Cephalometric Features of Class Iii Malocclusion.

AIM The study aimed to identify quantitative and relational characteristics of bone, dental and soft tissue structures for Class III malocclusion, according to gender and age range. MATERIAL AND METHODS 60 conventional lateral cephalograms were divided into two groups according to ANB angle: the group of cases with skeletal Class III (n = 36) and a control group with skeletal Class I (n = 24). There were performed 53 digital cephalometric measurements according to Steiner, Tweed and Jarabak analyzes. The Kolmogorov-Smirnov, t-student and Levene tests were used to find the characteristics of Class III, using SPSS 16.0 for Windows. RESUITS We found 14 parameters that distinguished the two classes disorders (the angles SNB, SND, FMA, IMPA, MeGoOcP, Mand 1-MeGo, NSAr, ArGoMe, NGoMe and SNPog; the distances Ao-Bo and lu-NPog; Holdaway and AFH ratios) and 3 parameters for the Class III age ranges (NGoAr angle, Ls-NsPog' distance and S-Ar:Ar-Go ratio) (p ≤ 0.05). There were found no significant differences between genders for skeletal Class III. CONCLUSION Emphasizing the cephalometric characteristics of Class III malocclusion, with the overall growth together with dental and occlusion development, requires early orthodontic therapy.