Stress distribution patterns at mini-implant site during retraction and intrusion—a three-dimensional finite element study

Progress in Orthodontics

Table 3 Maximum von Mises stress (MPa) for force simulating anterior retraction

Dimension of mini-implant	Maximum stress in mini-implant	Maximum stress in the cortical bone	Maximum stress in the cancellous bone
Group 1a (Fig. 3)	34.82	22.66	0.24
Group 1b	41.005	32.23	0.31
Group 2a	39.82	26.63	0.27
Group 2b	38.97	28.02	0.30
Group 3a (Fig. 4)	270.12	106.36	0.35
Group 3b	143.84	54.63	0.31
Group 4a	209.4	84.67	0.32
Group 4b	213.2	78.23	0.41