Group 1 (Third molars extracted) ( |
Group 2 (Third molars present) ( |
||||
---|---|---|---|---|---|
Mean (min-max) or |
SD | Mean (min-max) or n | SD | ||
Age (years) | 15.7 | 2.8 | 15.7 | 1.7 | 0.567 |
(13.4-21.2) | (13.7-18.9) | ||||
Sex | |||||
Female | 9 | 10 | 0.876 | ||
Male | 2 | 2 | |||
Anteroposterior discrepancy | |||||
1 / 4-cusp | 0 | 0 | 0.789 | ||
1 /2-cusp | 6 | 7 | |||
3/4-cusp | 2 | 3 | |||
full-cusp | 3 | 2 |
Group 1 (Third molars extracted) | Group 2 (Third molars present) | |||||||
---|---|---|---|---|---|---|---|---|
T0 | Changes | T0 | Changes | Between groups | ||||
Mean ± SD | Mean ± SD | Mean ± SD | Mean ± SD | Comparison at T0 |
Comparison of changes |
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Skeletal | ||||||||
SNA (°) | 80.7 ± 2.6 | -1.1 ± 2.3 | 0.214 | 81.8 ± 2.9 | -1.3 ± 2.8 | 0.292 | 0.391 | 0.066 |
SNB (°) | 74.9 ± 2.6 | 1.1 ± 1.5 | 0.396 | 75.8 ± 3.4 | 0.9 ± 1.5 | 0.721 | 0.369 | 0.437 |
ANB (°) | 5.8 ± 1.9 | -0.5 ± 1.6 | 0.678 | 6 ± 3 | 0.9 ± 1.5 | 0.357 | 0.806 | 0.413 |
GoGn . SN (°) | 30.1 ± 4.1 | -1.2 ± 1.5 | 0.678 | 33.3 ± 6.7 | -0.8 ± 1.2 | 0.541 | 0.307 | 0.967 |
Dental - Model | ||||||||
U5 - rugae line (mm) | 6.1 ± 2.9 | 3.2 ± 2.1 | 8.2 ± 2.7 | 3.6 ± 1.9 | 0.142 | 0.514 | ||
U6 - rugae line (mm) | 15.3 ± 3 | 4.5 ± 1.8 | 17.3 ± 2.6 | 3.9 ± 1.7 | 0.102 | 0.191 | ||
U7 - rugae line (mm) | 25.7 ± 3.3 | 4.8 ± 1.9 | 28.3 ± 2.5 | 3.6 ± 2.3 | ||||
U5 - U5 (mm) | 43.1 ± 3.6 | 1.8 ± 2.1 | 43.9 ± 4.3 | 2.1 ± 3.9 | 0.288 | 0.514 | ||
U6 - U6 (mm) | 41.8 ± 4.1 | -0.2 ± 1.6 | 0.859 | 42.8 ± 2.7 | 0.6 ± 1.6 | 0.333 | 0.327 | 0.369 |
U7 - U7 (mm) | 47.2 ± 3.1 | 1.9 ± 3.7 | 48.6 ± 3.6 | 7.2 ± 4.9 | 0.369 | |||
U5 . U5 (°) | 137.9 ± 11.4 | 10.5 ± 6 | 135.8 ± 10.3 | 6.7 ± 6.9 | 0.935 | 0.051 | ||
U6 . U6 (°) | 119 ± 9.3 | -2.5 ± 7.5 | 0.314 | 121.9 ± 10 | -2.7 ± 5.1 | 0.169 | 0.462 | 0.838 |
U7 . U7 (°) | 120 ± 6.4 | 3.7 ± 4.7 | 119.6 ± 11.9 | -6.2 ± 8.7 | 0.241 | 0.935 | ||
Dental - Cephalometric | ||||||||
U6M - VRP (mm) | 41.2 ± 4.1 | -3.9 ± 2.3 | 39.3 ± 3 | -3.4 ± 2.4 | 0.414 | 0.178 | ||
U6trifurc. - VRP (mm) | 37.6 ± 3.8 | -4.5 ± 5.6 | 36 ± 3.3 | -3.5 ± 3.2 | 0.514 | |||
U6root - VRP (mm) | 40.3 ± 3.7 | -5.5 ± 4.3 | 38.7 ± 3.7 | -3.8 ± 5.4 | 0.624 | |||
U5 . HRP (°) | 96.2 ± 3.6 | 7.6 ± 3.7 | 96.8 ± 4.8 | 8.6 ± 3.1 | 0.902 | 0.683 | ||
U6 . HRP (°) | 98 ± 3.5 | -7.7 ± 3.2 | 100.9 ± 3.6 | -3.9 ± 2.7 | 0.102 | |||
U7 . HRP (°) | 108.4 ± 7.7 | -4.1 ± 4.6 | 113 ± 4.6 | -1.1 ± 2.2 | 0.139 | 0.142 | ||
U6 MB - HRP (mm) | 64.2 ± 5.3 | -1.9 ± 1.1 | 59.9 ± 3.8 | -1.1 ± 0.9 | 0.079 | |||
Occ Plane . SN (°) | 18.3 ± 5 | 4.9 ± 3.7 | 16.9 ± 4.2 | 2.2 ± 3.2 | 0.462 | |||
U1i - VRP (mm) | 66.2 ± 7.8 | -1.2 ± 1.6 | 65.5 ± 4.6 | -0.5 ± 2.7 | 0.775 | 0.066 | ||
U1 . HRP (°) | 108.9 ± 11 | -2.1 ± 2.8 | 108.5 ± 8.2 | -3 ± 2.2 | 0.568 | 0.221 | ||
L1 . HRP (°) | 62.7 ± 5.8 | 0.9 ± 1.2 | 0.579 | 64.1 ± 4.3 | 0.7 ± 0.9 | 0.668 | 0.229 | 0.765 |
Overjet (mm) | 5.8 ± 2.8 | -1.4 ± 1.9 | 0.261 | 5.2 ± 1.9 | -1.1 ± 1.9 | 0.553 | 0.624 | 0.178 |
Overbite (mm) | 3.7 ± 1.7 | -0.9 ± 1.2 | 0.859 | 3.2 ± 1.5 | -1.5 ± 1.9 | 0.059 | 0.624 | 0.102 |