Background
Materials and methods
Subjects
Amount | Age (y old) | CVS stage | ANB angle (°) | GoGn-SN (°) | |
---|---|---|---|---|---|
Group A | 45 | 11–14 | III or IV | 0–5 | 27.3–37.7 |
Group B | 45 | 18–30 | Mature | 0–5 | 27.3–37.7 |
Group C | 35 | 11–14 | III or IV | > 5 | > 37.7 |
Group D | 35 | 18–30 | Mature | > 5 | > 37.7 |
3dMD images
Parameters measured
Trichion | Tr | Orbitale superius right | Os_R |
Glabella | G | Orbitale superius left | Os_L |
Nasion | N′ | Orbitale right | Or_R |
Pronasale | Prn | Orbitale left | Or_L |
Columella | C | Cheek right | Chk_R |
Subnasale | Sn | Cheek left | Chk_L |
Labiale superius | Ls | Zygion right | Zy_R |
Stomion | Sto | Zygion left | Zy_L |
Labiale inferius | Li | Tragion right | Tra_R |
Sublabiale | Sl | Tragion left | Tra_L |
Pogonion | Pg′ | Alare right | Al_R |
Menton | Me′ | Alare left | Al_L |
Exocanthion right | Ex_R | Cheilion right | Ch_R |
Exocanthion left | Ex_L | Cheilion left | Ch_L |
Endocanthion right | En_R | Gonion right | Go_R |
Endocanthion left | En_L | Gonion left | Go_L |
Statistical analysis
Results
Comparison of linear measurements between normodivergent skeletal class I adolescent and adult females
Linear measurements (mm) | Adolescent (n = 45) | Adult (n = 45) | t value | P value |
---|---|---|---|---|
\({\overline{\text{x}}}\) ± SD | \({\overline{\text{x}}}\) ± SD | |||
Tr–G | 61.69 ± 11.87 | 63.12 ± 7.67 | 0.679 | 0.499 |
N′–Me′ | 111.57 ± 5.02 | 113.80 ± 3.43 | 2.459 | 0.016* |
N′–Sn | 49.82 ± 2.91 | 50.88 ± 1.99 | 2.005 | 0.048* |
Sn–Me′ | 64.36 ± 4.04 | 65.70 ± 2.74 | 1.836 | 0.070 |
Tra_R–Go′_R | 47.56 ± 4.19 | 51.24 ± 3.35 | 4.603 | 0.000** |
Tra_L–Go′_L | 47.31 ± 5.10 | 51.10 ± 3.79 | 4.001 | 0.000** |
Ls–Li | 18.62 ± 2.11 | 18.83 ± 2.15 | 0.483 | 0.630 |
Sto–Me′ | 44.02 ± 3.73 | 44.38 ± 2.53 | 0.536 | 0.593 |
Sl–Me′ | 27.79 ± 3.67 | 28.60 ± 2.39 | 1.231 | 0.222 |
Sn–Tra_R | 111.26 ± 4.59 | 113.03 ± 3.22 | 2.121 | 0.037* |
Sn–Tra_L | 110.76 ± 4.74 | 113.55 ± 3.12 | 3.290 | 0.001* |
Go′–Me′_R | 84.20 ± 5.01 | 88.07 ± 3.09 | − 4.417 | 0.000** |
Go′–Me′_L | 84.19 ± 5.06 | 88.11 ± 3.18 | − 4.402 | 0.000** |
Tra_R–Tra_L | 139.01 ± 5.53 | 142.33 ± 3.11 | 3.509 | 0.001* |
