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Progress in Orthodontics

Table 8 Root control effect along the significant tipping direction

From: Different biomechanical effects of clear aligners in bimaxillary space closure under two strong anchorages: finite element analysis

Tooth

Anterior teeth

Posterior teeth

1

2

3

5

6

7

Moderate anchorage group (maxilla)

2.106L

2.164L

1.818D

2.533 M

2.673 M

3.064 M

Moderate anchorage group (mandible)

2.414L

2.299L

1.653D

3.456 M

7.760 M

8.730 M

Indirect anchorage group (maxilla)

2.147L

2.225L

1.870D

0.974 M

2.175 M

2.356 M

Indirect anchorage group (mandible)

3.149L

3.071L

2.108D

0.500 M

0.936 M

0.879 M

Direct anchorage group (maxilla)

2.093L

2.212L

1.903D

2.482 M

2.826 M

3.280 M

Direct anchorage group (mandible)

2.471L

2.394L

1.790D

3.316 M

8.052 M

11.238 M

150 g elastic force group (maxilla)

2.057L

3.879L

3.200D

1.477D

1.880D

1.906D

150 g elastic force group (mandible)

7.174L

16.461L

11.018D

2.537D

4.484D

3.684D

  1. The root control effect is reflected by the crown-root movement ratio; the calculation is described in the Methodology section. The value with the same direction can be directly compared; the larger the value, the greater the root control ability of the corresponding direction. L, lingual root control ability; M, mesial root control ability; D, distal root control ability. 1, central incisor; 2, lateral incisor; 3, canine; 5, second premolar; 6, first molar; 7, second molar
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