Table 3: TALD Overall Bolton and Anterior Bolton ratios for each group of crowding according to ABO score both for plaster and digital models.

Mean Values (SD)
- Plaster Digital
- A B C D E A B C D E
Maxillary
TALD a
0.54 (0.31) 1.87 (0.58) 3.76 (0.57) 5.33 (0.22) 8.82 (1.97) 0.53 (0.18) 2.29 (0.48) 4.31 (0.24) 6.40 (0.49) 10.25 (0.84)
Mandibular TALD a 0.33 (0.15) 2.17 (0.50) 4.10 (0.39) 5.69 (0.41) 8.64 (0.92) 0.55 (0.15) 2.64 (0.24) 4.62 (0.34) 6.52 (0.34) 10.68 (0.42)
Overall
Bolton Ratio b
94.53 (2.73) 92.05 (1.94) 93.54 (1.35) 92.64 (1.17) 93.41 (3.31) 94.42 (2.80) 92.22 (2.31) 92.31 (1.38) 91.58 (0.99) 92.69 (2.92)
Anterior
Bolton Ratio b
80.43 (4.89) 77.60 (2.73) 81.14 (1.27) 79.82 (1.22) 79.83 (3.24) 79.49 (3.40) 78.65 (2.74) 80.26 (0.81) 78.99 (1.40) 79.68 (2.80)