Table 2.

Pretreatment and Posttreatment Intragroup and Intergroup Comparisons of Plaque Index, Gingival Index, and Probing Depth Measurements for Maxillary and Mandibular Dental Arches

Group	Maxillary Dental Arch			Mandibular Dental Arch
	Pretreatment, Mean ± SD	Posttreatment, Mean ± SD	Pa	Pretreatment, Mean ± SD	Posttreatment, Mean ± SD	Pa
Plaque index
Protrusion	1.05 ± 0.30	0.92 ± 0.48	.151	1.06 ± 0.34	0.94 ± 0.50	.234
Retrusion	1.07 ± 0.23	1.06 ± 0.40	.873	1.08 ± 0.23	1.09 ± 0.37	.812
Total	1.06 ± 0.26	0.99 ± 0.44	.208	1.07 ± 0.29	1.01 ± 0.45	.339
Pb	.791	.226		0.833	0.178
Gingival index
Protrusion	0.68 ± 0.39	0.69 ± 0.38	.917	0.62 ± 0.37	0.66 ± 0.41	.290
Retrusion	0.58 ± 0.44	0.72 ± 0.41	.097	0.57 ± 0.40	0.64 ± 0.43	.300
Total	0.63 ± 0.42	0.71 ± 0.39	.179	0.59 ± 0.38	0.65 ± 0.41	.145
Pb	.363	.760		0.611	0.876
Probing depth
Protrusion	1.79 ± 0.40	1.76 ± 0.31	.763	1.84 ± 0.40	1.78 ± 0.29	.451
Retrusion	1.74 ± 0.53	1.76 ± 0.33	.834	1.67 ± 0.51	1.73 ± 0.35	.609
Total	1.77 ± 0.46	1.76 ± 0.32	.964	1.76 ± 0.46	1.75 ± 0.31	.970
Pb	.691	.977		0.167	0.582

^aIndicates differences between the pretreatment and posttreatment measurements.

^bIndicates differences between the protrusion and retrusion groups.