Table 1.
Descriptive statistics and relative variability for repeated cephalometric interincisal angulation measurements by horse, tooth position, and measuring method.
| Method | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Horse | LACC | LPB | Mean (α) | Variance | SD (α) | Min (α) | Max (α) | Diffmax (α) | CV (%)a |
| Tooth position | |||||||||
| 1 | 01 | - | 153.9 | 0.72 | 0.85 | 152.8 | 155.3 | 2.6 | 0.55 |
| 02 | - | 149.3 | 0.38 | 0.62 | 148.4 | 150.5 | 2.0 | 0.42 | |
| 03 | - | 122.5 | 2.74 | 1.66 | 118.1 | 123.6 | 5.5 | 1.35 | |
| - | 03b | - | - | - | - | - | - | - | |
| 2 | 01 | - | 147.8 | 0.36 | 0.60 | 146.4 | 148.6 | 2.2 | 0.41 |
| 02 | - | 145.2 | 0.68 | 0.82 | 144.0 | 146.9 | 3.0 | 0.57 | |
| 03 | - | 148.9 | 0.65 | 0.81 | 148.0 | 150.2 | 2.2 | 0.54 | |
| - | 03 | 131.3 | 9.74 | 3.12 | 126.2 | 134.1 | 7.8 | 2.38 | |
| 3 | 01 | - | 139.5 | 0.61 | 0.78 | 138.3 | 140.9 | 2.6 | 0.56 |
| 02 | - | 135.8 | 0.76 | 0.87 | 134.3 | 137.7 | 3.4 | 0.64 | |
| 03 | - | 120.0 | 0.26 | 0.51 | 119.0 | 120.7 | 1.8 | 0.43 | |
| - | 03 | 112.0 | 2.86 | 1.69 | 109.7 | 115.0 | 5.3 | 1.51 | |
| 4 | 01 | - | 131.6 | 0.27 | 0.52 | 130.5 | 132.5 | 2.0 | 0.40 |
| 02 | - | 130.6 | 0.40 | 0.63 | 129.6 | 131.6 | 2.1 | 0.48 | |
| 03 | - | 124.0 | 0.33 | 0.58 | 123.1 | 124.8 | 1.7 | 0.47 | |
| - | 03 | 118.1 | 1.83 | 1.35 | 116.4 | 120.5 | 4.1 | 1.14 | |
| 5 | 01 | - | 137.3 | 0.98 | 0.99 | 135.9 | 139.3 | 3.4 | 0.72 |
| 02 | - | 131.5 | 0.54 | 0.73 | 130.3 | 132.9 | 2.6 | 0.56 | |
| 03 | - | 122.3 | 0.07 | 0.27 | 122.0 | 122.9 | 0.9 | 0.22 | |
| - | 03 | 128.7 | 1.78 | 1.33 | 126.6 | 131.3 | 4.7 | 1.04 | |
| 6 | 01 | - | 147.2 | 1.01 | 1.00 | 145.4 | 149.0 | 3.6 | 0.68 |
| 02 | - | 140.1 | 0.29 | 0.54 | 139.2 | 141.2 | 2.0 | 0.39 | |
| 03 | - | 116.1 | 0.97 | 0.98 | 115.1 | 118.0 | 2.9 | 0.85 | |
| - | 03 | 111.3 | 0.67 | 0.82 | 109.9 | 112.9 | 3.1 | 0.74 | |
| 7 | 01 | - | 110.3 | 0.26 | 0.51 | 109.6 | 111.1 | 1.5 | 0.46 |
| 02 | - | 109.1 | 0.50 | 0.71 | 108.0 | 110.4 | 2.4 | 0.65 | |
| 03 | - | 87.5 | 0.12 | 0.35 | 86.7 | 88.0 | 1.2 | 0.40 | |
| - | 03 | 72.1 | 1.40 | 1.18 | 70.4 | 74.7 | 4.3 | 1.64 | |
| 8 | 01 | - | 121.0 | 0.24 | 0.49 | 120.1 | 121.5 | 1.4 | 0.41 |
| 02 | - | 122.7 | 0.30 | 0.55 | 122.0 | 123.5 | 1.5 | 0.45 | |
| 03 | - | 113.8 | 1.32 | 1.15 | 112.2 | 116.0 | 3.8 | 1.01 | |
| - | 03 | 100.7 | 1.26 | 1.12 | 98.7 | 102.2 | 3.5 | 1.11 | |
| 9 | 01 | - | 120.0 | 2.84 | 1.68 | 117.6 | 123.8 | 6.1 | 1.40 |
| 02 | - | 120.9 | 1.45 | 1.20 | 119.6 | 123.9 | 4.3 | 1.00 | |
| 03 | - | 108.9 | 1.11 | 1.05 | 107.2 | 110.5 | 3.3 | 0.97 | |
| - | 03 | 98.1 | 2.38 | 1.54 | 95.4 | 100.6 | 5.2 | 1.57 | |
| 10 | 01 | - | 118.9 | 0.96 | 0.98 | 117.0 | 119.6 | 2.6 | 0.83 |
| 02 | - | 112.9 | 0.43 | 0.66 | 111.8 | 114.1 | 2.3 | 0.58 | |
| 03 | - | 101.8 | 1.99 | 1.41 | 98.9 | 103.6 | 4.7 | 1.38 | |
| - | 03 | 90.4 | 1.14 | 1.07 | 88.5 | 91.5 | 2.9 | 1.18 | |
LACC, labial axis of the clinical crown; LPB, lingual and palatal border; α, alpha angle degrees; SD, standard deviation; Min, minimum; Max, maximum; Diffmax, maximum difference; CV, coefficient of variation; Values are based on 10 (n = 10) repeated measurements for each tooth position or measuring method.
a
CV represents the SD in percent of the mean.
b
The short and irregular lingual and palatal surface of the deciduous upper jaw incisor clinical crown did not allow accurate definition of a clinical crown axis and, hence, no determination of the IIA.