Go′_R–Go′_L | 115.30 ± 6.17 | 119.83 ± 4.34 | 4.019 | 0.000** |
Zy_R–Zy_L | 110.60 ± 5.30 | 114.15 ± 2.97 | 3.925 | 0.000** |
Ck_R–Ck_L | 94.98 ± 4.51 | 101.05 ± 2.59 | 7.828 | 0.000** |
Ex_R–Ex_L | 92.90 ± 5.02 | 94.81 ± 2.99 | 2.186 | 0.031* |
En_R–En_L | 35.01 ± 2.57 | 35.55 ± 1.84 | 1.149 | 0.254 |
Ch_R–Ch_L | 44.59 ± 3.26 | 48.57 ± 2.73 | 6.288 | 0.000** |
Al_R–Al_L | 31.84 ± 2.37 | 32.94 ± 1.84 | 2.464 | 0.016* |
Comparison of angular measurements between normodivergent skeletal class I adolescent and adult females
Angular measurements (°) | Adolescent (n = 45) | Adult (n = 45) | t value | P value |
---|---|---|---|---|
\({\overline{\text{x}}}\) ± SD | \({\overline{\text{x}}}\) ± SD | |||
G–N′–Pn | 142.20 ± 5.00 | 142.96 ± 5.72 | 0.670 | 0.503 |
N′–Sn–Pg′ | 163.19 ± 4.14 | 163.84 ± 4.17 | 0.740 | 0.461 |
N′–Prn–Pg′ | 137.41 ± 3.68 | 136.51 ± 3.75 | − 1.144 | 0.256 |
Sn–N–Sl | 7.53 ± 2.30 | 7.68 ± 2.08 | 0.323 | 0.748 |
Prn–Sn–Ls | 120.37 ± 9.87 | 120.68 ± 10.11 | 0.144 | 0.886 |
Li–Sl–Pg′ | 142.01 ± 12.79 | 141.73 ± 13.36 | − 0.102 | 0.919 |
Go′_R–Pg′–Go′_L | 78.76 ± 3.27 | 79.94 ± 4.61 | 1.405 | 0.164 |
Ls–Sto–Li | 145.12 ± 10.95 | 143.07 ± 12.38 | − 0.831 | 0.408 |
Tra_R–Go_R–Me′ | 133.21 ± 2.47 | 132.72 ± 3.37 | 0.789 | 0.432 |
Tra_L–Go_L–Me′ | 133.22 ± 2.57 | 132.91 ± 3.80 | 0.465 | 0.643 |
Comparison of ratio measurements between normodivergent skeletal class I adolescent and adult females
Ratio measurements (100%) | Adolescent (n = 45) | Adult (n = 45) | t value | P value |
---|---|---|---|---|
\({\overline{\text{x}}}\) ± SD | \({\overline{\text{x}}}\) ± SD | |||
N′–Sn/N′–Me′ | 0.45 ± 0.02 | 0.45 ± 0.01 | − 0.183 | 0.855 |
Sn–Me′/N′–Me′ | 0.58 ± 0.02 | 0.57 ± 0.02 | − 0.688 | 0.493 |
N′–Sn/Sn–Me′ | 0.78 ± 0.08 | 0.77 ± 0.04 | 0.094 | 0.925 |
Sto–Me′/N′–Me′ | 0.39 ± 0.03 | 0.39 ± 0.02 | − 1.594 | 0.114 |
Sl–Me′/N′–Me′ | 0.25 ± 0.03 | 0.25 ± 0.02 | − 0.297 | 0.767 |
N′–Me′/Tra_R–Go′_R | 2.30 ± 0.16 | 2.33 ± 0.15 | 0.983 | 0.351 |
N′–Me′/Tra_L–Go′_L | 2.33 ± 0.15 | 2.33 ± 0.21 | 0.764 | 0.904 |
N′–Sn/Tra_R–Go′_R | 0.99 ± 0.09 | 1.01 ± 0.07 | − 1.309 | 0.447 |
N′–Sn/Tra_L–Go′_L | 1.03 ± 0.12 | 1.01 ± 0.09 | 0.700 | 0.194 |
