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Table 3 Means, SD in parentheses of the molar inclination angles and movement percentages between T1 and T2, and P values, 95% CI of intragroup differences (paired t-test): Ret, retention group; Non, non-retention group; *, Wilcoxon signed-rank test

From: Does fixed retention prevent overeruption of unopposed mandibular second molars in maxillary first molar extraction cases?

  T2-T1
Measurement Ret (n=30) P value 95% CI Non (n=35) P value 95% CI
36-MP (°)* −0.9 (3.6) 0.18 −0.45 to 2.24 −0.3 (3.5) 0.58 −0.88 to 1.55
37-MP (°)* −0.4 (4.4) 0.60 −1.21 to 2.05 0.2 (3.6) 0.73 −1.44 to 1.02
46-MP (°) −1.1 (4.1) 0.16 −0.46 to 2.60 −0.2 (4.3) 0.77 −1.26 to 1.67
47-MP (°) −1.5 (4.6) 0.09 −0.25 to 3.22 0.5 (5.2) 0.59 −2.27 to 1.32
37 V/MD (%) 1.0 (4.4) 0.23 −0.66 to 2.65 1.2 (5.2) 0.19 −0.60 to 2.98
47 V/MD (%) 0.5 (5.5) 0.61 −1.54 to 2.57 1.1 (5.7) 0.26 −0.84 to 3.06