Vertical mandibular asymmetry in Angle's class II subdivision malocclusion

• Shireen siddiqui,*  
• Dr.Tripti Tikku,  
• Dr.Kamna Srivastava,  
• Dr.Snehlata Verma,  
• Dr.Rohit Khanna

Abstract

Background-Asymmetries in the lower third of the face are mainly due to mandibular asymmetries because of asymmetry in the height of condyle and ramus.1 As there is morphological variability in jaw bases in different malocclusion, it is anticipated that there will be variability in mandibular asymmetry. Considering this, it is decided to assess mandibular asymmetry in subjects with Angle’s class II subdivision and compare with subjects with Angle’s class I malocclusion. Material and method-A total of 40 subjects coming to the department of orthodontics for fixed orthodontic treatment were equally divided into two groups i.e., Angle’s class II subdivision malocclusion group and Angle’s class I malocclusion group have selected (clinical examination) to assess type of malocclusion after screening of 80 subjects. Orthopantomogram of these subjects were taken before start of treatment and condylar height (CH), ramal height (RH), total height (RH) and mandibular asymmetry Index by Habet’s formula were evaluated. Data was obtained and subjected to statistical analysis. Result- For group I and group II, CH (L>R), RH (R>L) and TH (L>R) but the difference was statistically significant only for condylar height of group II. Asymmetry indices did not show any significant difference between group I and group II. Conclusion- As mandibular asymmetry not show any significant difference between group I and group II hence it can be suggested that mandibular asymmetry in subjects with class II subdivision group was dentoalveolar in nature not skeletal.

Keywords

Mandibular asymmetry, Malocclusion, Condylar height, Ramal height, Asymmetry indices.