No abstract

The lengths of the maxillary central incisor and nasal bone, both parameters located in the frontonasal field, are affected in different skeletal malocclusions. The present findings, especially the deviation of the upper incisor length in different skeletal malocclusions, are considered relevant for orthodontic diagnostics and treatment.

The most important outcome of this study was reduced skull thickness in the occipital area and thickening of the frontal bone in females with skeletal Class II malocclusion compared with females with Class I. Deviations in the theca cranii are thus associated with skeletal Class II malocclusions.

CL women had a significantly thinner occipital bone compared with CL men (p = 0.027). Women with UCLP had significantly thicker occipital bone than the control women (incomplete CL) (p = 0.014). The study showed gender differences in skull thickness in different cleft types. It also demonstrated that particularly the occipital bone deviated in patients with UCLP, which may explain the considerable deviations in jaw shape and position, previously registered in patients with UCLP.