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Table 2 Buccal surface curvature at variable distances from the cusp tip of first mandibular premolars

From: The effect of vertical bracket positioning on torque and the resultant stress in the periodontal ligament—a finite element study

Distance (mm) Maximum Minimum Maximum-Minimum Mean (SD) ∆ Mean
0.5 47.1 26.1 21 36.73 (5.2)  
1 45.5 30.1 15.4 39.81 (4.2) −3.08
1.5 48 34.7 13.3 42.67 (4) −2.87
2 49.3 37.9 11.4 44.3 (4.2) −1.63
2.5 49.6 29 20.6 42.7 (5) 1.62
3 49.1 29 20.1 39.99 (6.1) 2.69
3.5 46.7 26.4 20.3 36.91 (6.4) 3.09
4 48.9 25.6 23.3 32.92 (6.8) 3.99
4.5 44.5 23.8 20.7 28.8 (6.2) 4.12
5 38.1 19.7 18.4 24.2 (5.4) 4.6
5.5 31.5 15.8 17.7 21.51 (5.7) 2.69
6 29.7 14.1 15.6 18.91 (6.3) 2.6
  1. ∆ Mean, the difference between the mean surface curvatures of two subsequent vertical distances.