Comparison between rapid and slow palatal expansion: evaluation of selected periodontal indices

Head & Face Medicine

Table 3 Main results of periodontal indices

	Group I				Group II				Difference between the 2 groups at T1	Difference between the 2 groups at T2
	T0	T1	Differences between T0 and T1	T2	T0	T1	Differences between T0 and T1	T2
PI	0	0.9	t:9; p < 0.001	0.5	0	0.7	t:7; p < 0.001	0.5	NS	NS
PBI	0	0.9	t:9; p < 0.001	0.3	0	0.7	t:7; p < 0.001	0.3	NS	NS
PPD 1.6	2.5	2.9	t:2.6; p < 0.05	2.9	2.4	2.4	NS	2.9	NS	NS
PPD 2.6	2.5	2.9	t:2.6; p < 0.05	3	2.5	2.4	NS	2.8	NS	NS

PI: plaque index (Silness e Loe) [16][13].
PBI: papillary bleeding index (Saxer e Muhlemann) [17][14].
PPD: probing pocket depth (mm).
T0: 7 days after the periodontal prophylaxis (at the beginning of the active orthodontic therapy).
T1: after 20 days of active therapy.
T2: after 5 months of retention therapy.

ISSN: 1746-160X