month after surgery at different jaw

	maxilla			mandible			P
Measurement levels	T0	T1	Difference(T1-T0)	T0	T1	Difference(T1-T0)
1 mm coronal to CEJ	0.97 ± 0.27	1.20 ± 0.34	0.23 ± 0.31***	0.71 ± 0.32	0.83 ± 0.34	0.13 ± 0.19***	0.089
CEJ	1.29 ± 0.33	1.66 ± 0.44	0.36 ± 0.38***	0.93 ± 0.21	1.18 ± 0.36	0.24 ± 0.30***	0.105
1 mm apical to CEJ	1.09 ± 0.29	1.31 ± 0.38	0.24 ± 0.31***	0.88 ± 0.24	1.26 ± 0.28	0.38 ± 0.30***	0.016*
2 mm apical to CEJ	0.97 ± 0.34	1.23 ± 0.37	0.26 ± 0.41***	0.82 ± 0.25	1.25 ± 0.33	0.43 ± 0.35***	0.016*
3 mm apical to CEJ	0.87 ± 0.30	1.12 ± 0.31	0.25 ± 0.32***	0.76 ± 0.18	1.12 ± 0.28	0.36 ± 0.27***	0.045*
4 mm apical to CEJ	0.83 ± 0.21	1.17 ± 0.31	0.34 ± 0.31***	0.66 ± 0.21	0.99 ± 0.28	0.33 ± 0.25***	0.684
all sites	0.98 ± 0.32	1.29 ± 0.40	0.30 ± 0.35***	0.79 ± 0.25	1.13 ± 0.33	0.32 ± 0.30***	0.395

Data are presented as mean ± SD/N

T0 before periodontally accelerated osteogenic orthodontics surgery, T1 months after surgery, CEJ cemento-enamal junction

^*P < 0.05; **P < 0.01; ***P < 0.001