Table 2.
Mean, standard deviation, minimum, and maximum values and comparison of cephalometric measurements before (T1) and after (T2) clear aligner treatment for open bite correction in adult nonextraction cases (n = 69)
| Measurement | T1 | T2 | Changes (T2-T1) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean | SD | Min | Max | Mean | SD | Min | Max | Mean | SD | Min | Max | p-value | |||
| ANB (°) | 4.21 | 2.65 | −1.60 | 9.90 | 4.10 | 2.66 | −1.95 | 9.40 | −0.11 | 0.46 | −2.00 | 0.80 | 0.05 | ||
| SNA (°) | 79.47 | 4.05 | 71.70 | 90.30 | 79.51 | 4.13 | 71.70 | 90.65 | 0.04 | 0.20 | −0.75 | 0.65 | 0.07 | ||
| SNB (°) | 75.26 | 4.67 | 65.70 | 88.65 | 75.42 | 4.63 | 66.90 | 88.50 | 0.16 | 0.44 | −1.00 | 1.40 | 0.004** | ||
| OPA (°) | 20.68 | 5.42 | 5.00 | 34.40 | 21.23 | 5.88 | 3.45 | 32.65 | 0.54 | 2.21 | −3.35 | 8.05 | 0.05 | ||
| MPA (°) | 41.07 | 7.41 | 22.75 | 57.75 | 40.64 | 7.41 | 23.20 | 57.65 | −0.42 | 0.95 | −2.35 | 3.40 | 0.004** | ||
| LFH (mm) | 72.64 | 5.41 | 59.30 | 87.15 | 72.04 | 5.64 | 59.30 | 86.50 | −0.60 | 1.10 | −3.05 | 3.40 | < 0.001*** | ||
| IIA (°) | 122.78 | 9.13 | 100.95 | 143.35 | 132.80 | 8.42 | 112.90 | 152.80 | 10.02 | 6.40 | −5.55 | 30.25 | < 0.001*** | ||
| U1SNA (°) | 102.04 | 6.81 | 89.30 | 120.40 | 96.35 | 7.30 | 83.00 | 116.95 | −5.69 | 4.38 | −21.75 | 3.95 | < 0.001*** | ||
| IMPA (°) | 94.11 | 7.11 | 75.60 | 109.10 | 90.22 | 7.67 | 67.40 | 104.20 | −3.89 | 4.55 | −16.00 | 13.55 | < 0.001*** | ||
| OB (mm) | −2.21 | 1.39 | −6.55 | −0.55 | 1.09 | 0.80 | −0.85 | 2.85 | 3.30 | 1.43 | 0.70 | 7.05 | < 0.001*** | ||
| OJ (mm) | 3.22 | 2.05 | −2.75 | 10.75 | 2.64 | 0.69 | 0.80 | 5.75 | −0.59 | 1.94 | −8.85 | 4.65 | 0.01* | ||
| U6-PP (mm) | 24.99 | 2.38 | 20.35 | 31.30 | 24.63 | 2.44 | 19.70 | 31.80 | −0.36 | 0.58 | −1.85 | 1.25 | < 0.001*** | ||
| U1-PP (mm) | 29.80 | 2.83 | 23.65 | 38.35 | 31.01 | 2.92 | 24.40 | 38.40 | 1.20 | 0.93 | −0.45 | 3.90 | < 0.001*** | ||
| L6-MP (mm) | 33.85 | 2.78 | 28.90 | 42.80 | 33.73 | 2.82 | 28.80 | 42.05 | −0.12 | 0.47 | −1.00 | 1.35 | 0.04* | ||
| L1-MP (mm) | 37.39 | 3.37 | 30.50 | 43.85 | 38.75 | 3.85 | 32.15 | 47.70 | 1.36 | 1.30 | −1.60 | 4.70 | < 0.001*** | ||
ANB, point A-nasion-poing B angle; SNA, sella-nasion-point A angle; SNB, sella-nasion-point B angle; OPA, occlusal plane angle; MPA, mandibular plane angle; LFH, lower facial height; IIA, interincisal angle; U1SNA, upper incisor to sella-nasion angle; IMPA, incisor mandibular plane angle; OB, overbite; OJ, overjet.
Paired sample t-tests were performed to compare T1 and T2 difference. *p < 0.05; **p < 0.01; ***p < 0.001.
See Figure 1 for definitions of the other measurement.