Cephalometric Features of Class II Div 1 and Class II Div 2 Malocclusion in Maharashtrian Population

Abstract

Objective

To describe and analyze the skeletal and dental characteristics associated with Class II division 1 (Class II/1) and Class II division 2 (Class II/2) malocclusions in the anteroposterior and vertical dimensions in Maharashtrian population.

Materials and Methods

200 lateral cephalograms were evaluated, out of which 100 films were of div 1and 100 films were of div 2 malocclusions, further subdivided based on gender. Lateral cephalograms were traced and different parameters were compared with each other.

Results

average mean ages of both groups was 23 – 26 years When comparison was done between difference in means of two groups (Table 3), there was no significant difference between mean values of parameters SNB, SNPOG, FACIAL ANGLE, Y-AXIS, LAFH, PAFH, FM ANGLE, GONIAL ANGLE, SN-MD ANGLE, MM ANGLE, and SADDLE ANGLE, (i.e. p>0.05) and highly significant difference between mean values of parameters SNA, ANB, FACIAL CONVEXITY,LI-MAND,UI-SN, and INTERINCISAL(i.e. p<0.01). Class II div 2 subjects showed retrognathic maxilla as compared to div 1 group, whereas incisor inclinations were reduced in div 2 group. In subjects with division1 the maxilla was normally positioned while in division 2 the maxilla was prognathic. Mandible was retrognathic in both groups. Lower incisors were proclined in both groups more so in division 1 malocclusion. Upper incisors were more proclined in div 1 and div 2 showed retroclined upper incisors. Interincisal angle was found acute in div 1 malocclusion while it was obtuse in div 1 malocclusion.

Conclusions

Distinct differences in morphological and dental characteristics were seen in Class II div 1 and div 2 cases should help clinician in deciding a specific treatment for these diverse subtypes of Class II malocclusion.