Table 3.
Mean Values (Degrees) and Standard Deviations (SD) of Cephalometric Variables in Participants Treated With the Eruption Guidance Appliance (EGA) and in Untreated Children From the Norwegian Growth Study, Nittedala
| Cephalometric Values |
EGA-Treated Children, Mean (SD) |
Untreated Children, Mean (SD) |
EGA Versus Untreated, P |
|||||||||
| Boys, n = 15 |
Girls, n = 20 |
Boys, n = 35 |
Girls, n = 39 |
Boys |
Girls |
|||||||
| T0 |
T2 |
T0 |
T2 |
9yr |
12yr |
9yr |
12yr |
T0 |
T2 |
T0 |
T2 |
|
| SNA, ° | 84.4 (3.2) | 84.9 (2.9) | 80.3 (3.7) | 81.1 (4.1) | 82.3 (3) | 84.0 (2.4) | 80.8 (3.4) | 82.0 (3.5) | .031* | .259 | .606 | .558 |
| SNB, ° | 80.2 (4.0) | 81.7 (3.2) | 76.2 (3.2) | 78.3 (3.4) | 78.9 (3.5) | 80.0 (3.0) | 78.0 (3.2) | 79.0 (3.3) | .254 | .078 | .045* | .488 |
| ANB, ° | 4.2 (2.3) | 3.2 (2.4) | 4.1 (1.7) | 2.7 (1.7) | 3.4 (2.1) | 4.0 (1.9) | 2.8 (2.2) | 3.0 (2.0) | .236 | .214 | .025* | .569 |
| ML/NSL, ° | 31 (5.3) | 28.9 (5.7) | 33 (5.7) | 31.0 (5.6) | 33.4 (5.9) | 32.6 (5.7) | 35 (4.6) | 33.5 (4.7) | .181 | .040* | .151 | .075 |
| NL/NSL, ° | 5.5 (2.2) | 4.8 (3.5) | 9.5 (3.4) | 8.5 (3.0) | 6.1 (2.8) | 6.1 (2.2) | 7.7 (2.5) | 7.8 (2.8) | .465 | .117 | .025* | .378 |
| Ili/ML, ° | 94.7 (5.3) | 98.8 (3.8) | 96.8 (6.4) | 99.2 (5.2) | 94.6 (5.9) | 95.6 (6.2) | 92.7 (5.1) | 92.9 (5.9) | .955 | .071 | .000*** | .000*** |
a
Statistical analysis: Independent sample t-test. ¤ Inclusion criteria used in the Norwegian growth study: Norwegian Caucasian origin, normal occlusion (minor rotations and spacing less than 1 mm were accepted), no apparent facial disharmony, no orthodontic treatment. T0 = before treatment, T2 = follow-up examination at age 12.
*
P < .05, ** P < .01, *** P < .001.