Table 4.

Means, Standard Deviations, Mean Differences Between Group I and Group II for Cephalometric Linear Measurements of Lower Teeth That Had Occurred Between T1 and T2^a

Variable	Group I, Mean ± SD (mm)	Group II, Mean ± SD (mm)	Mean Diff. (mm)	Std. Error Mean (mm)	95% CI of the Diff. (mm)	P Value
MC L.7-V	0.72 ± 0.68	1.05 ± 0.54	−0.33	0.19	−0.73 to 0.06	.095
DC L.7-V	−0.83 ± 0.69	0.86 ± 0.61	−1.69	0.20	−2.11 to −1.27	≤.001
MC L.6-V	0.90 ± 0.46	1.29 ± 0.46	−0.39	0.14	−0.68 to −0.09	.011
DC L.6-V	0.11 ± 0.81	1.15 ± 0.47	−1.04	0.21	−1.46 to −0.61	≤.001
CT L.5-V	1.02 ± 0.48	1.22 ± 0.52	−0.20	0.16	−0.53 to 0.11	.219
CT L.4-V	0.96 ± 0.41	1.06 ± 0.31	−0.10	0.11	−0.33 to 0.13	.386
LCI-V	−1.94 ± 0.90	−1.25 ± 0.80	−0.69	0.26	−1.24 to −0.14	.014
LCI-H	0.77 ± 0.64	0.86 ± 0.41	−0.08	0.17	−0.43 to 0.26	.623
Point I	−1.01 ± 0.80	−0.28 ± 0.50	−0.73	0.21	−1.15 to −0.30	.001
O.B Ch	4.07 ± 0.69	3.87 ± 0.72	0.20	0.22	−0.25 to −0.65	.378

^aCI indicates confidence interval; CT L.4-V, vertical change in the cusp tip of the lower first premolar; CT L.5-V, vertical change in the cusp tip of the lower second premolar; DC L.6-V, vertical change in the distal cusp of the lower first molar; DC L.7-V, vertical change in the distal cusp of the lower second molar; Diff., difference; LCI-H, horizontal change in the lower incisor position; LCI-V, vertical change in the lower incisor position; MC L.6-V, vertical change in the mesial cusp of the lower first molar; MC L.7-V, vertical change in the mesial cusp of the lower second molar; O.B Ch, change of the overbite; Point I, vertical change of the point I; SD, standard deviation; Std., standard.