Treatment of a severe skeletal Class II malocclusion through growth modification: a problem-oriented case report
Publié en ligne: 25 sept. 2023
Pages: 82 - 95
Reçu: 01 févr. 2023
Accepté: 01 juil. 2023
© 2023 Yimeng Yan et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.
Cephalometric measurements (T1 Pretreatment; T2 12 months after Twin-block treatment; T3 36 months after fixed orthodontic treatment)
Measurement |
Norm |
T1 |
T2 |
T3 |
SNA(°) |
83.0 |
87.3 |
86.8 |
86.1 |
SNB(°) |
80.0 |
77.9 |
79.6 |
81.6 |
ANB(°) |
3.0 |
9.4 |
7.2 |
4.5 |
NP-FH(°) |
85.0 |
81.5 |
84.5 |
84.4 |
NA-PA(°) |
6.0 |
19.8 |
16.5 |
10.0 |
U1-SN(°) |
105.0 |
108.8 |
101.3 |
107.9 |
U1-NA(°) |
22.0 |
21.6 |
14.5 |
21.9 |
L1-NB(°) |
30.0 |
37.3 |
41.4 |
25.6 |
IMPA(°) |
88.0 |
111.0 |
113.2 |
98.7 |
FMIA(°) |
67.0 |
44.0 |
43.1 |
59.0 |
FMA(°) |
25.0 |
25.0 |
23.7 |
22.3 |
Y-axis angle (°) |
65.8 |
65.8 |
64.2 |
64.0 |
Z-angle(°) |
75.0 |
52.8 |
59.7 |
65.3 |
Po-Go(mm) |
– |
6.9 |
7.2 |
7.3 |
Gn-Co(mm) |
– |
10.2 |
10.8 |
11.1 |