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Table 3 Mean, standard deviation of arch perimeter in upper and lower arches in primary, mixed, and permanent dentitions

From: Dental arch form and arch dimensions among a group of Egyptian children and adolescents

  

Deciduous

Mixed

Permanent

Upper arch perimeter (AP)

Mean

81.19

92.54

104.74

 

SD

11.78

10.51

22.61

Lower arch perimeter (AP)

Mean

72.79

88.29

97.81

 

SD

15.57

10.33

20.41