Table 2 Mean, standard deviation of upper and lower intercanine width and inter-first-molar width in primary, mixed, and permanent dentitions
From: Dental arch form and arch dimensions among a group of Egyptian children and adolescents
| Â | Â | Deciduous | Mixed | Permanent |
|---|---|---|---|---|
Upper intercanine width | Mean | 30.70 | 30.88 | 35.18 |
| Â | SD | 2.40 | 2.32 | 2.22 |
Lower intercanine width | Mean | 23.38 | 24.98 | 28.01 |
| Â | SD | 2.28 | 1.88 | 2.43 |
Upper inter-first-molar width | Mean | – | 43.61 | 46.95 |
|  | SD | – | 3.71 | 3.13 |
Lower inter-first-molar width | Mean | – | 39.20 | 42.74 |
|  | SD | – | 3.04 | 2.74 |