Effects of Skeletally Supported Anterior en Masse Retraction with Varied Lever Arm Lengths and Locations in Lingual Orthodontic Treatment: A 3D Finite Element Study

Table 3

Initial tooth displacements following the application of retraction force (: +lingual, -labial; : +mesial, -distal; : +occlusal, -apical).

	Lever arm distal to canine (μm)
	Miniscrew height: 4.5 mm
	Lever arm length: 6 mm						Lever arm length: 8 mm						Lever arm length: 10 mm
	Root	Crown	Root	Crown	Root	Crown	Root	Crown	Root	Crown	Root	Crown	Root	Crown	Root	Crown	Root	Crown
	Central incisor	-3.92	74.91	-39.12	530.20	11.83	128.26	-4.41	88.37	-45.35	588.40	780.986	131.06	-4.95	106.97	-51.62	641.82	16.77	122.13
Lateral incisor	-5.16	77.72	-11.83	499.13	13.68	70.64	-5.54	95.63	-11.28	563.43	28.38	69.14	-5.92	112.17	-9.77	610.50	47.77	53.08
Canine	-1.81	375.91	-17.09	90.55	9.22	28.89	-1.25	500.69	-6.38	36.99	17.88	30.10	-4.0	639.75	-3.0	-59.21	28.20	51.27