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

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

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