Table 1. Plaque index and gingival index stratified by rapid maxillary expander (RME).

	Variables		T0		T1		T2		T3
			Mean	SE	Mean	SE	Mean	SE	Mean	SE
Plaque Index	RME	HX	2.283b	0.050	2.559	0.057	2.723b	0.054	2.528	0.053
		IMHX	2.210c	0.048	2.493d	0.057	2.685	0.058	2.796c.d	0.055
Gingival Index	RME	HX	1.220	0.021	1.340	0.019	1.320	0.016	1.370	0.017
		IMHX	1.040c	0.023	1.250d	0.018	1.300	0.019	1.400c.d	0.018

T₀ = baseline; T₁ = 7 days; T₂ = 28 days; T₃ = 90 days; SE = standard error; RME = rapid maxillary expander; HX = Hyrax; IMHX = inverted mini-hyrax. Significant (p< 0.05) intra-group comparisons: a (T₀ x T₁); b (T₀ x T₂); c (T₀ x T₃); d (T₁ x T₃).