Table 3 Regression analysis showing variation in dental arch dimensions with Age
Measurement (mm) | Regression coefficient (95 % CI) | P value | Constant (95 % CI) |
|---|---|---|---|
Maxillary (overall) | 0.96 (−0.47 to 2.40) | 0.19 | 31.56 (30.41 to 32.72) |
Inter-canine distance | 0.88 (0.09 to 1.67) | 0.03 | 35.36 (34.73 to 36.00) |
Second inter-premolar distance | 1.02 (0.16 to 1.88) | 0.02 | 41.98 (41.30 to 42.68) |
First molar distance | 1.21 (0.26 to 2.16) | 0.01 | 47.52 (46.76 to 48.29) |
Total arch length | 0.57 (−0.26 to 1.40) | 0.18 | 32.32 (31.65 to 32.99) |
Anterior segment length | 0.34 (−0.24 to 0.92) | 0.25 | 13.16 (12.70 to 13.62) |
Posterior segment length | 1.30 (−0.52 to 3.12) | 0.16 | 19.16 (17.70 to 20.62) |
Mandibular (overall) | 1.20 (−0.29 to 2.70) | 0.12 | 27.30 (26.10 to 28.50) |
Inter-canine distance | 0.52 (−0.24 to 1.27) | 0.18 | 26.72 (26.12 to 27.33) |
Second inter-premolar distance | 0.80 (−0.11 to 1.71) | 0.09 | 36.04 (35.31 to 36.77) |
First molar distance | 0.92 (−0.26 to 2.10) | 0.13 | 41.14 (40.20 to 42.08) |
Total arch length | 0.99 (0.12 to 1.86) | 0.03 | 28.73 (28.03 to 29.42) |
Anterior segment length | 0.28 (−0.4 to 0.95) | 0.42 | 9.08 (8.54 to 9.63) |
Posterior segment length | 4.94 (−0.31 to 10.18) | 0.07 | 22.37 (18.15 to 26.59) |