Table 3.
Descriptive statistics of 3 subgroups T0-T1.
| Damon Q (Mean ± SD) | Invisalign® (Mean ± SD) |
Significance between | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Subgroup I ① (n = 7) |
Subgroup II ② (n = 14) |
Subgroup III ③ (n = 12) |
Subgroup I ④ (n = 7) |
Subgroup II ⑤ (n = 9) |
Subgroup III ⑥ (n = 10) |
①②③ | ④⑤⑥ | ①④ | ②⑤ | ③⑥ | |
| U1-NA (°) | 14.80 ± 4.61 | 16.43 ± 6.27 | 17.56 ± 3.88 | 17.23 ± 6.96 | 18.53 ± 8.73 | 24.55 ± 6.47 | 0.63 | 0.11 | 0.46 | 0.51 | 0.01 |
| U1-NA (mm) | 5.60 ± 0.59 | 5.40 ± 1.83 | 5.07 ± 3.27 | 5.51 ± 2.37 | 6.48 ± 2.61 | 7.77 ± 2.00 | 0.84* | 0.16 | 0.93 | 0.26 | 0.09† |
| U1R-NA (mm) | 0.51 ± 0.59 | -0.44 ± 1.76 | -0.74 ± 0.90 | -0.82 ± 1.83 | 0.11 ± 1.93 | -2.06 ± 1.79 | 0.14 | 0.06 | 0.09 | 0.49 | 0.04 |
| U1-SN (°) | 15.59 ± 5.21 | 16.83 ± 6.27 | 17.98 ± 3.92 | 17.71 ± 9.10 | 18.78 ± 8.98 | 25.35 ± 6.72 | 0.73 | 0.12 | 0.60 | 0.55 | 0.00 |
| Maxillary Lip to E-plane (mm) | 1.80 ± 12.04 | 2.01 ± 1.37 | 2.23 ± 1.52 | 2.87 ± 3.05 | 1.70 ± 1.76 | 2.60 ± 1.65 | 0.90 | 0.51 | 0.46 | 0.64 | 0.51 |
Similar retraction effect among the 3 subgroups were obtained in both Damon Q and Invisalign® groups (P ≥ .06). More retractions and more labial root deviations were also obtained with Invisalign® in subgroup Ⅲ (P ≤ .04). Maxillary Lip to E-plane (mm) distance did not show significant differences among 3 subgroups between Damon Q and Invisalign® groups.
*
Multiple comparisons of 3 subgroups for Damon Q or Invisalign® were tested with ANOVA or Kruskal–Wallis test.
†
Comparisons between Damon Q and Invisalign® in different subgroups were tested with Independent t test or Mann–Whitney U test.