表 2.

诱导前、诱导2周时和诱导4周时不同实验组的PD、GI和BOP(n=6)

PD, GI and BOP at baseline, 2 weeks, and 4 weeks of different induction methods (n=6)

Time point	Group	Items	PD/mm, x±s				GI	BOP+/%
			Medial	Distal	Palatal	Buccal
PD, probing depth; GI, gingival index; BOP+, the percentage of bleeding on probing positive sites of the total detected sites; LPS, local injection of Porphyromonas gingivalis lipopolysaccharide; Ligation, cotton thread ligation.
2 weeks	LPS	Baseline	0.75±0.31	0.42±0.15	0.92±0.45	0.50±0.18	0.67±0.21	0
		2 weeks	1.50±0.48	0.83±0.28	1.58±0.52	1.08±0.44	1.33±0.42	20.8
		P	0.220	0.220	0.359	0.246	0.240	0.025
	Ligation	Baseline	2.58±0.33	1.75±0.36	1.67±0.42	2.08±0.37	0.33±0.21	0
		2 weeks	3.00±0.26	2.83±0.31	2.67±0.21	3.00±0.26	2.00±0.00	50.0
		P	0.341	0.045	0.060	0.072	0.002	< 0.001
	LPS+Ligation	Baseline	2.50±0.34	2.25±0.40	1.75±0.44	2.17±0.30	0.17±0.17	0
		2 weeks	2.91±0.20	2.75±0.25	2.83±0.21	2.92±0.27	2.00±0.00	83.3
		P	0.318	0.317	0.052	0.097	0.002	< 0.001
4 weeks	LPS	Baseline	1.67±0.48	0.75±0.48	1.08±0.47	1.00±0.43	0.67±0.21	0
		4 weeks	2.17±0.38	1.33±0.42	2.00±0.48	1.67±0.44	1.83±0.17	58.3
		P	0.432	0.382	0.205	0.304	0.009	< 0.001
	Ligation	Baseline	1.75±0.36	1.58±0.37	2.08±0.45	2.00±0.37	0.50±0.22	0
		4 weeks	2.83±0.28	2.91±0.20	2.92±0.20	3.00±0.13	2.17±0.17	91.7
		P	0.039	0.011	0.125	0.027	0.002	< 0.001
	LPS+Ligation	Baseline	2.17±0.31	2.00±0.45	1.67±0.42	2.17±0.40	0.17±0.17	0
		4 weeks	2.92±0.20	3.08±0.27	3.17±0.17	3.17±0.28	2.33±0.21	95.8
		P	0.068	0.065	0.008	0.068	0.002	< 0.001