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Table 1 Gro up data for pre-treatment ages and duration of treatment

From: Changes of occlusal plane inclination after orthodontic treatment in different dentoskeletal frames

  Number Female number Male number Pre-treatment age (years) Duration of treatment
Mean ± SD Mean ± SD
Skeletal class I 30 14 16 13.75 ± 1.54 2.12 ± 0.50
Skeletal class II 30 17 13 13.03 ± 1.41 2.28 ± 0.49
Skeletal class III 30 16 14 13.63 ± 1.44 2.07 ± 0.48
Total 90 47 43 13.47 ± 1.48 2.16 ± 0.49