pISSN 2234-7518
eISSN 2005-372X
eISSN 2005-372X
Descriptive statistics of root inclination for dentition relative to basal bone in the Class I and Class II groups along with the results of significance testing
| Position | Region | Teeth No. | Male | Female | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Class I (n = 20) |
Class II (n = 20) |
P value | Class I (n = 20) |
Class II (n = 20) |
P value | |||||
| Mean ± SD | Mean ± SD | Mean ± SD | Mean ± SD | |||||||
| Maxilla | Anterior region (°) | 1 | 115.30 ± 6.47 | 112.29 ± 6.09 | 0.137 | 113.14 ± 7.18 | 112.50 ± 7.43 | 0.781 | ||
| 2 | 113.28 ± 6.78 | 109.67 ± 6.57 | 0.095 | 113.86 ± 7.44 | 111.84 ± 6.39 | 0.363 | ||||
| 3 | 105.48 ± 6.81 | 101.68 ± 4.89 | 0.050 | 104.78 ± 7.54 | 102.40 ± 5.45 | 0.260 | ||||
| Premolar region (°) | 4 | 85.92 ± 1.63 | 85.74 ± 2.40 | 0.780 | 85.34 ± 2.49 | 85.66 ± 2.25 | 0.670 | |||
| 5 | 85.02 ± 3.11 | 85.26 ± 2.70 | 0.798 | 84.33 ± 3.44 | 83.59 ± 3.23 | 0.488 | ||||
| Molar region (°) | 6 | 83.15 ± 3.25 | 80.72 ± 5.46 | 0.096 | 83.35 ± 3.91 | 79.70 ± 6.46 | 0.037 |
|||
| 7 | 84.11 ± 3.27 | 83.69 ± 3.41 | 0.699 | 82.49 ± 2.81 | 82.54 ± 4.31 | 0.969 | ||||
| Mandible | Anterior region (°) | 1 | 97.19 ± 4.41 | 106.06 ± 7.68 | < 0.001 |
97.51 ± 5.49 | 108.62 ± 7.14 | < 0.001 |
||
| 2 | 95.85 ± 3.88 | 102.47 ± 6.39 | < 0.001 |
98.85 ± 6.23 | 106.97 ± 8.13 | 0.001 |
||||
| 3 | 94.61 ± 3.37 | 98.10 ± 5.25 | 0.017 |
95.42 ± 3.03 | 101.25 ± 6.14 | < 0.001 |
||||
| Premolar region (°) | 4 | 86.34 ± 1.72 | 84.16 ± 2.88 | 0.006 |
85.36 ± 2.68 | 84.92 ± 2.42 | 0.585 | |||
| 5 | 83.70 ± 3.21 | 83.93 ± 4.18 | 0.849 | 83.25 ± 3.49 | 84.62 ± 3.36 | 0.217 | ||||
| Molar region (°) | 6 | 73.43 ± 4.56 | 77.02 ± 3.61 | 0.009 |
71.69 ± 4.41 | 74.93 ± 4.67 | 0.030 |
|||
| 7 | 67.39 ± 7.62 | 73.21 ± 6.22 | 0.012 |
68.79 ± 5.54 | 71.33 ± 6.71 | 0.199 | ||||
A larger angle indicates that the crowns of the teeth are more inclined toward the lingual (anterior teeth) or labial (posterior teeth) sides.
SD, standard deviation; 1, central incisor; 2, lateral incisor; 3, canine; 4, first premolar; 5, second premolar; 6, first molar; 7, second molar.
*P < 0.05, **P < 0.01, ***P < 0.001.