Table 3.

Differences Between Upper and Lower Aligners

Tooth	Site	Mean Difference	Lower 95% CI	Upper 95% CI	P Value
Incisor	GB	–0.04	–0.11	0.04	.373
	B	0.001	–0.07	0.07	.975
	O	–0.03	–0.12	0.06	.508
	L	–0.02	–0.10	0.05	.554
	GL	–0.06	–0.14	0.01	.093
Canine	GB	–0.02	–0.09	0.04	.510
	B	0.0004	–0.07	0.07	.990
	O	–0.02	–0.10	0.06	.715
	L	–0.09	–0.08	0.06	.810
	GL	–0.07	–0.15	0.02	.175
Molar	GB	0.01	–0.06	0.09	.720
	B	–0.01	–0.09	0.07	.750
	O	–0.01	–0.09	0.06	.652
	L	0.07	0.01	0.13	.038*
	GL	0.01	–0.08	0.09	.854

^*P = 0.038