Sn–Me′/Tra_R–Go′_R | 1.31 ± 0.09 | 1.30 ± 0.10 | − 0.499 | 0.619 |
Sn–Me′/Tra_L–Go′_L | 1.30 ± 0.11 | 1.31 ± 0.09 | 0.108 | 0.914 |
Ch_R–Ch_L/Ls–Li | 2.42 ± 0.35 | 2.69 ± 0.29 | 3.930 | 0.000** |
Ex_R–Ex_L/Tra_R–Tra_L | 0.67 ± 0.03 | 0.66 ± 0.02 | − 0.553 | 0.582 |
Ex_R–Ex_L/Go′_R–Go′_L | 0.80 ± 0.04 | 0.73 ± 0.03 | − 9.659 | 0.000** |
Go′_R–Go′_L/Tra_R–Tra_L | 0.83 ± 0.03 | 0.84 ± 0.02 | 2.071 | 0.041* |
Sn–Tra_R/Sn–Tra_L | 1.00 ± 0.02 | 1.00 ± 0.02 | − 1.709 | 0.091 |
Go′–Me′_R/Go′–Me′_L | 0.99 ± 0.04 | 0.99 ± 0.06 | − 0.113 | 0.910 |
Comparison of linear measurements between adolescent females with hyperdivergent skeletal class II and those with normodivergent skeletal class I malocclusion
Linear measurements (mm) | Hyperdivergent Class II (n = 35) | Normodivergent Class I (n = 45) | t value | P value |
---|---|---|---|---|
\({\overline{\text{x}}}\) ± SD | \({\overline{\text{x}}}\)± SD | |||
Tr-G | 64.58 ± 9.38 | 61.69 ± 11.87 | 1.181 | 0.241 |
N′-Me′ | 112.67 ± 6.86 | 111.57 ± 5.02 | 0.829 | 0.409 |
N′-Sn | 49.64 ± 3.98 | 49.82 ± 2.91 | − 0.240 | 0.811 |
Sn-Me′ | 67.17 ± 4.69 | 64.36 ± 4.04 | 2.877 | 0.005* |
Tra_R-Go′_R | 45.81 ± 2.69 | 47.56 ± 4.19 | − 2.145 | 0.035* |
Tra_L-Go′_L | 45.29 ± 2.66 | 47.31 ± 5.10 | − 2.121 | 0.037* |
Ls-Li | 19.35 ± 2.44 | 18.62 ± 2.11 | 1.431 | 0.156 |
Sto-Me′ | 46.41 ± 4.13 | 44.02 ± 3.73 | 2.710 | 0.008* |
Sl-Me′ | 29.16 ± 3.56 | 27.79 ± 3.67 | 1.679 | 0.097 |
Sn-Tra_R | 110.05 ± 4.19 | 111.26 ± 4.59 | − 1.219 | 0.226 |
Sn-Tra_L | 109.60 ± 4.42 | 110.76 ± 4.74 | − 1.120 | 0.266 |
Go′-Me′_R | 80.58 ± 3.13 | 84.20 ± 5.01 | 3.741 | 0.000** |
Go′-Me′_L | 80.50 ± 3.26 | 84.19 ± 5.06 | 3.748 | 0.000** |
Tra_R-Tra_L | 136.81 ± 5.60 | 139.01 ± 5.53 | − 1.757 | 0.083 |
Go′_R-Go′_L | 111.06 ± 6.21 | 115.30 ± 6.17 | − 3.042 | 0.003* |
Zy_R-Zy_L | 108.15 ± 5.25 | 110.60 ± 5.30 | − 2.058 | 0.043* |
Ck_R-Ck_L | 92.17 ± 4.26 | 94.98 ± 4.51 | − 2.837 | 0.006* |
Ex_R-Ex_L | 93.23 ± 3.55 | 92.90 ± 5.02 | 0.329 | 0.743 |
En_R-En_L | 34.46 ± 2.32 | 35.01 ± 2.57 | − 0.979 | 0.331 |
Ch_R-Ch_L | 43.96 ± 3.79 | 44.59 ± 3.26 | − 0.794 | 0.430 |
Al_R-Al_L | 31.71 ± 2.53 | 31.84 ± 2.37 | − 0.235 | 0.815 |
