Aims: The aim of the presented study was to verify the process of measurement of transversal dimensions of jaws that could be used in orthodontic practice. Another objective was to measure transverse deficiencies (i.e. the difference between skeletal width of the lower and upper jaws, and all first molars inclination) with CBCT in patients with skeletal Class I. We also wanted to find out whether the values are different in patients with various vertical parameters. Material and method: The sample included 152 patients – 24 of those with unilateral crossbite and 9 with bilateral crossbite. All scans were made with NewTom VGi-Evo (QR srl., Verona, Italy) with FOV 16 x 16 cm. The sample comprised boys and girls aged approx.14 without prior orthodontic treatment, with skeletal Class I according to ANB angle and WITS and with Angle Class I in molars. A standard cephalometric analysis in graphic module of PC Dent (CompuGroup Medical, Czech Republic) from lateral cephalogram made from CBCT scan was carried out. NSML and proportion of anterior and posterior facial height (SGo/NMe x 100) values were recorded. From CBCT scans linear and angular parameters were taken to determine dental and skeletal transverse deficiency. Results: There was proved a statistically significant difference between boys and girls only in the normodivergent group in the angle of lower first molars. The statistically significant difference in the angle of lower molars was found in hyperdivergent group. The individual groups (A, B, C, D, E) show statistically significant differences in the values of vestibulooral inclination of upper molars, in skeletal width of the lower jaw, and in the difference of skeletal bases width. Conclusion: Discrepancy in the transversal dimensions of jaws is not related only to lateral crossbite but it can be found in patients with relatively normal widths. Vestibulooral inclinations of first molars made the compensation of skeletal problem underlying transverse deficiency possible.
- MeSH
- Cephalometry * methods MeSH
- Humans MeSH
- Malocclusion diagnosis MeSH
- Cone-Beam Computed Tomography methods MeSH
- Dental Occlusion MeSH
- Check Tag
- Humans MeSH
- Publication type
- Clinical Study MeSH
