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Table 1 Descriptive analysis of patients’ ages at selected time points (T0, immediately prior to bonding of the fixed lingual appliance; T1, initiation of anchorage reinforcement by adding Herbst telescopes; T2, completion of space closure and removal of Herbst telescopes; T3, de-bonding of the fixed lingual appliance)

From: Quality of occlusal outcome following space closure in cases of lower second premolar aplasia using lingual orthodontic molar mesialization without maxillary counterbalancing extraction

  T0 T1 T2 T3
Age [years]: Mean 15.0 16.0 17.2 18.2
(SD; min.; max.) (1.7; 12.3; 20.6) (1.8; 13.3; 21.8) (1.8; 14.7; 22.9) (2.0; 15.5; 24.7)