Comparison of angular measurements between adolescent females with hyperdivergent skeletal class II and those with normodivergent skeletal class I malocclusion
Angular measurements (°) | hyperdivergent Class II (n = 35) | normodivergent Class I (n = 45) | t value | P value |
---|---|---|---|---|
\({\overline{\text{x}}}\) ± SD | \({\overline{\text{x}}}\) ± SD | |||
G-N′-Pn | 144.33 ± 4.74 | 142.20 ± 5.00 | 1.936 | 0.057 |
N′-Sn-Pg′ | 156.19 ± 3.68 | 163.19 ± 4.14 | − 7.874 | 0.000** |
N′-Prn-Pg′ | 133.36 ± 3.55 | 137.41 ± 3.68 | − 4.956 | 0.000** |
Sn-N-Sl | 9.77 ± 1.97 | 7.53 ± 2.30 | − 4.590 | 0.000** |
Prn-Sn-Ls | 123.95 ± 8.29 | 120.37 ± 9.87 | 1.724 | 0.089 |
Li-Sl-Pg′ | 148.28 ± 11.41 | 142.01 ± 12.79 | 2.280 | 0.025* |
Go′_R-Pg′-Go′_L | 80.06 ± 3.68 | 78.76 ± 3.27 | 1.670 | 0.099 |
Ls-Sto-Li | 147.30 ± 10.16 | 145.12 ± 10.95 | 0.909 | 0.366 |
Tra_R-Go_R-Me′ | 138.56 ± 2.96 | 133.21 ± 2.47 | − 8.801 | 0.000** |
Tra_L-Go_L-Me′ | 138.53 ± 2.99 | 130.22 ± 2.57 | − 8.513 | 0.000** |
Comparison of ratio measurements between adolescent females with hyperdivergent skeletal class II and those with normodivergent skeletal class I malocclusion
Ratio measurements (100%) | Hyperdivergent Class II (n = 35) | Normodivergent Class I (n = 45) | t value | P value |
---|---|---|---|---|
\({\overline{\text{x}}}\) ± SD | \({\overline{\text{x}}}\) ± SD | |||
N′-Sn/N′-Me′ | 0.44 ± 0.02 | 0.45 ± 0.02 | − 0.758 | 0.451 |
Sn-Me′/N′-Me′ | 0.60 ± 0.02 | 0.58 ± 0.02 | 3.416 | 0.001* |
N′-Sn/Sn-Me′ | 0.74 ± 0.07 | 0.78 ± 0.08 | − 1.980 | 0.051 |
Sto-Me′/N′-Me′ | 0.41 ± 0.03 | 0.39 ± 0.03 | 3.124 | 0.003* |
Sl-Me′/N′-Me′ | 0.26 ± 0.03 | 0.25 ± 0.03 | 1.614 | 0.111 |
N′-Me′/Tra_R-Go′_R | 2.52 ± 0.17 | 2.30 ± 0.16 | 6.046 | 0.000** |
N′-Me′/Tra_L-Go′_L | 2.51 ± 0.16 | 2.33 ± 0.15 | 5.325 | 0.000** |
N′-Sn/Tra_R-Go′_R | 1.11 ± 0.09 | 0.99 ± 0.09 | 5.636 | 0.000** |
N′-Sn/Tra_L-Go′_L | 1.11 ± 0.09 | 1.03 ± 0.09 | 4.125 | 0.000** |
Sn-Me′/Tra_R-Go′_R | 1.46 ± 0.13 | 1.31 ± 0.09 | 6.100 | 0.000** |
Sn-Me′/Tra_L-Go′_L | 1.45 ± 0.15 | 1.30 ± 0.11 | 5.116 | 0.000** |
Ch_R-Ch_L/Ls-Li | 2.30 ± 0.31 | 2.42 ± 0.35 | − 1.591 | 0.116 |
Ex_R-Ex_L/Tra_R-Tra_L | 0.68 ± 0.03 | 0.67 ± 0.03 | 2.259 | 0.027* |
