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 4

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

	Lever arm distal to canine (μm)
	Miniscrew height: 8 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	-3.25	73.21	-52.35	530.01	10.47	107.97	-3.96	93.43	-60.62	608.97	26.95	107.54	-4.80	116.88	-68.30	667.58	46.70	81.83
Lateral incisor	-4.68	66.51	-24.30	474.38	33.73	51.82	-5.71	83.95	-18.62	543.86	51.37	40.80	-6.10	107.68	-21.84	602.97	74.54	24.11
Canine	-5.48	446.97	-23.62	26.45	2.36	45.92	-5.06	638.91	-11.98	-83.46	9.86	88.15	-7.06	752.63	-9.44	-151.54	22.69	82.41