Background
Methods
The sample
Condylar 3D reconstruction, and calculation of volume and surface
Landmark definition | Definition |
---|---|
Superior contour (UCo) | Most superior extent of the mandibular condyle from the anterior, mesial, lateral, and superior planes of view. |
Lateral contours (LCos) | Most lateral extent of the mandibular condyle viewed from the anterior, posterior, lateral, and superior planes of view |
Inferior contour (ICo) | Most inferior extent of the mandibular condyle from the anterior, mesial, lateral, and superior planes of view. The exact cut where the surface of coronal section increase (because of the beginning of sigmoid area) instead of decrease. This cut allowed the segmentation of the condylar head, without the sigmoid area. |
Studies on method error
Statistical analyses
TMJ side | Gender | ||||||||
---|---|---|---|---|---|---|---|---|---|
Condylar volume (mm3) | Condylar surface (mm2) | Condylar volume (mm3) | Condylar surface (mm2) | ||||||
RIGHT (N = 150 TMJ) | LEFT (N = 150 TMJ) | RIGHT (N = 150 TMJ) | LEFT (N = 150 TMJ) | MALES (N = 148 TMJ) | FEMALES (N = 152 TMJ) | FEMALES (N = 152 TMJ) | MALES (N = 148 TMJ) | ||
Mean
| 693.61 | 666.99 | 411.24 | 389.41 | 691.26 | 669.65 | 394.77 | 406.02 | |
SD
| 62.82 | 48.67 | 57.99 | 56.63 | 54.52 | 58.80 | 60.73 | 55.22 | |
95% Confidence interval for mean
|
Lower Bound
| 683.48 | 659.15 | 401.88 | 380.27 | 682.4 | 660.22 | 385.04 | 397.05 |
Upper Bound
| 703.75 | 674.85 | 420.59 | 398.55 | 700.1 | 679.07 | 404.5 | 414.99 | |
Minimum
| 487.5 | 560.4 | 310.2 | 310.2 | 560.4 | 487.5 | 310.2 | 311.6 | |
Maximum
| 871.2 | 798.4 | 498.8 | 498.7 | 798.4 | 871.2 | 498.8 | 498.7 | |
Range
| 383.7 | 238 | 188.6 | 188.5 | 238 | 383.7 | 188.6 | 187.1 | |
Kolmogorov-Smirnov Z
| 0.064 | 0.062 | 0.055 | 0.058 | 0.061 | 0.051 | 0.063 | 0.052 | |
p
| 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
N | Mean | Std. Deviation | Range | Minimum | Maximum | 95% Confidence Interval for mean | Kolmogorov-Smirnov Z | p | ||
---|---|---|---|---|---|---|---|---|---|---|
Lower bound | Upper bound | |||||||||
Morphological Index (females)
| 152 TMJ | 1.72 | 0.19 | 1 | 1.15 | 2.15 | 1.69 | 1.75 | 0.61 | 0.200 |
Morphological Index (males)
| 148 TMJ | 1.72 | 0.14 | 0.69 | 1.43 | 2.12 | 1.69 | 1.74 | 0.51 | 0.200 |
Morphological Index (right)
| 150 TMJ | 1.70 | 0.16 | 0.88 | 1.15 | 2.03 | 1.68 | 1.73 | 0.58 | 0.200 |
Morphological Index (left)
| 150 TMJ | 1.73 | 0.18 | 0.87 | 1.28 | 2.15 | 1.71 | 1.76 | 0.55 | 0.200 |
Morphological Index (whole sample)
| 300 TMJ | 1.72 | 0.17 | 1 | 1.15 | 2.15 | 1.70 | 1.74 | 0.44 | 0.200 |
CONDYLAR VOLUME | ||||||
---|---|---|---|---|---|---|
RIGHT | LEFT | Mean difference | 95% confidence interval of difference | t | Sig. | |
Mean
| 693.61 | 666.99 | 25.39 | Lower: 13.80 | 4.33 | 0.000 ** |
SD
| 62.82 | 48.67 | 5.86 | Upper: 36.98 | ||
MALES
|
FEMALES
|
Mean difference
|
95% confidence interval of difference
|
t
|
Sig. | |
Mean
| 691.26 | 669.65 | 21.61 | Lower: 8.72 | 3.29 | 0.001 ** |
SD
| 54.52 | 58.80 | 6.55 | Upper: 34.5 | ||
CONDYLAR SURFACE
| ||||||
RIGHT
|
LEFT
|
Mean difference
|
95% confidence interval of difference
|
t
|
Sig. | |
Mean
| 411.24 | 389.41 | 17.15 | Lower: 4.41 | 2.66 | 0.009** |
SD
| 57.99 | 56.63 | 6.45 | Upper: 29.89 | ||
MALES
|
FEMALES
|
Mean difference
|
95% confidence interval of difference
|
t
|
Sig. | |
Mean
| 406.02 | 394.77 | 11.25 | Lower: 1.95 | 1.68 | 0.095 NS |
SD
| 55.22 | 60.73 | 6.70 | Upper: 24.45 | ||
MORPHOLOGICAL INDEX
| ||||||
RIGHT
|
LEFT
|
Mean difference
|
95% confidence interval of difference
|
t
|
Sig. | |
Mean
| 1.70 | 1.73 | -0.03 | Lower: -0.069 | -1.57 | 0.118 NS |
SD
| 0.16 | 0.18 | 0.019 | Upper: 0.0078 | ||
MALES
|
FEMALES
|
Mean difference
|
95% confidence interval of difference
|
t
|
Sig. | |
Mean | 1.72 | 1.72 | 0.018 | Lower: -0.03 | 0.09 | 0.92 NS |
SD | 0.14 | 0.19 | 0.019 | Upper: 0.04 |