Ex_R-Ex_L/Go′_R-Go′_L | 0.84 ± 0.05 | 0.80 ± 0.04 | 3.079 | 0.003* |
Go′_R-Go′_L/Tra_R-Tra_L | 0.81 ± 0.03 | 0.83 ± 0.03 | − 2.739 | 0.008* |
Sn-Tra_R/Sn-Tra_L | 1.00 ± 0.02 | 1.00 ± 0.02 | − 0.157 | 0.875 |
Go′-Me′_R/Go′-Me′_L | 0.99 ± 0.03 | 0.99 ± 0.04 | − 0.032 | 0.974 |
Comparison of linear measurements between adult females with hyperdivergent skeletal class II and those with normodivergent skeletal class I malocclusion
Linear measurements (mm) | Hyperdivergent Class II (n = 35) | Normodivergent Class I (n = 45) | t value | P value |
---|---|---|---|---|
\({\overline{\text{x}}}\) ± SD | \({\overline{\text{x}}}\) ± SD | |||
Tr-G | 61.49 ± 10.39 | 63.12 ± 7.67 | − 0.807 | 0.422 |
N′-Me′ | 117.52 ± 5.01 | 113.80 ± 3.43 | 3.938 | 0.000** |
N′-Sn | 51.91 ± 2.68 | 50.88 ± 1.99 | 1.986 | 0.051 |
Sn-Me′ | 69.07 ± 4.15 | 65.70 ± 2.74 | 4.367 | 0.000** |
Tra_R-Go′_R | 47.48 ± 3.88 | 51.24 ± 3.35 | 4.642 | 0.000** |
Tra_L-Go′_L | 47.46 ± 3.80 | 51.10 ± 3.79 | 4.248 | 0.000** |
Ls-Li | 19.32 ± 2.30 | 18.83 ± 2.15 | 0.973 | 0.334 |
Sto-Me′ | 46.94 ± 3.74 | 44.38 ± 2.53 | 3.644 | 0.000** |
Sl-Me′ | 30.44 ± 3.93 | 28.60 ± 2.39 | 2.593 | 0.011* |
Sn-Tra_R | 110.37 ± 4.87 | 113.03 ± 3.22 | − 2.935 | 0.004* |
Sn-Tra_L | 111.06 ± 4.45 | 113.55 ± 3.12 | − 2.934 | 0.004* |
Go′-Me′_R | 84.62 ± 3.86 | 88.07 ± 3.09 | 4.448 | 0.000** |
Go′-Me′_L | 84.59 ± 3.96 | 88.11 ± 3.18 | 4.410 | 0.000** |
Tra_R-Tra_L | 139.30 ± 4.59 | 142.33 ± 3.11 | − 3.512 | 0.001* |
Go′_R-Go′_L | 115.55 ± 5.33 | 119.83 ± 4.34 | − 3.952 | 0.000** |
Zy_R-Zy_L | 111.10 ± 3.96 | 114.15 ± 2.97 | − 3.938 | 0.000** |
Ck_R-Ck_L | 94.90 ± 3.25 | 101.05 ± 2.59 | − 9.428 | 0.000** |
Ex_R-Ex_L | 93.58 ± 3.07 | 94.81 ± 2.99 | − 1.799 | 0.076 |
En_R-En_L | 34.41 ± 1.95 | 35.55 ± 1.84 | − 2.671 | 0.009* |
Ch_R-Ch_L | 47.63 ± 2.99 | 48.57 ± 2.73 | − 1.469 | 0.146 |
Al_R-Al_L | 31.15 ± 1.86 | 32.94 ± 1.84 | − 4.296 | 0.000** |
Comparison of angular measurements between adult females with hyperdivergent skeletal class II and those with normodivergent skeletal class I malocclusion
Angular measurements (°) | Hyperdivergent Class II (n = 35) | Normodivergent Class I (n = 45) | t value | P value |
---|---|---|---|---|
