Size of lower jaw as an early indicator of skeletal class III development

Abstract

Of all the analyzed parameters, the following were selected as the early indicators of the development of skeletal class III on the lower jaw: greater total length of the lower jaw, proportional to the total lengths of cranial base and theupper jaw, as well as greater length of the lower jaw body, proportional to the length of the upper jaw body.

Cephalometric assessment of maxillary length in Serbian children with skeletal class III

“…Proportional relationships CdA/NBa, A*Snp*/NSe are, apart from a reduced maxillary length, additionally distorted by significantly lower total length of the cranial base, and the length of the anterior cranial base, which is lower in the group with skeletal class III, although the difference compared to the results of the control group is not significant. Irregularities of the tested proportions, A*Snp*/Pg*Go, CdA/CdGn can be considered to be the sole consequence of significantly lower maxillary lengths, since mandibular lengths were not significantly changed in children with skeletal class III, also shown by the results of our previous studies 18 . The degree of proportion irregularities of total maxillary and mandibular lengths is considered to be an important factor in predicting effectiveness of the therapy, so if it is very high, it is a bad prognostic sign 19 .…”