Table 4.

Pretreatment and Posttreatment Intragroup and Intergroup Comparisons of Gingival Thickness and Keratinized Gingival Width for Maxillary and Mandibular Anterior Teeth

Tooth No.a	Group	Gingival Thickness			Keratinized Gingival Width
		Pretreatment, Mean ± SD	Posttreatment, Mean ± SD	Pa	Pretreatment, Mean ± SD	Posttreatment, Mean ± SD	Pb
Maxillary dental arch
11	Protrusion	1.26 ± 0.38	0.92 ± 0.20	.001***	5.06 ± 1.65	4.60 ± 1.65	.085
	Retrusion	1.22 ± 0.30	0.86 ± 0.22	.001***	4.91 ± 1.67	4.85 ± 1.48	.864
	Total	1.24 ± 0.34	0.89 ± 0.21	.001***	4.99 ± 1.65	4.72 ± 1.56	.257
	Pc	.678	.322		.729	.540
12	Protrusion	1.22 ± 0.49	0.74 ± 0.17	.001***	7.38 ± 2.74	6.38 ± 2.03	.006**
	Retrusion	1.09 ± 0.40	0.76 ± 0.24	.001***	7.55 ± 1.99	6.95 ± 2.11	.277
	Total	1.16 ± 0.45	0.75 ± 0.21	.001***	7.46 ± 2.38	6.66 ± 2.07	.014*
	Pc	.283	.793		.789	.294
13	Protrusion	0.81 ± 0.27	0.67 ± 0.17	.033*	4.25 ± 2.63	4.46 ± 2.66	.356
	Retrusion	0.84 ± 0.21	0.67 ± 0.19	.002**	4.28 ± 2.17	4.41 ± 1.74	.746
	Total	0.82 ± 0.24	0.67 ± 0.18	.001***	4.26 ± 2.39	4.44 ± 2.23	.059
	Pc	.610	.932		.958	.932
21	Protrusion	1.28 ± 0.31	0.93 ± 0.21	.001***	4.61 ± 1.61	4.78 ± 1.71	.478
	Retrusion	1.19 ± 0.27	0.85 ± 0.31	.001***	4.76 ± 1.47	4.81 ± 1.58	.888
	Total	1.23 ± 0.29	0.89 ± 0.27	.001***	4.69 ± 1.53	4.80 ± 1.63	.607
	Pc	.254	.214		.709	.938
22	Protrusion	1.24 ± 0.39	0.76 ± 0.17	.001***	6.83 ± 2.01	6.03 ± 2.20	.017*
	Retrusion	1.16 ± 0.45	0.76 ± 0.27	.001***	6.86 ± 1.61	6.15 ± 1.82	.077
	Total	1.20 ± 0.42	0.76 ± 0.22	.001***	6.85 ± 1.81	6.09 ± 2.00	.003**
	Pc	.456	.980		.946	.824
23	Protrusion	0.79 ± 0.28	0.64 ± 0.18	.006**	4.07 ± 2.87	4.00 ± 1.74	.876
	Retrusion	0.84 ± 0.26	0.69 ± 0.24	.011*	4.13 ± 2.06	4.38 ± 1.54	.547
	Total	0.82 ± 0.27	0.67 ± 0.21	.001***	4.10 ± 2.48	4.19 ± 1.64	.756
	Pc	.484	.368		.918	.371
Mandibular dental arch
31	Protrusion	0.67 ± 0.19	0.49 ± 0.16	.001***	2.54 ± 1.18	2.78 ± 1.06	.164
	Retrusion	0.67 ± 0.14	0.44 ± 0.16	.001***	2.76 ± 1.32	2.40 ± 1.09	.094
	Total	0.67 ± 0.17	0.47 ± 0.16	.001***	2.65 ± 1.24	2.60 ± 1.08	.733
	Pc	.889	.266		.487	.158
32	Protrusion	0.81 ± 0.25	0.52 ± 0.19	.001***	3.95 ± 1.34	3.78 ± 1.24	.457
	Retrusion	0.70 ± 0.22	0.47 ± 0.18	.001***	3.68 ± 1.62	3.40 ± 1.44	.098
	Total	0.76 ± 0.24	0.50 ± 0.18	.001***	3.82 ± 1.47	3.60 ± 1.34	.116
	Pc	.059	.245		.472	.257
33	Protrusion	0.64 ± 0.21	0.45 ± 0.18	.001***	1.93 ± 1.13	2.21 ± 1.77	.179
	Retrusion	0.57 ± 0.16	0.38 ± 0.15	.001***	1.76 ± 1.40	1.76 ± 1.47	.999
	Total	0.61 ± 0.19	0.42 ± 0.17	.001***	1.85 ± 1.26	2.00 ± 1.64	.297
	Pc	.167	.124		.591	.286
41	Protrusion	0.74 ± 0.21	0.48 ± 0.18	.001***	2.69 ± 1.38	2.97 ± 1.34	.083
	Retrusion	0.66 ± 0.15	0.44 ± 0.20	.001***	3.03 ± 1.37	2.65 ± 0.94	.093
	Total	0.70 ± 0.19	0.46 ± 0.19	.001***	2.85 ± 1.37	2.81 ± 1.17	.774
	Pc	.104	.465		.336	.283
42	Protrusion	0.83 ± 0.34	0.53 ± 0.21	.001***	3.80 ± 1.51	3.59 ± 1.26	.368
	Retrusion	0.76 ± 0.19	0.46 ± 0.19	.001***	3.93 ± 1.38	3.68 ± 1.20	.138
	Total	0.80 ± 0.28	0.50 ± 0.20	.001***	3.86 ± 1.44	3.63 ± 1.22	.114
	Pc	.285	.211		.723	.768
43	Protrusion	0.62 ± 0.24	0.45 ± 0.20	.001***	2.00 ± 1.39	2.13 ± 1.46	.342
	Retrusion	0.60 ± 0.18	0.41 ± 0.16	.001***	1.61 ± 1.24	1.56 ± 1.25	.759
	Total	0.61 ± 0.21	0.43 ± 0.18	.001***	1.81 ± 1.32	1.86 ± 1.38	.657
	Pc	.725	.357		.255	.104

^aTooth numbering according to the FDI system.

^cIndicates differences between the protrusion and retrusion groups.

^bIndicates differences between the pretreatment and posttreatment measurements.

^*P < .05; ** P < .01; *** P < .001.