\({\overline{\text{x}}}\)± SD | \({\overline{\text{x}}}\) ± SD | |||
G-N′-Pn | 144.37 ± 4.82 | 142.96 ± 5.72 | − 1.169 | 0.246 |
N′-Sn-Pg′ | 157.69 ± 3.67 | 163.84 ± 4.17 | 6.893 | 0.000** |
N′-Prn-Pg′ | 132.97 ± 3.61 | 136.51 ± 3.75 | 4.257 | 0.000** |
Sn-N-Sl | 9.11 ± 1.84 | 7.68 ± 2.08 | − 3.214 | 0.002* |
Prn-Sn-Ls | 121.54 ± 8.51 | 120.68 ± 10.11 | − 0.406 | 0.686 |
Li-Sl-Pg′ | 148.83 ± 9.39 | 141.73 ± 13.36 | − 2.674 | 0.009* |
Go′_R-Pg′-Go′_L | 79.53 ± 4.53 | 79.94 ± 4.61 | 0.397 | 0.692 |
Ls-Sto-Li | 147.52 ± 9.65 | 143.07 ± 12.38 | − 1.750 | 0.084 |
Tra_R-Go_R-Me′ | 137.76 ± 3.74 | 132.72 ± 3.37 | − 6.313 | 0.000** |
Tra_L-Go_L-Me′ | 137.73 ± 3.70 | 132.91 ± 3.80 | − 5.694 | 0.000** |
Comparison of ratio measurements between adult females with hyperdivergent skeletal class II and those with normodivergent skeletal class I malocclusion
Ratio measurements (100%) | Hyperdivergent Class II (n = 35) | Normodivergent Class I (n = 45) | t value | P value |
---|---|---|---|---|
\({\overline{\text{x}}}\) ± SD | \({\overline{\text{x}}}\) ± SD | |||
N′-Sn/N′-Me′ | 0.45 ± 0.02 | 0.45 ± 0.01 | 0.078 | 0.938 |
Sn-Me′/N′-Me′ | 0.59 ± 0.02 | 0.57 ± 0.02 | 4.002 | 0.000** |
N′-Sn/Sn-Me′ | 0.76 ± 0.51 | 0.77 ± 0.04 | − 2.071 | 0.042* |
Sto-Me′/N′-Me′ | 0.40 ± 0.02 | 0.39 ± 0.02 | 3.255 | 0.002* |
Sl-Me′/N′-Me′ | 0.26 ± 0.03 | 0.25 ± 0.02 | 2.047 | 0.044* |
N′-Me′/Tra_R-Go′_R | 2.49 ± 0.20 | 2.33 ± 0.15 | 4.186 | 0.000** |
N′-Me′/Tra_L-Go′_L | 2.48 ± 0.19 | 2.33 ± 0.21 | 3.339 | 0.001** |
N′-Sn/Tra_R-Go′_R | 1.11 ± 0.09 | 1.01 ± 0.07 | 5.541 | 0.000** |
N′-Sn/Tra_L-Go′_L | 1.13 ± 0.07 | 1.00 ± 0.09 | 6.820 | 0.000** |
Sn-Me′/Tra_R-Go′_R | 1.46 ± 0.13 | 1.30 ± 0.10 | 6.583 | 0.000** |
Sn-Me′/Tra_L-Go′_L | 1.46 ± 0.13 | 1.31 ± 0.09 | 6.326 | 0.000** |
Ch_R-Ch_L/Ls-Li | 2.53 ± 0.35 | 2.69 ± 0.29 | − 2.197 | 0.031* |
Ex_R-Ex_L/Tra_R-Tra_L | 0.67 ± 0.03 | 0.66 ± 0.02 | 1.633 | 0.129 |
Ex_R-Ex_L/Go′_R-Go′_L | 0.81 ± 0.04 | 0.73 ± 0.03 | 9.733 | 0.000** |
Go′_R-Go′_L/Tra_R-Tra_L | 0.83 ± 0.03 | 0.84 ± 0.02 | − 2.417 | 0.018* |
Sn-Tra_R/Sn-Tra_L | 0.99 ± 0.03 | 1.00 ± 0.02 | − 0.418 | 0.631 |
Go′-Me′_R/Go′-Me′_L | 0.99 ± 0.04 | 0.99 ± 0.06 | − 0.307 | 0.760 |