Table 3 Means and standard deviations of 2D and 3D measurements

 Arch length (1–2)

0.533

 Intermolar distance (3–3)

0.672

 Diastema length (1–4)

0.858

 Posterior segment length (2–4)

0.012*

 Maxillary central incisor length (6–7)

0.010*

 Mandibular height (18–19)

0.006*

 Upper mandibular length (18–25)

0.037*

 Lower mandibular length (19–22)

0.063

 Mandibular plane length (20–22)

0.019*

 Diagonal mandibular length (17–22)

0.014*

 Distance between the condyle to mandibular angle (17–19)

0.025*

 Mandibular central incisor length (23–24)

0.142

 Distance between first molar to central incisor (25–26)

0.213

 Mandibular height (17–20)

0.004*

 Angle composed between the lines 17–19 and 20–22

0.009*

 Angle composed by the landmarks 20, 22 and 24

0.305

 Angle composed by the landmarks 17, 20 and 22

0.599

 Arch width (7–7)

0.748

 Intermolar distance (9–9)

0.543

 Arch length (8–12)

0.988

 Posterior segment length (8–9)

0.725

 Diastema length (9–11)

0.365

 Mandibular interdiastemal breadth (10–10)

0.002*

 Intercoronoidal breadth (6–6)

0.558

 Thickness of condylar process (4–5)

<0.0001*

 Inferior mandibular body length (1–2)

0.405

 Anterior mentum height (2–3)

0.479

 Mandibular superior third width (13–13)

0.670

 Mandibular middle third width (14–14)

0.595

 Mandibular inferior third width (16–16)

0.466

 Distance between mentum foramens (15–15)

0.873