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Table 2 Changes in mandibular incisor inclination and clinical crown height (gingival recession) in the three time point intervals (dependent t tests)

From: Mandibular incisor inclination and gingival recession after treatment with the Jasper Jumper: a 10-year follow-up

  T1 T2 T3 T2–T1 T3–T2 T3–T1
Mean SD Mean SD Mean SD Mean SD P Mean SD P Mean SD P
IMPA (L1-MP) (∫) 99.39 7.20 103.48 7.71 104.56 8.04 4.09 4.84 0.011* 1.09 4.52 0.351 5.18 4.92 0.000*
L1-NB (∫) 28.72 5.54 32.77 5.24 31.84 5.78 4.05 4.57 0.003* − 0.93 3.82 0.345 3.12 5.08 0.018*
L1-NB (mm) 5.31 2.20 6.54 2.54 6.24 2.47 1.23 1.41 0.003* − 0.91 1.15 0.312 0.93 1.41 0.011*
L1 to A-Po (mm) 1.46 1.59 3.11 2.04 2.42 1.43 1.64 2.50 0.019* − 0.69 2.07 0.205 0.96 1.54 0.023*
Clinical crown height (mm) 7.32 0.80 7.30 0.99 7.78 0.94 − 0.03 0.65 0.873 0.49 0.91 0.049* 0.46 0.80 0.020*
  1. T1—Pretreatment; T2—Posttreatment; T3—Follow-up
  2. *Statistically significant at P < 0.05